Java Code Examples for org.apache.hadoop.hive.metastore.api.LockState

The following examples show how to use org.apache.hadoop.hive.metastore.api.LockState. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: iceberg   Source File: HiveTableOperations.java    License: Apache License 2.0 6 votes vote down vote up
private long acquireLock() throws UnknownHostException, TException {
  final LockComponent lockComponent = new LockComponent(LockType.EXCLUSIVE, LockLevel.TABLE, database);
  lockComponent.setTablename(tableName);
  final LockRequest lockRequest = new LockRequest(Lists.newArrayList(lockComponent),
          System.getProperty("user.name"),
          InetAddress.getLocalHost().getHostName());
  LockResponse lockResponse = metaStoreClient.lock(lockRequest);
  LockState state = lockResponse.getState();
  long lockId = lockResponse.getLockid();
  //TODO add timeout
  while (state.equals(LockState.WAITING)) {
    lockResponse = metaStoreClient.check_lock(new CheckLockRequest(lockResponse.getLockid()));
    state = lockResponse.getState();
  }

  if (!state.equals(LockState.ACQUIRED)) {
    throw new CommitFailedException(format("Could not acquire the lock on %s.%s, " +
            "lock request ended in state %s", database, tableName, state));
  }
  return lockId;
}
 
Example 2
Source Project: iceberg   Source File: HiveTableOperations.java    License: Apache License 2.0 5 votes vote down vote up
private long acquireLock() throws UnknownHostException, TException, InterruptedException {
  final LockComponent lockComponent = new LockComponent(LockType.EXCLUSIVE, LockLevel.TABLE, database);
  lockComponent.setTablename(tableName);
  final LockRequest lockRequest = new LockRequest(Lists.newArrayList(lockComponent),
      System.getProperty("user.name"),
      InetAddress.getLocalHost().getHostName());
  LockResponse lockResponse = metaClients.run(client -> client.lock(lockRequest));
  LockState state = lockResponse.getState();
  long lockId = lockResponse.getLockid();

  final long start = System.currentTimeMillis();
  long duration = 0;
  boolean timeout = false;
  while (!timeout && state.equals(LockState.WAITING)) {
    lockResponse = metaClients.run(client -> client.checkLock(lockId));
    state = lockResponse.getState();

    // check timeout
    duration = System.currentTimeMillis() - start;
    if (duration > lockAcquireTimeout) {
      timeout = true;
    } else {
      Thread.sleep(50);
    }
  }

  // timeout and do not have lock acquired
  if (timeout && !state.equals(LockState.ACQUIRED)) {
    throw new CommitFailedException(String.format("Timed out after %s ms waiting for lock on %s.%s",
        duration, database, tableName));
  }

  if (!state.equals(LockState.ACQUIRED)) {
    throw new CommitFailedException(String.format("Could not acquire the lock on %s.%s, " +
        "lock request ended in state %s", database, tableName, state));
  }
  return lockId;
}