org.objectweb.cjdbc.controller.virtualdatabase.protocol
Class DistributedRequest

java.lang.Object
  org.objectweb.cjdbc.controller.virtualdatabase.protocol.DistributedRequest

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

CacheInvalidate, ExecReadRequest, ExecReadStoredProcedure, ExecWriteRequest, ExecWriteRequestWithKeys, ExecWriteStoredProcedure, NotifyCompletion, UnlogCommit, UnlogRequest, UnlogRollback

public abstract class DistributedRequest

extends java.lang.Object

implements java.io.Serializable

DistributedRequest is an abstract class that defines the interface for distributed execution of a request (horizontal scalability).

Version:

1.0

Author:

Emmanuel Cecchet

See Also:

Serialized Form

Field Summary

protected AbstractRequest

request

Constructor Summary

DistributedRequest(AbstractRequest request)
Builds a new DistributedRequest object.

Method Summary

abstract java.lang.Object	executeScheduledRequest(DistributedRequestManager drm) Code to be executed by the distributed request manager receiving the request.
AbstractRequest	getRequest() Returns the request value.
abstract void	scheduleRequest(DistributedRequestManager drm) Schedule the request.

Methods inherited from class java.lang.Object

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

Field Detail

request

protected AbstractRequest request

Constructor Detail

DistributedRequest

public DistributedRequest(AbstractRequest request)

Builds a new DistributedRequest object.

Parameters:

request - request to execute

Method Detail

getRequest

public final AbstractRequest getRequest()

Returns the request value.

Returns:

Returns the request.

scheduleRequest

public abstract void scheduleRequest(DistributedRequestManager drm)
                              throws java.sql.SQLException

Schedule the request. This method blocks until the request is scheduled.

Parameters:

drm - a distributed request manager

Throws:

java.sql.SQLException - if an error occurs.

executeScheduledRequest

public abstract java.lang.Object executeScheduledRequest(DistributedRequestManager drm)
                                                  throws java.sql.SQLException

Code to be executed by the distributed request manager receiving the request.

Parameters:

drm - a distributed request manager

Returns:

an Object to be sent back to the caller

Throws:

java.sql.SQLException - if an error occurs.