org.apache.flink.cdc.runtime.operators.schema.coordinator

Class SchemaRegistry

java.lang.Object

org.apache.flink.cdc.runtime.operators.schema.coordinator.SchemaRegistry

All Implemented Interfaces:

AutoCloseable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.runtime.operators.coordination.CoordinationRequestHandler, org.apache.flink.runtime.operators.coordination.OperatorCoordinator

public class SchemaRegistry
extends Object
implements org.apache.flink.runtime.operators.coordination.OperatorCoordinator, org.apache.flink.runtime.operators.coordination.CoordinationRequestHandler

The implementation of the OperatorCoordinator for the SchemaOperator.

The SchemaRegister provides an event loop style thread model to interact with the Flink runtime. The coordinator ensures that all the state manipulations are made by its event loop thread.

This SchemaRegister is responsible for:

• Apply schema changes when receiving the SchemaChangeRequest from SchemaOperator
• Notify SchemaOperator to continue to push data for the table after receiving FlushSuccessEvent from its registered sink writer

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

org.apache.flink.runtime.operators.coordination.OperatorCoordinator.Context, org.apache.flink.runtime.operators.coordination.OperatorCoordinator.Provider, org.apache.flink.runtime.operators.coordination.OperatorCoordinator.SubtaskGateway

Field Summary

Fields inherited from interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

NO_CHECKPOINT

Constructor Summary

Constructors

Constructor and Description
SchemaRegistry(String operatorName, org.apache.flink.runtime.operators.coordination.OperatorCoordinator.Context context, org.apache.flink.cdc.common.sink.MetadataApplier metadataApplier, List<org.apache.flink.api.java.tuple.Tuple2<org.apache.flink.cdc.common.schema.Selectors,org.apache.flink.cdc.common.event.TableId>> routes)

Method Summary

Modifier and Type	Method and Description
void	checkpointCoordinator(long checkpointId, CompletableFuture<byte[]> resultFuture)
void	close()
void	executionAttemptFailed(int subtask, int attemptNumber, Throwable throwable)
void	executionAttemptReady(int subtask, int attemptNumber, org.apache.flink.runtime.operators.coordination.OperatorCoordinator.SubtaskGateway subtaskGateway)
CompletableFuture<org.apache.flink.runtime.operators.coordination.CoordinationResponse>	handleCoordinationRequest(org.apache.flink.runtime.operators.coordination.CoordinationRequest request)
void	handleEventFromOperator(int subtask, int attemptNumber, org.apache.flink.runtime.operators.coordination.OperatorEvent event)
void	notifyCheckpointComplete(long checkpointId)
void	resetToCheckpoint(long checkpointId, byte[] checkpointData)
void	start()
void	subtaskReset(int subtask, long checkpointId)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

notifyCheckpointAborted

Constructor Detail

SchemaRegistry

public SchemaRegistry(String operatorName,
                      org.apache.flink.runtime.operators.coordination.OperatorCoordinator.Context context,
                      org.apache.flink.cdc.common.sink.MetadataApplier metadataApplier,
                      List<org.apache.flink.api.java.tuple.Tuple2<org.apache.flink.cdc.common.schema.Selectors,org.apache.flink.cdc.common.event.TableId>> routes)

Method Detail

start

public void start()
           throws Exception

Specified by:

start in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Specified by:

close in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

Throws:

Exception

handleEventFromOperator

public void handleEventFromOperator(int subtask,
                                    int attemptNumber,
                                    org.apache.flink.runtime.operators.coordination.OperatorEvent event)
                             throws Exception

Specified by:

handleEventFromOperator in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

Throws:

Exception

checkpointCoordinator

public void checkpointCoordinator(long checkpointId,
                                  CompletableFuture<byte[]> resultFuture)
                           throws Exception

Specified by:

checkpointCoordinator in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

Throws:

Exception

notifyCheckpointComplete

public void notifyCheckpointComplete(long checkpointId)

Specified by:

notifyCheckpointComplete in interface org.apache.flink.api.common.state.CheckpointListener

Specified by:

notifyCheckpointComplete in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

handleCoordinationRequest

public CompletableFuture<org.apache.flink.runtime.operators.coordination.CoordinationResponse> handleCoordinationRequest(org.apache.flink.runtime.operators.coordination.CoordinationRequest request)

Specified by:

handleCoordinationRequest in interface org.apache.flink.runtime.operators.coordination.CoordinationRequestHandler

resetToCheckpoint

public void resetToCheckpoint(long checkpointId,
                              @Nullable
                              byte[] checkpointData)
                       throws Exception

Specified by:

resetToCheckpoint in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

Throws:

Exception

subtaskReset

public void subtaskReset(int subtask,
                         long checkpointId)

Specified by:

subtaskReset in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

executionAttemptFailed

public void executionAttemptFailed(int subtask,
                                   int attemptNumber,
                                   @Nullable
                                   Throwable throwable)

Specified by:

executionAttemptFailed in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator

executionAttemptReady

public void executionAttemptReady(int subtask,
                                  int attemptNumber,
                                  org.apache.flink.runtime.operators.coordination.OperatorCoordinator.SubtaskGateway subtaskGateway)

Specified by:

executionAttemptReady in interface org.apache.flink.runtime.operators.coordination.OperatorCoordinator