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/**
* 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 com.google.protobuf.ByteString;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import com.google.common.annotations.VisibleForTesting;
import java.net.InetSocketAddress;
/**
* This class represents the primary identifier for a Datanode.
* Datanodes are identified by how they can be contacted (hostname
* and ports) and their storage ID, a unique number that associates
* the Datanodes blocks with a particular Datanode.
*
* {@link DatanodeInfo#getName()} should be used to get the network
* location (for topology) of a datanode, instead of using
* {@link DatanodeID#getXferAddr()} here. Helpers are defined below
* for each context in which a DatanodeID is used.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class DatanodeID implements Comparable {
public static final DatanodeID[] EMPTY_ARRAY = {};
public static final DatanodeID EMPTY_DATANODE_ID = new DatanodeID("null",
"null", "null", 0, 0, 0, 0);
private String ipAddr; // IP address
private ByteString ipAddrBytes; // ipAddr ByteString to save on PB serde
private String hostName; // hostname claimed by datanode
private ByteString hostNameBytes; // hostName ByteString to save on PB serde
private String peerHostName; // hostname from the actual connection
private int xferPort; // data streaming port
private int infoPort; // info server port
private int infoSecurePort; // info server port
private int ipcPort; // IPC server port
private String xferAddr;
/**
* UUID identifying a given datanode. For upgraded Datanodes this is the
* same as the StorageID that was previously used by this Datanode.
* For newly formatted Datanodes it is a UUID.
*/
private final String datanodeUuid;
// datanodeUuid ByteString to save on PB serde
private final ByteString datanodeUuidBytes;
public DatanodeID(DatanodeID from) {
this(from.getDatanodeUuid(), from);
}
@VisibleForTesting
public DatanodeID(String datanodeUuid, DatanodeID from) {
this(from.getIpAddr(),
from.getIpAddrBytes(),
from.getHostName(),
from.getHostNameBytes(),
datanodeUuid,
getByteString(datanodeUuid),
from.getXferPort(),
from.getInfoPort(),
from.getInfoSecurePort(),
from.getIpcPort());
this.peerHostName = from.getPeerHostName();
}
/**
* Create a DatanodeID
* @param ipAddr IP
* @param hostName hostname
* @param datanodeUuid data node ID, UUID for new Datanodes, may be the
* storage ID for pre-UUID datanodes. NULL if unknown
* e.g. if this is a new datanode. A new UUID will
* be assigned by the namenode.
* @param xferPort data transfer port
* @param infoPort info server port
* @param ipcPort ipc server port
*/
public DatanodeID(String ipAddr, String hostName, String datanodeUuid,
int xferPort, int infoPort, int infoSecurePort, int ipcPort) {
this(ipAddr, getByteString(ipAddr),
hostName, getByteString(hostName),
datanodeUuid, getByteString(datanodeUuid),
xferPort, infoPort, infoSecurePort, ipcPort);
}
private DatanodeID(String ipAddr, ByteString ipAddrBytes,
String hostName, ByteString hostNameBytes,
String datanodeUuid, ByteString datanodeUuidBytes,
int xferPort, int infoPort, int infoSecurePort, int ipcPort) {
setIpAndXferPort(ipAddr, ipAddrBytes, xferPort);
this.hostName = hostName;
this.hostNameBytes = hostNameBytes;
this.datanodeUuid = checkDatanodeUuid(datanodeUuid);
this.datanodeUuidBytes = datanodeUuidBytes;
this.infoPort = infoPort;
this.infoSecurePort = infoSecurePort;
this.ipcPort = ipcPort;
}
private static ByteString getByteString(String str) {
if (str != null) {
return ByteString.copyFromUtf8(str);
}
return ByteString.EMPTY;
}
public void setIpAddr(String ipAddr) {
//updated during registration, preserve former xferPort
setIpAndXferPort(ipAddr, getByteString(ipAddr), xferPort);
}
private void setIpAndXferPort(String ipAddr, ByteString ipAddrBytes,
int xferPort) {
// build xferAddr string to reduce cost of frequent use
this.ipAddr = ipAddr;
this.ipAddrBytes = ipAddrBytes;
this.xferPort = xferPort;
this.xferAddr = ipAddr + ":" + xferPort;
}
public void setPeerHostName(String peerHostName) {
this.peerHostName = peerHostName;
}
/**
* @return data node ID.
*/
public String getDatanodeUuid() {
return datanodeUuid;
}
public ByteString getDatanodeUuidBytes() {
return datanodeUuidBytes;
}
private String checkDatanodeUuid(String uuid) {
if (uuid == null || uuid.isEmpty()) {
return null;
} else {
return uuid;
}
}
/**
* @return ipAddr;
*/
public String getIpAddr() {
return ipAddr;
}
public ByteString getIpAddrBytes() {
return ipAddrBytes;
}
/**
* @return hostname
*/
public String getHostName() {
return hostName;
}
public ByteString getHostNameBytes() {
return hostNameBytes;
}
/**
* @return hostname from the actual connection
*/
public String getPeerHostName() {
return peerHostName;
}
/**
* @return IP:xferPort string
*/
public String getXferAddr() {
return xferAddr;
}
/**
* @return IP:ipcPort string
*/
private String getIpcAddr() {
return ipAddr + ":" + ipcPort;
}
/**
* @return IP:infoPort string
*/
public String getInfoAddr() {
return ipAddr + ":" + infoPort;
}
/**
* @return IP:infoPort string
*/
public String getInfoSecureAddr() {
return ipAddr + ":" + infoSecurePort;
}
/**
* @return hostname:xferPort
*/
public String getXferAddrWithHostname() {
return hostName + ":" + xferPort;
}
/**
* @return hostname:ipcPort
*/
private String getIpcAddrWithHostname() {
return hostName + ":" + ipcPort;
}
/**
* @param useHostname true to use the DN hostname, use the IP otherwise
* @return name:xferPort
*/
public String getXferAddr(boolean useHostname) {
return useHostname ? getXferAddrWithHostname() : getXferAddr();
}
/**
* @param useHostname true to use the DN hostname, use the IP otherwise
* @return name:ipcPort
*/
public String getIpcAddr(boolean useHostname) {
return useHostname ? getIpcAddrWithHostname() : getIpcAddr();
}
/**
* @return xferPort (the port for data streaming)
*/
public int getXferPort() {
return xferPort;
}
/**
* @return infoPort (the port at which the HTTP server bound to)
*/
public int getInfoPort() {
return infoPort;
}
/**
* @return infoSecurePort (the port at which the HTTPS server bound to)
*/
public int getInfoSecurePort() {
return infoSecurePort;
}
/**
* @return ipcPort (the port at which the IPC server bound to)
*/
public int getIpcPort() {
return ipcPort;
}
@Override
public boolean equals(Object to) {
return this == to ||
(to instanceof DatanodeID &&
getXferAddr().equals(((DatanodeID) to).getXferAddr()) &&
datanodeUuid.equals(((DatanodeID) to).getDatanodeUuid()));
}
@Override
public int hashCode() {
return datanodeUuid.hashCode();
}
@Override
public String toString() {
return getXferAddr();
}
/**
* Update fields when a new registration request comes in.
* Note that this does not update storageID.
*/
public void updateRegInfo(DatanodeID nodeReg) {
setIpAndXferPort(nodeReg.getIpAddr(), nodeReg.getIpAddrBytes(),
nodeReg.getXferPort());
hostName = nodeReg.getHostName();
peerHostName = nodeReg.getPeerHostName();
infoPort = nodeReg.getInfoPort();
infoSecurePort = nodeReg.getInfoSecurePort();
ipcPort = nodeReg.getIpcPort();
}
/**
* Compare based on data transfer address.
*
* @param that datanode to compare with
* @return as specified by Comparable
*/
@Override
public int compareTo(DatanodeID that) {
return getXferAddr().compareTo(that.getXferAddr());
}
public InetSocketAddress getResolvedAddress() {
return new InetSocketAddress(this.getIpAddr(), this.getXferPort());
}
}
