Examples of org.apache.hadoop.hbase.zookeeper.MetaTableLocator

Package org.apache.hadoop.hbase.zookeeper

Examples of org.apache.hadoop.hbase.zookeeper.MetaTableLocator

org.apache.hadoop.hbase.zookeeper.MetaTableLocator
Utility class to perform operation (get/wait for/verify/set/delete) on znode in ZooKeeper which keeps hbase:meta region server location. Stateless class with a bunch of static methods. Doesn't manage resources passed in (e.g. HConnection, ZooKeeperWatcher etc). Meta region location is set by RegionServerServices. This class doesn't use ZK watchers, rather accesses ZK directly. This class it stateless. The only reason it's not made a non-instantiable util class with a collection of static methods is that it'd be rather hard to mock properly in tests. TODO: rewrite using RPC calls to master to find out about hbase:meta.

      thenThrow(new ServiceException(ex));


    long timeout = UTIL.getConfiguration().
            getLong("hbase.catalog.verification.timeout", 1000);
    MetaTableLocator.setMetaLocation(this.watcher, SN, RegionState.State.OPENING);
    assertFalse(new MetaTableLocator().verifyMetaRegionLocation(
      connection, watcher, timeout));


    MetaTableLocator.setMetaLocation(this.watcher, SN, RegionState.State.OPEN);
    assertFalse(new MetaTableLocator().verifyMetaRegionLocation(
            connection, watcher, timeout));
  }

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    ServerName sn = ServerName.valueOf("example.com", 1234, System.currentTimeMillis());
    MetaTableLocator.setMetaLocation(this.watcher,
            sn,
            RegionState.State.OPENING);
    assertFalse(new MetaTableLocator().verifyMetaRegionLocation(connection, watcher, 100));
    MetaTableLocator.setMetaLocation(this.watcher, sn, RegionState.State.OPEN);
    assertFalse(new MetaTableLocator().verifyMetaRegionLocation(connection, watcher, 100));
  }

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  }


  @Test (expected = NotAllMetaRegionsOnlineException.class)
  public void testTimeoutWaitForMeta()
  throws IOException, InterruptedException {
    new MetaTableLocator().waitMetaRegionLocation(watcher, 100);
  }

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   * @throws InterruptedException
   * @throws KeeperException
   */
  @Test public void testNoTimeoutWaitForMeta()
  throws IOException, InterruptedException, KeeperException {
    final MetaTableLocator mtl = new MetaTableLocator();
    ServerName hsa = mtl.getMetaRegionLocation(watcher);
    assertNull(hsa);


    // Now test waiting on meta location getting set.
    Thread t = new WaitOnMetaThread();
    startWaitAliveThenWaitItLives(t, 1);
    // Set a meta location.
    MetaTableLocator.setMetaLocation(this.watcher, SN, RegionState.State.OPEN);
    hsa = SN;
    // Join the thread... should exit shortly.
    t.join();
    // Now meta is available.
    assertTrue(mtl.getMetaRegionLocation(watcher).equals(hsa));
  }

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      LOG.info("Exiting " + getName());
    }


    void doWaiting() throws InterruptedException {
      try {
        while (new MetaTableLocator().waitMetaRegionLocation(watcher, 10000) == null);
      } catch (NotAllMetaRegionsOnlineException e) {
        //Ignore
      }
    }

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   */
  public Pair<Integer, Integer> getReopenStatus(TableName tableName)
      throws IOException {
    List<HRegionInfo> hris;
    if (TableName.META_TABLE_NAME.equals(tableName)) {
      hris = new MetaTableLocator().getMetaRegions(server.getZooKeeper());
    } else {
      hris = MetaTableAccessor.getTableRegions(server.getShortCircuitConnection(), tableName, true);
    }


    Integer pending = 0;

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    // Each region server will get its own online regions for the table.
    // We may still miss regions that need to be flushed.
    List<Pair<HRegionInfo, ServerName>> regionsAndLocations;
    try {
      if (TableName.META_TABLE_NAME.equals(tableName)) {
        regionsAndLocations = new MetaTableLocator().getMetaRegionsAndLocations(
          master.getZooKeeper());
      } else {
        regionsAndLocations = MetaTableAccessor.getTableRegionsAndLocations(
          master.getShortCircuitConnection(), tableName, false);
      }

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    ServerManager serverManager = ((HMaster)this.server).getServerManager();
    // Get the regions of this table. We're done when all listed
    // tables are onlined.
    List<Pair<HRegionInfo, ServerName>> tableRegionsAndLocations;
    if (TableName.META_TABLE_NAME.equals(tableName)) {
      tableRegionsAndLocations = new MetaTableLocator().getMetaRegionsAndLocations(
        server.getZooKeeper());
    } else {
      tableRegionsAndLocations = MetaTableAccessor.getTableRegionsAndLocations(
        server.getShortCircuitConnection(), tableName, true);
    }

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    tmpl.render(response.getWriter(),
          master, admin);
  }


  private ServerName getMetaLocationOrNull(HMaster master) {
    MetaTableLocator metaTableLocator = master.getMetaTableLocator();
    return metaTableLocator == null ? null :
      metaTableLocator.getMetaRegionLocation(master.getZooKeeper());
  }

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      LOG.info("Handling table operation " + eventType + " on table " +
          tableName);


      List<HRegionInfo> hris;
      if (TableName.META_TABLE_NAME.equals(tableName)) {
        hris = new MetaTableLocator().getMetaRegions(server.getZooKeeper());
      } else {
        hris = MetaTableAccessor.getTableRegions(server.getShortCircuitConnection(), tableName);
      }
      handleTableOperation(hris);
      if (eventType.isOnlineSchemaChangeSupported() && this.masterServices.

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