| /** |
| * 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.protocol; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.hdfs.DeprecatedUTF8; |
| import org.apache.hadoop.io.WritableComparable; |
| |
| /** |
| * DatanodeID is composed of the data node |
| * name (hostname:portNumber) and the data storage ID, |
| * which it currently represents. |
| * |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class DatanodeID implements WritableComparable<DatanodeID> { |
| public static final DatanodeID[] EMPTY_ARRAY = {}; |
| |
| public String name; /// hostname:portNumber |
| public String storageID; /// unique per cluster storageID |
| protected int infoPort; /// the port where the infoserver is running |
| public int ipcPort; /// the port where the ipc server is running |
| |
| /** Equivalent to DatanodeID(""). */ |
| public DatanodeID() {this("");} |
| |
| /** Equivalent to DatanodeID(nodeName, "", -1, -1). */ |
| public DatanodeID(String nodeName) {this(nodeName, "", -1, -1);} |
| |
| /** |
| * DatanodeID copy constructor |
| * |
| * @param from |
| */ |
| public DatanodeID(DatanodeID from) { |
| this(from.getName(), |
| from.getStorageID(), |
| from.getInfoPort(), |
| from.getIpcPort()); |
| } |
| |
| /** |
| * Create DatanodeID |
| * @param nodeName (hostname:portNumber) |
| * @param storageID data storage ID |
| * @param infoPort info server port |
| * @param ipcPort ipc server port |
| */ |
| public DatanodeID(String nodeName, String storageID, |
| int infoPort, int ipcPort) { |
| this.name = nodeName; |
| this.storageID = storageID; |
| this.infoPort = infoPort; |
| this.ipcPort = ipcPort; |
| } |
| |
| public void setName(String name) { |
| this.name = name; |
| } |
| |
| public void setInfoPort(int infoPort) { |
| this.infoPort = infoPort; |
| } |
| |
| public void setIpcPort(int ipcPort) { |
| this.ipcPort = ipcPort; |
| } |
| |
| /** |
| * @return hostname:portNumber. |
| */ |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * @return data storage ID. |
| */ |
| public String getStorageID() { |
| return this.storageID; |
| } |
| |
| /** |
| * @return infoPort (the port at which the HTTP server bound to) |
| */ |
| public int getInfoPort() { |
| return infoPort; |
| } |
| |
| /** |
| * @return ipcPort (the port at which the IPC server bound to) |
| */ |
| public int getIpcPort() { |
| return ipcPort; |
| } |
| |
| /** |
| * sets the data storage ID. |
| */ |
| public void setStorageID(String storageID) { |
| this.storageID = storageID; |
| } |
| |
| /** |
| * @return hostname and no :portNumber. |
| */ |
| public String getHost() { |
| int colon = name.indexOf(":"); |
| if (colon < 0) { |
| return name; |
| } else { |
| return name.substring(0, colon); |
| } |
| } |
| |
| public int getPort() { |
| int colon = name.indexOf(":"); |
| if (colon < 0) { |
| return 50010; // default port. |
| } |
| return Integer.parseInt(name.substring(colon+1)); |
| } |
| |
| public boolean equals(Object to) { |
| if (this == to) { |
| return true; |
| } |
| if (!(to instanceof DatanodeID)) { |
| return false; |
| } |
| return (name.equals(((DatanodeID)to).getName()) && |
| storageID.equals(((DatanodeID)to).getStorageID())); |
| } |
| |
| public int hashCode() { |
| return name.hashCode()^ storageID.hashCode(); |
| } |
| |
| public String toString() { |
| return name; |
| } |
| |
| /** |
| * Update fields when a new registration request comes in. |
| * Note that this does not update storageID. |
| */ |
| public void updateRegInfo(DatanodeID nodeReg) { |
| name = nodeReg.getName(); |
| infoPort = nodeReg.getInfoPort(); |
| ipcPort = nodeReg.getIpcPort(); |
| // update any more fields added in future. |
| } |
| |
| /** Comparable. |
| * Basis of compare is the String name (host:portNumber) only. |
| * @param that |
| * @return as specified by Comparable. |
| */ |
| public int compareTo(DatanodeID that) { |
| return name.compareTo(that.getName()); |
| } |
| |
| ///////////////////////////////////////////////// |
| // Writable |
| ///////////////////////////////////////////////// |
| /** {@inheritDoc} */ |
| public void write(DataOutput out) throws IOException { |
| DeprecatedUTF8.writeString(out, name); |
| DeprecatedUTF8.writeString(out, storageID); |
| out.writeShort(infoPort); |
| } |
| |
| /** {@inheritDoc} */ |
| public void readFields(DataInput in) throws IOException { |
| name = DeprecatedUTF8.readString(in); |
| storageID = DeprecatedUTF8.readString(in); |
| // the infoPort read could be negative, if the port is a large number (more |
| // than 15 bits in storage size (but less than 16 bits). |
| // So chop off the first two bytes (and hence the signed bits) before |
| // setting the field. |
| this.infoPort = in.readShort() & 0x0000ffff; |
| } |
| } |