LockManager

All Superinterfaces:: AutoCloseable

All Known Implementing Classes:: DynamoDbLockManager, LockManagers.BaseLockManager

public interface LockManager extends AutoCloseable

An interface for locking, used to ensure commit isolation.

Method Summary

Modifier and Type

Method

Description

boolean

acquire(String entityId, String ownerId)

Try to acquire a lock

void

initialize(Map<String,String> properties)

Initialize lock manager from catalog properties.

boolean

release(String entityId, String ownerId)

Release a lock

Methods inherited from interface java.lang.AutoCloseable
close

Method Details
- acquire
  
  boolean acquire(String entityId, String ownerId)
  
  Try to acquire a lock
  
  Parameters:
  
  entityId - ID of the entity to lock
  
  ownerId - ID of the owner if the lock
  
  Returns:
  
  if the lock for the entity is acquired by the owner
- release
  
  boolean release(String entityId, String ownerId)
  
  Release a lock
  exception must not be thrown for this method.
  
  Parameters:
  
  entityId - ID of the entity to lock
  
  ownerId - ID of the owner if the lock
  
  Returns:
  
  if the owner held the lock and successfully released it.
- initialize
  
  void initialize(Map<String,String> properties)
  
  Initialize lock manager from catalog properties.
  
  Parameters:
  
  properties - catalog properties