Package org.apache.wayang.flink.execution

Class FlinkContextReference

java.lang.Object

org.apache.wayang.core.util.AbstractReferenceCountable

org.apache.wayang.core.platform.ExecutionResourceTemplate

org.apache.wayang.flink.execution.FlinkContextReference

All Implemented Interfaces:

ExecutionResource, ReferenceCountable

public class FlinkContextReference
extends ExecutionResourceTemplate

Wraps and manages a Flink ExecutionEnvironment to avoid steady re-creation.

Constructor Summary

Constructors

Constructor	Description
FlinkContextReference(CrossPlatformExecutor crossPlatformExecutor, org.apache.flink.api.java.ExecutionEnvironment flinkEnviroment, int parallelism)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
protected void	doDispose()	Performs the actual disposing work of this instance.
org.apache.flink.api.java.ExecutionEnvironment	get()	Provides the ExecutionEnvironment.
boolean	isDisposed()	Optional operation. Tell whether this instance has been disposed.

Methods inherited from class org.apache.wayang.core.platform.ExecutionResourceTemplate

dispose, disposeUnreferenced

Methods inherited from class org.apache.wayang.core.util.AbstractReferenceCountable

disposeIfUnreferenced, getNumReferences, noteDiscardedReference, noteObtainedReference

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wayang.core.util.ReferenceCountable

disposeIfUnreferenced, getNumReferences, noteDiscardedReference, noteObtainedReference

Constructor Details

FlinkContextReference

public FlinkContextReference(CrossPlatformExecutor crossPlatformExecutor,
 org.apache.flink.api.java.ExecutionEnvironment flinkEnviroment,
 int parallelism)

Creates a new instance.

Parameters:

flinkEnviroment - the ExecutionEnvironment to be wrapped

Method Details

get

public org.apache.flink.api.java.ExecutionEnvironment get()

Provides the ExecutionEnvironment. This instance must not be disposed, yet.

Returns:

the wrapped ExecutionEnvironment

doDispose

protected void doDispose()
                  throws Throwable

Description copied from class: ExecutionResourceTemplate

Performs the actual disposing work of this instance.

Specified by:

doDispose in class ExecutionResourceTemplate

Throws:

Throwable - in case anything goes wrong

isDisposed

public boolean isDisposed()

Description copied from interface: ReferenceCountable

Optional operation. Tell whether this instance has been disposed.

Specified by:

isDisposed in interface ReferenceCountable

Overrides:

isDisposed in class AbstractReferenceCountable

Returns:

whether this instance has been disposed