/*
* Copyright 2010-2011 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.starflow.wf.engine;
import java.util.concurrent.atomic.AtomicBoolean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.starflow.wf.core.util.ApplicationContextHolder;
/**
*
* @author libinsong1204@gmail.com
* @version 1.0
*/
public class ProcessEngineBuilder {
private AtomicBoolean initialized = new AtomicBoolean(false);
private ApplicationContext applicationContext;
private ProcessEngine processEngine;
private Configuration configuration;
public ProcessEngineBuilder() {
this("applicationContext.xml", Configuration.getInstance());
}
public ProcessEngineBuilder(Configuration configuration) {
this("applicationContext.xml", configuration);
}
public ProcessEngineBuilder(String springConfigFile, Configuration configuration) {
this(new ClassPathXmlApplicationContext(springConfigFile), configuration);
}
public ProcessEngineBuilder(ApplicationContext applicationContext) {
this(applicationContext, Configuration.getInstance());
}
public ProcessEngineBuilder(ApplicationContext applicationContext, Configuration configuration) {
this.applicationContext = applicationContext;
ApplicationContextHolder.setAppContext(this.applicationContext);
this.configuration = configuration;
}
public ProcessEngine buildProcessEngine() {
checkInitialized();
return this.processEngine;
}
private void checkInitialized() {
if (processEngine == null && initialized.compareAndSet(false, true)) {
processEngine = new ProcessEngine(this.applicationContext, this.configuration);
}
}
}