15、Jini服务管理与安全机制解析

Jini服务管理与安全机制解析

1. Jini服务管理实现

1.1 SnapshotThread类

ServiceImpl 的 updatePerformed 方法可以被重写以执行特定于服务的处理，例如确定应捕获哪些信息以及捕获的频率。以下是 SnapshotThread 类的代码：

// ServiceImpl called by PersistentStore
public void updatePerformed(int updateCount) {
    snapshotter.takeSnapshot();
}

/**
 * Thread that performs the actual snapshots, done in a separate 
thread 
 * so it will not hang up in progress remote calls 
 */
private class SnapshotThread extends Thread {
    /** Create a daemon thread */
    private SnapshotThread() {
        super("snapshot thread");
        setDaemon(true);
    }

    /** Signal this thread that it should take a snapshot */
    private synchronized void takeSnap