tech.ydb.topic.read.impl

Class AsyncReaderImpl

java.lang.Object

tech.ydb.topic.impl.GrpcStreamRetrier

tech.ydb.topic.read.impl.ReaderImpl

tech.ydb.topic.read.impl.AsyncReaderImpl

All Implemented Interfaces:

AsyncReader

public class AsyncReaderImpl
extends ReaderImpl
implements AsyncReader

Author:

Nikolay Perfilov

Nested Class Summary

Nested classes/interfaces inherited from class tech.ydb.topic.read.impl.ReaderImpl

ReaderImpl.ReadSessionImpl

Field Summary

Fields inherited from class tech.ydb.topic.impl.GrpcStreamRetrier

id, isReconnecting, isStopped, reconnectCounter

Constructor Summary

Constructors

Constructor and Description
AsyncReaderImpl(TopicRpc topicRpc, ReaderSettings settings, ReadEventHandlersSettings handlersSettings)

Method Summary

Modifier and Type	Method and Description
protected void	handleClosePartitionSession(PartitionSession partitionSession)
protected void	handleCommitResponse(long committedOffset, PartitionSession partitionSession)
protected CompletableFuture<Void>	handleDataReceivedEvent(DataReceivedEvent event)
protected CompletableFuture<Void>	handleReaderClosed()
protected void	handleStartPartitionSessionRequest(tech.ydb.proto.topic.YdbTopic.StreamReadMessage.StartPartitionSessionRequest request, PartitionSession partitionSession, Consumer<StartPartitionSessionSettings> confirmCallback)
protected void	handleStopPartitionSession(tech.ydb.proto.topic.YdbTopic.StreamReadMessage.StopPartitionSessionRequest request, PartitionSession partitionSession, Runnable confirmCallback)
CompletableFuture<Void>	init() Initialize reading in the background.
protected void	onShutdown(String reason)
CompletableFuture<Void>	shutdown() Stops internal threads and makes cleanup in background.
CompletableFuture<Status>	updateOffsetsInTransaction(YdbTransaction transaction, Map<String,List<PartitionOffsets>> offsets, UpdateOffsetsInTransactionSettings settings) Add offsets to transaction.

Methods inherited from class tech.ydb.topic.read.impl.ReaderImpl

getLogger, getStreamName, initImpl, onStreamReconnect, sendUpdateOffsetsInTransaction

Methods inherited from class tech.ydb.topic.impl.GrpcStreamRetrier

generateRandomId, onSessionClosed, shutdownImpl, shutdownImpl

Methods inherited from class java.lang.Object

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

Methods inherited from interface tech.ydb.topic.read.AsyncReader

updateOffsetsInTransaction

Constructor Detail

AsyncReaderImpl

public AsyncReaderImpl(TopicRpc topicRpc,
                       ReaderSettings settings,
                       ReadEventHandlersSettings handlersSettings)

Method Detail

init

public CompletableFuture<Void> init()

Description copied from interface: AsyncReader

Initialize reading in the background. Non-blocking

Specified by:

init in interface AsyncReader

updateOffsetsInTransaction

public CompletableFuture<Status> updateOffsetsInTransaction(YdbTransaction transaction,
                                                            Map<String,List<PartitionOffsets>> offsets,
                                                            UpdateOffsetsInTransactionSettings settings)

Description copied from interface: AsyncReader

Add offsets to transaction. Offsets could be from several topics. These offsets are "committed" only after said transaction is successfully committed. It is a separate request sent outside the reading stream.

Specified by:

updateOffsetsInTransaction in interface AsyncReader

Parameters:

transaction - a YdbTransaction that offsets should be added to. Transaction has to be active.

offsets - Offsets that should be added to transaction. Map key: topic Path Map value: List of Partition ranges for every partition in this topic to add

settings - Operation settings.

Returns:

CompletableFuture to operation status

handleDataReceivedEvent

protected CompletableFuture<Void> handleDataReceivedEvent(DataReceivedEvent event)

Specified by:

handleDataReceivedEvent in class ReaderImpl

handleCommitResponse

protected void handleCommitResponse(long committedOffset,
                                    PartitionSession partitionSession)

Specified by:

handleCommitResponse in class ReaderImpl

handleStartPartitionSessionRequest

protected void handleStartPartitionSessionRequest(tech.ydb.proto.topic.YdbTopic.StreamReadMessage.StartPartitionSessionRequest request,
                                                  PartitionSession partitionSession,
                                                  Consumer<StartPartitionSessionSettings> confirmCallback)

Specified by:

handleStartPartitionSessionRequest in class ReaderImpl

handleStopPartitionSession

protected void handleStopPartitionSession(tech.ydb.proto.topic.YdbTopic.StreamReadMessage.StopPartitionSessionRequest request,
                                          PartitionSession partitionSession,
                                          Runnable confirmCallback)

Specified by:

handleStopPartitionSession in class ReaderImpl

handleClosePartitionSession

protected void handleClosePartitionSession(PartitionSession partitionSession)

Specified by:

handleClosePartitionSession in class ReaderImpl

handleReaderClosed

protected CompletableFuture<Void> handleReaderClosed()

onShutdown

protected void onShutdown(String reason)

Overrides:

onShutdown in class ReaderImpl

shutdown

public CompletableFuture<Void> shutdown()

Description copied from interface: AsyncReader

Stops internal threads and makes cleanup in background. Non-blocking

Specified by:

shutdown in interface AsyncReader