org.apache.hive.hcatalog.streaming.mutate.client.lock

Class Lock

java.lang.Object

org.apache.hive.hcatalog.streaming.mutate.client.lock.Lock

public class Lock
extends Object

Manages the state required to safely read/write from/to an ACID table.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Lock.Options Constructs a lock options for a set of Hive ACID tables from which we wish to read.

Constructor Summary

Constructors

Constructor and Description
Lock(IMetaStoreClient metaStoreClient, Lock.Options options)

Method Summary

Modifier and Type	Method and Description
void	acquire() Attempts to acquire a read lock on the table, returns if successful, throws exception otherwise.
void	acquire(long transactionId) Attempts to acquire a read lock on the table, returns if successful, throws exception otherwise.
String	getUser()
void	release() Attempts to release the read lock on the table.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Lock

public Lock(IMetaStoreClient metaStoreClient,
            Lock.Options options)

Method Detail

acquire

public void acquire()
             throws LockException

Attempts to acquire a read lock on the table, returns if successful, throws exception otherwise.

Throws:

LockException

acquire

public void acquire(long transactionId)
             throws LockException

Attempts to acquire a read lock on the table, returns if successful, throws exception otherwise.

Throws:

LockException

release

public void release()
             throws LockException

Attempts to release the read lock on the table. Throws an exception if the lock failed at any point.

Throws:

LockException

getUser

public String getUser()

toString

public String toString()

Overrides:

toString in class Object