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JdonFramework is a java framework that you can use to build your Domain Driven Design + CQRS + EventSource applications with asynchronous concurrency and higher throughput.
/*
* Copyright 2003-2006 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.jdon.container.visitor.data;
import java.io.Serializable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* this class inlude those datas that read from the web container or others.
* these datas is stateful, and it's scope is one instance per client.
* usually they are saved in httpSession of the web container.
*
* but these datas are different from the components that saved in httpsession.
* it is like the stateful components. it include state data.
*
* the way of visiting the SessionContext that saved in httpSession
*
* targetMetaRequest.setVisitableName(ComponentKeys.SESSIONCONTEXT_FACTORY);
* SessionContext sessionContext = (SessionContext)cm.visit(targetMetaRequest);
*
* @see SessionContextFactoryVisitable#accept create a new SessionContext
* @author banq
*
*/
public class SessionContext implements Serializable{
/**
*
*/
private static final long serialVersionUID = 8469381462547988166L;
public final static String NAME = SessionContext.class.getName();
private final Map arrtibutes;
private final int maxSize;
public SessionContext(int maxSize){
arrtibutes = new ConcurrentHashMap();
this.maxSize = maxSize;
}
public void setArrtibute(String key, Object object){
if (arrtibutes.size() > maxSize){
System.err.print("sessionContext exceed maxSize =" + maxSize);
System.err.print("setup contain.xml sessionContextFactoryVisitable" );
arrtibutes.clear();
}
arrtibutes.put(key, object);
}
public Object getArrtibute(String key){
return arrtibutes.get(key);
}
public void remove(String key){
arrtibutes.remove(key);
}
public void removeAll(){
arrtibutes.clear();
}
}