/**
* Copyright 2007-2010 非也
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation。
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses. *
*/
package org.fireflow.pvm.kernel.impl;
import java.util.List;
import org.fireflow.client.WorkflowSession;
import org.fireflow.client.impl.WorkflowSessionLocalImpl;
import org.fireflow.engine.context.RuntimeContext;
import org.fireflow.pvm.kernel.ArcInstance;
import org.fireflow.pvm.kernel.BookMark;
import org.fireflow.pvm.kernel.ExecutionEntrance;
import org.fireflow.pvm.kernel.KernelException;
import org.fireflow.pvm.kernel.KernelManager;
import org.fireflow.pvm.kernel.NodeInstance;
import org.fireflow.pvm.kernel.PObject;
import org.fireflow.pvm.kernel.PObjectKey;
import org.fireflow.pvm.kernel.Token;
import org.fireflow.pvm.kernel.TokenState;
import org.fireflow.pvm.pdllogic.BusinessStatus;
import org.fireflow.pvm.pdllogic.ContinueDirection;
import org.fireflow.pvm.pdllogic.ExecuteResult;
import org.fireflow.pvm.pdllogic.WorkflowBehavior;
/**
* @author 非也
* @version 2.0
*/
public class ArcInstanceImpl extends AbstractPObject implements
ArcInstance {
protected NodeInstance fromNodeInstance = null;
protected NodeInstance toNodeInstance = null;
public ArcInstanceImpl(PObjectKey key){
super(key);
}
/*
* (non-Javadoc)
*
* @see org.fireflow.pvm.kernel.ArcInstance#getFrom()
*/
// @Override
public NodeInstance getFrom() {
return fromNodeInstance;
}
public void setFrom(NodeInstance from) {
this.fromNodeInstance = from;
}
/*
* (non-Javadoc)
*
* @see org.fireflow.pvm.kernel.ArcInstance#getTo()
*/
// @Override
public NodeInstance getTo() {
return toNodeInstance;
}
public void setTo(NodeInstance to) {
this.toNodeInstance = to;
}
public boolean isCancellable(){
return false;
}
public boolean isAcceptCompensation(Token token,String compensationCode){
return false;
}
public boolean isCompensable(){
return false;
}
/*
* (non-Javadoc)
*
* @seeorg.fireflow.pvm.kernel.ProcessObject#takeToken(org.fireflow.engine.
* WorkflowSession, org.fireflow.pvm.kernel.Token)
*/
@Override
public void takeToken(WorkflowSession session, Token token, Token sourceToken) {
if (!token.getState().equals(TokenState.INITIALIZED)) {
throw new KernelException(this,
"Illegal token state ,the TokenState.INITIALIZED is expected,but it is "
+ token.getState().name());
}
RuntimeContext ctx = ((WorkflowSessionLocalImpl) session)
.getRuntimeContext();
KernelManager kernelManager = ctx
.getDefaultEngineModule(KernelManager.class);
WorkflowBehavior behavior = this.getWorkflowBehavior();
token.setState(TokenState.RUNNING);
kernelManager.saveOrUpdateToken(token);
behavior.onTokenStateChanged(session, token, this.getWorkflowElement());
// ArcInstance上的behavior一般功能是计算token.alive的值和token.value的值。
ExecuteResult result = behavior.execute(session, token, this
.getWorkflowElement());
BusinessStatus status = result.getStatus();
if (status.equals(BusinessStatus.COMPLETED)) {
BookMark bookMark = new BookMark();
bookMark.setToken(token);
bookMark.setExecutionEntrance(ExecutionEntrance.FORWARD_TOKEN);
kernelManager.addBookMark(bookMark);
}
else if (status.equals(BusinessStatus.RUNNING)){
//调试状态
return;
}
else {
// 不支持其他类型的Status
throw new KernelException(this,
"Not supported workflow behavior status for arc instance ,the WorkflowBehaviorStatus.COMPLETED is expected ,but the status is "
+ status.name());
}
}
/*
* (non-Javadoc)
*
* @see
* org.fireflow.pvm.kernel.ProcessObject#forwardToken(org.fireflow.engine
* .WorkflowSession, org.fireflow.pvm.kernel.Token)
*/
@Override
public void forwardToken(WorkflowSession session, Token token, Token sourceToken) {
this.complete(session, token);
}
public void complete(WorkflowSession session, Token token) {
RuntimeContext runtimeContext = ((WorkflowSessionLocalImpl) session)
.getRuntimeContext();
KernelManager kernelManager = runtimeContext
.getDefaultEngineModule(KernelManager.class);
ContinueDirection continueDirection = behavior.continueOn(session,
token, this.getWorkflowElement());
// 执行后继结点
if (continueDirection.getDirection() == ContinueDirection.CLOSE_ME) {
List<PObjectKey> keys = continueDirection
.getNextProcessObjectKeys();
if (keys != null && keys.size() > 0) {
// 启动新的节点
for (PObjectKey key : keys) {
Token newToken = new TokenImpl(token);
newToken.setElementId(key.getWorkflowElementId());
BookMark bookMark = new BookMark();
bookMark.setToken(newToken);
bookMark.setExecutionEntrance(ExecutionEntrance.TAKE_TOKEN);
kernelManager.addBookMark(bookMark);
}
}
} else {
throw new KernelException(this,
"Unsupported ContinueDirection type for this element, whose id is ["
+ this.getKey().toString() + "]");
}
token.setState(TokenState.COMPLETED);
kernelManager.saveOrUpdateToken(token);
WorkflowBehavior behavior = this.getWorkflowBehavior();
behavior.onTokenStateChanged(session, token, this.getWorkflowElement());
}
/*
* (non-Javadoc)
* （2012-02-03，该动作容易和handleTermination混淆，意义也不是特别大，暂且注销）
* @see
* org.fireflow.pvm.kernel.ProcessObject#handleCancellation(org.fireflow
* .engine.WorkflowSession, org.fireflow.pvm.kernel.Token)
*/
/*
public void handleCancellation(WorkflowSession session, Token existToken, Token sourceToken) {
// TODO Auto-generated method stub
}*/
/*
* (non-Javadoc)
*
* @see
* org.fireflow.pvm.kernel.ProcessObject#handleCompensation(org.fireflow
* .engine.WorkflowSession, org.fireflow.pvm.kernel.Token, java.lang.String)
*/
public void handleCompensation(WorkflowSession session, Token existToken,
Token sourceToken, String compensationCode) {
// TODO Auto-generated method stub
}
/*
* (non-Javadoc)
*
* @see
* org.fireflow.pvm.kernel.ProcessObject#handleFault(org.fireflow.engine
* .WorkflowSession, org.fireflow.pvm.kernel.Token, java.lang.String)
*/
@Override
public void handleFault(WorkflowSession session, Token existToken,
Token sourceToken, String faultCode) {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see org.fireflow.pvm.kernel.PObject#handleTermination(org.fireflow.engine.WorkflowSession, org.fireflow.pvm.kernel.Token, org.fireflow.pvm.kernel.Token)
*/
@Override
public void handleTermination(WorkflowSession session, Token thisToken,
Token sourceToken) {
RuntimeContext ctx = ((WorkflowSessionLocalImpl) session)
.getRuntimeContext();
KernelManager kernelManager = ctx.getDefaultEngineModule(KernelManager.class);
thisToken.setState(TokenState.ABORTED);
kernelManager.saveOrUpdateToken(thisToken);
WorkflowBehavior behavior = this.getWorkflowBehavior();
behavior.onTokenStateChanged(session, thisToken, this.getWorkflowElement());
//触发父节点的forword
Token parentToken = kernelManager.getParentToken(thisToken);
PObject parent = null;
if (parentToken != null) {
parent = kernelManager.getProcessObject(parentToken);
}
BookMark bookMark = new BookMark();
bookMark.setToken(parentToken);
bookMark.setExecutionEntrance(ExecutionEntrance.FORWARD_TOKEN);
kernelManager.addBookMark(bookMark);
}
}