Created
July 8, 2020 20:33
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| class GuardedObject<T> { | |
| // 受保护的对象 | |
| T obj; | |
| final Lock lock = new ReentrantLock(); | |
| final Condition done = lock.newCondition(); | |
| final int timeout = 1; | |
| T get(Predicate<T> p) { | |
| lock.lock(); | |
| try{ | |
| // MESA管程推荐写法 | |
| while(!p.test(obj)){ | |
| done.await(timeout, TimeUnit.SECONDS); | |
| } | |
| }finally{ | |
| lock.unlock(); | |
| } | |
| return obj; | |
| } | |
| void onChange(T obj){ | |
| lock.lock(); | |
| try{ | |
| this.obj = obj; | |
| done.signalAll(); | |
| }finally{ | |
| lock.unlock(); | |
| } | |
| } | |
| } |
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