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From dmitriu...@apache.org
Subject [2/2] git commit: AMBARI-5580. Introduce operation_level request parameter (dlysnichenko)
Date Thu, 08 May 2014 20:02:30 GMT
AMBARI-5580. Introduce operation_level request parameter (dlysnichenko)


Project: http://git-wip-us.apache.org/repos/asf/ambari/repo
Commit: http://git-wip-us.apache.org/repos/asf/ambari/commit/5dff4516
Tree: http://git-wip-us.apache.org/repos/asf/ambari/tree/5dff4516
Diff: http://git-wip-us.apache.org/repos/asf/ambari/diff/5dff4516

Branch: refs/heads/trunk
Commit: 5dff4516ae9ab962aaefcdf535e0d41df698e948
Parents: 2fb2a17
Author: Lisnichenko Dmitro <dlysnichenko@hortonworks.com>
Authored: Tue Apr 15 23:02:35 2014 +0300
Committer: Lisnichenko Dmitro <dlysnichenko@hortonworks.com>
Committed: Thu May 8 23:02:00 2014 +0300

----------------------------------------------------------------------
 .../ambari/server/actionmanager/Request.java    |  37 ++++
 .../ambari/server/agent/ExecutionCommand.java   |   4 +
 .../ambari/server/agent/HeartbeatMonitor.java   |   3 +
 .../services/parsers/JsonRequestBodyParser.java |   8 +-
 .../api/services/parsers/RequestBodyParser.java |   5 +
 .../controller/ActionExecutionContext.java      |  11 ++
 .../AmbariCustomCommandExecutionHelper.java     |   8 +
 .../AmbariManagementControllerImpl.java         |  60 +++---
 .../server/controller/ExecuteActionRequest.java |   8 +
 .../controller/MaintenanceStateHelper.java      |  56 +++---
 .../internal/RequestOperationLevel.java         | 147 ++++++++++++++
 .../internal/RequestResourceProvider.java       | 122 +++++-------
 .../server/orm/entities/ClusterStateEntity.java |   2 +-
 .../server/orm/entities/RequestEntity.java      |  12 ++
 .../entities/RequestOperationLevelEntity.java   | 141 +++++++++++++
 .../server/upgrade/SchemaUpgradeHelper.java     |   1 +
 .../server/upgrade/UpgradeCatalog160.java       |   4 +-
 .../server/upgrade/UpgradeCatalog161.java       |  89 +++++++++
 .../main/resources/Ambari-DDL-MySQL-CREATE.sql  |   3 +
 .../main/resources/Ambari-DDL-Oracle-CREATE.sql |   3 +
 .../resources/Ambari-DDL-Postgres-CREATE.sql    |   7 +-
 .../Ambari-DDL-Postgres-EMBEDDED-CREATE.sql     |   8 +-
 .../src/main/resources/META-INF/persistence.xml |   1 +
 .../src/main/resources/properties.json          |   1 +
 .../actionmanager/TestActionDBAccessorImpl.java |   2 +-
 .../AmbariManagementControllerTest.java         |  56 +++---
 .../internal/RequestOperationLevelTest.java     |  58 ++++++
 .../internal/RequestResourceProviderTest.java   | 102 +++++++++-
 .../server/upgrade/UpgradeCatalog161Test.java   | 196 +++++++++++++++++++
 29 files changed, 992 insertions(+), 163 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/actionmanager/Request.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/actionmanager/Request.java b/ambari-server/src/main/java/org/apache/ambari/server/actionmanager/Request.java
index e209076..b3b5279 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/actionmanager/Request.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/actionmanager/Request.java
@@ -23,8 +23,11 @@ import com.google.inject.assistedinject.Assisted;
 import com.google.inject.assistedinject.AssistedInject;
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.ExecuteActionRequest;
+import org.apache.ambari.server.controller.internal.RequestOperationLevel;
 import org.apache.ambari.server.controller.internal.RequestResourceFilter;
+import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.orm.entities.RequestEntity;
+import org.apache.ambari.server.orm.entities.RequestOperationLevelEntity;
 import org.apache.ambari.server.orm.entities.RequestResourceFilterEntity;
 import org.apache.ambari.server.orm.entities.StageEntity;
 import org.apache.ambari.server.state.Clusters;
@@ -51,6 +54,7 @@ public class Request {
   private HostRoleStatus status; // not persisted yet
   private String inputs;
   private List<RequestResourceFilter> resourceFilters;
+  private RequestOperationLevel operationLevel;
   private RequestType requestType;
 
   private Collection<Stage> stages = new ArrayList<Stage>();
@@ -114,6 +118,7 @@ public class Request {
     this(stages, clusters);
     if (actionRequest != null) {
       this.resourceFilters = actionRequest.getResourceFilters();
+      this.operationLevel = actionRequest.getOperationLevel();
       this.inputs = gson.toJson(actionRequest.getParameters());
       this.requestType = actionRequest.isCommand() ? RequestType.COMMAND : RequestType.ACTION;
       this.commandName = actionRequest.isCommand() ? actionRequest.getCommandName() : actionRequest.getActionName();
@@ -161,6 +166,16 @@ public class Request {
         this.resourceFilters.add(resourceFilter);
       }
     }
+    RequestOperationLevelEntity operationLevelEntity = entity.getRequestOperationLevel();
+    if (operationLevelEntity != null) {
+      this.operationLevel = new RequestOperationLevel(
+          Resource.Type.valueOf(operationLevelEntity.getLevel()),
+        operationLevelEntity.getClusterName(),
+        operationLevelEntity.getServiceName(),
+        operationLevelEntity.getHostComponentName(),
+        operationLevelEntity.getHostName()
+      );
+    }
   }
 
   private List<String> getHostsList(String hosts) {
@@ -216,6 +231,19 @@ public class Request {
       requestEntity.setResourceFilterEntities(filterEntities);
     }
 
+    if (operationLevel != null) {
+      RequestOperationLevelEntity operationLevelEntity =
+              new RequestOperationLevelEntity();
+      operationLevelEntity.setLevel(operationLevel.getLevel().toString());
+      operationLevelEntity.setClusterName(operationLevel.getClusterName());
+      operationLevelEntity.setServiceName(operationLevel.getServiceName());
+      operationLevelEntity.setHostComponentName(operationLevel.getHostComponentName());
+      operationLevelEntity.setHostName(operationLevel.getHostName());
+      operationLevelEntity.setRequestEntity(requestEntity);
+      operationLevelEntity.setRequestId(requestId);
+      requestEntity.setRequestOperationLevel(operationLevelEntity);
+    }
+
     return requestEntity;
   }
 
@@ -272,6 +300,14 @@ public class Request {
     this.resourceFilters = resourceFilters;
   }
 
+  public RequestOperationLevel getOperationLevel() {
+    return operationLevel;
+  }
+
+  public void setOperationLevel(RequestOperationLevel operationLevel) {
+    this.operationLevel = operationLevel;
+  }
+
   public RequestType getRequestType() {
     return requestType;
   }
@@ -316,6 +352,7 @@ public class Request {
         ", endTime=" + endTime +
         ", inputs='" + inputs + '\'' +
         ", resourceFilters='" + resourceFilters + '\'' +
+        ", operationLevel='" + operationLevel + '\'' +
         ", requestType=" + requestType +
         ", stages=" + stages +
         '}';

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/agent/ExecutionCommand.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/agent/ExecutionCommand.java b/ambari-server/src/main/java/org/apache/ambari/server/agent/ExecutionCommand.java
index 40e9abb..e4b5fc5 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/agent/ExecutionCommand.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/agent/ExecutionCommand.java
@@ -55,6 +55,10 @@ public class ExecutionCommand extends AgentCommand {
   private Map<String, String> commandParams;
   private String serviceName;
   private String componentName;
+
+  /**
+   * Used for ignoring nagios alerts at agent
+   */
   private Set<Map<String,String>> passiveInfo;
 
   @JsonProperty("commandId")

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/agent/HeartbeatMonitor.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/agent/HeartbeatMonitor.java b/ambari-server/src/main/java/org/apache/ambari/server/agent/HeartbeatMonitor.java
index 7452a7b..5eb7ead 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/agent/HeartbeatMonitor.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/agent/HeartbeatMonitor.java
@@ -29,6 +29,7 @@ import org.apache.ambari.server.actionmanager.ActionManager;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
 import org.apache.ambari.server.configuration.Configuration;
 import org.apache.ambari.server.controller.AmbariManagementController;
+import org.apache.ambari.server.controller.MaintenanceStateHelper;
 import org.apache.ambari.server.state.*;
 import org.apache.ambari.server.state.fsm.InvalidStateTransitionException;
 import org.apache.ambari.server.state.host.HostHeartbeatLostEvent;
@@ -52,6 +53,7 @@ public class HeartbeatMonitor implements Runnable {
   private final AmbariMetaInfo ambariMetaInfo;
   private final AmbariManagementController ambariManagementController;
   private final Configuration configuration;
+  private final MaintenanceStateHelper maintenanceStateHelper;
 
   public HeartbeatMonitor(Clusters clusters, ActionQueue aq, ActionManager am,
                           int threadWakeupInterval, Injector injector) {
@@ -64,6 +66,7 @@ public class HeartbeatMonitor implements Runnable {
     this.ambariManagementController = injector.getInstance(
             AmbariManagementController.class);
     this.configuration = injector.getInstance(Configuration.class);
+    this.maintenanceStateHelper = injector.getInstance(MaintenanceStateHelper.class);
   }
 
   public void shutdown() {

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParser.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParser.java b/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParser.java
index 3443b72..0d75a8e 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParser.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParser.java
@@ -133,9 +133,13 @@ public class JsonRequestBodyParser implements RequestBodyParser {
         }
       } else {
         // field
-        if (path.startsWith(REQUEST_INFO_PATH)) {
+        if (path.equals(REQUEST_INFO_PATH)) {
+           requestInfoProps.put(PropertyHelper.getPropertyId(null, name),
+                   child.asText());
+        } else if (path.startsWith(REQUEST_INFO_PATH)) {
           requestInfoProps.put(PropertyHelper.getPropertyId(
-              path.substring(REQUEST_INFO_PATH.length()), name), child.asText());
+              path.substring(REQUEST_INFO_PATH.length() + SLASH.length()), name),
+                  child.asText());
         } else {
           propertySet.getProperties().put(PropertyHelper.getPropertyId(
               path.equals(BODY_TITLE) ? "" : path, name), child.asText());

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/RequestBodyParser.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/RequestBodyParser.java b/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/RequestBodyParser.java
index aefcb52..6e9c4c5 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/RequestBodyParser.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/api/services/parsers/RequestBodyParser.java
@@ -33,6 +33,11 @@ public interface RequestBodyParser {
   public static final String REQUEST_INFO_PATH = "RequestInfo";
 
   /**
+   * Slash symbol
+   */
+  public static final String SLASH = "/";
+
+  /**
    * Category path to ignore parsing of the child node
    */
   public static final String REQUEST_BLOB_TITLE = "RequestBodyInfo";

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/ActionExecutionContext.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/ActionExecutionContext.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/ActionExecutionContext.java
index 37a404f..ee64c0d 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/ActionExecutionContext.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/ActionExecutionContext.java
@@ -20,6 +20,7 @@
 package org.apache.ambari.server.controller;
 
 import org.apache.ambari.server.actionmanager.TargetHostType;
+import org.apache.ambari.server.controller.internal.RequestOperationLevel;
 import org.apache.ambari.server.controller.internal.RequestResourceFilter;
 
 import java.util.List;
@@ -32,6 +33,7 @@ public class ActionExecutionContext {
   private final String clusterName;
   private final String actionName;
   private List<RequestResourceFilter> resourceFilters;
+  private RequestOperationLevel operationLevel;
   private Map<String, String> parameters;
   private TargetHostType targetType;
   private Short timeout;
@@ -97,6 +99,14 @@ public class ActionExecutionContext {
     return resourceFilters;
   }
 
+  public RequestOperationLevel getOperationLevel() {
+    return operationLevel;
+  }
+
+  public void setOperationLevel(RequestOperationLevel operationLevel) {
+    this.operationLevel = operationLevel;
+  }
+
   public String getExpectedServiceName() {
     return expectedServiceName;
   }
@@ -111,6 +121,7 @@ public class ActionExecutionContext {
       "clusterName='" + clusterName + '\'' +
       ", actionName='" + actionName + '\'' +
       ", resourceFilters=" + resourceFilters +
+      ", operationLevel=" + operationLevel +
       ", parameters=" + parameters +
       ", targetType=" + targetType +
       ", timeout=" + timeout +

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java
index 89eaa40..d2ba553 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java
@@ -30,6 +30,7 @@ import org.apache.ambari.server.actionmanager.Stage;
 import org.apache.ambari.server.agent.ExecutionCommand;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
 import org.apache.ambari.server.configuration.Configuration;
+import org.apache.ambari.server.controller.internal.RequestOperationLevel;
 import org.apache.ambari.server.controller.internal.RequestResourceFilter;
 import org.apache.ambari.server.metadata.ActionMetadata;
 import org.apache.ambari.server.state.Cluster;
@@ -188,11 +189,18 @@ public class AmbariCustomCommandExecutionHelper {
       sb.append(" ");
       sb.append(resourceFilter.getServiceName());
     }
+
     if (resourceFilter.getComponentName() != null
         && !resourceFilter.getComponentName().equals("")) {
       sb.append("/");
       sb.append(resourceFilter.getComponentName());
     }
+
+    RequestOperationLevel level = actionRequest.getOperationLevel();
+    if (level != null) {
+      sb.append("op_lvl: " + level.getLevel().toString());
+    }
+
     return sb.toString();
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
index 6c88429..bdfd436 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
@@ -82,6 +82,7 @@ import static org.apache.ambari.server.agent.ExecutionCommand.KeyNames.STACK_VER
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
 import org.apache.ambari.server.configuration.Configuration;
 import org.apache.ambari.server.controller.internal.RequestResourceFilter;
+import org.apache.ambari.server.controller.internal.RequestOperationLevel;
 import org.apache.ambari.server.controller.internal.RequestStageContainer;
 import org.apache.ambari.server.controller.internal.URLStreamProvider;
 import org.apache.ambari.server.customactions.ActionDefinition;
@@ -1281,15 +1282,11 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
       commandParams = new TreeMap<String, String>();
     }
     commandParams.put(SCHEMA_VERSION, serviceInfo.getSchemaVersion());
-
-
-    // Get command script info for custom command/custom action
+    String commandTimeout = configs.getDefaultAgentTaskTimeout();
     /*
-     * TODO: Custom actions are not supported yet, that's why we just pass
-     * component main commandScript to agent. This script is only used for
-     * default commads like INSTALL/STOP/START/CONFIGURE
+     * This script is only used for
+     * default commads like INSTALL/STOP/START
      */
-    String commandTimeout = configs.getDefaultAgentTaskTimeout();
     CommandScriptDefinition script = componentInfo.getCommandScript();
     if (serviceInfo.getSchemaVersion().equals(AmbariMetaInfo.SCHEMA_VERSION_2)) {
       if (script != null) {
@@ -1394,26 +1391,33 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
   }
 
   private ActionExecutionContext getActionExecutionContext
-      (ExecuteActionRequest actionRequest) throws AmbariException {
-
+          (ExecuteActionRequest actionRequest) throws AmbariException {
+    RequestOperationLevel operationLevel = actionRequest.getOperationLevel();
     if (actionRequest.isCommand()) {
-      return new ActionExecutionContext(actionRequest.getClusterName(),
-        actionRequest.getCommandName(), actionRequest.getResourceFilters(),
-        actionRequest.getParameters());
-    } else {
+      ActionExecutionContext actionExecutionContext =
+              new ActionExecutionContext(actionRequest.getClusterName(),
+              actionRequest.getCommandName(), actionRequest.getResourceFilters(),
+              actionRequest.getParameters());
+      actionExecutionContext.setOperationLevel(operationLevel);
+      return actionExecutionContext;
+    } else { // If action
 
-    ActionDefinition actionDef = ambariMetaInfo.getActionDefinition(actionRequest.getActionName());
+      ActionDefinition actionDef =
+              ambariMetaInfo.getActionDefinition(actionRequest.getActionName());
 
-    if (actionDef == null) {
-      throw new AmbariException("Action " + actionRequest.getActionName() + " does not exist");
-    }
-
-    return new ActionExecutionContext(actionRequest.getClusterName(),
-      actionRequest.getActionName(), actionRequest.getResourceFilters(),
-      actionRequest.getParameters(), actionDef.getTargetType(),
-      actionDef.getDefaultTimeout(), actionDef.getTargetService(),
-      actionDef.getTargetComponent());
+      if (actionDef == null) {
+        throw new AmbariException(
+                "Action " + actionRequest.getActionName() + " does not exist");
+      }
 
+      ActionExecutionContext actionExecutionContext =
+              new ActionExecutionContext(actionRequest.getClusterName(),
+              actionRequest.getActionName(), actionRequest.getResourceFilters(),
+              actionRequest.getParameters(), actionDef.getTargetType(),
+              actionDef.getDefaultTimeout(), actionDef.getTargetService(),
+              actionDef.getTargetComponent());
+      actionExecutionContext.setOperationLevel(operationLevel);
+      return actionExecutionContext;
     }
   }
 
@@ -1503,7 +1507,8 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
                       nowTimestamp,
                       scHost.getDesiredStackVersion().getStackId());
                 } else if (oldSchState == State.STARTED
-                    || oldSchState == State.INSTALLED
+// TODO: oldSchState == State.INSTALLED is always false, looks like a bug
+//                    || oldSchState == State.INSTALLED
                     || oldSchState == State.STOPPING) {
                   roleCommand = RoleCommand.STOP;
                   event = new ServiceComponentHostStopEvent(
@@ -2045,6 +2050,11 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
     return serviceName;
   }
 
+
+  /**
+   * Checks if assigning new state does not require performing
+   * any additional actions
+   */
   private boolean isDirectTransition(State oldState, State newState) {
     switch (newState) {
       case INSTALLED:
@@ -2228,7 +2238,7 @@ public class AmbariManagementControllerImpl implements AmbariManagementControlle
               = new RequestResourceFilter(serviceName, "RESOURCEMANAGER", null);
         ExecuteActionRequest actionRequest = new ExecuteActionRequest(
               clusterName, "DECOMMISSION", null,
-              Collections.singletonList(resourceFilter), params);
+              Collections.singletonList(resourceFilter), null, params);
         response = createAction(actionRequest, requestProperties);
       }
     }

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
index 3b5afcd..5e42276 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
@@ -17,6 +17,7 @@
  */
 package org.apache.ambari.server.controller;
 
+import org.apache.ambari.server.controller.internal.RequestOperationLevel;
 import org.apache.ambari.server.controller.internal.RequestResourceFilter;
 
 import java.util.ArrayList;
@@ -31,18 +32,21 @@ public class ExecuteActionRequest {
   private final String clusterName;
   private final String commandName;
   private final List<RequestResourceFilter> resourceFilters;
+  private RequestOperationLevel operationLevel = null;
   private String actionName;
   private Map<String, String> parameters;
 
   public ExecuteActionRequest(String clusterName, String commandName,
                               String actionName,
                               List<RequestResourceFilter> resourceFilters,
+                              RequestOperationLevel operationLevel,
                               Map<String, String> parameters) {
     this(clusterName, commandName, parameters);
     this.actionName = actionName;
     if (resourceFilters != null) {
       this.resourceFilters.addAll(resourceFilters);
     }
+    this.operationLevel = operationLevel;
   }
 
   /**
@@ -76,6 +80,10 @@ public class ExecuteActionRequest {
     return resourceFilters;
   }
 
+  public RequestOperationLevel getOperationLevel() {
+    return operationLevel;
+  }
+
   public Map<String, String> getParameters() {
     return parameters;
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/MaintenanceStateHelper.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/MaintenanceStateHelper.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/MaintenanceStateHelper.java
index 23583b5..3e4b149 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/MaintenanceStateHelper.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/MaintenanceStateHelper.java
@@ -137,7 +137,6 @@ public class MaintenanceStateHelper {
    * {@link MaintenanceState#IMPLIED_FROM_SERVICE_AND_HOST})
    */
   public Set<Map<String, String>> getMaintenanceHostComponents(Clusters clusters, Cluster cluster) throws AmbariException {
-    
     Set<Map<String, String>> set = new HashSet<Map<String, String>>();
 
     Map<String, Host> hosts = clusters.getHostsForCluster(cluster.getClusterName());
@@ -187,7 +186,8 @@ public class MaintenanceStateHelper {
     for (String clusterName : clusterNames) {
       ExecuteActionRequest actionRequest = new ExecuteActionRequest(
         clusterName, null, NAGIOS_ACTION_NAME,
-        Collections.singletonList(resourceFilter), params);
+        Collections.singletonList(resourceFilter),
+        null, params);
       
       if (null == response) {
         response = amc.createAction(actionRequest, requestProperties);
@@ -200,45 +200,41 @@ public class MaintenanceStateHelper {
    * Determine based on the requesting Resource level and the state of the
    * operand whether to allow operations on it.
    *
-   * @param sourceType Request Source: {CLUSTER, SERVICE, HOSTCOMPONENT, HOST}
+   * @param operationLevel Request Source: {CLUSTER, SERVICE, HOSTCOMPONENT, HOST}
    * @param sch HostComponent which is the operand of the operation
    * @return
    * @throws AmbariException
    */
-  public boolean isOperationAllowed(Resource.Type sourceType,
+  public boolean isOperationAllowed(Resource.Type operationLevel,
                                     ServiceComponentHost sch) throws AmbariException {
     MaintenanceState maintenanceState = sch.getMaintenanceState();
 
-    if (sourceType.equals(Resource.Type.Cluster)) {
-
-      if (maintenanceState.equals(MaintenanceState.OFF)) {
-        return true;
-      }
-
-    } else if (sourceType.equals(Resource.Type.Service)) {
-
-      if (maintenanceState.equals(MaintenanceState.IMPLIED_FROM_SERVICE)
-          || maintenanceState.equals(MaintenanceState.OFF)) {
-        return true;
-      }
-
-    } else if (sourceType.equals(Resource.Type.Host)) {
-
-      if (maintenanceState.equals(MaintenanceState.IMPLIED_FROM_HOST)
-          || maintenanceState.equals(MaintenanceState.OFF)) {
+    switch (operationLevel.getInternalType()) {
+      case Cluster:
+          if (maintenanceState.equals(MaintenanceState.OFF)) {
+            return true;
+          }
+          break;
+      case Service:
+        if (maintenanceState.equals(MaintenanceState.IMPLIED_FROM_SERVICE)
+                || maintenanceState.equals(MaintenanceState.OFF)) {
+          return true;
+        }
+        break;
+      case Host:
+        if (maintenanceState.equals(MaintenanceState.IMPLIED_FROM_HOST)
+                || maintenanceState.equals(MaintenanceState.OFF)) {
+          return true;
+        }
+        break;
+      case HostComponent: {
         return true;
       }
-
-    } else if (sourceType.equals(Resource.Type.HostComponent)) {
-
-      return true;
-
-    } else {
-      LOG.warn("Unsupported Resource type, type = " + sourceType);
+      default:
+        LOG.warn("Unsupported Resource type, type = " + operationLevel);
+        break;
     }
-
     return false;
   }
 
-
 }

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestOperationLevel.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestOperationLevel.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestOperationLevel.java
new file mode 100644
index 0000000..a74b8a1
--- /dev/null
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestOperationLevel.java
@@ -0,0 +1,147 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.ambari.server.controller.internal;
+
+import org.apache.ambari.server.controller.spi.Resource;
+
+/**
+ * Operation level is specified along with some requests. It identifies
+ * the logical level, at which the operation is executed.
+ */
+public class RequestOperationLevel {
+
+  /**
+   * Conversion table is used to convert user input into our internal names
+   * of resources, defined at
+   * org.apache.ambari.server.controller.spi.Resource.Type
+    */
+  private static final String [][] LEVEL_ALIASES= new String [][]{
+    // FORMAT: <external alias> , <internal alias>
+    {"CLUSTER", "Cluster"},
+    {"SERVICE", "Service"},
+    {"HOST", "Host"},
+    {"HOST_COMPONENT", "HostComponent"},
+  };
+
+  private static final int ALIAS_COLUMN = 0;
+  private static final int INTERNAL_NAME_COLUMN = 1;
+
+  /**
+   * Converts external operation level alias to an internal name
+   */
+  public static String getInternalLevelName(String external)
+          throws IllegalArgumentException{
+    String refinedAlias = external.trim().toUpperCase();
+    for (String [] pair : LEVEL_ALIASES) {
+      if (pair[ALIAS_COLUMN].equals(refinedAlias)) {
+        return pair[INTERNAL_NAME_COLUMN];
+      }
+    }
+    String message = String.format("Unknown operation level %s", external);
+    throw new IllegalArgumentException(message);
+  }
+
+  /**
+   * Converts internal operation level name to an external alias
+   */
+  public static String getExternalLevelName(String internal) {
+    for (String [] pair : LEVEL_ALIASES) {
+      if (pair[INTERNAL_NAME_COLUMN].equals(internal)) {
+        return pair[ALIAS_COLUMN];
+      }
+    }
+    // That should never happen
+    String message = String.format("Unknown internal " +
+            "operation level name %s", internal);
+    throw new IllegalArgumentException(message);
+  }
+
+  public RequestOperationLevel(Resource.Type level, String clusterName,
+                               String serviceName, String hostComponentName,
+                               String hostName) {
+    this.level = level;
+    this.clusterName = clusterName;
+    this.serviceName = serviceName;
+    this.hostComponentName = hostComponentName;
+    this.hostName = hostName;
+  }
+
+  /**
+   * Valid values are Cluster, Service, Host and HostComponent. Component level
+   * is identical to Service level, and that's why it is not supported
+   * as a standalone level.
+   */
+  private Resource.Type level;
+
+  // Fields below are not used as of now and reserved for future use
+
+  /**
+   * Source cluster for request. Specified for all requests
+   */
+  private String clusterName;
+
+  /**
+   * Source service for request. Specified for Service-level
+   * and HostComponent-level requests.
+   */
+  private String serviceName;
+
+  /**
+   * Source host component for request. Specified for
+   * HostComponent-level requests.
+   */
+  private String hostComponentName;
+
+  /**
+   * Source host for request. Specified for Host-level and
+   * HostComponent-level requests.
+   */
+  private String hostName;
+
+
+  public Resource.Type getLevel() {
+    return level;
+  }
+
+  public String getClusterName() {
+    return clusterName;
+  }
+
+  public String getServiceName() {
+    return serviceName;
+  }
+
+  public String getHostComponentName() {
+    return hostComponentName;
+  }
+
+  public String getHostName() {
+    return hostName;
+  }
+
+  @Override
+  public String toString() {
+    return "RequestOperationLevel{" +
+            "level=" + level +
+            ", clusterName='" + clusterName + '\'' +
+            ", serviceName='" + serviceName + '\'' +
+            ", hostComponentName='" + hostComponentName + '\'' +
+            ", hostName='" + hostName + '\'' +
+            '}';
+  }
+}

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestResourceProvider.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestResourceProvider.java b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestResourceProvider.java
index 36def40..3d76b52 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestResourceProvider.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestResourceProvider.java
@@ -62,6 +62,7 @@ public class RequestResourceProvider extends AbstractControllerResourceProvider
   protected static final String REQUEST_TYPE_ID = "Requests/type";
   protected static final String REQUEST_INPUTS_ID = "Requests/inputs";
   protected static final String REQUEST_RESOURCE_FILTER_ID = "Requests/resource_filters";
+  protected static final String REQUEST_OPERATION_LEVEL_ID = "Requests/operation_level";
   protected static final String REQUEST_CREATE_TIME_ID = "Requests/create_time";
   protected static final String REQUEST_START_TIME_ID = "Requests/start_time";
   protected static final String REQUEST_END_TIME_ID = "Requests/end_time";
@@ -82,6 +83,15 @@ public class RequestResourceProvider extends AbstractControllerResourceProvider
       new HashSet<String>(Arrays.asList(new String[]{
           REQUEST_ID_PROPERTY_ID}));
 
+  /**
+   * Operation level-related parameters
+   */
+  protected static final String OPERATION_LEVEL_ID = "operation_level/level";
+  protected static final String OPERATION_CLUSTER_ID = "operation_level/cluster_name";
+  protected static final String OPERATION_SERVICE_ID = "operation_level/service_name";
+  protected static final String OPERATION_HOSTCOMPONENT_ID = "operation_level/hostcomponent_name";
+  protected static final String OPERATION_HOST_ID = "operation_level/host_name";
+
   // ----- Constructors ----------------------------------------------------
 
   /**
@@ -171,7 +181,8 @@ public class RequestResourceProvider extends AbstractControllerResourceProvider
 
   // Get request to execute an action/command
   @SuppressWarnings("unchecked")
-  private ExecuteActionRequest getActionRequest(Request request) {
+  private ExecuteActionRequest getActionRequest(Request request)
+          throws UnsupportedOperationException {
     Map<String, String> requestInfoProperties = request.getRequestInfoProperties();
     Map<String, Object> propertyMap = request.getProperties().iterator().next();
 
@@ -216,20 +227,49 @@ public class RequestResourceProvider extends AbstractControllerResourceProvider
         ));
       }
     }
+    // Extract operation level property
+    RequestOperationLevel operationLevel = null;
+    Object operationLevelObj = requestInfoProperties.get(OPERATION_LEVEL_ID);
+    if (operationLevelObj != null) {
+      Resource.Type level;
+      try {
+        String internalOpLevelNameStr =
+                RequestOperationLevel.getInternalLevelName(
+                        (String)operationLevelObj);
+        level = Resource.Type.valueOf(internalOpLevelNameStr);
+      } catch (IllegalArgumentException e) {
+        String message = String.format(
+                "Wrong operation level value: %s", operationLevelObj);
+        throw new UnsupportedOperationException(message, e);
+      }
+      if (!requestInfoProperties.containsKey(OPERATION_CLUSTER_ID)) {
+        String message = String.format(
+                "Mandatory key %s for operation level is not specified",
+                OPERATION_CLUSTER_ID);
+        throw new UnsupportedOperationException(message);
+      }
+      String clusterName = requestInfoProperties.get(OPERATION_CLUSTER_ID);
+      String serviceName = requestInfoProperties.get(OPERATION_SERVICE_ID);
+      String hostComponentName =
+              requestInfoProperties.get(OPERATION_HOSTCOMPONENT_ID);
+      String hostName = requestInfoProperties.get(OPERATION_HOST_ID);
+      operationLevel = new RequestOperationLevel(level, clusterName,
+              serviceName, hostComponentName, hostName);
+    }
 
     Map<String, String> params = new HashMap<String, String>();
-    String keyPrefix = "/" + INPUTS_ID + "/";
+    String keyPrefix = INPUTS_ID + "/";
     for (String key : requestInfoProperties.keySet()) {
       if (key.startsWith(keyPrefix)) {
         params.put(key.substring(keyPrefix.length()), requestInfoProperties.get(key));
       }
     }
-
     return new ExecuteActionRequest(
       (String) propertyMap.get(REQUEST_CLUSTER_NAME_PROPERTY_ID),
       commandName,
       actionName,
       resourceFilterList,
+      operationLevel,
       params);
   }
 
@@ -311,6 +351,15 @@ public class RequestResourceProvider extends AbstractControllerResourceProvider
     setResourceProperty(resource, REQUEST_TYPE_ID, request.getRequestType(), requestedPropertyIds);
     setResourceProperty(resource, REQUEST_INPUTS_ID, request.getInputs(), requestedPropertyIds);
     setResourceProperty(resource, REQUEST_RESOURCE_FILTER_ID, request.getResourceFilters(), requestedPropertyIds);
+
+    RequestOperationLevel operationLevel = request.getOperationLevel();
+    String opLevelStr = null;
+    if (operationLevel != null) {
+      opLevelStr = RequestOperationLevel.getExternalLevelName(
+              operationLevel.getLevel().toString());
+    }
+    setResourceProperty(resource, REQUEST_OPERATION_LEVEL_ID, opLevelStr, requestedPropertyIds);
+
     setResourceProperty(resource, REQUEST_CREATE_TIME_ID, request.getCreateTime(), requestedPropertyIds);
     setResourceProperty(resource, REQUEST_START_TIME_ID, request.getStartTime(), requestedPropertyIds);
     setResourceProperty(resource, REQUEST_END_TIME_ID, request.getEndTime(), requestedPropertyIds);
@@ -377,71 +426,4 @@ public class RequestResourceProvider extends AbstractControllerResourceProvider
     return resource;
   }
 
-  // Get a request resource from the given set of host role commands.
-  private Resource getRequestResource(String clusterName,
-                                      Long requestId,
-                                      String context,
-                                      Set<HostRoleCommand> commands,
-                                      Set<String> requestedPropertyIds) {
-    Resource resource = new ResourceImpl(Resource.Type.Request);
-
-    setResourceProperty(resource, REQUEST_CLUSTER_NAME_PROPERTY_ID, clusterName, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_ID_PROPERTY_ID, requestId, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_CONTEXT_ID, context, requestedPropertyIds);
-
-    int taskCount = commands.size();
-    int completedTaskCount = 0;
-    int queuedTaskCount = 0;
-    int pendingTaskCount = 0;
-    int failedTaskCount = 0;
-    int abortedTaskCount = 0;
-    int timedOutTaskCount = 0;
-
-    for (HostRoleCommand hostRoleCommand : commands) {
-      HostRoleStatus status = hostRoleCommand.getStatus();
-      if (status.isCompletedState()) {
-        completedTaskCount++;
-
-        switch (status) {
-          case ABORTED:
-            abortedTaskCount++;
-            break;
-          case FAILED:
-            failedTaskCount++;
-            break;
-          case TIMEDOUT:
-            timedOutTaskCount++;
-            break;
-        }
-      } else if (status.equals(HostRoleStatus.QUEUED)) {
-        queuedTaskCount++;
-      } else if (status.equals(HostRoleStatus.PENDING)) {
-        pendingTaskCount++;
-      }
-    }
-
-    int inProgressTaskCount = taskCount - completedTaskCount - queuedTaskCount - pendingTaskCount;
-
-    // determine request status
-    HostRoleStatus requestStatus = failedTaskCount > 0 ? HostRoleStatus.FAILED :
-        abortedTaskCount > 0 ? HostRoleStatus.ABORTED :
-            timedOutTaskCount > 0 ? HostRoleStatus.TIMEDOUT :
-                inProgressTaskCount > 0 ? HostRoleStatus.IN_PROGRESS :
-                    completedTaskCount == taskCount ? HostRoleStatus.COMPLETED :
-                        HostRoleStatus.PENDING;
-    double progressPercent =
-        ((queuedTaskCount * 0.09 + inProgressTaskCount * 0.35 + completedTaskCount) / (double) taskCount) * 100.0;
-
-    setResourceProperty(resource, REQUEST_STATUS_PROPERTY_ID, requestStatus.toString(), requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_TASK_CNT_ID, taskCount, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_FAILED_TASK_CNT_ID, failedTaskCount, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_ABORTED_TASK_CNT_ID, abortedTaskCount, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_TIMED_OUT_TASK_CNT_ID, timedOutTaskCount, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_QUEUED_TASK_CNT_ID, queuedTaskCount, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_COMPLETED_TASK_CNT_ID, completedTaskCount, requestedPropertyIds);
-    setResourceProperty(resource, REQUEST_PROGRESS_PERCENT_ID, progressPercent, requestedPropertyIds);
-
-    return resource;
-  }
-
 }

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/ClusterStateEntity.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/ClusterStateEntity.java b/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/ClusterStateEntity.java
index 14f0d55..d955a95 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/ClusterStateEntity.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/ClusterStateEntity.java
@@ -66,7 +66,7 @@ public class ClusterStateEntity {
     this.currentStackVersion = currentStackVersion;
   }
 
-    @Override
+  @Override
   public boolean equals(Object o) {
     if (this == o) return true;
     if (o == null || getClass() != o.getClass()) return false;

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestEntity.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestEntity.java b/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestEntity.java
index e7098d2..f80ac7d 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestEntity.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestEntity.java
@@ -32,6 +32,7 @@ import javax.persistence.JoinColumn;
 import javax.persistence.Lob;
 import javax.persistence.ManyToOne;
 import javax.persistence.OneToMany;
+import javax.persistence.OneToOne;
 import javax.persistence.Table;
 import java.util.Collection;
 
@@ -89,6 +90,9 @@ public class RequestEntity {
   @OneToMany(mappedBy = "requestEntity", cascade = CascadeType.ALL)
   private Collection<RequestResourceFilterEntity> resourceFilterEntities;
 
+  @OneToOne(mappedBy = "requestEntity", cascade = {CascadeType.ALL})
+  private RequestOperationLevelEntity requestOperationLevel;
+
   @ManyToOne(cascade = {CascadeType.MERGE})
   @JoinColumn(name = "cluster_id", referencedColumnName = "cluster_id")
   private ClusterEntity cluster;
@@ -181,6 +185,14 @@ public class RequestEntity {
     this.resourceFilterEntities = resourceFilterEntities;
   }
 
+  public RequestOperationLevelEntity getRequestOperationLevel() {
+    return requestOperationLevel;
+  }
+
+  public void setRequestOperationLevel(RequestOperationLevelEntity operationLevel) {
+    this.requestOperationLevel = operationLevel;
+  }
+
   public void setClusterId(Long clusterId) {
     this.clusterId = clusterId;
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestOperationLevelEntity.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestOperationLevelEntity.java b/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestOperationLevelEntity.java
new file mode 100644
index 0000000..b7b3133
--- /dev/null
+++ b/ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestOperationLevelEntity.java
@@ -0,0 +1,141 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.ambari.server.orm.entities;
+
+import org.apache.ambari.server.controller.spi.Resource;
+
+import javax.persistence.Basic;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToOne;
+import javax.persistence.Table;
+import javax.persistence.TableGenerator;
+
+@Entity
+@Table(name = "requestoperationlevel")
+@TableGenerator(name = "operation_level_id_generator",
+  table = "ambari_sequences", pkColumnName = "sequence_name", valueColumnName = "value"
+  , pkColumnValue = "operation_level_id_seq"
+  , initialValue = 1
+  , allocationSize = 1
+)
+public class RequestOperationLevelEntity {
+
+  @Id
+  @Column(name = "operation_level_id", nullable = false, insertable = true, updatable = true)
+  @GeneratedValue(strategy = GenerationType.TABLE, generator = "operation_level_id_generator")
+  private Long operationLevelId;
+
+  @Column(name = "request_id", nullable = false, insertable = true, updatable = true)
+  private Long requestId;
+
+  @OneToOne
+  @JoinColumn(name = "request_id", referencedColumnName = "request_id", nullable = false, insertable = false, updatable = false)
+  private RequestEntity requestEntity;
+
+  public Long getOperationLevelId() {
+    return operationLevelId;
+  }
+
+  public void setOperationLevelId(Long operationLevelId) {
+    this.operationLevelId = operationLevelId;
+  }
+
+  @Column(name = "level_name")
+  @Basic
+  private String level;
+
+  @Column(name = "cluster_name")
+  @Basic
+  private String clusterName;
+
+  @Column(name = "service_name")
+  @Basic
+  private String serviceName;
+
+  @Column(name = "host_component_name")
+  @Basic
+  private String hostComponentName;
+
+  @Column(name = "host_name")
+  @Basic
+  private String hostName;
+
+  public String getLevel() {
+    return level;
+  }
+
+  public void setLevel(String level) {
+    this.level = level;
+  }
+
+  public String getClusterName() {
+    return clusterName;
+  }
+
+  public void setClusterName(String clusterName) {
+    this.clusterName = clusterName;
+  }
+
+  public String getServiceName() {
+    return serviceName;
+  }
+
+  public void setServiceName(String serviceName) {
+    this.serviceName = serviceName;
+  }
+
+  public String getHostComponentName() {
+    return hostComponentName;
+  }
+
+  public void setHostComponentName(String hostComponentName) {
+    this.hostComponentName = hostComponentName;
+  }
+
+  public String getHostName() {
+    return hostName;
+  }
+
+  public void setHostName(String hostName) {
+    this.hostName = hostName;
+  }
+
+  public Long getRequestId() {
+    return requestId;
+  }
+
+  public void setRequestId(Long requestId) {
+    this.requestId = requestId;
+  }
+
+  public RequestEntity getRequestEntity() {
+    return requestEntity;
+  }
+
+  public void setRequestEntity(RequestEntity request) {
+    this.requestEntity = request;
+  }
+}

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/upgrade/SchemaUpgradeHelper.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/upgrade/SchemaUpgradeHelper.java b/ambari-server/src/main/java/org/apache/ambari/server/upgrade/SchemaUpgradeHelper.java
index d04dc26..51d64d3 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/upgrade/SchemaUpgradeHelper.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/upgrade/SchemaUpgradeHelper.java
@@ -164,6 +164,7 @@ public class SchemaUpgradeHelper {
       catalogBinder.addBinding().to(UpgradeCatalog150.class);
       catalogBinder.addBinding().to(UpgradeCatalog151.class);
       catalogBinder.addBinding().to(UpgradeCatalog160.class);
+      catalogBinder.addBinding().to(UpgradeCatalog161.class);
     }
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog160.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog160.java b/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog160.java
index c86c3ed..5c91c0d 100644
--- a/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog160.java
+++ b/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog160.java
@@ -78,7 +78,7 @@ public class UpgradeCatalog160 extends AbstractUpgradeCatalog {
       restartRequiredColumn.setDefaultValue(Boolean.FALSE);
     }
     dbAccessor.addColumn("hostcomponentdesiredstate",
-      restartRequiredColumn);
+      new DBAccessor.DBColumnInfo("restart_required", Boolean.class, 1, 0, false));
 
     // ========================================================================
     // Add constraints
@@ -98,7 +98,7 @@ public class UpgradeCatalog160 extends AbstractUpgradeCatalog {
   protected void executeDMLUpdates() throws AmbariException, SQLException {
     String dbType = getDbType();
 
-    // Add new sequences for view entity
+    //add new sequences for view entity
     String valueColumnName = "\"value\"";
     if (Configuration.ORACLE_DB_NAME.equals(dbType) || Configuration.MYSQL_DB_NAME.equals(dbType)) {
       valueColumnName = "value";

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog161.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog161.java b/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog161.java
new file mode 100644
index 0000000..8b4a199
--- /dev/null
+++ b/ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog161.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ambari.server.upgrade;
+
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import org.apache.ambari.server.AmbariException;
+import org.apache.ambari.server.configuration.Configuration;
+
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.apache.ambari.server.orm.DBAccessor.DBColumnInfo;
+
+/**
+ * Upgrade catalog for version 1.6.1.
+ */
+public class UpgradeCatalog161 extends AbstractUpgradeCatalog {
+
+  // ----- Constructors ------------------------------------------------------
+
+  @Inject
+  public UpgradeCatalog161(Injector injector) {
+    super(injector);
+  }
+
+
+  // ----- AbstractUpgradeCatalog --------------------------------------------
+
+  @Override
+  protected void executeDDLUpdates() throws AmbariException, SQLException {
+    List<DBColumnInfo> columns;
+
+    // Operation level
+    columns = new ArrayList<DBColumnInfo>();
+    columns.add(new DBColumnInfo("operation_level_id", Long.class, null, null, false));
+    columns.add(new DBColumnInfo("request_id", Long.class, null, null, false));
+    columns.add(new DBColumnInfo("level_name", String.class, 255, null, true));
+    columns.add(new DBColumnInfo("cluster_name", String.class, 255, null, true));
+    columns.add(new DBColumnInfo("service_name", String.class, 255, null, true));
+    columns.add(new DBColumnInfo("host_component_name", String.class, 255, null, true));
+    columns.add(new DBColumnInfo("host_name", String.class, 255, null, true));
+
+    dbAccessor.createTable("requestoperationlevel", columns, "operation_level_id");
+
+    // ========================================================================
+    // Add constraints
+    dbAccessor.addFKConstraint("requestoperationlevel", "FK_req_op_level_req_id",
+            "request_id", "request", "request_id", true);
+  }
+
+
+  // ----- UpgradeCatalog ----------------------------------------------------
+
+  @Override
+  protected void executeDMLUpdates() throws AmbariException, SQLException {
+    String dbType = getDbType();
+
+    String valueColumnName = "\"value\"";
+    if (Configuration.ORACLE_DB_NAME.equals(dbType) || Configuration.MYSQL_DB_NAME.equals(dbType)) {
+      valueColumnName = "value";
+    }
+    //add new sequences for operation level
+    dbAccessor.executeQuery("INSERT INTO ambari_sequences(sequence_name, " + valueColumnName + ") " +
+            "VALUES('operation_level_id_seq', 1)", true);
+  }
+
+  @Override
+  public String getTargetVersion() {
+    return "1.6.1";
+  }
+}

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/resources/Ambari-DDL-MySQL-CREATE.sql
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/Ambari-DDL-MySQL-CREATE.sql b/ambari-server/src/main/resources/Ambari-DDL-MySQL-CREATE.sql
index bac1615..ce01146 100644
--- a/ambari-server/src/main/resources/Ambari-DDL-MySQL-CREATE.sql
+++ b/ambari-server/src/main/resources/Ambari-DDL-MySQL-CREATE.sql
@@ -44,6 +44,7 @@ CREATE TABLE role_success_criteria (role VARCHAR(255) NOT NULL, request_id BIGIN
 CREATE TABLE stage (stage_id BIGINT NOT NULL, request_id BIGINT NOT NULL, cluster_id BIGINT, log_info VARCHAR(255) NOT NULL, request_context VARCHAR(255), cluster_host_info LONGBLOB, PRIMARY KEY (stage_id, request_id));
 CREATE TABLE request (request_id BIGINT NOT NULL, cluster_id BIGINT, request_schedule_id BIGINT, command_name VARCHAR(255), create_time BIGINT NOT NULL, end_time BIGINT NOT NULL, inputs LONGBLOB, request_context VARCHAR(255), request_type VARCHAR(255), start_time BIGINT NOT NULL, status VARCHAR(255), PRIMARY KEY (request_id));
 CREATE TABLE requestresourcefilter (filter_id BIGINT NOT NULL, request_id BIGINT NOT NULL, service_name VARCHAR(255), component_name VARCHAR(255), hosts LONGBLOB, PRIMARY KEY (filter_id));
+CREATE TABLE requestoperationlevel (operation_level_id BIGINT NOT NULL, request_id BIGINT NOT NULL, level_name VARCHAR(255), cluster_name VARCHAR(255), service_name VARCHAR(255), host_component_name VARCHAR(255), host_name VARCHAR(255), PRIMARY KEY (operation_level_id));
 CREATE TABLE key_value_store (`key` VARCHAR(255), `value` LONGTEXT, PRIMARY KEY (`key`));
 CREATE TABLE clusterconfigmapping (type_name VARCHAR(255) NOT NULL, create_timestamp BIGINT NOT NULL, cluster_id BIGINT NOT NULL, selected INTEGER NOT NULL DEFAULT 0, version_tag VARCHAR(255) NOT NULL, user_name VARCHAR(255) NOT NULL DEFAULT '_db', PRIMARY KEY (type_name, create_timestamp, cluster_id));
 CREATE TABLE hostconfigmapping (create_timestamp BIGINT NOT NULL, host_name VARCHAR(255) NOT NULL, cluster_id BIGINT NOT NULL, type_name VARCHAR(255) NOT NULL, selected INTEGER NOT NULL DEFAULT 0, service_name VARCHAR(255), version_tag VARCHAR(255) NOT NULL, user_name VARCHAR(255) NOT NULL DEFAULT '_db', PRIMARY KEY (create_timestamp, host_name, cluster_id, type_name));
@@ -106,6 +107,7 @@ ALTER TABLE hostgroup_component ADD CONSTRAINT FK_hgc_blueprint_name FOREIGN KEY
 ALTER TABLE blueprint_configuration ADD CONSTRAINT FK_cfg_blueprint_name FOREIGN KEY (blueprint_name) REFERENCES blueprint(blueprint_name);
 ALTER TABLE hostgroup_configuration ADD CONSTRAINT FK_hg_cfg_bp_hg_name FOREIGN KEY (blueprint_name, hostgroup_name) REFERENCES hostgroup (blueprint_name, name);
 ALTER TABLE requestresourcefilter ADD CONSTRAINT FK_reqresfilter_req_id FOREIGN KEY (request_id) REFERENCES request (request_id);
+ALTER TABLE requestoperationlevel ADD CONSTRAINT FK_req_op_level_req_id FOREIGN KEY (request_id) REFERENCES request (request_id);
 ALTER TABLE viewparameter ADD CONSTRAINT FK_viewparam_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE viewresource ADD CONSTRAINT FK_viewres_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE viewinstance ADD CONSTRAINT FK_viewinst_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
@@ -121,6 +123,7 @@ INSERT INTO ambari_sequences(sequence_name, value) values ('configgroup_id_seq',
 INSERT INTO ambari_sequences(sequence_name, value) values ('requestschedule_id_seq', 1);
 INSERT INTO ambari_sequences(sequence_name, value) values ('resourcefilter_id_seq', 1);
 INSERT INTO ambari_sequences(sequence_name, value) values ('viewentity_id_seq', 0);
+INSERT INTO ambari_sequences(sequence_name, value) values ('operation_level_id_seq', 1);
 
 insert into roles(role_name)
   select 'admin'

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/resources/Ambari-DDL-Oracle-CREATE.sql
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/Ambari-DDL-Oracle-CREATE.sql b/ambari-server/src/main/resources/Ambari-DDL-Oracle-CREATE.sql
index 2b7f4d5..c0472bd 100644
--- a/ambari-server/src/main/resources/Ambari-DDL-Oracle-CREATE.sql
+++ b/ambari-server/src/main/resources/Ambari-DDL-Oracle-CREATE.sql
@@ -34,6 +34,7 @@ CREATE TABLE role_success_criteria (role VARCHAR2(255) NOT NULL, request_id NUMB
 CREATE TABLE stage (stage_id NUMBER(19) NOT NULL, request_id NUMBER(19) NOT NULL, cluster_id NUMBER(19) NULL, log_info VARCHAR2(255) NULL, request_context VARCHAR2(255) NULL, cluster_host_info BLOB NOT NULL, PRIMARY KEY (stage_id, request_id));
 CREATE TABLE request (request_id NUMBER(19) NOT NULL, cluster_id NUMBER(19), request_schedule_id NUMBER(19), command_name VARCHAR(255), create_time NUMBER(19) NOT NULL, end_time NUMBER(19) NOT NULL, inputs BLOB, request_context VARCHAR(255), request_type VARCHAR(255), start_time NUMBER(19) NOT NULL, status VARCHAR(255), PRIMARY KEY (request_id));
 CREATE TABLE requestresourcefilter (filter_id NUMBER(19) NOT NULL, request_id NUMBER(19) NOT NULL, service_name VARCHAR2(255), component_name VARCHAR2(255), hosts BLOB, PRIMARY KEY (filter_id));
+CREATE TABLE requestoperationlevel (operation_level_id NUMBER(19) NOT NULL, request_id NUMBER(19) NOT NULL, level_name VARCHAR2(255), cluster_name VARCHAR2(255), service_name VARCHAR2(255), host_component_name VARCHAR2(255), host_name VARCHAR2(255), PRIMARY KEY (operation_level_id));
 CREATE TABLE key_value_store ("key" VARCHAR2(255) NOT NULL, "value" CLOB NULL, PRIMARY KEY ("key"));
 CREATE TABLE clusterconfigmapping (type_name VARCHAR2(255) NOT NULL, create_timestamp NUMBER(19) NOT NULL, cluster_id NUMBER(19) NOT NULL, selected NUMBER(10) NOT NULL, version_tag VARCHAR2(255) NOT NULL, user_name VARCHAR(255) DEFAULT '_db', PRIMARY KEY (type_name, create_timestamp, cluster_id));
 CREATE TABLE hostconfigmapping (create_timestamp NUMBER(19) NOT NULL, host_name VARCHAR2(255) NOT NULL, cluster_id NUMBER(19) NOT NULL, type_name VARCHAR2(255) NOT NULL, selected NUMBER(10) NOT NULL, service_name VARCHAR2(255) NULL, version_tag VARCHAR2(255) NOT NULL, user_name VARCHAR(255) DEFAULT '_db', PRIMARY KEY (create_timestamp, host_name, cluster_id, type_name));
@@ -96,6 +97,7 @@ ALTER TABLE hostgroup_component ADD CONSTRAINT FK_hgc_blueprint_name FOREIGN KEY
 ALTER TABLE blueprint_configuration ADD CONSTRAINT FK_cfg_blueprint_name FOREIGN KEY (blueprint_name) REFERENCES blueprint(blueprint_name);
 ALTER TABLE hostgroup_configuration ADD CONSTRAINT FK_hg_cfg_bp_hg_name FOREIGN KEY (blueprint_name, hostgroup_name) REFERENCES hostgroup(blueprint_name, name);
 ALTER TABLE requestresourcefilter ADD CONSTRAINT FK_reqresfilter_req_id FOREIGN KEY (request_id) REFERENCES request (request_id);
+ALTER TABLE requestoperationlevel ADD CONSTRAINT FK_req_op_level_req_id FOREIGN KEY (request_id) REFERENCES request (request_id);
 ALTER TABLE viewparameter ADD CONSTRAINT FK_viewparam_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE viewresource ADD CONSTRAINT FK_viewres_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE viewinstance ADD CONSTRAINT FK_viewinst_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
@@ -110,6 +112,7 @@ INSERT INTO ambari_sequences(sequence_name, value) values ('configgroup_id_seq',
 INSERT INTO ambari_sequences(sequence_name, value) values ('requestschedule_id_seq', 1);
 INSERT INTO ambari_sequences(sequence_name, value) values ('resourcefilter_id_seq', 1);
 INSERT INTO ambari_sequences(sequence_name, value) values ('viewentity_id_seq', 0);
+INSERT INTO ambari_sequences(sequence_name, value) values ('operation_level_id_seq', 1);
 INSERT INTO metainfo("metainfo_key", "metainfo_value") values ('version', '${ambariVersion}');
 
 insert into Roles(role_name)

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/resources/Ambari-DDL-Postgres-CREATE.sql
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/Ambari-DDL-Postgres-CREATE.sql b/ambari-server/src/main/resources/Ambari-DDL-Postgres-CREATE.sql
index f12299f..5792556 100644
--- a/ambari-server/src/main/resources/Ambari-DDL-Postgres-CREATE.sql
+++ b/ambari-server/src/main/resources/Ambari-DDL-Postgres-CREATE.sql
@@ -55,6 +55,8 @@ CREATE TABLE request (request_id BIGINT NOT NULL, cluster_id BIGINT, command_nam
 
 CREATE TABLE requestresourcefilter (filter_id BIGINT NOT NULL, request_id BIGINT NOT NULL, service_name VARCHAR(255), component_name VARCHAR(255), hosts BYTEA, PRIMARY KEY (filter_id));
 
+CREATE TABLE requestoperationlevel (operation_level_id BIGINT NOT NULL, request_id BIGINT NOT NULL, level_name VARCHAR(255), cluster_name VARCHAR(255), service_name VARCHAR(255), host_component_name VARCHAR(255), host_name VARCHAR(255), PRIMARY KEY (operation_level_id));
+
 CREATE TABLE ClusterHostMapping (cluster_id BIGINT NOT NULL, host_name VARCHAR(255) NOT NULL, PRIMARY KEY (cluster_id, host_name));
 
 CREATE TABLE user_roles (role_name VARCHAR(255) NOT NULL, user_id INTEGER NOT NULL, PRIMARY KEY (role_name, user_id));
@@ -128,6 +130,7 @@ ALTER TABLE hostgroup_component ADD CONSTRAINT FK_hgc_blueprint_name FOREIGN KEY
 ALTER TABLE blueprint_configuration ADD CONSTRAINT FK_cfg_blueprint_name FOREIGN KEY (blueprint_name) REFERENCES blueprint(blueprint_name);
 ALTER TABLE hostgroup_configuration ADD CONSTRAINT FK_hg_cfg_bp_hg_name FOREIGN KEY (blueprint_name, hostgroup_name) REFERENCES hostgroup (blueprint_name, name);
 ALTER TABLE requestresourcefilter ADD CONSTRAINT FK_reqresfilter_req_id FOREIGN KEY (request_id) REFERENCES request (request_id);
+ALTER TABLE requestoperationlevel ADD CONSTRAINT FK_req_op_level_req_id FOREIGN KEY (request_id) REFERENCES request (request_id);
 ALTER TABLE viewparameter ADD CONSTRAINT FK_viewparam_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE viewresource ADD CONSTRAINT FK_viewres_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE viewinstance ADD CONSTRAINT FK_viewinst_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
@@ -151,7 +154,9 @@ BEGIN;
   union all
   select 'resourcefilter_id_seq', 1
   union all
-  select 'viewentity_id_seq', 0;
+  select 'viewentity_id_seq', 0
+  union all
+  select 'operation_level_id_seq', 1;
 
   INSERT INTO Roles (role_name)
   SELECT 'admin'

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/resources/Ambari-DDL-Postgres-EMBEDDED-CREATE.sql
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/Ambari-DDL-Postgres-EMBEDDED-CREATE.sql b/ambari-server/src/main/resources/Ambari-DDL-Postgres-EMBEDDED-CREATE.sql
index cbf8579..8c07e63 100644
--- a/ambari-server/src/main/resources/Ambari-DDL-Postgres-EMBEDDED-CREATE.sql
+++ b/ambari-server/src/main/resources/Ambari-DDL-Postgres-EMBEDDED-CREATE.sql
@@ -85,6 +85,9 @@ GRANT ALL PRIVILEGES ON TABLE ambari.request TO :username;
 CREATE TABLE ambari.requestresourcefilter (filter_id BIGINT NOT NULL, request_id BIGINT NOT NULL, service_name VARCHAR(255), component_name VARCHAR(255), hosts BYTEA, PRIMARY KEY (filter_id));
 GRANT ALL PRIVILEGES ON TABLE ambari.requestresourcefilter TO :username;
 
+CREATE TABLE ambari.requestoperationlevel (operation_level_id BIGINT NOT NULL, request_id BIGINT NOT NULL, level_name VARCHAR(255), cluster_name VARCHAR(255), service_name VARCHAR(255), host_component_name VARCHAR(255), host_name VARCHAR(255), PRIMARY KEY (operation_level_id));
+GRANT ALL PRIVILEGES ON TABLE ambari.requestoperationlevel TO :username;
+
 CREATE TABLE ambari.ClusterHostMapping (cluster_id BIGINT NOT NULL, host_name VARCHAR(255) NOT NULL, PRIMARY KEY (cluster_id, host_name));
 GRANT ALL PRIVILEGES ON TABLE ambari.ClusterHostMapping TO :username;
 
@@ -181,6 +184,7 @@ ALTER TABLE ambari.hostgroup_component ADD CONSTRAINT FK_hgc_blueprint_name FORE
 ALTER TABLE ambari.blueprint_configuration ADD CONSTRAINT FK_cfg_blueprint_name FOREIGN KEY (blueprint_name) REFERENCES ambari.blueprint(blueprint_name);
 ALTER TABLE ambari.hostgroup_configuration ADD CONSTRAINT FK_hg_cfg_bp_hg_name FOREIGN KEY (blueprint_name, hostgroup_name) REFERENCES ambari.hostgroup (blueprint_name, name);
 ALTER TABLE ambari.requestresourcefilter ADD CONSTRAINT FK_reqresfilter_req_id FOREIGN KEY (request_id) REFERENCES ambari.request (request_id);
+ALTER TABLE ambari.requestoperationlevel ADD CONSTRAINT FK_req_op_level_req_id FOREIGN KEY (request_id) REFERENCES ambari.request (request_id);
 ALTER TABLE ambari.viewparameter ADD CONSTRAINT FK_viewparam_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE ambari.viewresource ADD CONSTRAINT FK_viewres_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
 ALTER TABLE ambari.viewinstance ADD CONSTRAINT FK_viewinst_view_name FOREIGN KEY (view_name) REFERENCES viewmain(view_name);
@@ -204,7 +208,9 @@ INSERT INTO ambari.ambari_sequences (sequence_name, "value")
   union all
   select 'resourcefilter_id_seq', 1
   union all
-  select 'viewentity_id_seq', 0;
+  select 'viewentity_id_seq', 0
+  union all
+  select 'operation_level_id_seq', 1;
 
 
 INSERT INTO ambari.Roles (role_name)

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/resources/META-INF/persistence.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/META-INF/persistence.xml b/ambari-server/src/main/resources/META-INF/persistence.xml
index 36cafe2..9f3dcac 100644
--- a/ambari-server/src/main/resources/META-INF/persistence.xml
+++ b/ambari-server/src/main/resources/META-INF/persistence.xml
@@ -46,6 +46,7 @@
     <class>org.apache.ambari.server.orm.entities.HostGroupComponentEntity</class>
     <class>org.apache.ambari.server.orm.entities.HostGroupConfigEntity</class>
     <class>org.apache.ambari.server.orm.entities.RequestResourceFilterEntity</class>
+    <class>org.apache.ambari.server.orm.entities.RequestOperationLevelEntity</class>
     <class>org.apache.ambari.server.orm.entities.ViewEntity</class>
     <class>org.apache.ambari.server.orm.entities.ViewInstanceDataEntity</class>
     <class>org.apache.ambari.server.orm.entities.ViewInstanceEntity</class>

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/main/resources/properties.json
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/properties.json b/ambari-server/src/main/resources/properties.json
index f92d238..a529950 100644
--- a/ambari-server/src/main/resources/properties.json
+++ b/ambari-server/src/main/resources/properties.json
@@ -104,6 +104,7 @@
         "Requests/type",
         "Requests/inputs",
         "Requests/resource_filters",
+        "Requests/operation_level",
         "Requests/create_time",
         "Requests/start_time",
         "Requests/end_time",

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/test/java/org/apache/ambari/server/actionmanager/TestActionDBAccessorImpl.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/actionmanager/TestActionDBAccessorImpl.java b/ambari-server/src/test/java/org/apache/ambari/server/actionmanager/TestActionDBAccessorImpl.java
index 5ad1e77..efcdd9b 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/actionmanager/TestActionDBAccessorImpl.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/actionmanager/TestActionDBAccessorImpl.java
@@ -412,7 +412,7 @@ public class TestActionDBAccessorImpl {
     List<RequestResourceFilter> resourceFilters = new
       ArrayList<RequestResourceFilter>() {{ add(resourceFilter); }};
     ExecuteActionRequest executeActionRequest = new ExecuteActionRequest
-      ("cluster1", null, actionName, resourceFilters, null);
+      ("cluster1", null, actionName, resourceFilters, null, null);
     Request request = new Request(stages, clusters);
     db.persistActions(request);
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/5dff4516/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerTest.java
----------------------------------------------------------------------
diff --git a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerTest.java b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerTest.java
index 2122a8b..96a93c8 100644
--- a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerTest.java
+++ b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerTest.java
@@ -2348,7 +2348,7 @@ public class AmbariManagementControllerTest {
     resourceFilters.add(resourceFilter);
 
     ExecuteActionRequest request = new ExecuteActionRequest(clusterName,
-      "DECOMMISSION", null, resourceFilters, params);
+      "DECOMMISSION", null, resourceFilters, null, params);
 
     Map<String, String> requestProperties = new HashMap<String, String>();
     requestProperties.put(REQUEST_CONTEXT_PROPERTY, "Called from a test");
@@ -2417,7 +2417,7 @@ public class AmbariManagementControllerTest {
       put("included_hosts", "h2");
     }};
     request = new ExecuteActionRequest(clusterName, "DECOMMISSION", null,
-      resourceFilters, params);
+      resourceFilters, null, params);
 
     response = controller.createAction(request,
         requestProperties);
@@ -3807,7 +3807,7 @@ public class AmbariManagementControllerTest {
     List<RequestResourceFilter> resourceFilters = new ArrayList<RequestResourceFilter>();
     resourceFilters.add(resourceFilter);
 
-    ExecuteActionRequest actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    ExecuteActionRequest actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     RequestStatusResponse response = controller.createAction(actionRequest, requestProperties);
     assertEquals(1, response.getTasks().size());
     ShortTaskStatus taskStatus = response.getTasks().get(0);
@@ -3829,7 +3829,7 @@ public class AmbariManagementControllerTest {
     resourceFilters.clear();
     resourceFilter = new RequestResourceFilter("", "", null);
     resourceFilters.add(resourceFilter);
-    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, null, params);
     response = controller.createAction(actionRequest, requestProperties);
     assertEquals(2, response.getTasks().size());
 
@@ -3857,7 +3857,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("", "", hosts);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     response = controller.createAction(actionRequest, requestProperties);
     assertEquals(1, response.getTasks().size());
     taskStatus = response.getTasks().get(0);
@@ -4144,7 +4144,7 @@ public class AmbariManagementControllerTest {
     List<RequestResourceFilter> resourceFilters = new ArrayList<RequestResourceFilter>();
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params);
 
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Unsupported action DECOMMISSION for Service: HDFS and Component: HDFS_CLIENT");
@@ -4152,7 +4152,7 @@ public class AmbariManagementControllerTest {
     resourceFilters.clear();
     resourceFilter = new RequestResourceFilter("HDFS", null, null);
     resourceFilters.add(resourceFilter);
-    actionRequest = new ExecuteActionRequest("c1", null, "DECOMMISSION_DATANODE", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "DECOMMISSION_DATANODE", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action DECOMMISSION_DATANODE does not exist");
 
@@ -4160,7 +4160,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("YARN", "RESOURCEMANAGER", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Service not found, clusterName=c1, serviceName=YARN");
 
@@ -4173,7 +4173,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS", "NAMENODE", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params2);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params2);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Same host cannot be specified for inclusion as well as exclusion. Hosts: [h1]");
 
@@ -4186,7 +4186,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS", "NAMENODE", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params2);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params2);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Component HDFS_CLIENT is not supported for decommissioning.");
 
@@ -4196,7 +4196,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS", "NAMENODE", hosts);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params2);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params2);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Decommission command cannot be issued with target host(s) specified.");
 
@@ -4208,7 +4208,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS", "NAMENODE", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params2);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params2);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Component DATANODE on host h1 cannot be decommissioned as its not in STARTED state");
 
@@ -4216,7 +4216,7 @@ public class AmbariManagementControllerTest {
       put("excluded_hosts", "h1 ");
       put("mark_draining_only", "true");
     }};
-    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, params2);
+    actionRequest = new ExecuteActionRequest("c1", "DECOMMISSION", null, resourceFilters, null, params2);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "mark_draining_only is not a valid parameter for NAMENODE");
 
@@ -4236,16 +4236,16 @@ public class AmbariManagementControllerTest {
         "a4", ActionType.SYSTEM, "", "HIVE", "", "Does file exist",
         TargetHostType.ANY, Short.valueOf("100")));
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", null, null);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", null, null, null);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a1 requires input 'test' that is not provided");
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", null, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", null, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a1 requires input 'dirName' that is not provided");
 
     params.put("dirName", "dirName");
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", null, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", null, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a1 requires explicit target host(s)");
 
@@ -4253,7 +4253,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HIVE", null, null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a2 targets service HIVE that does not match with expected HDFS");
 
@@ -4261,7 +4261,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS", "HDFS_CLIENT", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a2 targets component HDFS_CLIENT that does not match with expected DATANODE");
 
@@ -4269,7 +4269,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS2", "HDFS_CLIENT", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a1 targets service HDFS2 that does not exist");
 
@@ -4277,7 +4277,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HDFS", "HDFS_CLIENT2", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a1 targets component HDFS_CLIENT2 that does not exist");
 
@@ -4285,7 +4285,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("", "HDFS_CLIENT2", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a1 targets component HDFS_CLIENT2 without specifying the target service");
 
@@ -4294,7 +4294,7 @@ public class AmbariManagementControllerTest {
     resourceFilters.add(resourceFilter);
 
     // targets a service that is not a member of the stack (e.g. MR not in HDP-2)
-    actionRequest = new ExecuteActionRequest("c1", null, "a3", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a3", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Action a3 targets service MAPREDUCE that does not exist");
 
@@ -4304,7 +4304,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("", "", hosts);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a2", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Request specifies host h6 but its not a valid host based on the target service=HDFS and component=DATANODE");
 
@@ -4312,7 +4312,7 @@ public class AmbariManagementControllerTest {
     resourceFilter = new RequestResourceFilter("HIVE", "", null);
     resourceFilters.add(resourceFilter);
 
-    actionRequest = new ExecuteActionRequest("c1", null, "a4", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a4", resourceFilters, null, params);
     expectActionCreationErrorWithMessage(actionRequest, requestProperties,
         "Suitable hosts not found, component=, service=HIVE, cluster=c1, actionName=a4");
 
@@ -6174,7 +6174,7 @@ public class AmbariManagementControllerTest {
     resourceFilters.add(resourceFilter1);
     resourceFilters.add(resourceFilter2);
 
-    ExecuteActionRequest actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    ExecuteActionRequest actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     RequestStatusResponse response = null;
     try {
       response = controller.createAction(actionRequest, requestProperties);
@@ -6184,7 +6184,7 @@ public class AmbariManagementControllerTest {
         "allows one resource filter to be specified"));
     }
     resourceFilters.remove(resourceFilter1);
-    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, params);
+    actionRequest = new ExecuteActionRequest("c1", null, "a1", resourceFilters, null, params);
     response = controller.createAction(actionRequest, requestProperties);
 
     assertEquals(1, response.getTasks().size());
@@ -6268,7 +6268,7 @@ public class AmbariManagementControllerTest {
     resourceFilters.add(resourceFilter);
 
     ExecuteActionRequest request = new ExecuteActionRequest("c1",
-      "RESTART", null, resourceFilters, params);
+      "RESTART", null, resourceFilters, null, params);
 
     RequestStatusResponse response = controller.createAction(request, requestProperties);
     Assert.assertEquals(3, response.getTasks().size());
@@ -6297,7 +6297,7 @@ public class AmbariManagementControllerTest {
       new ArrayList<String>() {{ add("h2"); }});
     resourceFilters.add(resourceFilter);
     request = new ExecuteActionRequest("c1", Role.HDFS_SERVICE_CHECK.name(),
-      null, resourceFilters, null);
+      null, resourceFilters, null, null);
     response = controller.createAction(request, requestProperties);
 
     Assert.assertEquals(1, response.getTasks().size());


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