Examples of org.apache.hadoop.hbase.ServerName

org.apache.hadoop.hbase.ServerName
Instance of an HBase ServerName. A server name is used uniquely identifying a server instance in a cluster and is made of the combination of hostname, port, and startcode. The startcode distingushes restarted servers on same hostname and port (startcode is usually timestamp of server startup). The {@link #toString()} format of ServerName is safe to use in the filesystem and as znode nameup in ZooKeeper. Its format is: <hostname> ' {@link #SERVERNAME_SEPARATOR}' <port> ' {@link #SERVERNAME_SEPARATOR}' <startcode>. For example, if hostname is www.example.org, port is 1234, and the startcode for the regionserver is 1212121212, then the {@link #toString()} would be www.example.org,1234,1212121212.
You can obtain a versioned serialized form of this class by calling {@link #getVersionedBytes()}. To deserialize, call {@link #parseVersionedServerName(byte[])}
Immutable.

      int initialServerIndex = cluster.initialRegionIndexToServerIndex[regionIndex];
      int newServerIndex = cluster.regionIndexToServerIndex[regionIndex];


      if (initialServerIndex != newServerIndex) {
        HRegionInfo region = cluster.regions[regionIndex];
        ServerName initialServer = cluster.servers[initialServerIndex];
        ServerName newServer = cluster.servers[newServerIndex];


        if (LOG.isTraceEnabled()) {
          LOG.trace("Moving Region " + region.getEncodedName() + " from server "
              + initialServer.getHostname() + " to " + newServer.getHostname());
        }
        RegionPlan rp = new RegionPlan(region, initialServer, newServer);
        plans.add(rp);
      }
    }

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      this.gate = gate;
    }


    @Override
    public ServerName randomAssignment(HRegionInfo regionInfo, List<ServerName> servers) {
      ServerName randomServerName = super.randomAssignment(regionInfo, servers);
      this.gate.set(true);
      return randomServerName;
    }

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    LOG.info(TestRegionObserverInterface.class.getName() +".testRecovery");
    TableName tableName = TableName.valueOf(TEST_TABLE.getNameAsString() + ".testRecovery");
    HTable table = util.createTable(tableName, new byte[][] {A, B, C});
    try {
      JVMClusterUtil.RegionServerThread rs1 = cluster.startRegionServer();
      ServerName sn2 = rs1.getRegionServer().getServerName();
      String regEN = table.getRegionLocations().firstEntry().getKey().getEncodedName();


      util.getHBaseAdmin().move(regEN.getBytes(), sn2.getServerName().getBytes());
      while (!sn2.equals(table.getRegionLocations().firstEntry().getValue() )){
        Thread.sleep(100);
      }


      Put put = new Put(ROW);
      put.add(A, A, A);

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    LOG.info(TestRegionObserverInterface.class.getName() + ".testPreWALRestoreSkip");
    TableName tableName = TableName.valueOf(SimpleRegionObserver.TABLE_SKIPPED);
    HTable table = util.createTable(tableName, new byte[][] { A, B, C });


    JVMClusterUtil.RegionServerThread rs1 = cluster.startRegionServer();
    ServerName sn2 = rs1.getRegionServer().getServerName();
    String regEN = table.getRegionLocations().firstEntry().getKey().getEncodedName();


    util.getHBaseAdmin().move(regEN.getBytes(), sn2.getServerName().getBytes());
    while (!sn2.equals(table.getRegionLocations().firstEntry().getValue())) {
      Thread.sleep(100);
    }


    Put put = new Put(ROW);
    put.add(A, A, A);

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  protected void verifyRoundRobinDistribution(HTable ht, int expectedRegions) throws IOException {
    int numRS = ht.getConnection().getCurrentNrHRS();
    Map<HRegionInfo, ServerName> regions = ht.getRegionLocations();
    Map<ServerName, List<HRegionInfo>> server2Regions = new HashMap<ServerName, List<HRegionInfo>>();
    for (Map.Entry<HRegionInfo, ServerName> entry : regions.entrySet()) {
      ServerName server = entry.getValue();
      List<HRegionInfo> regs = server2Regions.get(server);
      if (regs == null) {
        regs = new ArrayList<HRegionInfo>();
        server2Regions.put(server, regs);
      }

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    List<HRegionInfo> tableRegions = localAdmin.getTableRegions(tableName);
    HRegionInfo hri = tableRegions.get(0);
    AssignmentManager am = master.getAssignmentManager();
    assertTrue("Region " + hri.getRegionNameAsString()
      + " should be assigned properly", am.waitForAssignment(hri));
    ServerName server = am.getRegionStates().getRegionServerOfRegion(hri);
    localAdmin.move(hri.getEncodedNameAsBytes(), Bytes.toBytes(server.getServerName()));
    assertEquals("Current region server and region server before move should be same.", server,
      am.getRegionStates().getRegionServerOfRegion(hri));
  }

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            table.getRegionLocations();
        List<TRegionInfo> results = new ArrayList<TRegionInfo>();
        for (Map.Entry<HRegionInfo, ServerName> entry :
            regionLocations.entrySet()) {
          HRegionInfo info = entry.getKey();
          ServerName serverName = entry.getValue();
          TRegionInfo region = new TRegionInfo();
          region.serverName = ByteBuffer.wrap(
              Bytes.toBytes(serverName.getHostname()));
          region.port = serverName.getPort();
          region.startKey = ByteBuffer.wrap(info.getStartKey());
          region.endKey = ByteBuffer.wrap(info.getEndKey());
          region.id = info.getRegionId();
          region.name = ByteBuffer.wrap(info.getRegionName());
          region.version = info.getVersion();

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      for (Map.Entry<Writable, Writable> e :c.entrySet()) {
        String key = e.getKey().toString();
        // The hostname the master sees us as.
        if (key.equals(HConstants.KEY_FOR_HOSTNAME_SEEN_BY_MASTER)) {
          String hostnameFromMasterPOV = e.getValue().toString();
          this.serverNameFromMasterPOV = new ServerName(hostnameFromMasterPOV,
            this.isa.getPort(), this.startcode);
          LOG.info("Master passed us hostname to use. Was=" +
            this.isa.getHostName() + ", Now=" +
            this.serverNameFromMasterPOV.getHostname());
          continue;

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   * block by requesting the server stop.
   *
   * @return master + port, or null if server has been stopped
   */
  private ServerName getMaster() {
    ServerName masterServerName = null;
    long previousLogTime = 0;
    HMasterRegionInterface master = null;
    while (keepLooping() && master == null) {
      masterServerName = this.masterAddressManager.getMasterAddress();
      if (masterServerName == null) {
        if (!keepLooping()) {
          // give up with no connection.
          LOG.debug("No master found and cluster is stopped; bailing out");
          return null;
        }
        LOG.debug("No master found; retry");
        previousLogTime = System.currentTimeMillis();


        sleeper.sleep();
        continue;
      }


      InetSocketAddress isa =
        new InetSocketAddress(masterServerName.getHostname(), masterServerName.getPort());


      LOG.info("Attempting connect to Master server at " +
        this.masterAddressManager.getMasterAddress());
      try {
        // Do initial RPC setup. The final argument indicates that the RPC

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   * null if we failed to register.
   * @throws IOException
   */
  private MapWritable reportForDuty() throws IOException {
    MapWritable result = null;
    ServerName masterServerName = getMaster();
    if (masterServerName == null) return result;
    try {
      this.requestCount.set(0);
      LOG.info("Telling master at " + masterServerName + " that we are up " +
        "with port=" + this.isa.getPort() + ", startcode=" + this.startcode);

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