org.apache.hudi.client.transaction

Class SimpleConcurrentFileWritesConflictResolutionStrategy

java.lang.Object

org.apache.hudi.client.transaction.SimpleConcurrentFileWritesConflictResolutionStrategy

All Implemented Interfaces:

ConflictResolutionStrategy

Direct Known Subclasses:

BucketIndexConcurrentFileWritesConflictResolutionStrategy, PreferWriterConflictResolutionStrategy

public class SimpleConcurrentFileWritesConflictResolutionStrategy
extends Object
implements ConflictResolutionStrategy

This class is a basic implementation of a conflict resolution strategy for concurrent writes ConflictResolutionStrategy.

Constructor Summary

Constructors

Constructor and Description
SimpleConcurrentFileWritesConflictResolutionStrategy()

Method Summary

Modifier and Type	Method and Description
Stream<HoodieInstant>	getCandidateInstants(HoodieTableMetaClient metaClient, HoodieInstant currentInstant, Option<HoodieInstant> lastSuccessfulInstant) Stream of instants to check conflicts against.
boolean	hasConflict(ConcurrentOperation thisOperation, ConcurrentOperation otherOperation) Implementations of this method will determine whether a conflict exists between 2 commits.
boolean	isPreCommitRequired() Write clients uses their preCommit API to run conflict resolution.
Option<HoodieCommitMetadata>	resolveConflict(HoodieTable table, ConcurrentOperation thisOperation, ConcurrentOperation otherOperation) Implementations of this method will determine how to resolve a conflict between 2 commits.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleConcurrentFileWritesConflictResolutionStrategy

public SimpleConcurrentFileWritesConflictResolutionStrategy()

Method Detail

getCandidateInstants

public Stream<HoodieInstant> getCandidateInstants(HoodieTableMetaClient metaClient,
                                                  HoodieInstant currentInstant,
                                                  Option<HoodieInstant> lastSuccessfulInstant)

Description copied from interface: ConflictResolutionStrategy

Stream of instants to check conflicts against.

Specified by:

getCandidateInstants in interface ConflictResolutionStrategy

Returns:

hasConflict

public boolean hasConflict(ConcurrentOperation thisOperation,
                           ConcurrentOperation otherOperation)

Description copied from interface: ConflictResolutionStrategy

Implementations of this method will determine whether a conflict exists between 2 commits.

Specified by:

hasConflict in interface ConflictResolutionStrategy

Returns:

resolveConflict

public Option<HoodieCommitMetadata> resolveConflict(HoodieTable table,
                                                    ConcurrentOperation thisOperation,
                                                    ConcurrentOperation otherOperation)

Description copied from interface: ConflictResolutionStrategy

Implementations of this method will determine how to resolve a conflict between 2 commits.

Specified by:

resolveConflict in interface ConflictResolutionStrategy

Returns:

isPreCommitRequired

public boolean isPreCommitRequired()

Description copied from interface: ConflictResolutionStrategy

Write clients uses their preCommit API to run conflict resolution. This method determines whether to execute preCommit for table services like clustering.

Specified by:

isPreCommitRequired in interface ConflictResolutionStrategy

Returns:

boolean