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From w...@apache.org
Subject [26/37] hadoop git commit: HDFS-13215. RBF: Move Router to its own module.
Date Tue, 20 Mar 2018 06:18:15 GMT
http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationRequestPBImpl.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationRequestPBImpl.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationRequestPBImpl.java
new file mode 100644
index 0000000..5091360
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationRequestPBImpl.java
@@ -0,0 +1,95 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.protocol.impl.pb;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.UpdateNamenodeRegistrationRequestProto;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.UpdateNamenodeRegistrationRequestProtoOrBuilder;
+import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeServiceState;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.UpdateNamenodeRegistrationRequest;
+import org.apache.hadoop.hdfs.server.federation.store.records.impl.pb.PBRecord;
+
+import com.google.protobuf.Message;
+
+/**
+ * Protobuf implementation of the state store API object
+ * OverrideNamenodeRegistrationRequest.
+ */
+public class UpdateNamenodeRegistrationRequestPBImpl
+    extends UpdateNamenodeRegistrationRequest implements PBRecord {
+
+  private FederationProtocolPBTranslator<
+      UpdateNamenodeRegistrationRequestProto,
+      UpdateNamenodeRegistrationRequestProto.Builder,
+      UpdateNamenodeRegistrationRequestProtoOrBuilder> translator =
+          new FederationProtocolPBTranslator<
+              UpdateNamenodeRegistrationRequestProto,
+              UpdateNamenodeRegistrationRequestProto.Builder,
+              UpdateNamenodeRegistrationRequestProtoOrBuilder>(
+                  UpdateNamenodeRegistrationRequestProto.class);
+
+  public UpdateNamenodeRegistrationRequestPBImpl() {
+  }
+
+  @Override
+  public UpdateNamenodeRegistrationRequestProto getProto() {
+    return this.translator.build();
+  }
+
+  @Override
+  public void setProto(Message protocol) {
+    this.translator.setProto(protocol);
+  }
+
+  @Override
+  public void readInstance(String base64String) throws IOException {
+    this.translator.readInstance(base64String);
+  }
+
+  @Override
+  public String getNameserviceId() {
+    return this.translator.getProtoOrBuilder().getNameserviceId();
+  }
+
+  @Override
+  public String getNamenodeId() {
+    return this.translator.getProtoOrBuilder().getNamenodeId();
+  }
+
+  @Override
+  public FederationNamenodeServiceState getState() {
+    return FederationNamenodeServiceState
+        .valueOf(this.translator.getProtoOrBuilder().getState());
+  }
+
+  @Override
+  public void setNameserviceId(String nsId) {
+    this.translator.getBuilder().setNameserviceId(nsId);
+  }
+
+  @Override
+  public void setNamenodeId(String nnId) {
+    this.translator.getBuilder().setNamenodeId(nnId);
+  }
+
+  @Override
+  public void setState(FederationNamenodeServiceState state) {
+    this.translator.getBuilder().setState(state.toString());
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationResponsePBImpl.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationResponsePBImpl.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationResponsePBImpl.java
new file mode 100644
index 0000000..4558f06
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/UpdateNamenodeRegistrationResponsePBImpl.java
@@ -0,0 +1,73 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.protocol.impl.pb;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.UpdateNamenodeRegistrationResponseProto;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.UpdateNamenodeRegistrationResponseProtoOrBuilder;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.UpdateNamenodeRegistrationResponse;
+import org.apache.hadoop.hdfs.server.federation.store.records.impl.pb.PBRecord;
+
+import com.google.protobuf.Message;
+
+/**
+ * Protobuf implementation of the state store API object
+ * OverrideNamenodeRegistrationResponse.
+ */
+public class UpdateNamenodeRegistrationResponsePBImpl
+    extends UpdateNamenodeRegistrationResponse implements PBRecord {
+
+  private FederationProtocolPBTranslator<
+      UpdateNamenodeRegistrationResponseProto,
+      UpdateNamenodeRegistrationResponseProto.Builder,
+      UpdateNamenodeRegistrationResponseProtoOrBuilder> translator =
+          new FederationProtocolPBTranslator<
+              UpdateNamenodeRegistrationResponseProto,
+              UpdateNamenodeRegistrationResponseProto.Builder,
+              UpdateNamenodeRegistrationResponseProtoOrBuilder>(
+                  UpdateNamenodeRegistrationResponseProto.class);
+
+  public UpdateNamenodeRegistrationResponsePBImpl() {
+  }
+
+  @Override
+  public UpdateNamenodeRegistrationResponseProto getProto() {
+    return this.translator.build();
+  }
+
+  @Override
+  public void setProto(Message proto) {
+    this.translator.setProto(proto);
+  }
+
+  @Override
+  public void readInstance(String base64String) throws IOException {
+    this.translator.readInstance(base64String);
+  }
+
+  @Override
+  public boolean getResult() {
+    return this.translator.getProtoOrBuilder().getStatus();
+  }
+
+  @Override
+  public void setResult(boolean result) {
+    this.translator.getBuilder().setStatus(result);
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/package-info.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/package-info.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/package-info.java
new file mode 100644
index 0000000..43c94be
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/package-info.java
@@ -0,0 +1,29 @@
+/**
+ * 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.
+ */
+
+/**
+ * Protobuf implementations of FederationProtocolBase request/response objects
+ * used by state store APIs. Each state store API is defined in the
+ * org.apache.hadoop.hdfs.server.federation.store.protocol package.
+ */
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+package org.apache.hadoop.hdfs.server.federation.store.protocol.impl.pb;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/package-info.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/package-info.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/package-info.java
new file mode 100644
index 0000000..0249d2c
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/package-info.java
@@ -0,0 +1,31 @@
+/**
+ * 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.
+ */
+
+/**
+ * Contains the abstract definitions of the API request and response objects for
+ * the various state store APIs. The state store supports multiple interface
+ * APIs and multiple data records. Each protocol object requires a serialization
+ * implementation, the default is protobuf.
+ */
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+
+package org.apache.hadoop.hdfs.server.federation.store.protocol;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/BaseRecord.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/BaseRecord.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/BaseRecord.java
new file mode 100644
index 0000000..d5e60ce
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/BaseRecord.java
@@ -0,0 +1,215 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import java.util.Map;
+
+import org.apache.hadoop.util.Time;
+
+/**
+ * Abstract base of a data record in the StateStore. All StateStore records are
+ * derived from this class. Data records are persisted in the data store and
+ * are identified by their primary key. Each data record contains:
+ * <ul>
+ * <li>A primary key consisting of a combination of record data fields.
+ * <li>A modification date.
+ * <li>A creation date.
+ * </ul>
+ */
+public abstract class BaseRecord implements Comparable<BaseRecord> {
+  public static final String ERROR_MSG_CREATION_TIME_NEGATIVE =
+      "The creation time for the record cannot be negative.";
+  public static final String ERROR_MSG_MODIFICATION_TIME_NEGATIVE =
+      "The modification time for the record cannot be negative.";
+
+  /**
+   * Set the modification time for the record.
+   *
+   * @param time Modification time of the record.
+   */
+  public abstract void setDateModified(long time);
+
+  /**
+   * Get the modification time for the record.
+   *
+   * @return Modification time of the record.
+   */
+  public abstract long getDateModified();
+
+  /**
+   * Set the creation time for the record.
+   *
+   * @param time Creation time of the record.
+   */
+  public abstract void setDateCreated(long time);
+
+  /**
+   * Get the creation time for the record.
+   *
+   * @return Creation time of the record
+   */
+  public abstract long getDateCreated();
+
+  /**
+   * Get the expiration time for the record.
+   *
+   * @return Expiration time for the record.
+   */
+  public abstract long getExpirationMs();
+
+  /**
+   * Map of primary key names->values for the record. The primary key can be a
+   * combination of 1-n different State Store serialized values.
+   *
+   * @return Map of key/value pairs that constitute this object's primary key.
+   */
+  public abstract Map<String, String> getPrimaryKeys();
+
+  /**
+   * Initialize the object.
+   */
+  public void init() {
+    // Call this after the object has been constructed
+    initDefaultTimes();
+  }
+
+  /**
+   * Initialize default times. The driver may update these timestamps on insert
+   * and/or update. This should only be called when initializing an object that
+   * is not backed by a data store.
+   */
+  private void initDefaultTimes() {
+    long now = Time.now();
+    this.setDateCreated(now);
+    this.setDateModified(now);
+  }
+
+  /**
+   * Join the primary keys into one single primary key.
+   *
+   * @return A string that is guaranteed to be unique amongst all records of
+   *         this type.
+   */
+  public String getPrimaryKey() {
+    return generateMashupKey(getPrimaryKeys());
+  }
+
+  /**
+   * Generates a cache key from a map of values.
+   *
+   * @param keys Map of values.
+   * @return String mashup of key values.
+   */
+  protected static String generateMashupKey(final Map<String, String> keys) {
+    StringBuilder builder = new StringBuilder();
+    for (Object value : keys.values()) {
+      if (builder.length() > 0) {
+        builder.append("-");
+      }
+      builder.append(value);
+    }
+    return builder.toString();
+  }
+
+  /**
+   * Check if this record matches a partial record.
+   *
+   * @param other Partial record.
+   * @return If this record matches.
+   */
+  public boolean like(BaseRecord other) {
+    if (other == null) {
+      return false;
+    }
+    Map<String, String> thisKeys = this.getPrimaryKeys();
+    Map<String, String> otherKeys = other.getPrimaryKeys();
+    if (thisKeys == null) {
+      return otherKeys == null;
+    }
+    return thisKeys.equals(otherKeys);
+  }
+
+  /**
+   * Override equals check to use primary key(s) for comparison.
+   */
+  @Override
+  public boolean equals(Object obj) {
+    if (!(obj instanceof BaseRecord)) {
+      return false;
+    }
+
+    BaseRecord baseObject = (BaseRecord) obj;
+    Map<String, String> keyset1 = this.getPrimaryKeys();
+    Map<String, String> keyset2 = baseObject.getPrimaryKeys();
+    return keyset1.equals(keyset2);
+  }
+
+  /**
+   * Override hash code to use primary key(s) for comparison.
+   */
+  @Override
+  public int hashCode() {
+    Map<String, String> keyset = this.getPrimaryKeys();
+    return keyset.hashCode();
+  }
+
+  @Override
+  public int compareTo(BaseRecord record) {
+    if (record == null) {
+      return -1;
+    }
+    // Descending date order
+    return (int) (record.getDateModified() - this.getDateModified());
+  }
+
+  /**
+   * Called when the modification time and current time is available, checks for
+   * expirations.
+   *
+   * @param currentTime The current timestamp in ms from the data store, to be
+   *          compared against the modification and creation dates of the
+   *          object.
+   * @return boolean True if the record has been updated and should be
+   *         committed to the data store. Override for customized behavior.
+   */
+  public boolean checkExpired(long currentTime) {
+    long expiration = getExpirationMs();
+    if (getDateModified() > 0 && expiration > 0) {
+      return (getDateModified() + expiration) < currentTime;
+    }
+    return false;
+  }
+
+  /**
+   * Validates the record. Called when the record is created, populated from the
+   * state store, and before committing to the state store. If validate failed,
+   * there throws an exception.
+   */
+  public void validate() {
+    if (getDateCreated() <= 0) {
+      throw new IllegalArgumentException(ERROR_MSG_CREATION_TIME_NEGATIVE);
+    } else if (getDateModified() <= 0) {
+      throw new IllegalArgumentException(ERROR_MSG_MODIFICATION_TIME_NEGATIVE);
+    }
+  }
+
+  @Override
+  public String toString() {
+    return getPrimaryKey();
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipState.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipState.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipState.java
new file mode 100644
index 0000000..e33dedf
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipState.java
@@ -0,0 +1,336 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import static org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeServiceState.ACTIVE;
+import static org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeServiceState.EXPIRED;
+import static org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeServiceState.UNAVAILABLE;
+
+import java.io.IOException;
+import java.util.Comparator;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeContext;
+import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeServiceState;
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
+
+/**
+ * Data schema for storing NN registration information in the
+ * {@link org.apache.hadoop.hdfs.server.federation.store.StateStoreService
+ * FederationStateStoreService}.
+ */
+public abstract class MembershipState extends BaseRecord
+    implements FederationNamenodeContext {
+  public static final String ERROR_MSG_NO_NS_SPECIFIED =
+      "Invalid registration, no nameservice specified ";
+  public static final String ERROR_MSG_NO_WEB_ADDR_SPECIFIED =
+      "Invalid registration, no web address specified ";
+  public static final String ERROR_MSG_NO_RPC_ADDR_SPECIFIED =
+      "Invalid registration, no rpc address specified ";
+  public static final String ERROR_MSG_NO_BP_SPECIFIED =
+      "Invalid registration, no block pool specified ";
+
+  /** Expiration time in ms for this entry. */
+  private static long expirationMs;
+
+
+  /** Comparator based on the name.*/
+  public static final Comparator<MembershipState> NAME_COMPARATOR =
+      new Comparator<MembershipState>() {
+        public int compare(MembershipState m1, MembershipState m2) {
+          return m1.compareNameTo(m2);
+        }
+      };
+
+
+  /**
+   * Constructors.
+   */
+  public MembershipState() {
+    super();
+  }
+
+  /**
+   * Create a new membership instance.
+   * @return Membership instance.
+   * @throws IOException
+   */
+  public static MembershipState newInstance() {
+    MembershipState record =
+        StateStoreSerializer.newRecord(MembershipState.class);
+    record.init();
+    return record;
+  }
+
+  /**
+   * Create a new membership instance.
+   *
+   * @param router Identifier of the router.
+   * @param nameservice Identifier of the nameservice.
+   * @param namenode Identifier of the namenode.
+   * @param clusterId Identifier of the cluster.
+   * @param blockPoolId Identifier of the blockpool.
+   * @param rpcAddress RPC address.
+   * @param serviceAddress Service RPC address.
+   * @param lifelineAddress Lifeline RPC address.
+   * @param webAddress HTTP address.
+   * @param state State of the federation.
+   * @param safemode If the safe mode is enabled.
+   * @return Membership instance.
+   * @throws IOException If we cannot create the instance.
+   */
+  public static MembershipState newInstance(String router, String nameservice,
+      String namenode, String clusterId, String blockPoolId, String rpcAddress,
+      String serviceAddress, String lifelineAddress, String webAddress,
+      FederationNamenodeServiceState state, boolean safemode) {
+
+    MembershipState record = MembershipState.newInstance();
+    record.setRouterId(router);
+    record.setNameserviceId(nameservice);
+    record.setNamenodeId(namenode);
+    record.setRpcAddress(rpcAddress);
+    record.setServiceAddress(serviceAddress);
+    record.setLifelineAddress(lifelineAddress);
+    record.setWebAddress(webAddress);
+    record.setIsSafeMode(safemode);
+    record.setState(state);
+    record.setClusterId(clusterId);
+    record.setBlockPoolId(blockPoolId);
+    record.validate();
+    return record;
+  }
+
+  public abstract void setRouterId(String routerId);
+
+  public abstract String getRouterId();
+
+  public abstract void setNameserviceId(String nameserviceId);
+
+  public abstract void setNamenodeId(String namenodeId);
+
+  public abstract void setWebAddress(String webAddress);
+
+  public abstract void setRpcAddress(String rpcAddress);
+
+  public abstract void setServiceAddress(String serviceAddress);
+
+  public abstract void setLifelineAddress(String lifelineAddress);
+
+  public abstract void setIsSafeMode(boolean isSafeMode);
+
+  public abstract void setClusterId(String clusterId);
+
+  public abstract void setBlockPoolId(String blockPoolId);
+
+  public abstract void setState(FederationNamenodeServiceState state);
+
+  public abstract String getNameserviceId();
+
+  public abstract String getNamenodeId();
+
+  public abstract String getClusterId();
+
+  public abstract String getBlockPoolId();
+
+  public abstract String getRpcAddress();
+
+  public abstract String getServiceAddress();
+
+  public abstract String getLifelineAddress();
+
+  public abstract String getWebAddress();
+
+  public abstract boolean getIsSafeMode();
+
+  public abstract FederationNamenodeServiceState getState();
+
+  public abstract void setStats(MembershipStats stats);
+
+  public abstract MembershipStats getStats();
+
+  public abstract void setLastContact(long contact);
+
+  public abstract long getLastContact();
+
+  @Override
+  public boolean like(BaseRecord o) {
+    if (o instanceof MembershipState) {
+      MembershipState other = (MembershipState)o;
+      if (getRouterId() != null &&
+          !getRouterId().equals(other.getRouterId())) {
+        return false;
+      }
+      if (getNameserviceId() != null &&
+          !getNameserviceId().equals(other.getNameserviceId())) {
+        return false;
+      }
+      if (getNamenodeId() != null &&
+          !getNamenodeId().equals(other.getNamenodeId())) {
+        return false;
+      }
+      if (getRpcAddress() != null &&
+          !getRpcAddress().equals(other.getRpcAddress())) {
+        return false;
+      }
+      if (getClusterId() != null &&
+          !getClusterId().equals(other.getClusterId())) {
+        return false;
+      }
+      if (getBlockPoolId() != null &&
+          !getBlockPoolId().equals(other.getBlockPoolId())) {
+        return false;
+      }
+      if (getState() != null &&
+          !getState().equals(other.getState())) {
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return getRouterId() + "->" + getNameserviceId() + ":" + getNamenodeId()
+        + ":" + getRpcAddress() + "-" + getState();
+  }
+
+  @Override
+  public SortedMap<String, String> getPrimaryKeys() {
+    SortedMap<String, String> map = new TreeMap<String, String>();
+    map.put("routerId", getRouterId());
+    map.put("nameserviceId", getNameserviceId());
+    map.put("namenodeId", getNamenodeId());
+    return map;
+  }
+
+  /**
+   * Check if the namenode is available.
+   *
+   * @return If the namenode is available.
+   */
+  public boolean isAvailable() {
+    return getState() == ACTIVE;
+  }
+
+  /**
+   * Validates the entry. Throws an IllegalArgementException if the data record
+   * is missing required information.
+   */
+  @Override
+  public void validate() {
+    super.validate();
+    if (getNameserviceId() == null || getNameserviceId().length() == 0) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_NO_NS_SPECIFIED + this);
+    }
+    if (getWebAddress() == null || getWebAddress().length() == 0) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_NO_WEB_ADDR_SPECIFIED + this);
+    }
+    if (getRpcAddress() == null || getRpcAddress().length() == 0) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_NO_RPC_ADDR_SPECIFIED + this);
+    }
+    if (!isBadState() &&
+        (getBlockPoolId().isEmpty() || getBlockPoolId().length() == 0)) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_NO_BP_SPECIFIED + this);
+    }
+  }
+
+
+  /**
+   * Overrides the cached getBlockPoolId() with an update. The state will be
+   * reset when the cache is flushed
+   *
+   * @param newState Service state of the namenode.
+   */
+  public void overrideState(FederationNamenodeServiceState newState) {
+    this.setState(newState);
+  }
+
+  /**
+   * Sort by nameservice, namenode, and router.
+   *
+   * @param other Another membership to compare to.
+   * @return If this object goes before the parameter.
+   */
+  public int compareNameTo(MembershipState other) {
+    int ret = this.getNameserviceId().compareTo(other.getNameserviceId());
+    if (ret == 0) {
+      ret = this.getNamenodeId().compareTo(other.getNamenodeId());
+    }
+    if (ret == 0) {
+      ret = this.getRouterId().compareTo(other.getRouterId());
+    }
+    return ret;
+  }
+
+  /**
+   * Get the identifier of this namenode registration.
+   * @return Identifier of the namenode.
+   */
+  public String getNamenodeKey() {
+    return getNamenodeKey(this.getNameserviceId(), this.getNamenodeId());
+  }
+
+  /**
+   * Generate the identifier for a Namenode in the HDFS federation.
+   *
+   * @param nsId Nameservice of the Namenode.
+   * @param nnId Namenode within the Nameservice (HA).
+   * @return Namenode identifier within the federation.
+   */
+  public static String getNamenodeKey(String nsId, String nnId) {
+    return nsId + "-" + nnId;
+  }
+
+  /**
+   * Check if the membership is in a bad state (expired or unavailable).
+   * @return If the membership is in a bad state (expired or unavailable).
+   */
+  private boolean isBadState() {
+    return this.getState() == EXPIRED || this.getState() == UNAVAILABLE;
+  }
+
+  @Override
+  public boolean checkExpired(long currentTime) {
+    if (super.checkExpired(currentTime)) {
+      this.setState(EXPIRED);
+      // Commit it
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public long getExpirationMs() {
+    return MembershipState.expirationMs;
+  }
+
+  /**
+   * Set the expiration time for this class.
+   *
+   * @param time Expiration time in milliseconds.
+   */
+  public static void setExpirationMs(long time) {
+    MembershipState.expirationMs = time;
+  }
+}

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipStats.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipStats.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipStats.java
new file mode 100644
index 0000000..0bd19d9
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MembershipStats.java
@@ -0,0 +1,126 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import java.io.IOException;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
+
+/**
+ * Data schema for storing NN stats in the
+ * {@link org.apache.hadoop.hdfs.server.federation.store.StateStoreService
+ * StateStoreService}.
+ */
+public abstract class MembershipStats extends BaseRecord {
+
+  public static MembershipStats newInstance() throws IOException {
+    MembershipStats record =
+        StateStoreSerializer.newRecord(MembershipStats.class);
+    record.init();
+    return record;
+  }
+
+  public abstract void setTotalSpace(long space);
+
+  public abstract long getTotalSpace();
+
+  public abstract void setAvailableSpace(long space);
+
+  public abstract long getAvailableSpace();
+
+  public abstract void setNumOfFiles(long files);
+
+  public abstract long getNumOfFiles();
+
+  public abstract void setNumOfBlocks(long blocks);
+
+  public abstract long getNumOfBlocks();
+
+  public abstract void setNumOfBlocksMissing(long blocks);
+
+  public abstract long getNumOfBlocksMissing();
+
+  public abstract void setNumOfBlocksPendingReplication(long blocks);
+
+  public abstract long getNumOfBlocksPendingReplication();
+
+  public abstract void setNumOfBlocksUnderReplicated(long blocks);
+
+  public abstract long getNumOfBlocksUnderReplicated();
+
+  public abstract void setNumOfBlocksPendingDeletion(long blocks);
+
+  public abstract long getNumOfBlocksPendingDeletion();
+
+  public abstract void setNumOfActiveDatanodes(int nodes);
+
+  public abstract int getNumOfActiveDatanodes();
+
+  public abstract void setNumOfDeadDatanodes(int nodes);
+
+  public abstract int getNumOfDeadDatanodes();
+
+  public abstract void setNumOfDecommissioningDatanodes(int nodes);
+
+  public abstract int getNumOfDecommissioningDatanodes();
+
+  public abstract void setNumOfDecomActiveDatanodes(int nodes);
+
+  public abstract int getNumOfDecomActiveDatanodes();
+
+  public abstract void setNumOfDecomDeadDatanodes(int nodes);
+
+  public abstract int getNumOfDecomDeadDatanodes();
+
+  @Override
+  public SortedMap<String, String> getPrimaryKeys() {
+    // This record is not stored directly, no key needed
+    SortedMap<String, String> map = new TreeMap<String, String>();
+    return map;
+  }
+
+  @Override
+  public long getExpirationMs() {
+    // This record is not stored directly, no expiration needed
+    return -1;
+  }
+
+  @Override
+  public void setDateModified(long time) {
+    // We don't store this record directly
+  }
+
+  @Override
+  public long getDateModified() {
+    // We don't store this record directly
+    return 0;
+  }
+
+  @Override
+  public void setDateCreated(long time) {
+    // We don't store this record directly
+  }
+
+  @Override
+  public long getDateCreated() {
+    // We don't store this record directly
+    return 0;
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MountTable.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MountTable.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MountTable.java
new file mode 100644
index 0000000..4eff2c9
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/MountTable.java
@@ -0,0 +1,402 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import java.io.IOException;
+import java.util.Comparator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.commons.lang.builder.HashCodeBuilder;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.permission.FsPermission;
+import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation;
+import org.apache.hadoop.hdfs.server.federation.resolver.order.DestinationOrder;
+import org.apache.hadoop.hdfs.server.federation.router.RouterPermissionChecker;
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
+import org.apache.hadoop.hdfs.server.namenode.NameNode;
+import org.apache.hadoop.security.UserGroupInformation;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Data schema for
+ * {@link org.apache.hadoop.hdfs.server.federation.store.
+ * MountTableStore FederationMountTableStore} data stored in the
+ * {@link org.apache.hadoop.hdfs.server.federation.store.
+ * StateStoreService FederationStateStoreService}. Supports string
+ * serialization.
+ */
+public abstract class MountTable extends BaseRecord {
+
+  private static final Logger LOG = LoggerFactory.getLogger(MountTable.class);
+  public static final String ERROR_MSG_NO_SOURCE_PATH =
+      "Invalid entry, no source path specified ";
+  public static final String ERROR_MSG_MUST_START_WITH_BACK_SLASH =
+      "Invalid entry, all mount points must start with / ";
+  public static final String ERROR_MSG_NO_DEST_PATH_SPECIFIED =
+      "Invalid entry, no destination paths specified ";
+  public static final String ERROR_MSG_INVAILD_DEST_NS =
+      "Invalid entry, invalid destination nameservice ";
+  public static final String ERROR_MSG_INVAILD_DEST_PATH =
+      "Invalid entry, invalid destination path ";
+  public static final String ERROR_MSG_ALL_DEST_MUST_START_WITH_BACK_SLASH =
+      "Invalid entry, all destination must start with / ";
+
+  /** Comparator for paths which considers the /. */
+  public static final Comparator<String> PATH_COMPARATOR =
+      new Comparator<String>() {
+        @Override
+        public int compare(String o1, String o2) {
+          String s1 = o1.replace('/', ' ');
+          String s2 = o2.replace('/', ' ');
+          return s1.compareTo(s2);
+        }
+      };
+
+  /** Comparator based on the mount table source. */
+  public static final Comparator<MountTable> SOURCE_COMPARATOR =
+      new Comparator<MountTable>() {
+        public int compare(MountTable m1, MountTable m2) {
+          String src1 = m1.getSourcePath();
+          String src2 = m2.getSourcePath();
+          return PATH_COMPARATOR.compare(src1, src2);
+        }
+      };
+
+
+  /**
+   * Default constructor for a mount table entry.
+   */
+  public MountTable() {
+    super();
+  }
+
+  public static MountTable newInstance() {
+    MountTable record = StateStoreSerializer.newRecord(MountTable.class);
+    record.init();
+    return record;
+  }
+
+  /**
+   * Constructor for a mount table entry with a single destinations.
+   *
+   * @param src Source path in the mount entry.
+   * @param destinations Nameservice destination of the mount point.
+   * @param dateCreated Created date.
+   * @param dateModified Modified date.
+   * @throws IOException
+   */
+  public static MountTable newInstance(final String src,
+      final Map<String, String> destinations,
+      long dateCreated, long dateModified) throws IOException {
+
+    MountTable record = newInstance(src, destinations);
+    record.setDateCreated(dateCreated);
+    record.setDateModified(dateModified);
+    return record;
+  }
+
+  /**
+   * Constructor for a mount table entry with multiple destinations.
+   *
+   * @param src Source path in the mount entry.
+   * @param destinations Nameservice destinations of the mount point.
+   * @throws IOException
+   */
+  public static MountTable newInstance(final String src,
+      final Map<String, String> destinations) throws IOException {
+    MountTable record = newInstance();
+
+    // Normalize the mount path
+    record.setSourcePath(normalizeFileSystemPath(src));
+
+    // Build a list of remote locations
+    final List<RemoteLocation> locations = new LinkedList<>();
+    for (Entry<String, String> entry : destinations.entrySet()) {
+      String nsId = entry.getKey();
+      String path = normalizeFileSystemPath(entry.getValue());
+      RemoteLocation location = new RemoteLocation(nsId, path);
+      locations.add(location);
+    }
+
+    // Set the serialized dest string
+    record.setDestinations(locations);
+
+    // Set permission fields
+    UserGroupInformation ugi = NameNode.getRemoteUser();
+    record.setOwnerName(ugi.getShortUserName());
+    String group = ugi.getGroups().isEmpty() ? ugi.getShortUserName()
+        : ugi.getPrimaryGroupName();
+    record.setGroupName(group);
+    record.setMode(new FsPermission(
+        RouterPermissionChecker.MOUNT_TABLE_PERMISSION_DEFAULT));
+
+    // Validate
+    record.validate();
+    return record;
+  }
+
+  /**
+   * Get source path in the federated namespace.
+   *
+   * @return Source path in the federated namespace.
+   */
+  public abstract String getSourcePath();
+
+  /**
+   * Set source path in the federated namespace.
+   *
+   * @param path Source path in the federated namespace.
+   */
+  public abstract void setSourcePath(String path);
+
+  /**
+   * Get a list of destinations (namespace + path) present for this entry.
+   *
+   * @return List of RemoteLocation destinations. Null if no destinations.
+   */
+  public abstract List<RemoteLocation> getDestinations();
+
+  /**
+   * Set the destination paths.
+   *
+   * @param paths Destination paths.
+   */
+  public abstract void setDestinations(List<RemoteLocation> dests);
+
+  /**
+   * Add a new destination to this mount table entry.
+   */
+  public abstract boolean addDestination(String nsId, String path);
+
+  /**
+   * Check if the entry is read only.
+   *
+   * @return If the entry is read only.
+   */
+  public abstract boolean isReadOnly();
+
+  /**
+   * Set an entry to be read only.
+   *
+   * @param ro If the entry is read only.
+   */
+  public abstract void setReadOnly(boolean ro);
+
+  /**
+   * Get the order of the destinations for this mount table entry.
+   *
+   * @return Order of the destinations.
+   */
+  public abstract DestinationOrder getDestOrder();
+
+  /**
+   * Set the order of the destinations for this mount table entry.
+   *
+   * @param order Order of the destinations.
+   */
+  public abstract void setDestOrder(DestinationOrder order);
+
+  /**
+   * Get owner name of this mount table entry.
+   *
+   * @return Owner name
+   */
+  public abstract String getOwnerName();
+
+  /**
+   * Set owner name of this mount table entry.
+   *
+   * @param owner Owner name for mount table entry
+   */
+  public abstract void setOwnerName(String owner);
+
+  /**
+   * Get group name of this mount table entry.
+   *
+   * @return Group name
+   */
+  public abstract String getGroupName();
+
+  /**
+   * Set group name of this mount table entry.
+   *
+   * @param group Group name for mount table entry
+   */
+  public abstract void setGroupName(String group);
+
+  /**
+   * Get permission of this mount table entry.
+   *
+   * @return FsPermission permission mode
+   */
+  public abstract FsPermission getMode();
+
+  /**
+   * Set permission for this mount table entry.
+   *
+   * @param mode Permission for mount table entry
+   */
+  public abstract void setMode(FsPermission mode);
+
+  /**
+   * Get the default location.
+   * @return The default location.
+   */
+  public RemoteLocation getDefaultLocation() {
+    List<RemoteLocation> dests = this.getDestinations();
+    if (dests == null || dests.isEmpty()) {
+      return null;
+    }
+    return dests.get(0);
+  }
+
+  @Override
+  public boolean like(final BaseRecord o) {
+    if (o instanceof MountTable) {
+      MountTable other = (MountTable)o;
+      if (getSourcePath() != null &&
+          !getSourcePath().equals(other.getSourcePath())) {
+        return false;
+      }
+      if (getDestinations() != null &&
+          !getDestinations().equals(other.getDestinations())) {
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append(this.getSourcePath());
+    sb.append("->");
+    List<RemoteLocation> destinations = this.getDestinations();
+    sb.append(destinations);
+    if (destinations != null && destinations.size() > 1) {
+      sb.append("[" + this.getDestOrder() + "]");
+    }
+    if (this.isReadOnly()) {
+      sb.append("[RO]");
+    }
+
+    if (this.getOwnerName() != null) {
+      sb.append("[owner:").append(this.getOwnerName()).append("]");
+    }
+
+    if (this.getGroupName() != null) {
+      sb.append("[group:").append(this.getGroupName()).append("]");
+    }
+
+    if (this.getMode() != null) {
+      sb.append("[mode:").append(this.getMode()).append("]");
+    }
+
+    return sb.toString();
+  }
+
+  @Override
+  public SortedMap<String, String> getPrimaryKeys() {
+    SortedMap<String, String> map = new TreeMap<>();
+    map.put("sourcePath", this.getSourcePath());
+    return map;
+  }
+
+  @Override
+  public void validate() {
+    super.validate();
+    if (this.getSourcePath() == null || this.getSourcePath().length() == 0) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_NO_SOURCE_PATH + this);
+    }
+    if (!this.getSourcePath().startsWith("/")) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_MUST_START_WITH_BACK_SLASH + this);
+    }
+    if (this.getDestinations() == null || this.getDestinations().size() == 0) {
+      throw new IllegalArgumentException(
+          ERROR_MSG_NO_DEST_PATH_SPECIFIED + this);
+    }
+    for (RemoteLocation loc : getDestinations()) {
+      String nsId = loc.getNameserviceId();
+      if (nsId == null || nsId.length() == 0) {
+        throw new IllegalArgumentException(
+            ERROR_MSG_INVAILD_DEST_NS + this);
+      }
+      if (loc.getDest() == null || loc.getDest().length() == 0) {
+        throw new IllegalArgumentException(
+            ERROR_MSG_INVAILD_DEST_PATH + this);
+      }
+      if (!loc.getDest().startsWith("/")) {
+        throw new IllegalArgumentException(
+            ERROR_MSG_ALL_DEST_MUST_START_WITH_BACK_SLASH + this);
+      }
+    }
+  }
+
+  @Override
+  public long getExpirationMs() {
+    return 0;
+  }
+
+  @Override
+  public int hashCode() {
+    return new HashCodeBuilder(17, 31)
+        .append(this.getSourcePath())
+        .append(this.getDestinations())
+        .append(this.isReadOnly())
+        .append(this.getDestOrder())
+        .toHashCode();
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof MountTable) {
+      MountTable other = (MountTable)obj;
+      if (!this.getSourcePath().equals(other.getSourcePath())) {
+        return false;
+      } else if (!this.getDestinations().equals(other.getDestinations())) {
+        return false;
+      } else if (this.isReadOnly() != other.isReadOnly()) {
+        return false;
+      } else if (!this.getDestOrder().equals(other.getDestOrder())) {
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Normalize a path for that filesystem.
+   *
+   * @param path Path to normalize.
+   * @return Normalized path.
+   */
+  private static String normalizeFileSystemPath(final String path) {
+    Path normalizedPath = new Path(path);
+    return normalizedPath.toString();
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/Query.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/Query.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/Query.java
new file mode 100644
index 0000000..3c59abf
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/Query.java
@@ -0,0 +1,66 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+/**
+ * Check if a record matches a query. The query is usually a partial record.
+ *
+ * @param <T> Type of the record to query.
+ */
+public class Query<T extends BaseRecord> {
+
+  /** Partial object to compare against. */
+  private final T partial;
+
+
+  /**
+   * Create a query to search for a partial record.
+   *
+   * @param partial It defines the attributes to search.
+   */
+  public Query(final T part) {
+    this.partial = part;
+  }
+
+  /**
+   * Get the partial record used to query.
+   *
+   * @return The partial record used for the query.
+   */
+  public T getPartial() {
+    return this.partial;
+  }
+
+  /**
+   * Check if a record matches the primary keys or the partial record.
+   *
+   * @param other Record to check.
+   * @return If the record matches. Don't match if there is no partial.
+   */
+  public boolean matches(T other) {
+    if (this.partial == null) {
+      return false;
+    }
+    return this.partial.like(other);
+  }
+
+  @Override
+  public String toString() {
+    return "Checking: " + this.partial;
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/QueryResult.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/QueryResult.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/QueryResult.java
new file mode 100644
index 0000000..64c2c71
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/QueryResult.java
@@ -0,0 +1,56 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Encapsulates a state store query result that includes a set of records and a
+ * time stamp for the result.
+ */
+public class QueryResult<T extends BaseRecord> {
+
+  /** Data result. */
+  private final List<T> records;
+  /** Time stamp of the data results. */
+  private final long timestamp;
+
+  public QueryResult(final List<T> recs, final long time) {
+    this.records = recs;
+    this.timestamp = time;
+  }
+
+  /**
+   * Get the result of the query.
+   *
+   * @return List of records.
+   */
+  public List<T> getRecords() {
+    return Collections.unmodifiableList(this.records);
+  }
+
+  /**
+   * The timetamp in driver time of this query.
+   *
+   * @return Timestamp in driver time.
+   */
+  public long getTimestamp() {
+    return this.timestamp;
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/RouterState.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/RouterState.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/RouterState.java
new file mode 100644
index 0000000..c90abcc
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/RouterState.java
@@ -0,0 +1,168 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import java.io.IOException;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.hadoop.hdfs.server.federation.router.FederationUtil;
+import org.apache.hadoop.hdfs.server.federation.router.RouterServiceState;
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Entry to log the state of a
+ * {@link org.apache.hadoop.hdfs.server.federation.router.Router Router} in the
+ * {@link org.apache.hadoop.hdfs.server.federation.store.StateStoreService
+ * FederationStateStoreService}.
+ */
+public abstract class RouterState extends BaseRecord {
+
+  private static final Logger LOG = LoggerFactory.getLogger(RouterState.class);
+
+  /** Expiration time in ms for this entry. */
+  private static long expirationMs;
+
+  /**
+   * Constructors.
+   */
+  public RouterState() {
+    super();
+  }
+
+  public static RouterState newInstance() {
+    RouterState record = StateStoreSerializer.newRecord(RouterState.class);
+    record.init();
+    return record;
+  }
+
+  public static RouterState newInstance(String addr, long startTime,
+      RouterServiceState status) {
+    RouterState record = newInstance();
+    record.setDateStarted(startTime);
+    record.setAddress(addr);
+    record.setStatus(status);
+    record.setCompileInfo(FederationUtil.getCompileInfo());
+    record.setVersion(FederationUtil.getVersion());
+    return record;
+  }
+
+  public abstract void setAddress(String address);
+
+  public abstract void setDateStarted(long dateStarted);
+
+  public abstract String getAddress();
+
+  public abstract StateStoreVersion getStateStoreVersion() throws IOException;
+
+  public abstract void setStateStoreVersion(StateStoreVersion version);
+
+  public abstract RouterServiceState getStatus();
+
+  public abstract void setStatus(RouterServiceState newStatus);
+
+  public abstract String getVersion();
+
+  public abstract void setVersion(String version);
+
+  public abstract String getCompileInfo();
+
+  public abstract void setCompileInfo(String info);
+
+  public abstract long getDateStarted();
+
+  /**
+   * Get the identifier for the Router. It uses the address.
+   *
+   * @return Identifier for the Router.
+   */
+  public String getRouterId() {
+    return getAddress();
+  }
+
+  @Override
+  public boolean like(BaseRecord o) {
+    if (o instanceof RouterState) {
+      RouterState other = (RouterState)o;
+      if (getAddress() != null &&
+          !getAddress().equals(other.getAddress())) {
+        return false;
+      }
+      if (getStatus() != null &&
+          !getStatus().equals(other.getStatus())) {
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return getAddress() + " -> " + getStatus() + "," + getVersion();
+  }
+
+  @Override
+  public SortedMap<String, String> getPrimaryKeys() {
+    SortedMap<String, String> map = new TreeMap<>();
+    map.put("address", getAddress());
+    return map;
+  }
+
+  @Override
+  public void validate() {
+    super.validate();
+    if ((getAddress() == null || getAddress().length() == 0) &&
+        getStatus() != RouterServiceState.INITIALIZING) {
+      throw new IllegalArgumentException(
+          "Invalid router entry, no address specified " + this);
+    }
+  }
+
+  @Override
+  public int compareTo(BaseRecord other) {
+    if (other == null) {
+      return -1;
+    } else if (other instanceof RouterState) {
+      RouterState router = (RouterState) other;
+      return this.getAddress().compareTo(router.getAddress());
+    } else {
+      return super.compareTo(other);
+    }
+  }
+
+  @Override
+  public boolean checkExpired(long currentTime) {
+    if (super.checkExpired(currentTime)) {
+      setStatus(RouterServiceState.EXPIRED);
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public long getExpirationMs() {
+    return RouterState.expirationMs;
+  }
+
+  public static void setExpirationMs(long time) {
+    RouterState.expirationMs = time;
+  }
+}

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/StateStoreVersion.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/StateStoreVersion.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/StateStoreVersion.java
new file mode 100644
index 0000000..ce86eb0
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/StateStoreVersion.java
@@ -0,0 +1,91 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records;
+
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
+
+/**
+ * Entry to track the version of the State Store data stored in the State Store
+ * by a Router.
+ */
+public abstract class StateStoreVersion extends BaseRecord {
+
+  public static StateStoreVersion newInstance() {
+    return StateStoreSerializer.newRecord(StateStoreVersion.class);
+  }
+
+  public static StateStoreVersion newInstance(long membershipVersion,
+      long mountTableVersion) {
+    StateStoreVersion record = newInstance();
+    record.setMembershipVersion(membershipVersion);
+    record.setMountTableVersion(mountTableVersion);
+    return record;
+  }
+
+  public abstract long getMembershipVersion();
+
+  public abstract void setMembershipVersion(long version);
+
+  public abstract long getMountTableVersion();
+
+  public abstract void setMountTableVersion(long version);
+
+  @Override
+  public SortedMap<String, String> getPrimaryKeys() {
+    // This record is not stored directly, no key needed
+    SortedMap<String, String> map = new TreeMap<String, String>();
+    return map;
+  }
+
+  @Override
+  public long getExpirationMs() {
+    // This record is not stored directly, no expiration needed
+    return -1;
+  }
+
+  @Override
+  public void setDateModified(long time) {
+    // We don't store this record directly
+  }
+
+  @Override
+  public long getDateModified() {
+    // We don't store this record directly
+    return 0;
+  }
+
+  @Override
+  public void setDateCreated(long time) {
+    // We don't store this record directly
+  }
+
+  @Override
+  public long getDateCreated() {
+    // We don't store this record directly
+    return 0;
+  }
+
+  @Override
+  public String toString() {
+    return "Membership: " + getMembershipVersion() +
+        " Mount Table: " + getMountTableVersion();
+  }
+}

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatePBImpl.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatePBImpl.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatePBImpl.java
new file mode 100644
index 0000000..614957b
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatePBImpl.java
@@ -0,0 +1,335 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records.impl.pb;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipRecordProto;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipRecordProto.Builder;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipRecordProtoOrBuilder;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipStatsRecordProto;
+import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamenodeServiceState;
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.impl.pb.FederationProtocolPBTranslator;
+import org.apache.hadoop.hdfs.server.federation.store.records.MembershipState;
+import org.apache.hadoop.hdfs.server.federation.store.records.MembershipStats;
+
+import com.google.protobuf.Message;
+
+/**
+ * Protobuf implementation of the MembershipState record.
+ */
+public class MembershipStatePBImpl extends MembershipState implements PBRecord {
+
+  private FederationProtocolPBTranslator<NamenodeMembershipRecordProto, Builder,
+      NamenodeMembershipRecordProtoOrBuilder> translator =
+          new FederationProtocolPBTranslator<NamenodeMembershipRecordProto,
+              Builder, NamenodeMembershipRecordProtoOrBuilder>(
+                  NamenodeMembershipRecordProto.class);
+
+  public MembershipStatePBImpl() {
+  }
+
+  public MembershipStatePBImpl(NamenodeMembershipRecordProto proto) {
+    this.translator.setProto(proto);
+  }
+
+  @Override
+  public NamenodeMembershipRecordProto getProto() {
+    return this.translator.build();
+  }
+
+  @Override
+  public void setProto(Message proto) {
+    this.translator.setProto(proto);
+  }
+
+  @Override
+  public void readInstance(String base64String) throws IOException {
+    this.translator.readInstance(base64String);
+  }
+
+  @Override
+  public void setRouterId(String routerId) {
+    Builder builder = this.translator.getBuilder();
+    if (routerId == null) {
+      builder.clearRouterId();
+    } else {
+      builder.setRouterId(routerId);
+    }
+  }
+
+  @Override
+  public void setNameserviceId(String nameserviceId) {
+    Builder builder = this.translator.getBuilder();
+    if (nameserviceId == null) {
+      builder.clearNameserviceId();
+    } else {
+      builder.setNameserviceId(nameserviceId);
+    }
+  }
+
+  @Override
+  public void setNamenodeId(String namenodeId) {
+    Builder builder = this.translator.getBuilder();
+    if (namenodeId == null) {
+      builder.clearNamenodeId();
+    } else {
+      builder.setNamenodeId(namenodeId);
+    }
+  }
+
+  @Override
+  public void setWebAddress(String webAddress) {
+    Builder builder = this.translator.getBuilder();
+    if (webAddress == null) {
+      builder.clearWebAddress();
+    } else {
+      builder.setWebAddress(webAddress);
+    }
+  }
+
+  @Override
+  public void setRpcAddress(String rpcAddress) {
+    Builder builder = this.translator.getBuilder();
+    if (rpcAddress == null) {
+      builder.clearRpcAddress();
+    } else {
+      builder.setRpcAddress(rpcAddress);
+    }
+  }
+
+  @Override
+  public void setServiceAddress(String serviceAddress) {
+    this.translator.getBuilder().setServiceAddress(serviceAddress);
+  }
+
+  @Override
+  public void setLifelineAddress(String lifelineAddress) {
+    Builder builder = this.translator.getBuilder();
+    if (lifelineAddress == null) {
+      builder.clearLifelineAddress();
+    } else {
+      builder.setLifelineAddress(lifelineAddress);
+    }
+  }
+
+  @Override
+  public void setIsSafeMode(boolean isSafeMode) {
+    Builder builder = this.translator.getBuilder();
+    builder.setIsSafeMode(isSafeMode);
+  }
+
+  @Override
+  public void setClusterId(String clusterId) {
+    Builder builder = this.translator.getBuilder();
+    if (clusterId == null) {
+      builder.clearClusterId();
+    } else {
+      builder.setClusterId(clusterId);
+    }
+  }
+
+  @Override
+  public void setBlockPoolId(String blockPoolId) {
+    Builder builder = this.translator.getBuilder();
+    if (blockPoolId == null) {
+      builder.clearBlockPoolId();
+    } else {
+      builder.setBlockPoolId(blockPoolId);
+    }
+  }
+
+  @Override
+  public void setState(FederationNamenodeServiceState state) {
+    Builder builder = this.translator.getBuilder();
+    if (state == null) {
+      builder.clearState();
+    } else {
+      builder.setState(state.toString());
+    }
+  }
+
+  @Override
+  public String getRouterId() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasRouterId()) {
+      return null;
+    }
+    return proto.getRouterId();
+  }
+
+  @Override
+  public String getNameserviceId() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasNameserviceId()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getNameserviceId();
+  }
+
+  @Override
+  public String getNamenodeId() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasNamenodeId()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getNamenodeId();
+  }
+
+  @Override
+  public String getClusterId() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasClusterId()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getClusterId();
+  }
+
+  @Override
+  public String getBlockPoolId() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasBlockPoolId()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getBlockPoolId();
+  }
+
+  @Override
+  public String getRpcAddress() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasRpcAddress()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getRpcAddress();
+  }
+
+  @Override
+  public String getServiceAddress() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasServiceAddress()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getServiceAddress();
+  }
+
+  @Override
+  public String getWebAddress() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasWebAddress()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getWebAddress();
+  }
+
+  @Override
+  public String getLifelineAddress() {
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasLifelineAddress()) {
+      return null;
+    }
+    return this.translator.getProtoOrBuilder().getLifelineAddress();
+  }
+
+  @Override
+  public boolean getIsSafeMode() {
+    return this.translator.getProtoOrBuilder().getIsSafeMode();
+  }
+
+  @Override
+  public FederationNamenodeServiceState getState() {
+    FederationNamenodeServiceState ret =
+        FederationNamenodeServiceState.UNAVAILABLE;
+    NamenodeMembershipRecordProtoOrBuilder proto =
+        this.translator.getProtoOrBuilder();
+    if (!proto.hasState()) {
+      return null;
+    }
+    try {
+      ret = FederationNamenodeServiceState.valueOf(proto.getState());
+    } catch (IllegalArgumentException e) {
+      // Ignore this error
+    }
+    return ret;
+  }
+
+  @Override
+  public void setStats(MembershipStats stats) {
+    if (stats instanceof MembershipStatsPBImpl) {
+      MembershipStatsPBImpl statsPB = (MembershipStatsPBImpl)stats;
+      NamenodeMembershipStatsRecordProto statsProto =
+          (NamenodeMembershipStatsRecordProto)statsPB.getProto();
+      this.translator.getBuilder().setStats(statsProto);
+    }
+  }
+
+  @Override
+  public MembershipStats getStats() {
+    NamenodeMembershipStatsRecordProto statsProto =
+        this.translator.getProtoOrBuilder().getStats();
+    MembershipStats stats =
+        StateStoreSerializer.newRecord(MembershipStats.class);
+    if (stats instanceof MembershipStatsPBImpl) {
+      MembershipStatsPBImpl statsPB = (MembershipStatsPBImpl)stats;
+      statsPB.setProto(statsProto);
+      return statsPB;
+    } else {
+      throw new IllegalArgumentException(
+          "Cannot get stats for the membership");
+    }
+  }
+
+  @Override
+  public void setLastContact(long contact) {
+    this.translator.getBuilder().setLastContact(contact);
+  }
+
+  @Override
+  public long getLastContact() {
+    return this.translator.getProtoOrBuilder().getLastContact();
+  }
+
+  @Override
+  public void setDateModified(long time) {
+    this.translator.getBuilder().setDateModified(time);
+  }
+
+  @Override
+  public long getDateModified() {
+    return this.translator.getProtoOrBuilder().getDateModified();
+  }
+
+  @Override
+  public void setDateCreated(long time) {
+    this.translator.getBuilder().setDateCreated(time);
+  }
+
+  @Override
+  public long getDateCreated() {
+    return this.translator.getProtoOrBuilder().getDateCreated();
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/62a819d5/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatsPBImpl.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatsPBImpl.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatsPBImpl.java
new file mode 100644
index 0000000..9f0a167
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/impl/pb/MembershipStatsPBImpl.java
@@ -0,0 +1,191 @@
+/**
+ * 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.hadoop.hdfs.server.federation.store.records.impl.pb;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipStatsRecordProto;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipStatsRecordProto.Builder;
+import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.NamenodeMembershipStatsRecordProtoOrBuilder;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.impl.pb.FederationProtocolPBTranslator;
+import org.apache.hadoop.hdfs.server.federation.store.records.MembershipStats;
+
+import com.google.protobuf.Message;
+
+/**
+ * Protobuf implementation of the MembershipStats record.
+ */
+public class MembershipStatsPBImpl extends MembershipStats
+    implements PBRecord {
+
+  private FederationProtocolPBTranslator<NamenodeMembershipStatsRecordProto,
+      Builder, NamenodeMembershipStatsRecordProtoOrBuilder> translator =
+          new FederationProtocolPBTranslator<NamenodeMembershipStatsRecordProto,
+          Builder, NamenodeMembershipStatsRecordProtoOrBuilder>(
+              NamenodeMembershipStatsRecordProto.class);
+
+  public MembershipStatsPBImpl() {
+  }
+
+  @Override
+  public NamenodeMembershipStatsRecordProto getProto() {
+    return this.translator.build();
+  }
+
+  @Override
+  public void setProto(Message proto) {
+    this.translator.setProto(proto);
+  }
+
+  @Override
+  public void readInstance(String base64String) throws IOException {
+    this.translator.readInstance(base64String);
+  }
+
+  @Override
+  public void setTotalSpace(long space) {
+    this.translator.getBuilder().setTotalSpace(space);
+  }
+
+  @Override
+  public long getTotalSpace() {
+    return this.translator.getProtoOrBuilder().getTotalSpace();
+  }
+
+  @Override
+  public void setAvailableSpace(long space) {
+    this.translator.getBuilder().setAvailableSpace(space);
+  }
+
+  @Override
+  public long getAvailableSpace() {
+    return this.translator.getProtoOrBuilder().getAvailableSpace();
+  }
+
+  @Override
+  public void setNumOfFiles(long files) {
+    this.translator.getBuilder().setNumOfFiles(files);
+  }
+
+  @Override
+  public long getNumOfFiles() {
+    return this.translator.getProtoOrBuilder().getNumOfFiles();
+  }
+
+  @Override
+  public void setNumOfBlocks(long blocks) {
+    this.translator.getBuilder().setNumOfBlocks(blocks);
+  }
+
+  @Override
+  public long getNumOfBlocks() {
+    return this.translator.getProtoOrBuilder().getNumOfBlocks();
+  }
+
+  @Override
+  public void setNumOfBlocksMissing(long blocks) {
+    this.translator.getBuilder().setNumOfBlocksMissing(blocks);
+  }
+
+  @Override
+  public long getNumOfBlocksMissing() {
+    return this.translator.getProtoOrBuilder().getNumOfBlocksMissing();
+  }
+
+  @Override
+  public void setNumOfBlocksPendingReplication(long blocks) {
+    this.translator.getBuilder().setNumOfBlocksPendingReplication(blocks);
+  }
+
+  @Override
+  public long getNumOfBlocksPendingReplication() {
+    return this.translator.getProtoOrBuilder()
+        .getNumOfBlocksPendingReplication();
+  }
+
+  @Override
+  public void setNumOfBlocksUnderReplicated(long blocks) {
+    this.translator.getBuilder().setNumOfBlocksUnderReplicated(blocks);
+  }
+
+  @Override
+  public long getNumOfBlocksUnderReplicated() {
+    return this.translator.getProtoOrBuilder().getNumOfBlocksUnderReplicated();
+  }
+
+  @Override
+  public void setNumOfBlocksPendingDeletion(long blocks) {
+    this.translator.getBuilder().setNumOfBlocksPendingDeletion(blocks);
+  }
+
+  @Override
+  public long getNumOfBlocksPendingDeletion() {
+    return this.translator.getProtoOrBuilder().getNumOfBlocksPendingDeletion();
+  }
+
+  @Override
+  public void setNumOfActiveDatanodes(int nodes) {
+    this.translator.getBuilder().setNumOfActiveDatanodes(nodes);
+  }
+
+  @Override
+  public int getNumOfActiveDatanodes() {
+    return this.translator.getProtoOrBuilder().getNumOfActiveDatanodes();
+  }
+
+  @Override
+  public void setNumOfDeadDatanodes(int nodes) {
+    this.translator.getBuilder().setNumOfDeadDatanodes(nodes);
+  }
+
+  @Override
+  public int getNumOfDeadDatanodes() {
+    return this.translator.getProtoOrBuilder().getNumOfDeadDatanodes();
+  }
+
+  @Override
+  public void setNumOfDecommissioningDatanodes(int nodes) {
+    this.translator.getBuilder().setNumOfDecommissioningDatanodes(nodes);
+  }
+
+  @Override
+  public int getNumOfDecommissioningDatanodes() {
+    return this.translator.getProtoOrBuilder()
+        .getNumOfDecommissioningDatanodes();
+  }
+
+  @Override
+  public void setNumOfDecomActiveDatanodes(int nodes) {
+    this.translator.getBuilder().setNumOfDecomActiveDatanodes(nodes);
+  }
+
+  @Override
+  public int getNumOfDecomActiveDatanodes() {
+    return this.translator.getProtoOrBuilder().getNumOfDecomActiveDatanodes();
+  }
+
+  @Override
+  public void setNumOfDecomDeadDatanodes(int nodes) {
+    this.translator.getBuilder().setNumOfDecomDeadDatanodes(nodes);
+  }
+
+  @Override
+  public int getNumOfDecomDeadDatanodes() {
+    return this.translator.getProtoOrBuilder().getNumOfDecomDeadDatanodes();
+  }
+}
\ No newline at end of file


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