org.eclipse.persistence.sessions.coordination.Command Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.sessions.coordination;
import org.eclipse.persistence.internal.sessions.AbstractSession;
/**
*
* Purpose: Provide an extendable framework class for a Command object
* that can be remotely executed.
*
* Description: Is the root command class from which all other remotely
* executable commands must extend. A Command is invoked by calling
* propagateCommand() on a local CommandManager, and is executed on each remote
* service by each remote CommandManager invoking processCommand() on its local
*
* @see CommandManager
* @see CommandProcessor
* @author Steven Vo
* @since OracleAS TopLink 10g (9.0.4)
*/
public abstract class Command implements java.io.Serializable {
/** The unique calling card of the service that initiated the command */
ServiceId serviceId;
/**
* INTERNAL:
* If the CommandProcessor is a EclipseLink session then this method will
* get executed.
*
* @param session The session that can be used to execute the command on.
*/
public abstract void executeWithSession(AbstractSession session);
/**
* PUBLIC:
* Return the service identifier of the service where the command originated
*
* @return The unique identifier of the sending RCM service
*/
public ServiceId getServiceId() {
return serviceId;
}
/**
* ADVANCED:
* Set the service identifier of the service where the command originated
*
* @param newServiceId The unique identifier of the sending RCM service
*/
public void setServiceId(ServiceId newServiceId) {
serviceId = newServiceId;
}
/**
* INTERNAL:
* Determine whether this command is public or internal to EclipseLink.
* User commands must return false.
*/
public boolean isInternalCommand() {
return false;
}
}