Java HBaseAdmin.isTableAvailable方法代碼示例

import org.apache.hadoop.hbase.client.HBaseAdmin; //導入方法依賴的package包/類
/**
 * Canary entry point for specified table.
 * @throws Exception
 */
private static void sniff(final HBaseAdmin admin, final Sink sink, String tableName)
    throws Exception {
  if (admin.isTableAvailable(tableName)) {
    sniff(admin, sink, admin.getTableDescriptor(tableName.getBytes()));
  } else {
    LOG.warn(String.format("Table %s is not available", tableName));
  }
}
 

import org.apache.hadoop.hbase.client.HBaseAdmin; //導入方法依賴的package包/類
public void waitTableAvailable(HBaseAdmin admin, byte[] table, long timeoutMillis)
throws InterruptedException, IOException {
  long startWait = System.currentTimeMillis();
  while (!admin.isTableAvailable(table)) {
    assertTrue("Timed out waiting for table to become available " +
      Bytes.toStringBinary(table),
      System.currentTimeMillis() - startWait < timeoutMillis);
    Thread.sleep(200);
  }
}
 

import org.apache.hadoop.hbase.client.HBaseAdmin; //導入方法依賴的package包/類
private void testSplitBeforeSettingSplittingInZK(boolean nodeCreated) throws Exception {
  final byte[] tableName = Bytes.toBytes("testSplitBeforeSettingSplittingInZK");
  
  HBaseAdmin admin = new HBaseAdmin(TESTING_UTIL.getConfiguration());
  // Create table then get the single region for our new table.
  HTableDescriptor htd = new HTableDescriptor(tableName);
  htd.addFamily(new HColumnDescriptor("cf"));
  admin.createTable(htd);

  List<HRegion> regions = null;
  for (int i=0; i<100; i++) {
    regions = cluster.getRegions(tableName);
    if (regions.size() > 0) break;
    Thread.sleep(100);
  }
  int regionServerIndex = cluster.getServerWith(regions.get(0).getRegionName());
  HRegionServer regionServer = cluster.getRegionServer(regionServerIndex);
  SplitTransaction st = null;
  if (nodeCreated) {
    st = new MockedSplitTransaction(regions.get(0), null) {
      @Override
      int transitionNodeSplitting(ZooKeeperWatcher zkw, HRegionInfo parent,
          ServerName serverName, int version) throws KeeperException, IOException {
        throw new TransitionToSplittingFailedException();
      }
    };
  } else {
    st = new MockedSplitTransaction(regions.get(0), null) {
      @Override
      void createNodeSplitting(ZooKeeperWatcher zkw, HRegionInfo region, ServerName serverName)
          throws KeeperException, IOException {
        throw new SplittingNodeCreationFailedException ();
      }
    };
  }
  String node = ZKAssign.getNodeName(regionServer.getZooKeeper(), regions.get(0)
      .getRegionInfo().getEncodedName());
  // make sure the client is uptodate
  regionServer.getZooKeeper().sync(node);
  for (int i = 0; i < 100; i++) {
    // We expect the znode to be deleted by this time. Here the znode could be in OPENED state and the 
    // master has not yet deleted the znode.
    if (ZKUtil.checkExists(regionServer.getZooKeeper(), node) != -1) {
      Thread.sleep(100);
    }
  }
  
  try {
    st.execute(regionServer, regionServer);
  } catch (IOException e) {
    // check for the specific instance in case the Split failed due to the existence of the znode in OPENED state.
    // This will at least make the test to fail;
    if (nodeCreated) {
      assertTrue("Should be instance of TransitionToSplittingFailedException",
          e instanceof TransitionToSplittingFailedException);
    } else {
      assertTrue("Should be instance of CreateSplittingNodeFailedException",
          e instanceof SplittingNodeCreationFailedException );
    }
    node = ZKAssign.getNodeName(regionServer.getZooKeeper(), regions.get(0)
        .getRegionInfo().getEncodedName());
    // make sure the client is uptodate
    regionServer.getZooKeeper().sync(node);
    if (nodeCreated) {
      assertFalse(ZKUtil.checkExists(regionServer.getZooKeeper(), node) == -1);
    } else {
      assertTrue(ZKUtil.checkExists(regionServer.getZooKeeper(), node) == -1);
    }
    assertTrue(st.rollback(regionServer, regionServer));
    assertTrue(ZKUtil.checkExists(regionServer.getZooKeeper(), node) == -1);
  }
  if (admin.isTableAvailable(tableName) && admin.isTableEnabled(tableName)) {
    admin.disableTable(tableName);
    admin.deleteTable(tableName);
  }
}
 

import org.apache.hadoop.hbase.client.HBaseAdmin; //導入方法依賴的package包/類
@Test
public void testShouldClearRITWhenNodeFoundInSplittingState() throws Exception {
  final byte[] tableName = Bytes.toBytes("testShouldClearRITWhenNodeFoundInSplittingState");
  HBaseAdmin admin = new HBaseAdmin(TESTING_UTIL.getConfiguration());
  // Create table then get the single region for our new table.
  HTableDescriptor htd = new HTableDescriptor(tableName);
  htd.addFamily(new HColumnDescriptor("cf"));
  admin.createTable(htd);
  for (int i = 0; cluster.getRegions(tableName).size() == 0 && i < 100; i++) {
    Thread.sleep(100);
  }
  assertTrue("Table not online", cluster.getRegions(tableName).size() != 0);

  HRegion region = cluster.getRegions(tableName).get(0);
  int regionServerIndex = cluster.getServerWith(region.getRegionName());
  HRegionServer regionServer = cluster.getRegionServer(regionServerIndex);
  SplitTransaction st = null;

  st = new MockedSplitTransaction(region, null) {
    @Override
    void createSplitDir(FileSystem fs, Path splitdir) throws IOException {
      throw new IOException("");
    }
  };

  try {
    st.execute(regionServer, regionServer);
  } catch (IOException e) {
    String node = ZKAssign.getNodeName(regionServer.getZooKeeper(), region
        .getRegionInfo().getEncodedName());

    assertFalse(ZKUtil.checkExists(regionServer.getZooKeeper(), node) == -1);
    AssignmentManager am = cluster.getMaster().getAssignmentManager();
    for (int i = 0; !am.getRegionsInTransition().containsKey(
        region.getRegionInfo().getEncodedName())
        && i < 100; i++) {
      Thread.sleep(200);
    }
    assertTrue("region is not in transition "+region,
        am.getRegionsInTransition().containsKey(region.getRegionInfo().getEncodedName()));
    RegionState regionState = am.getRegionsInTransition().get(region.getRegionInfo()
        .getEncodedName());
    assertTrue(regionState.getState() == RegionState.State.SPLITTING);
    assertTrue(st.rollback(regionServer, regionServer));
    assertTrue(ZKUtil.checkExists(regionServer.getZooKeeper(), node) == -1);
    for (int i=0; am.getRegionsInTransition().containsKey(region.getRegionInfo().getEncodedName()) && i<100; i++) {
      // Just in case the nodeDeleted event did not get executed.
      Thread.sleep(200);
    }
    assertFalse("region is still in transition",
        am.getRegionsInTransition().containsKey(region.getRegionInfo().getEncodedName()));
  }
  if (admin.isTableAvailable(tableName) && admin.isTableEnabled(tableName)) {
    admin.disableTable(tableName);
    admin.deleteTable(tableName);
    admin.close();
  }
}