org.apache.iceberg.aws.dynamodb

Class DynamoDbLockManager

java.lang.Object

org.apache.iceberg.util.LockManagers.BaseLockManager

org.apache.iceberg.aws.dynamodb.DynamoDbLockManager

All Implemented Interfaces:

java.lang.AutoCloseable, LockManager

public class DynamoDbLockManager
extends LockManagers.BaseLockManager

DynamoDB implementation for the lock manager.

Constructor Summary

Constructors

Constructor and Description
DynamoDbLockManager() constructor for dynamic initialization, initialize(Map) must be called later.
DynamoDbLockManager(software.amazon.awssdk.services.dynamodb.DynamoDbClient dynamo, java.lang.String lockTableName) constructor used for testing purpose

Method Summary

Modifier and Type	Method and Description
boolean	acquire(java.lang.String entityId, java.lang.String ownerId) Try to acquire a lock
void	close()
void	initialize(java.util.Map<java.lang.String,java.lang.String> properties) Initialize lock manager from catalog properties.
static java.util.List<software.amazon.awssdk.services.dynamodb.model.AttributeDefinition>	lockTableColDefinitions() The lock table column definition, for users who whould like to create the table separately
static java.util.List<software.amazon.awssdk.services.dynamodb.model.KeySchemaElement>	lockTableSchema() The lock table schema, for users who would like to create the table separately
boolean	release(java.lang.String entityId, java.lang.String ownerId) Release a lock

Methods inherited from class org.apache.iceberg.util.LockManagers.BaseLockManager

acquireIntervalMs, acquireTimeoutMs, heartbeatIntervalMs, heartbeatThreads, heartbeatTimeoutMs, scheduler

Methods inherited from class java.lang.Object

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

Constructor Detail

DynamoDbLockManager

public DynamoDbLockManager()

constructor for dynamic initialization, initialize(Map) must be called later.

DynamoDbLockManager

public DynamoDbLockManager(software.amazon.awssdk.services.dynamodb.DynamoDbClient dynamo,
                           java.lang.String lockTableName)

constructor used for testing purpose

Parameters:

dynamo - dynamo client

lockTableName - lock table name

Method Detail

initialize

public void initialize(java.util.Map<java.lang.String,java.lang.String> properties)

Description copied from interface: LockManager

Initialize lock manager from catalog properties.

Specified by:

initialize in interface LockManager

Overrides:

initialize in class LockManagers.BaseLockManager

Parameters:

properties - catalog properties

acquire

public boolean acquire(java.lang.String entityId,
                       java.lang.String ownerId)

Description copied from interface: LockManager

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

public boolean release(java.lang.String entityId,
                       java.lang.String ownerId)

Description copied from interface: LockManager

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.

close

public void close()

lockTableSchema

public static java.util.List<software.amazon.awssdk.services.dynamodb.model.KeySchemaElement> lockTableSchema()

The lock table schema, for users who would like to create the table separately

Returns:

lock table schema

lockTableColDefinitions

public static java.util.List<software.amazon.awssdk.services.dynamodb.model.AttributeDefinition> lockTableColDefinitions()

The lock table column definition, for users who whould like to create the table separately

Returns:

lock table column definition