如何防止吊索线程池中的线程执行以下语句:serv.getService()。start(tic,info);
如果执行已由一个线程完成多次?
我尝试使用_alreadyExecuted标志,但这似乎无济于事。
日志:/image/x8jZw.png
我的代码如下,
private void sendBlock( service serv, String tic, Resource block,
Update update, Info info, ResourceResolver resolver ) throws
IOException {
private Boolean _alreadyExecuted = Boolean.FALSE;
if( tic != null ) {
String tic = null;
if(!_alreadyExecuted){
getLogger().info("Before startSubmission. Currently _alreadyexecuted is " +_alreadyExecuted);
serv.getService().start( tic, info );
getLogger().info("After startSubmission, _alreadyexecuted is about to change to true. Currently _alreadyexecuted is " +_alreadyExecuted);
_alreadyExecuted = Boolean.TRUE;
getLogger().info("After startSubmission, _alreadyexecuted has been changed to true. Currently _alreadyexecuted is " +_alreadyExecuted);
}
}
}
最佳答案
将字段更改为volatile
:
private volatile Boolean _alreadyExecuted = Boolean.FALSE;
在多线程执行环境中,允许线程缓存字段的值(通常这样做)。关键字
volatile
确保所有线程使用分配给该字段的当前(相同)值。
关于java - 如何停止悬吊线程池中的多个线程执行同一条语句?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45702132/