[英]Synchronization of Threads in Java
You have a storage object O. 您有一个存储对象O。
Assume you have n reader methods and one writer method in a thread. 假设您在一个线程中有n个读者方法和一个作家方法。 If the writer method is called by a thread, none of the reader methods should be able to access O, but if a reader method accesses O, any other reader may access O but not the writer.
如果通过线程调用writer方法,则所有读取器方法都不能访问O,但是如果读取器方法访问O,则任何其他读取器都可以访问O,但不能访问writer。 Can I somehow implement this behaviour using "synchronized" statements in Java?
我可以使用Java中的“同步”语句以某种方式实现此行为吗? If not: How else could I achieve this?
如果没有:我还能如何实现?
Thank you in advance. 先感谢您。
You could use a ReadWriteLock
. 您可以使用
ReadWriteLock
。 You allocate it somewhere where the reader and writer threads can access it. 您将其分配到读取器和写入器线程可以访问它的位置。 Maybe pass it into their constructors.
也许将其传递给他们的构造函数。
ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
Readers would do: 读者会这样做:
Lock lock = readWriteLock.readLock();
lock.lock();
try {
// do read operations here...
} finally {
lock.unlock();
}
Writers would do: 作家会这样做:
Lock lock = readWriteLock.writeLock();
lock.lock();
try {
// do write operations here...
} finally {
lock.unlock();
}
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