[英]How to add prefix in thread names generated through ExecutorService
我有 jdk 1.7 的 java 代码,如下所示,它正在执行并行线程基础实现
ExecutorService executorService = Executors.newFixedThreadPool(currentRecordSize); executorService.execute((Runnable) someobject);
在日志中,我得到了线程名称,例如
pool-2-thread-1 pool-2-thread-2 pool-1-thread-1 pool-1-thread-2
我想用一些字符串作为后缀
您可以使用自定义线程工厂,例如在 Ehcache 中有一个以这种方式实现的:
public class NamedThreadFactory implements ThreadFactory {
private static AtomicInteger threadNumber = new AtomicInteger(1);
private final String namePrefix;
/**
* Constructor accepting the prefix of the threads that will be created by this {@link ThreadFactory}
*
* @param namePrefix
* Prefix for names of threads
*/
public NamedThreadFactory(String namePrefix) {
this.namePrefix = namePrefix;
}
/**
* Returns a new thread using a name as specified by this factory {@inheritDoc}
*/
public Thread newThread(Runnable runnable) {
return new Thread(runnable, namePrefix + " thread-" + threadNumber.getAndIncrement());
}
}
然后你可以这样创建你的执行者:
ExecutorService executor = Executors.newFixedThreadPool(currentRecordSize, new NamedThreadFactory("Your prefix here"));
我的代码带有@Guillaume 逻辑。 我唯一在想的是 AtomicInteger 字段应该是类级别而不是静态的,因为在每个循环之后都按照我的逻辑创建了新池
public void run() {
log.info(name + " Started");
ExecutorService executorService = null;
while (true) {
try {
List<HashMap<String, String>> rows = QueryFromDB;
int currentRecordSize = rows.size();
if (currentRecordSize > 0) {
NamedThreadFactory threadFactory = new NamedThreadFactory(name);
log.info(" *** " + name + " Initializing Executor . Received " + rows.size() + " txns.");
if (currentRecordSize < threadPoolSize) {
//executorService = Executors.newFixedThreadPool(currentRecordSize);
executorService = Executors.newFixedThreadPool(currentRecordSize, threadFactory);
} else {
//executorService = Executors.newFixedThreadPool(threadPoolSize);
executorService = Executors.newFixedThreadPool(threadPoolSize, threadFactory);
}
for (HashMap<String, String> row : rows) {
MyClass obj = fromsomeclassmethod;
if (obj instanceof Runnable) {
executorService.execute((Runnable) obj);
} else {
obj.SomeMethod(..);
}
Thread.sleep(ThreadExecutorSleep);//some minor sleep like 10 miliseconds
}
if (!(executorService.isShutdown())) {
executorService.shutdown();
executorService.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
}
}
Thread.sleep(ADMSProcessor.fetchQueInterval);//1 second sleep
} catch (Exception ex) {
log.fatal("Exception in " + name + " Thread :" + ex);
}
}
}
public class NamedThreadFactory implements ThreadFactory {
//private static AtomicInteger threadNumber = new AtomicInteger(1);
private AtomicInteger threadNumber = new AtomicInteger(1);
private final String namePrefix;
/**
* Constructor accepting the prefix of the threads that will be created by this {@link ThreadFactory}
*
* @param namePrefix
* Prefix for names of threads
*/
public NamedThreadFactory(String namePrefix) {
this.namePrefix = namePrefix;
}
/**
* Returns a new thread using a name as specified by this factory {@inheritDoc}
*/
public Thread newThread(Runnable runnable) {
return new Thread(runnable, namePrefix + " thread-" + threadNumber.getAndIncrement());
}
}
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