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From shame...@apache.org
Subject [15/50] [abbrv] airavata git commit: Renamed the wrong package name
Date Thu, 26 Mar 2015 17:08:14 GMT
http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/AiravataDefaultParser.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/AiravataDefaultParser.java b/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/AiravataDefaultParser.java
new file mode 100644
index 0000000..644eda6
--- /dev/null
+++ b/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/AiravataDefaultParser.java
@@ -0,0 +1,293 @@
+/*
+ *
+ * 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.airavata.simple.workflow.engine.parser;
+
+import org.airavata.appcatalog.cpi.AppCatalogException;
+import org.airavata.appcatalog.cpi.WorkflowCatalog;
+import org.apache.aiaravata.application.catalog.data.impl.AppCatalogFactory;
+import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
+import org.apache.airavata.model.appcatalog.appinterface.OutputDataObjectType;
+import org.apache.airavata.model.workspace.experiment.Experiment;
+import org.apache.airavata.persistance.registry.jpa.impl.RegistryFactory;
+import org.apache.airavata.registry.cpi.Registry;
+import org.apache.airavata.registry.cpi.RegistryException;
+import org.apache.airavata.registry.cpi.RegistryModelType;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.ApplicationNodeImpl;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.WorkflowInputNode;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.WorkflowInputNodeImpl;
+import org.apache.airavata.simple.workflow.engine.dag.port.OutPortImpl;
+import org.apache.airavata.workflow.model.component.ComponentException;
+import org.apache.airavata.workflow.model.component.system.ConstantComponent;
+import org.apache.airavata.workflow.model.component.system.InputComponent;
+import org.apache.airavata.workflow.model.component.system.S3InputComponent;
+import org.apache.airavata.workflow.model.graph.DataEdge;
+import org.apache.airavata.workflow.model.graph.DataPort;
+import org.apache.airavata.workflow.model.graph.GraphException;
+import org.apache.airavata.workflow.model.graph.Node;
+import org.apache.airavata.workflow.model.graph.impl.NodeImpl;
+import org.apache.airavata.workflow.model.graph.system.OutputNode;
+import org.apache.airavata.workflow.model.graph.system.SystemDataPort;
+import org.apache.airavata.workflow.model.graph.ws.WSNode;
+import org.apache.airavata.workflow.model.graph.ws.WSPort;
+import org.apache.airavata.workflow.model.wf.Workflow;
+import org.apache.airavata.simple.workflow.engine.WorkflowParser;
+import org.apache.airavata.simple.workflow.engine.dag.edge.DirectedEdge;
+import org.apache.airavata.simple.workflow.engine.dag.edge.Edge;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.ApplicationNode;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.WorkflowNode;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.WorkflowOutputNode;
+import org.apache.airavata.simple.workflow.engine.dag.nodes.WorkflowOutputNodeImpl;
+import org.apache.airavata.simple.workflow.engine.dag.port.InPort;
+import org.apache.airavata.simple.workflow.engine.dag.port.InputPortIml;
+import org.apache.airavata.simple.workflow.engine.dag.port.OutPort;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class AiravataDefaultParser implements WorkflowParser {
+
+    private String credentialToken ;
+    private Workflow workflow;
+
+
+    private Experiment experiment;
+    private Map<String, WorkflowNode> wfNodes = new HashMap<String, WorkflowNode>();
+
+
+    public AiravataDefaultParser(String experimentId, String credentialToken) throws RegistryException {
+        this.experiment = getExperiment(experimentId);
+        this.credentialToken = credentialToken;
+    }
+
+    public AiravataDefaultParser(Experiment experiment, String credentialToken) {
+        this.credentialToken = credentialToken;
+        this.experiment = experiment;
+    }
+
+    @Override
+    public List<WorkflowInputNode> parse() throws RegistryException, AppCatalogException,
+            ComponentException, GraphException {
+        return parseWorkflow(getWorkflowFromExperiment(experiment));
+    }
+
+    public List<WorkflowInputNode> parseWorkflow(Workflow workflow) {
+        List<Node> gNodes = getInputNodes(workflow);
+        List<WorkflowInputNode> wfInputNodes = new ArrayList<WorkflowInputNode>();
+        List<PortContainer> portContainers = new ArrayList<PortContainer>();
+        List<InputDataObjectType> experimentInputs = experiment.getExperimentInputs();
+        Map<String,InputDataObjectType> inputDataMap=new HashMap<String, InputDataObjectType>();
+        WorkflowInputNode wfInputNode = null;
+        for (InputDataObjectType dataObjectType : experimentInputs) {
+            inputDataMap.put(dataObjectType.getName(), dataObjectType);
+        }
+        for (Node gNode : gNodes) {
+            wfInputNode = new WorkflowInputNodeImpl(gNode.getID(), gNode.getName());
+            wfInputNode.setInputObject(inputDataMap.get(wfInputNode.getName()));
+            if (wfInputNode.getInputObject() == null) {
+                // TODO: throw an error and exit.
+            }
+            portContainers.addAll(processOutPorts(gNode, wfInputNode));
+            wfInputNodes.add(wfInputNode);
+        }
+
+        // while port container is not empty iterate graph and build the workflow DAG.
+        buildModel(portContainers);
+
+        return wfInputNodes;
+    }
+
+    private void buildModel(List<PortContainer> portContainerList) {
+        // end condition of recursive call.
+        if (portContainerList == null || portContainerList.isEmpty()) {
+            return ;
+        }
+        DataPort dataPort = null;
+        InPort inPort = null;
+        ApplicationNode wfApplicationNode = null;
+        WorkflowOutputNode wfOutputNode = null;
+        List<PortContainer> nextPortContainerList = new ArrayList<PortContainer>();
+        for (PortContainer portContainer : portContainerList) {
+            dataPort = portContainer.getDataPort();
+            inPort = portContainer.getInPort();
+            Node node = dataPort.getNode();
+            if (node instanceof WSNode) {
+                WSNode wsNode = (WSNode) node;
+                WorkflowNode wfNode = wfNodes.get(wsNode.getID());
+                if (wfNode == null) {
+                    wfApplicationNode = createApplicationNode(wsNode);
+                    wfNodes.put(wfApplicationNode.getId(), wfApplicationNode);
+                    nextPortContainerList.addAll(processOutPorts(wsNode, wfApplicationNode));
+                } else if (wfNode instanceof ApplicationNode) {
+                    wfApplicationNode = (ApplicationNode) wfNode;
+                } else {
+                    // TODO : handle this scenario
+                }
+                inPort.setNode(wfApplicationNode);
+                wfApplicationNode.addInPort(inPort);
+
+            }else if (node instanceof OutputNode) {
+                OutputNode oNode = (OutputNode) node;
+                wfOutputNode = createWorkflowOutputNode(oNode);
+                wfOutputNode.setInPort(inPort);
+                inPort.setNode(wfOutputNode);
+                wfNodes.put(wfOutputNode.getId(), wfOutputNode);
+            }
+        }
+        buildModel(nextPortContainerList);
+
+    }
+
+    private WorkflowOutputNode createWorkflowOutputNode(OutputNode oNode) {
+        WorkflowOutputNodeImpl workflowOutputNode = new WorkflowOutputNodeImpl(oNode.getID(), oNode.getName());
+        OutputDataObjectType outputDataObjectType = new OutputDataObjectType();
+        outputDataObjectType.setType(oNode.getParameterType());
+        workflowOutputNode.setOutputObject(outputDataObjectType);
+        return workflowOutputNode;
+    }
+
+    private ApplicationNode createApplicationNode(WSNode wsNode) {
+        ApplicationNode applicationNode = new ApplicationNodeImpl(wsNode.getID(),
+                wsNode.getComponent().getApplication().getName(),
+                wsNode.getComponent().getApplication().getApplicationId());
+        return applicationNode;
+    }
+
+    private List<PortContainer> processOutPorts(Node node, WorkflowNode wfNode) {
+        OutPort outPort ;
+        Edge edge;
+        InPort inPort = null;
+        List<PortContainer> portContainers = new ArrayList<PortContainer>();
+        for (DataPort dataPort : node.getOutputPorts()) {
+            outPort = createOutPort(dataPort);
+            for (DataEdge dataEdge : dataPort.getEdges()) {
+                edge = new DirectedEdge();
+                edge.setFromPort(outPort);
+                outPort.addEdge(edge);
+                inPort = createInPort(dataEdge.getToPort());
+                edge.setToPort(inPort);
+                inPort.addEdge(edge);
+                portContainers.add(new PortContainer(dataEdge.getToPort(), inPort));
+            }
+            outPort.setNode(wfNode);
+            if (wfNode instanceof WorkflowInputNode) {
+                WorkflowInputNode workflowInputNode = (WorkflowInputNode) wfNode;
+                workflowInputNode.setOutPort(outPort);
+            } else if (wfNode instanceof ApplicationNode) {
+                ApplicationNode applicationNode = ((ApplicationNode) wfNode);
+                applicationNode.addOutPort(outPort);
+            }
+        }
+        return portContainers;
+    }
+
+    private OutPort createOutPort(DataPort dataPort) {
+        OutPortImpl outPort = new OutPortImpl(dataPort.getID());
+        OutputDataObjectType outputDataObjectType = new OutputDataObjectType();
+        if (dataPort instanceof WSPort) {
+            WSPort wsPort = (WSPort) dataPort;
+            outputDataObjectType.setName(wsPort.getFromNode().getName());
+            outputDataObjectType.setType(wsPort.getType());
+        }else if (dataPort instanceof SystemDataPort) {
+            SystemDataPort sysPort = (SystemDataPort) dataPort;
+            outputDataObjectType.setName(sysPort.getFromNode().getName());
+            outputDataObjectType.setType(sysPort.getType());
+        }
+
+        outPort.setOutputObject(outputDataObjectType);
+        return outPort;
+    }
+
+    private InPort createInPort(DataPort toPort) {
+        InPort inPort = new InputPortIml(toPort.getID());
+        InputDataObjectType inputDataObjectType = new InputDataObjectType();
+        if (toPort instanceof WSPort) {
+            WSPort wsPort = (WSPort) toPort;
+            inputDataObjectType.setName(wsPort.getName());
+            inputDataObjectType.setType(wsPort.getType());
+            inputDataObjectType.setApplicationArgument(wsPort.getComponentPort().getApplicationArgument());
+            inputDataObjectType.setIsRequired(!wsPort.getComponentPort().isOptional());
+            inputDataObjectType.setInputOrder(wsPort.getComponentPort().getInputOrder());
+
+            inPort.setDefaultValue(wsPort.getComponentPort().getDefaultValue());
+        }else if (toPort instanceof SystemDataPort) {
+            SystemDataPort sysPort = (SystemDataPort) toPort;
+            inputDataObjectType.setName(sysPort.getName());
+            inputDataObjectType.setType(sysPort.getType());
+        }
+        inPort.setInputObject(inputDataObjectType);
+        return inPort;
+    }
+
+    private InputDataObjectType getInputDataObject(DataPort dataPort) {
+        InputDataObjectType inputDataObject = new InputDataObjectType();
+        inputDataObject.setName(dataPort.getName());
+        if (dataPort instanceof WSPort) {
+            WSPort port = (WSPort) dataPort;
+            inputDataObject.setInputOrder(port.getComponentPort().getInputOrder());
+            inputDataObject.setApplicationArgument(port.getComponentPort().getApplicationArgument() == null ?
+                    "" : port.getComponentPort().getApplicationArgument());
+            inputDataObject.setType(dataPort.getType());
+        }
+        return inputDataObject;
+    }
+
+    private OutputDataObjectType getOutputDataObject(InputDataObjectType inputObject) {
+        OutputDataObjectType outputDataObjectType = new OutputDataObjectType();
+        outputDataObjectType.setApplicationArgument(inputObject.getApplicationArgument());
+        outputDataObjectType.setName(inputObject.getName());
+        outputDataObjectType.setType(inputObject.getType());
+        outputDataObjectType.setValue(inputObject.getValue());
+        return outputDataObjectType;
+    }
+
+    private Experiment getExperiment(String experimentId) throws RegistryException {
+        Registry registry = RegistryFactory.getDefaultRegistry();
+        return (Experiment)registry.get(RegistryModelType.EXPERIMENT, experimentId);
+    }
+
+    private Workflow getWorkflowFromExperiment(Experiment experiment) throws RegistryException, AppCatalogException, GraphException, ComponentException {
+        WorkflowCatalog workflowCatalog = getWorkflowCatalog();
+        return new Workflow(workflowCatalog.getWorkflow(experiment.getApplicationId()).getGraph());
+    }
+
+    private WorkflowCatalog getWorkflowCatalog() throws AppCatalogException {
+        return AppCatalogFactory.getAppCatalog().getWorkflowCatalog();
+    }
+
+    private ArrayList<Node> getInputNodes(Workflow wf) {
+        ArrayList<Node> list = new ArrayList<Node>();
+        List<NodeImpl> nodes = wf.getGraph().getNodes();
+        for (Node node : nodes) {
+            String name = node.getComponent().getName();
+            if (InputComponent.NAME.equals(name) || ConstantComponent.NAME.equals(name) || S3InputComponent.NAME.equals(name)) {
+                list.add(node);
+            }
+        }
+        return list;
+    }
+
+    public Map<String, WorkflowNode> getWfNodes() {
+        return wfNodes;
+    }
+}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/PortContainer.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/PortContainer.java b/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/PortContainer.java
new file mode 100644
index 0000000..db3dda5
--- /dev/null
+++ b/modules/simple-workflow/src/main/java/org/apache/airavata/simple/workflow/engine/parser/PortContainer.java
@@ -0,0 +1,53 @@
+/*
+ *
+ * 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.airavata.simple.workflow.engine.parser;
+
+import org.apache.airavata.workflow.model.graph.DataPort;
+import org.apache.airavata.simple.workflow.engine.dag.port.InPort;
+
+
+public class PortContainer {
+    private DataPort dataPort;
+    private InPort inPort;
+
+
+    public PortContainer(DataPort dataPort, InPort inPort) {
+        this.dataPort = dataPort;
+        this.inPort = inPort;
+    }
+
+    public DataPort getDataPort() {
+        return dataPort;
+    }
+
+    public void setDataPort(DataPort dataPort) {
+        this.dataPort = dataPort;
+    }
+
+    public InPort getInPort() {
+        return inPort;
+    }
+
+    public void setInPort(InPort inPort) {
+        this.inPort = inPort;
+    }
+}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/ProcessPack.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/ProcessPack.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/ProcessPack.java
deleted file mode 100644
index ab8b724..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/ProcessPack.java
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine;
-
-import org.apache.airavata.model.workspace.experiment.TaskDetails;
-import org.apache.airavata.model.workspace.experiment.WorkflowNodeDetails;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.WorkflowNode;
-
-public class ProcessPack {
-    private WorkflowNode workflowNode;
-    private WorkflowNodeDetails wfNodeDetails;
-    private TaskDetails taskDetails;
-
-    public ProcessPack(WorkflowNode workflowNode, WorkflowNodeDetails wfNodeDetails, TaskDetails taskDetails) {
-        this.workflowNode = workflowNode;
-        this.wfNodeDetails = wfNodeDetails;
-        this.taskDetails = taskDetails;
-    }
-
-    public WorkflowNode getWorkflowNode() {
-        return workflowNode;
-    }
-
-    public void setWorkflowNode(WorkflowNode workflowNode) {
-        this.workflowNode = workflowNode;
-    }
-
-    public WorkflowNodeDetails getWfNodeDetails() {
-        return wfNodeDetails;
-    }
-
-    public void setWfNodeDetails(WorkflowNodeDetails wfNodeDetails) {
-        this.wfNodeDetails = wfNodeDetails;
-    }
-
-    public TaskDetails getTaskDetails() {
-        return taskDetails;
-    }
-
-    public void setTaskDetails(TaskDetails taskDetails) {
-        this.taskDetails = taskDetails;
-    }
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/SimpleWorkflowInterpreter.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/SimpleWorkflowInterpreter.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/SimpleWorkflowInterpreter.java
deleted file mode 100644
index 93b3bc0..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/SimpleWorkflowInterpreter.java
+++ /dev/null
@@ -1,470 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine;
-
-import com.google.common.eventbus.EventBus;
-import com.google.common.eventbus.Subscribe;
-import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
-import org.apache.airavata.model.appcatalog.appinterface.OutputDataObjectType;
-import org.apache.airavata.model.messaging.event.TaskIdentifier;
-import org.apache.airavata.model.messaging.event.TaskOutputChangeEvent;
-import org.apache.airavata.model.messaging.event.TaskStatusChangeEvent;
-import org.apache.airavata.model.util.ExperimentModelUtil;
-import org.apache.airavata.model.workspace.experiment.ExecutionUnit;
-import org.apache.airavata.model.workspace.experiment.Experiment;
-import org.apache.airavata.model.workspace.experiment.TaskDetails;
-import org.apache.airavata.model.workspace.experiment.TaskState;
-import org.apache.airavata.model.workspace.experiment.WorkflowNodeDetails;
-import org.apache.airavata.model.workspace.experiment.WorkflowNodeState;
-import org.apache.airavata.model.workspace.experiment.WorkflowNodeStatus;
-import org.apache.airavata.persistance.registry.jpa.impl.RegistryFactory;
-import org.apache.airavata.registry.cpi.ChildDataType;
-import org.apache.airavata.registry.cpi.Registry;
-import org.apache.airavata.registry.cpi.RegistryException;
-import org.apache.airavata.registry.cpi.RegistryModelType;
-import org.apache.ariavata.simple.workflow.engine.dag.edge.Edge;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.ApplicationNode;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.NodeState;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.WorkflowInputNode;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.WorkflowNode;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.WorkflowOutputNode;
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-import org.apache.ariavata.simple.workflow.engine.parser.AiravataDefaultParser;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
-public class SimpleWorkflowInterpreter implements Runnable{
-
-    private static final Logger log = LoggerFactory.getLogger(SimpleWorkflowInterpreter.class);
-
-    private List<WorkflowInputNode> workflowInputNodes;
-
-    private Experiment experiment;
-
-    private String credentialToken;
-
-    private Map<String, WorkflowNode> readList = new ConcurrentHashMap<String, WorkflowNode>();
-    private Map<String, WorkflowNode> waitingList = new ConcurrentHashMap<String, WorkflowNode>();
-    private Map<String, ProcessPack> processingQueue = new ConcurrentHashMap<String, ProcessPack>();
-    private Map<String, ProcessPack> completeList = new HashMap<String, ProcessPack>();
-    private Registry registry;
-    private EventBus eventBus = new EventBus();
-    private List<WorkflowOutputNode> completeWorkflowOutputs = new ArrayList<WorkflowOutputNode>();
-
-    public SimpleWorkflowInterpreter(String experimentId, String credentialToken) throws RegistryException {
-        setExperiment(experimentId);
-        this.credentialToken = credentialToken;
-    }
-
-    public SimpleWorkflowInterpreter(Experiment experiment, String credentialStoreToken) {
-        // read the workflow file and build the topology to a DAG. Then execute that dag
-        // get workflowInputNode list and start processing
-        // next() will return ready task and block the thread if no task in ready state.
-        this.experiment = experiment;
-        this.credentialToken = credentialStoreToken;
-    }
-
-
-    public void launchWorkflow() throws Exception {
-        // process workflow input nodes
-//        WorkflowFactoryImpl wfFactory = WorkflowFactoryImpl.getInstance();
-//        WorkflowParser workflowParser = wfFactory.getWorkflowParser(experiment.getExperimentID(), credentialToken);
-        WorkflowParser workflowParser = new AiravataDefaultParser(experiment, credentialToken);
-        log.debug("Initialized workflow parser");
-        setWorkflowInputNodes(workflowParser.parse());
-        log.debug("Parsed the workflow and got the workflow input nodes");
-        processWorkflowInputNodes(getWorkflowInputNodes());
-    }
-
-    // try to remove synchronization tag
-    private synchronized void processReadyList() {
-        for (WorkflowNode readyNode : readList.values()) {
-            try {
-                if (readyNode instanceof WorkflowOutputNode) {
-                    WorkflowOutputNode wfOutputNode = (WorkflowOutputNode) readyNode;
-                    wfOutputNode.getOutputObject().setValue(wfOutputNode.getInPort().getInputObject().getValue());
-                    addToCompleteOutputNodeList(wfOutputNode);
-                    continue;
-                }
-                WorkflowNodeDetails workflowNodeDetails = createWorkflowNodeDetails(readyNode);
-                TaskDetails process = getProcess(workflowNodeDetails);
-                ProcessPack processPack = new ProcessPack(readyNode, workflowNodeDetails, process);
-                addToProcessingQueue(processPack);
-//                publishToProcessQueue(process);
-                publishToProcessQueue(processPack);
-            } catch (RegistryException e) {
-                // FIXME : handle this exception
-            }
-        }
-    }
-
-
-    private void publishToProcessQueue(TaskDetails process) {
-        Thread thread = new Thread(new TempPublisher(process, eventBus));
-        thread.start();
-        //TODO: publish to process queue.
-    }
-
-    // TODO : remove this test method
-    private void publishToProcessQueue(ProcessPack process) {
-        WorkflowNode workflowNode = process.getWorkflowNode();
-        if (workflowNode instanceof ApplicationNode) {
-            ApplicationNode applicationNode = (ApplicationNode) workflowNode;
-            List<InPort> inputPorts = applicationNode.getInputPorts();
-            if (applicationNode.getName().equals("Add")) {
-                applicationNode.getOutputPorts().get(0).getOutputObject().setValue(String.valueOf(
-                        Integer.parseInt(inputPorts.get(0).getInputObject().getValue()) + Integer.parseInt(inputPorts.get(1).getInputObject().getValue())));
-            } else if (applicationNode.getName().equals("Multiply")) {
-                applicationNode.getOutputPorts().get(0).getOutputObject().setValue(String.valueOf(
-                        Integer.parseInt(inputPorts.get(0).getInputObject().getValue()) * Integer.parseInt(inputPorts.get(1).getInputObject().getValue())));
-            } else if (applicationNode.getName().equals("Subtract")) {
-                applicationNode.getOutputPorts().get(0).getOutputObject().setValue(String.valueOf(
-                        Integer.parseInt(inputPorts.get(0).getInputObject().getValue()) - Integer.parseInt(inputPorts.get(1).getInputObject().getValue())));
-            } else {
-                throw new RuntimeException("Invalid Application name");
-            }
-
-            for (Edge edge : applicationNode.getOutputPorts().get(0).getOutEdges()) {
-                WorkflowUtil.copyValues(applicationNode.getOutputPorts().get(0).getOutputObject(), edge.getToPort().getInputObject());
-                if (edge.getToPort().getNode().isReady()) {
-                    addToReadyQueue(edge.getToPort().getNode());
-                } else {
-                    addToWaitingQueue(edge.getToPort().getNode());
-                }
-            }
-        } else if (workflowNode instanceof WorkflowOutputNode) {
-            WorkflowOutputNode wfOutputNode = (WorkflowOutputNode) workflowNode;
-            throw new RuntimeException("Workflow output node in processing queue");
-        }
-
-        processingQueue.remove(process.getTaskDetails().getTaskID());
-    }
-
-    private TaskDetails getProcess(WorkflowNodeDetails wfNodeDetails) throws RegistryException {
-        // create workflow taskDetails from workflowNodeDetails
-        TaskDetails taskDetails = ExperimentModelUtil.cloneTaskFromWorkflowNodeDetails(getExperiment(), wfNodeDetails);
-        taskDetails.setTaskID(getRegistry()
-                .add(ChildDataType.TASK_DETAIL, taskDetails, wfNodeDetails.getNodeInstanceId()).toString());
-        return taskDetails;
-    }
-
-    private WorkflowNodeDetails createWorkflowNodeDetails(WorkflowNode readyNode) throws RegistryException {
-        WorkflowNodeDetails wfNodeDetails = ExperimentModelUtil.createWorkflowNode(readyNode.getId(), null);
-        ExecutionUnit executionUnit = ExecutionUnit.APPLICATION;
-        String executionData = null;
-        if (readyNode instanceof ApplicationNode) {
-            executionUnit = ExecutionUnit.APPLICATION;
-            executionData = ((ApplicationNode) readyNode).getApplicationId();
-        } else if (readyNode instanceof WorkflowInputNode) {
-            executionUnit = ExecutionUnit.INPUT;
-        } else if (readyNode instanceof WorkflowOutputNode) {
-            executionUnit = ExecutionUnit.OUTPUT;
-        }
-        wfNodeDetails.setExecutionUnit(executionUnit);
-        wfNodeDetails.setExecutionUnitData(executionData);
-        setupNodeDetailsInput(readyNode, wfNodeDetails);
-        wfNodeDetails.setNodeInstanceId((String) getRegistry()
-                .add(ChildDataType.WORKFLOW_NODE_DETAIL, wfNodeDetails, getExperiment().getExperimentID()));
-//        nodeInstanceList.put(node, wfNodeDetails);
-        return wfNodeDetails;
-    }
-
-    private void setupNodeDetailsInput(WorkflowNode readyNode, WorkflowNodeDetails wfNodeDetails) {
-        if (readyNode instanceof ApplicationNode) {
-            ApplicationNode applicationNode = (ApplicationNode) readyNode;
-            if (applicationNode.isReady()) {
-                for (InPort inPort : applicationNode.getInputPorts()) {
-                    wfNodeDetails.addToNodeInputs(inPort.getInputObject());
-                }
-            } else {
-                // TODO: handle this scenario properly.
-            }
-        } else {
-            // TODO: do we support for other type of workflow nodes ?
-        }
-    }
-
-
-    private void processWorkflowInputNodes(List<WorkflowInputNode> wfInputNodes) {
-        Set<WorkflowNode> tempNodeSet = new HashSet<WorkflowNode>();
-        for (WorkflowInputNode wfInputNode : wfInputNodes) {
-            if (wfInputNode.isReady()) {
-                log.debug("Workflow node : " + wfInputNode.getId() + " is ready to execute");
-                for (Edge edge : wfInputNode.getOutPort().getOutEdges()) {
-                    edge.getToPort().getInputObject().setValue(wfInputNode.getInputObject().getValue());
-                    if (edge.getToPort().getNode().isReady()) {
-                        addToReadyQueue(edge.getToPort().getNode());
-                        log.debug("Added workflow node : " + edge.getToPort().getNode().getId() + " to the readyQueue");
-                    } else {
-                        addToWaitingQueue(edge.getToPort().getNode());
-                        log.debug("Added workflow node " + edge.getToPort().getNode().getId() + " to the waitingQueue");
-
-                    }
-                }
-            }
-        }
-    }
-
-
-    public List<WorkflowInputNode> getWorkflowInputNodes() throws Exception {
-        return workflowInputNodes;
-    }
-
-    public void setWorkflowInputNodes(List<WorkflowInputNode> workflowInputNodes) {
-        this.workflowInputNodes = workflowInputNodes;
-    }
-
-
-    private List<WorkflowInputNode> parseWorkflowDescription(){
-        return null;
-    }
-
-
-    private Registry getRegistry() throws RegistryException {
-        if (registry==null){
-            registry = RegistryFactory.getDefaultRegistry();
-        }
-        return registry;
-    }
-
-    public Experiment getExperiment() {
-        return experiment;
-    }
-
-    private void updateWorkflowNodeStatus(WorkflowNodeDetails wfNodeDetails, WorkflowNodeState state) throws RegistryException{
-        WorkflowNodeStatus status = ExperimentModelUtil.createWorkflowNodeStatus(state);
-        wfNodeDetails.setWorkflowNodeStatus(status);
-        getRegistry().update(RegistryModelType.WORKFLOW_NODE_STATUS, status, wfNodeDetails.getNodeInstanceId());
-    }
-
-    @Subscribe
-    public void taskOutputChanged(TaskOutputChangeEvent taskOutputEvent){
-        String taskId = taskOutputEvent.getTaskIdentity().getTaskId();
-        log.debug("Task Output changed event received for workflow node : " +
-                taskOutputEvent.getTaskIdentity().getWorkflowNodeId() + ", task : " + taskId);
-        ProcessPack processPack = processingQueue.get(taskId);
-        Set<WorkflowNode> tempWfNodeSet = new HashSet<WorkflowNode>();
-        if (processPack != null) {
-            WorkflowNode workflowNode = processPack.getWorkflowNode();
-            if (workflowNode instanceof ApplicationNode) {
-                ApplicationNode applicationNode = (ApplicationNode) workflowNode;
-                // Workflow node can have one to many output ports and each output port can have one to many links
-                for (OutPort outPort : applicationNode.getOutputPorts()) {
-                    for (OutputDataObjectType outputDataObjectType : taskOutputEvent.getOutput()) {
-                        if (outPort.getOutputObject().getName().equals(outputDataObjectType.getName())) {
-                            outPort.getOutputObject().setValue(outputDataObjectType.getValue());
-                            break;
-                        }
-                    }
-                    for (Edge edge : outPort.getOutEdges()) {
-                        WorkflowUtil.copyValues(outPort.getOutputObject(), edge.getToPort().getInputObject());
-                        if (edge.getToPort().getNode().isReady()) {
-                            addToReadyQueue(edge.getToPort().getNode());
-                        }
-                    }
-                }
-            }
-            processingQueue.remove(taskId);
-            log.debug("removed task from processing queue : " + taskId);
-        }
-
-    }
-
-    @Subscribe
-    public void taskStatusChanged(TaskStatusChangeEvent taskStatus){
-        String taskId = taskStatus.getTaskIdentity().getTaskId();
-        ProcessPack processPack = processingQueue.get(taskId);
-        if (processPack != null) {
-            WorkflowNodeState wfNodeState = WorkflowNodeState.UNKNOWN;
-            switch (taskStatus.getState()) {
-                case WAITING:
-                    break;
-                case STARTED:
-                    break;
-                case PRE_PROCESSING:
-                    processPack.getWorkflowNode().setState(NodeState.PRE_PROCESSING);
-                    break;
-                case INPUT_DATA_STAGING:
-                    processPack.getWorkflowNode().setState(NodeState.PRE_PROCESSING);
-                    break;
-                case EXECUTING:
-                    processPack.getWorkflowNode().setState(NodeState.EXECUTING);
-                    break;
-                case OUTPUT_DATA_STAGING:
-                    processPack.getWorkflowNode().setState(NodeState.POST_PROCESSING);
-                    break;
-                case POST_PROCESSING:
-                    processPack.getWorkflowNode().setState(NodeState.POST_PROCESSING);
-                    break;
-                case COMPLETED:
-                    processPack.getWorkflowNode().setState(NodeState.EXECUTED);
-                    break;
-                case FAILED:
-                    processPack.getWorkflowNode().setState(NodeState.FAILED);
-                    break;
-                case UNKNOWN:
-                    break;
-                case CONFIGURING_WORKSPACE:
-                    break;
-                case CANCELED:
-                case CANCELING:
-                    processPack.getWorkflowNode().setState(NodeState.FAILED);
-                    break;
-                default:
-                    break;
-            }
-            if (wfNodeState != WorkflowNodeState.UNKNOWN) {
-                try {
-                    updateWorkflowNodeStatus(processPack.getWfNodeDetails(), wfNodeState);
-                } catch (RegistryException e) {
-                    // TODO: handle this.
-                }
-            }
-        }
-
-    }
-
-    /**
-     * Remove the workflow node from waiting queue and add it to the ready queue.
-     * @param workflowNode - Workflow Node
-     */
-    private synchronized void addToReadyQueue(WorkflowNode workflowNode) {
-        waitingList.remove(workflowNode.getId());
-        readList.put(workflowNode.getId(), workflowNode);
-    }
-
-    private void addToWaitingQueue(WorkflowNode workflowNode) {
-        waitingList.put(workflowNode.getId(), workflowNode);
-    }
-
-    /**
-     * First remove the node from ready list and then add the WfNodeContainer to the process queue.
-     * Note that underline data structure of the process queue is a Map.
-     * @param processPack - has both workflow and correspond workflowNodeDetails and TaskDetails
-     */
-    private synchronized void addToProcessingQueue(ProcessPack processPack) {
-        readList.remove(processPack.getWorkflowNode().getId());
-        processingQueue.put(processPack.getTaskDetails().getTaskID(), processPack);
-    }
-
-    private synchronized void addToCompleteQueue(ProcessPack processPack) {
-        processingQueue.remove(processPack.getTaskDetails().getTaskID());
-        completeList.put(processPack.getTaskDetails().getTaskID(), processPack);
-    }
-
-
-    private void addToCompleteOutputNodeList(WorkflowOutputNode wfOutputNode) {
-        completeWorkflowOutputs.add(wfOutputNode);
-        readList.remove(wfOutputNode.getId());
-    }
-
-    @Override
-    public void run() {
-        // TODO: Auto generated method body.
-        try {
-            log.debug("Launching workflow");
-            launchWorkflow();
-            while (!(waitingList.isEmpty() && readList.isEmpty())) {
-                processReadyList();
-                Thread.sleep(1000);
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-    private void setExperiment(String experimentId) throws RegistryException {
-        experiment = (Experiment) getRegistry().get(RegistryModelType.EXPERIMENT, experimentId);
-        log.debug("Retrieve Experiment for experiment id : " + experimentId);
-    }
-
-
-    class TempPublisher implements Runnable {
-        private TaskDetails tempTaskDetails;
-        private EventBus tempEventBus;
-
-        public TempPublisher(TaskDetails tempTaskDetails, EventBus tempEventBus) {
-            this.tempTaskDetails = tempTaskDetails;
-            this.tempEventBus = tempEventBus;
-        }
-
-        @Override
-        public void run() {
-            try {
-                TaskIdentifier identifier = new TaskIdentifier(tempTaskDetails.getTaskID(), null, null, null);
-                TaskStatusChangeEvent statusChangeEvent = new TaskStatusChangeEvent(TaskState.PRE_PROCESSING, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.WAITING, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.INPUT_DATA_STAGING, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.STARTED, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.EXECUTING, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.POST_PROCESSING, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.OUTPUT_DATA_STAGING, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-                statusChangeEvent = new TaskStatusChangeEvent(TaskState.COMPLETED, identifier);
-                tempEventBus.post(statusChangeEvent);
-                Thread.sleep(1000);
-
-                List<InputDataObjectType> applicationInputs = tempTaskDetails.getApplicationInputs();
-                List<OutputDataObjectType> applicationOutputs = tempTaskDetails.getApplicationOutputs();
-                log.info("**************   Task output change event fired for application id :" + tempTaskDetails.getApplicationId());
-                if (tempTaskDetails.getApplicationId().equals("Add") || tempTaskDetails.getApplicationId().equals("Add_2")) {
-                    applicationOutputs.get(0).setValue((Integer.parseInt(applicationInputs.get(0).getValue()) +
-                            Integer.parseInt(applicationInputs.get(1).getValue())) + "");
-                } else if (tempTaskDetails.getApplicationId().equals("Subtract")) {
-                    applicationOutputs.get(0).setValue((Integer.parseInt(applicationInputs.get(0).getValue()) -
-                            Integer.parseInt(applicationInputs.get(1).getValue())) + "");
-                } else if (tempTaskDetails.getApplicationId().equals("Multiply")) {
-                    applicationOutputs.get(0).setValue((Integer.parseInt(applicationInputs.get(0).getValue()) *
-                            Integer.parseInt(applicationInputs.get(1).getValue())) + "");
-                }
-                TaskOutputChangeEvent taskOutputChangeEvent = new TaskOutputChangeEvent(applicationOutputs, identifier);
-                eventBus.post(taskOutputChangeEvent);
-
-            } catch (InterruptedException e) {
-                log.error("Thread was interrupted while sleeping");
-            }
-
-        }
-    }
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactory.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactory.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactory.java
deleted file mode 100644
index b0ee4a1..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactory.java
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine;
-
-/**
- * All classes implement this WorkflowFactory interface, should be abstract or singleton.
- */
-public interface WorkflowFactory {
-
-    public WorkflowParser getWorkflowParser(String experimentId, String credentialToken);
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactoryImpl.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactoryImpl.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactoryImpl.java
deleted file mode 100644
index dd84df0..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowFactoryImpl.java
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine;
-
-import org.apache.airavata.registry.cpi.RegistryException;
-import org.apache.ariavata.simple.workflow.engine.parser.AiravataDefaultParser;
-
-/**
- * Singleton class, only one instance can exist in runtime.
- */
-public class WorkflowFactoryImpl implements WorkflowFactory {
-
-    private static WorkflowFactoryImpl workflowFactoryImpl;
-
-    private WorkflowParser workflowParser;
-
-    private static final String synch = "sync";
-
-    private WorkflowFactoryImpl(){
-
-    }
-
-    public static WorkflowFactoryImpl getInstance() {
-        if (workflowFactoryImpl == null) {
-            synchronized (synch) {
-                if (workflowFactoryImpl == null) {
-                    workflowFactoryImpl = new WorkflowFactoryImpl();
-                }
-            }
-        }
-        return workflowFactoryImpl;
-    }
-
-
-    @Override
-    public WorkflowParser getWorkflowParser(String experimentId, String credentialToken) {
-        if (workflowParser == null) {
-            try {
-                workflowParser = new AiravataDefaultParser(experimentId, credentialToken);
-            } catch (RegistryException e) {
-                // TODO : handle this scenario
-            }
-        }
-        return workflowParser;
-    }
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowParser.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowParser.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowParser.java
deleted file mode 100644
index adf0447..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowParser.java
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine;
-
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.WorkflowInputNode;
-
-import java.util.List;
-
-public interface WorkflowParser {
-
-    public List<WorkflowInputNode> parse() throws Exception;
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowUtil.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowUtil.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowUtil.java
deleted file mode 100644
index 688b170..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/WorkflowUtil.java
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine;
-
-import com.google.common.eventbus.EventBus;
-import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
-import org.apache.airavata.model.appcatalog.appinterface.OutputDataObjectType;
-import org.apache.airavata.model.messaging.event.TaskIdentifier;
-import org.apache.airavata.model.messaging.event.TaskStatusChangeEvent;
-import org.apache.airavata.model.workspace.experiment.TaskDetails;
-import org.apache.airavata.model.workspace.experiment.TaskState;
-import org.apache.airavata.persistance.registry.jpa.model.TaskDetail;
-
-public class WorkflowUtil {
-
-    public static InputDataObjectType copyValues(InputDataObjectType fromInputObj, InputDataObjectType toInputObj){
-        if (toInputObj == null) {
-            // TODO : throw an error
-        }
-        toInputObj.setValue(fromInputObj.getValue());
-        if (fromInputObj.getApplicationArgument() != null
-                && !fromInputObj.getApplicationArgument().trim().equals("")) {
-            toInputObj.setApplicationArgument(fromInputObj.getApplicationArgument());
-        }
-        if (toInputObj.getType() == null) {
-            toInputObj.setType(fromInputObj.getType());
-        }
-        return fromInputObj;
-    }
-
-    public static InputDataObjectType copyValues(OutputDataObjectType outputData, InputDataObjectType inputData) {
-        inputData.setValue(outputData.getValue());
-        return inputData;
-    }
-
-
-    public static OutputDataObjectType copyValues(InputDataObjectType inputObject, OutputDataObjectType outputObject) {
-        if (outputObject == null) {
-            outputObject = new OutputDataObjectType();
-        }
-        outputObject.setValue(inputObject.getValue());
-        return outputObject;
-    }
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/DirectedEdge.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/DirectedEdge.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/DirectedEdge.java
deleted file mode 100644
index 9e1544e..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/DirectedEdge.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.edge;
-
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-
-
-public class DirectedEdge implements Edge {
-
-    private InPort inPort;
-    private OutPort outPort;
-
-    @Override
-    public InPort getToPort() {
-        return inPort;
-    }
-
-    @Override
-    public void setToPort(InPort inPort) {
-        this.inPort = inPort;
-    }
-
-    @Override
-    public OutPort getFromPort() {
-        return outPort;
-    }
-
-    @Override
-    public void setFromPort(OutPort outPort) {
-        this.outPort = outPort;
-    }
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/Edge.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/Edge.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/Edge.java
deleted file mode 100644
index cc8116a..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/edge/Edge.java
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.edge;
-
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-
-/**
- * Edge is a link to one node to another, basically edge should have outPort of a workflow node ,
- * which is starting point and inPort of a workflow node, which is end point of the edge.
- */
-
-public interface Edge {
-
-    public InPort getToPort();
-
-    public void setToPort(InPort inPort);
-
-    public OutPort getFromPort();
-
-    public void setFromPort(OutPort outPort);
-
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNode.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNode.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNode.java
deleted file mode 100644
index 6ab5754..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNode.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-
-import java.util.List;
-
-public interface ApplicationNode extends WorkflowNode {
-
-    public String getApplicationId();
-
-    public void addInPort(InPort inPort);
-
-    public List<InPort> getInputPorts();
-
-    public void addOutPort(OutPort outPort);
-
-    public List<OutPort> getOutputPorts();
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNodeImpl.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNodeImpl.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNodeImpl.java
deleted file mode 100644
index 1282dd0..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/ApplicationNodeImpl.java
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class ApplicationNodeImpl implements ApplicationNode {
-
-    private final String nodeId;
-    private NodeState myState = NodeState.WAITING;
-    private String applicationId;
-    private List<InPort> inPorts = new ArrayList<InPort>();
-    private List<OutPort> outPorts = new ArrayList<OutPort>();
-    private String applicationName;
-
-//    public ApplicationNodeImpl(String nodeId) {
-//        this(nodeId, null);
-//    }
-//
-//    public ApplicationNodeImpl(String nodeId, String applicationId) {
-//        this(nodeId, null, applicationId);
-//    }
-
-    public ApplicationNodeImpl(String nodeId, String applicationName, String applicationId) {
-        this.nodeId = nodeId;
-        this.applicationName = applicationName;
-        this.applicationId = applicationId;
-    }
-
-    @Override
-    public String getId() {
-        return this.nodeId;
-    }
-
-    @Override
-    public String getName() {
-        return applicationName;
-    }
-
-    @Override
-    public NodeType getType() {
-        return NodeType.APPLICATION;
-    }
-
-    @Override
-    public NodeState getState() {
-        return myState;
-    }
-
-    @Override
-    public void setState(NodeState newState) {
-        // TODO: node state can't be reversed , correct order WAITING --> READY --> EXECUTING --> EXECUTED --> COMPLETE
-        myState = newState;
-    }
-
-    @Override
-    public boolean isReady() {
-        for (InPort inPort : getInputPorts()) {
-            if (!inPort.isReady()) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    @Override
-    public String getApplicationId() {
-        return this.applicationId;
-    }
-
-    @Override
-    public void addInPort(InPort inPort) {
-        this.inPorts.add(inPort);
-    }
-
-    @Override
-    public List<InPort> getInputPorts() {
-        return this.inPorts;
-    }
-
-    @Override
-    public void addOutPort(OutPort outPort) {
-        this.outPorts.add(outPort);
-    }
-
-    @Override
-    public List<OutPort> getOutputPorts() {
-        return this.outPorts;
-    }
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeState.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeState.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeState.java
deleted file mode 100644
index 088336b..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeState.java
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-public enum NodeState {
-    WAITING, // waiting on inputs
-    READY, // all inputs are available and ready to execute
-    QUEUED, //
-    PRE_PROCESSING, //
-    EXECUTING, // task has been submitted , not yet finish
-    EXECUTED, // task executed
-    POST_PROCESSING, //
-    FAILED,
-    COMPLETE // all works done
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeType.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeType.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeType.java
deleted file mode 100644
index 9cef6ab..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/NodeType.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-public enum NodeType {
-    APPLICATION,
-    WORKFLOW_INPUT,
-    WORKFLOW_OUTPUT
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNode.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNode.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNode.java
deleted file mode 100644
index 0c1d0b4..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNode.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-
-public interface WorkflowInputNode extends WorkflowNode {
-
-    public InputDataObjectType getInputObject();
-
-    public void setInputObject(InputDataObjectType inputObject);
-
-    public OutPort getOutPort();
-
-    public void setOutPort(OutPort outPort);
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNodeImpl.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNodeImpl.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNodeImpl.java
deleted file mode 100644
index a015909..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowInputNodeImpl.java
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.port.OutPort;
-
-public class WorkflowInputNodeImpl implements WorkflowInputNode {
-
-    private NodeState myState = NodeState.READY;
-    private final String nodeId;
-    private String nodeName;
-    private OutPort outPort;
-    private InputDataObjectType inputDataObjectType;
-    private String name;
-
-    public WorkflowInputNodeImpl(String nodeId) {
-        this(nodeId, null);
-    }
-
-    public WorkflowInputNodeImpl(String nodeId, String nodeName) {
-        this.nodeId = nodeId;
-        this.nodeName = nodeName;
-    }
-
-    @Override
-    public String getId() {
-        return this.nodeId;
-    }
-
-    @Override
-    public String getName() {
-        return this.nodeName;
-    }
-
-    @Override
-    public NodeType getType() {
-        return NodeType.WORKFLOW_INPUT;
-    }
-
-    @Override
-    public NodeState getState() {
-        return myState;
-    }
-
-    @Override
-    public void setState(NodeState newState) {
-        // TODO: node state can't be reversed , correct order WAITING --> READY --> EXECUTING --> EXECUTED --> COMPLETE
-        myState = newState;
-    }
-
-    @Override
-    public boolean isReady() {
-        return (inputDataObjectType.getValue() != null && !inputDataObjectType.getValue().equals(""))
-                || !inputDataObjectType.isIsRequired();
-    }
-
-    @Override
-    public InputDataObjectType getInputObject() {
-        return this.inputDataObjectType;
-    }
-
-    @Override
-    public void setInputObject(InputDataObjectType inputObject) {
-        this.inputDataObjectType = inputObject;
-    }
-
-    @Override
-    public OutPort getOutPort() {
-        return this.outPort;
-    }
-
-    @Override
-    public void setOutPort(OutPort outPort) {
-        this.outPort = outPort;
-    }
-
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowNode.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowNode.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowNode.java
deleted file mode 100644
index f875674..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowNode.java
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-public interface WorkflowNode {
-
-    public String getId();
-
-    public String getName();
-
-    public NodeType getType();
-
-    public NodeState getState();
-
-    public void setState(NodeState newState);
-
-    public boolean isReady();
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNode.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNode.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNode.java
deleted file mode 100644
index 63a52a3..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNode.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-import org.apache.airavata.model.appcatalog.appinterface.OutputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-
-public interface WorkflowOutputNode extends WorkflowNode {
-
-    public OutputDataObjectType getOutputObject();
-
-    public void setOutputObject(OutputDataObjectType outputObject);
-
-    public InPort getInPort();
-
-    public void setInPort(InPort inPort);
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNodeImpl.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNodeImpl.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNodeImpl.java
deleted file mode 100644
index a44c05f..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/nodes/WorkflowOutputNodeImpl.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.nodes;
-
-import org.apache.airavata.model.appcatalog.appinterface.OutputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.port.InPort;
-
-public class WorkflowOutputNodeImpl implements WorkflowOutputNode {
-
-    private NodeState myState = NodeState.WAITING;
-    private final String nodeId;
-    private String nodeName;
-    private OutputDataObjectType outputDataObjectType;
-    private InPort inPort;
-
-    public WorkflowOutputNodeImpl(String nodeId) {
-        this(nodeId, null);
-    }
-
-    public WorkflowOutputNodeImpl(String nodeId, String nodeName) {
-        this.nodeId = nodeId;
-        this.nodeName = nodeName;
-    }
-
-    @Override
-    public String getId() {
-        return this.nodeId;
-    }
-
-    @Override
-    public String getName() {
-        return this.nodeName;
-    }
-
-    @Override
-    public NodeType getType() {
-        return NodeType.WORKFLOW_OUTPUT;
-    }
-
-    @Override
-    public NodeState getState() {
-        return myState;
-    }
-
-    @Override
-    public void setState(NodeState newState) {
-        // TODO: node state can't be reversed , correct order WAITING --> READY --> EXECUTING --> EXECUTED --> COMPLETE
-        myState = newState;
-    }
-
-    @Override
-    public boolean isReady() {
-        return !(inPort.getInputObject() == null || inPort.getInputObject().getValue() == null
-                || inPort.getInputObject().getValue().equals(""));
-    }
-
-    @Override
-    public OutputDataObjectType getOutputObject() {
-        return this.outputDataObjectType;
-    }
-
-    @Override
-    public void setOutputObject(OutputDataObjectType outputObject) {
-        this.outputDataObjectType = outputObject;
-    }
-
-    @Override
-    public InPort getInPort() {
-        return this.inPort;
-    }
-
-    @Override
-    public void setInPort(InPort inPort) {
-        this.inPort = inPort;
-    }
-
-}
-

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InPort.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InPort.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InPort.java
deleted file mode 100644
index bac10ee..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InPort.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.port;
-
-import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.edge.Edge;
-
-public interface InPort extends Port {
-
-    public void setInputObject(InputDataObjectType inputObject);
-
-    public InputDataObjectType getInputObject();
-
-    public Edge getEdge();
-
-    public void addEdge(Edge edge);
-
-    public String getDefaultValue();
-
-    public void setDefaultValue(String defaultValue);
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InputPortIml.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InputPortIml.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InputPortIml.java
deleted file mode 100644
index 82160a9..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/InputPortIml.java
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * 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.ariavata.simple.workflow.engine.dag.port;
-
-import org.apache.airavata.model.appcatalog.appinterface.InputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.edge.Edge;
-import org.apache.ariavata.simple.workflow.engine.dag.nodes.WorkflowNode;
-
-public class InputPortIml implements InPort {
-
-    private InputDataObjectType inputDataObjectType;
-    private boolean ready = false;
-    private String portId;
-    private Edge edge;
-    private WorkflowNode node;
-    private String defaultValue;
-
-    public InputPortIml(String portId) {
-        this.portId = portId;
-    }
-
-    @Override
-    public void setInputObject(InputDataObjectType inputObject) {
-        this.inputDataObjectType = inputObject;
-        ready = (inputDataObjectType.getValue() != null && !inputDataObjectType.getValue().equals(""))
-                || !inputDataObjectType.isIsRequired();
-    }
-
-    @Override
-    public InputDataObjectType getInputObject() {
-        return this.inputDataObjectType;
-    }
-
-    @Override
-    public Edge getEdge() {
-        return this.edge;
-    }
-
-    @Override
-    public void addEdge(Edge edge) {
-        this.edge = edge;
-    }
-
-    @Override
-    public String getDefaultValue() {
-        return defaultValue;
-    }
-
-    public void setDefaultValue(String defaultValue) {
-        this.defaultValue = defaultValue;
-    }
-
-    @Override
-    public boolean isReady() {
-        return getInputObject() != null && inputDataObjectType.getValue() != null && !inputDataObjectType.getValue().equals("");
-    }
-
-    @Override
-    public WorkflowNode getNode() {
-        return this.node;
-    }
-
-    @Override
-    public void setNode(WorkflowNode workflowNode) {
-        this.node = workflowNode;
-    }
-
-    @Override
-    public String getId() {
-        return this.portId;
-    }
-
-}

http://git-wip-us.apache.org/repos/asf/airavata/blob/6bfb9563/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/OutPort.java
----------------------------------------------------------------------
diff --git a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/OutPort.java b/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/OutPort.java
deleted file mode 100644
index 04a7e1e..0000000
--- a/modules/simple-workflow/src/main/java/org/apache/ariavata/simple/workflow/engine/dag/port/OutPort.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- *
- * 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.ariavata.simple.workflow.engine.dag.port;
-
-import org.apache.airavata.model.appcatalog.appinterface.OutputDataObjectType;
-import org.apache.ariavata.simple.workflow.engine.dag.edge.Edge;
-
-import java.util.List;
-
-public interface OutPort extends Port {
-
-    public void setOutputObject(OutputDataObjectType outputObject);
-
-    public OutputDataObjectType getOutputObject();
-
-    public List<Edge> getOutEdges();
-
-    public void addEdge(Edge edge);
-
-}


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