AOPのSyncInterceptor

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１．Count.java

package examples.di;

public interface Count {
public void add();
public int get();
}

2.CountImpl.java

package examples.di.impl;

import examples.di.Count;

public class CountImpl implements Count {
private int _count = 0;

public void add() {
int a = _count;

        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        _count = a + 1;
        System.out.println(a);
    }

    public int get() {
        return _count;
    }
}

3.AopSyncClient.java

package examples.di.main;

import org.seasar.framework.container.S2Container;
import org.seasar.framework.container.factory.S2ContainerFactory;

import examples.di.Count;

public class AopSyncClient {
private String PATH = "Count.dicon";
private Count _count = null;

    public void init() {
        S2Container container = S2ContainerFactory.create(PATH);
        _count = (Count) container.getComponent(Count.class);
    }

public void start() {
System.out.println("count: " + _count.get());

        Runnable r = new Runnable() {
            public void run() {
                _count.add();
            }
        };
        Thread[] thres = new Thread[5];
        for (int i=0; i<5; i++) {
            thres[i] = new Thread(r);
            thres[i].start();
        }
        for (int i=0; i<5; i++) {
            try {
                thres[i].join();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

System.out.println("count: " + _count.get());
}

    public static void main(String[] args) {
        AopSyncClient asc = new AopSyncClient();
        asc.init();
        asc.start();
    }
}

4.Count.dicon

<?xml version="1.0" encoding="Shift_JIS"?>
<!DOCTYPE components PUBLIC "-//SEASAR//DTD S2Container//EN"
"http://www.seasar.org/dtd/components.dtd">
<components>
    <component class="examples.di.impl.CountImpl">
        <aspect>
            <component class="org.seasar.framework.aop.interceptors.SyncInterceptor"/>
        </aspect>
    </component>
</components>

如果不加<aspect>则每次运行thres[i] = new Thread(r);的时候都会生成一个新的实例