Package org.apache.flink.table.gateway.service.operation

Class OperationManager

java.lang.Object

org.apache.flink.table.gateway.service.operation.OperationManager

@Internal
public class OperationManager
extends Object

Manager for the OperationManager.Operation.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	OperationManager.Operation	Operation to manage the execution, results and so on.

Constructor Summary

Constructors

Constructor	Description
OperationManager(ExecutorService service)

Method Summary

Modifier and Type	Method	Description
void	awaitOperationTermination(OperationHandle operationHandle)
void	cancelOperation(OperationHandle operationHandle)	Cancel the execution of the operation.
void	close()	Closes the OperationManager and all operations.
void	closeOperation(OperationHandle operationHandle)	Close the operation and release all resources used by the OperationManager.Operation.
ResultSet	fetchResults(OperationHandle operationHandle, long token, int maxRows)	Get the results of the operation.
ResultSet	fetchResults(OperationHandle operationHandle, FetchOrientation orientation, int maxRows)
OperationManager.Operation	getOperation(OperationHandle operationHandle)
int	getOperationCount()
OperationInfo	getOperationInfo(OperationHandle operationHandle)	Get the OperationInfo of the operation.
ResolvedSchema	getOperationResultSchema(OperationHandle operationHandle)	Get the ResolvedSchema of the operation.
OperationHandle	submitOperation(Callable<ResultSet> executor)	Submit the operation to the OperationManager.
OperationHandle	submitOperation(Function<OperationHandle,ResultFetcher> fetcherSupplier)	Submit the operation to the OperationManager.

Methods inherited from class java.lang.Object

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

Constructor Detail

OperationManager

public OperationManager(ExecutorService service)

Method Detail

submitOperation

public OperationHandle submitOperation(Callable<ResultSet> executor)

Submit the operation to the OperationManager. The OperationManager manages the lifecycle of the OperationManager.Operation, including register resources, fire the execution and so on.

Parameters:

executor - Worker to execute.

Returns:

OperationHandle to fetch the results or check the status.

submitOperation

public OperationHandle submitOperation(Function<OperationHandle,ResultFetcher> fetcherSupplier)

Submit the operation to the OperationManager. The OperationManager manges the lifecycle of the OperationManager.Operation, including register resources, fire the execution and so on.

Parameters:

fetcherSupplier - offer the fetcher to get the results.

Returns:

OperationHandle to fetch the results or check the status.

cancelOperation

public void cancelOperation(OperationHandle operationHandle)

Cancel the execution of the operation.

Parameters:

operationHandle - identifies the OperationManager.Operation.

closeOperation

public void closeOperation(OperationHandle operationHandle)

Close the operation and release all resources used by the OperationManager.Operation.

Parameters:

operationHandle - identifies the OperationManager.Operation.

awaitOperationTermination

public void awaitOperationTermination(OperationHandle operationHandle)
                               throws Exception

Throws:

Exception

getOperationInfo

public OperationInfo getOperationInfo(OperationHandle operationHandle)

Get the OperationInfo of the operation.

Parameters:

operationHandle - identifies the OperationManager.Operation.

getOperationResultSchema

public ResolvedSchema getOperationResultSchema(OperationHandle operationHandle)
                                        throws Exception

Get the ResolvedSchema of the operation.

Parameters:

operationHandle - identifies the OperationManager.Operation.

Throws:

Exception

fetchResults

public ResultSet fetchResults(OperationHandle operationHandle,
                              long token,
                              int maxRows)

Get the results of the operation.

Parameters:

operationHandle - identifies the OperationManager.Operation.

token - identifies which batch of data to fetch.

maxRows - the maximum number of rows to fetch.

Returns:

ResultSet contains the results.

fetchResults

public ResultSet fetchResults(OperationHandle operationHandle,
                              FetchOrientation orientation,
                              int maxRows)

close

public void close()

Closes the OperationManager and all operations.

getOperationCount

@VisibleForTesting
public int getOperationCount()

getOperation

@VisibleForTesting
public OperationManager.Operation getOperation(OperationHandle operationHandle)