Module datarush.commons

Package com.pervasive.datarush.cal

Class DistributedCommand<T>

java.lang.Object

com.pervasive.datarush.cal.DistributedCommand<T>

Type Parameters:

T - the result type.

All Implemented Interfaces:

DistributedCallable<T>, Serializable

public abstract class DistributedCommand<T>
extends Object
implements DistributedCallable<T>

Convenient base class for DistributedCallable's that do not support monitoring/partial results.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
DistributedCommand()

Method Summary

Modifier and Type	Method	Description
protected abstract T	execute(DistributedCallableContext ctx)	Subclasses must override to provide an execution implementation
MonitoredCallable<T>	init(DistributedCallableContext ctx)	Implementation of init that returns a callable whose call method invokes execute(DistributedCallableContext).

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.pervasive.datarush.cal.DistributedCallable

merge

Constructor Detail

DistributedCommand

public DistributedCommand()

Method Detail

init

public final MonitoredCallable<T> init(DistributedCallableContext ctx)

Implementation of init that returns a callable whose call method invokes execute(DistributedCallableContext).

Specified by:

init in interface DistributedCallable<T>

Parameters:

ctx - a remote context from which the callable can obtain its distributed identity, etc.

Returns:

the actual callable to invoke.

execute

protected abstract T execute(DistributedCallableContext ctx)
                      throws Exception

Subclasses must override to provide an execution implementation

Parameters:

ctx - the context that was passed to init(DistributedCallableContext).

Returns:

the result

Throws:

Exception - if an exception occurred while processing