MemoryMonitor.java 文件源码

public MemoryMonitor() {
    LOG.info("initializing");
    this.springContextId = "Unknown";
    MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
    NotificationEmitter emitter = (NotificationEmitter) mbean;
    emitter.addNotificationListener(new NotificationListener() {
        public void handleNotification(Notification n, Object hb) {
            if (n.getType().equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED)) {
                long maxMemory = tenuredGenPool.getUsage().getMax();
                long usedMemory = tenuredGenPool.getUsage().getUsed();
                for (Listener listener : listeners) {
                    listener.memoryUsageLow(springContextId, usedMemory, maxMemory);
                }
            }
        }
    }, null, null);
}