Package com.oracle.coherence.concurrent.executor.tasks

Class ValueTask<T>

java.lang.Object

com.oracle.coherence.concurrent.executor.tasks.ValueTask<T>

Type Parameters:

T - the type of result produced by the Task

All Implemented Interfaces:

Task<T>, ExternalizableLite, PortableObject, Serializable

public class ValueTask<T>
extends Object
implements Task<T>, PortableObject

A Task that provides a constant value as a result.

Since:

21.12

Author:

bo

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.oracle.coherence.concurrent.executor.Task

Task.Collectable<T,R>, Task.Collector<T,A,R>, Task.Completable<T,R>, Task.CompletionRunnable<T>, Task.Context<T>, Task.Coordinator<T>, Task.Option, Task.Orchestration<T>, Task.Properties, Task.SubscribedOrchestration<T>, Task.Subscriber<T>, Task.Subscription<T>, Task.Yield

Field Summary

Fields

Modifier and Type	Field	Description
protected long	m_cInitialDelay	The initial delay before returning the result.
protected T	m_value	The value for the Task.

Constructor Summary

Constructors

Constructor	Description
ValueTask()	Constructs a ValueTask (required for serialization).
ValueTask(T value)	Constructs a ValueTask.
ValueTask(T value, long cInitialDelay)	Constructs a ValueTask that returns its value after the given delay.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
T	execute(Task.Context<T> context)	Executes the Task.
int	hashCode()
void	readExternal(PofReader in)	Restore the contents of a user type instance by reading its state using the specified PofReader object.
void	readExternal(DataInput in)	Restore the contents of this object by loading the object's state from the passed DataInput object.
String	toString()
void	writeExternal(PofWriter out)	Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
void	writeExternal(DataOutput out)	Save the contents of this object by storing the object's state into the passed DataOutput object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

m_value

protected T m_value

The value for the Task.

m_cInitialDelay

protected long m_cInitialDelay

The initial delay before returning the result.

Constructor Detail

ValueTask

public ValueTask()

Constructs a ValueTask (required for serialization).

ValueTask

public ValueTask(T value)

Constructs a ValueTask.

Parameters:

value - the value to return

ValueTask

public ValueTask(T value,
                 long cInitialDelay)

Constructs a ValueTask that returns its value after the given delay.

Parameters:

value - the value to return

cInitialDelay - the delay, in millis, the task should wait before returning the value

Method Detail

execute

public T execute(Task.Context<T> context)
          throws Exception

Description copied from interface: Task

Executes the Task.

Specified by:

execute in interface Task<T>

Parameters:

context - the Task.Context

Returns:

the result of executing the Task

Throws:

Task.Yield - which indicates the Task execution should yield execution until some later point in time

Exception

readExternal

public void readExternal(DataInput in)
                  throws IOException

Description copied from interface: ExternalizableLite

Restore the contents of this object by loading the object's state from the passed DataInput object.

Specified by:

readExternal in interface ExternalizableLite

Parameters:

in - the DataInput stream to read data from in order to restore the state of this object

Throws:

IOException - if an I/O exception occurs

NotActiveException - if the object is not in its initial state, and therefore cannot be deserialized into

writeExternal

public void writeExternal(DataOutput out)
                   throws IOException

Description copied from interface: ExternalizableLite

Save the contents of this object by storing the object's state into the passed DataOutput object.

Specified by:

writeExternal in interface ExternalizableLite

Parameters:

out - the DataOutput stream to write the state of this object to

Throws:

IOException - if an I/O exception occurs

readExternal

public void readExternal(PofReader in)
                  throws IOException

Description copied from interface: PortableObject

Restore the contents of a user type instance by reading its state using the specified PofReader object.

Specified by:

readExternal in interface PortableObject

Parameters:

in - the PofReader from which to read the object's state

Throws:

IOException - if an I/O error occurs

writeExternal

public void writeExternal(PofWriter out)
                   throws IOException

Description copied from interface: PortableObject

Save the contents of a POF user type instance by writing its state using the specified PofWriter object.

Specified by:

writeExternal in interface PortableObject

Parameters:

out - the PofWriter to which to write the object's state

Throws:

IOException - if an I/O error occurs

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object