final int fixedThreadCount() {
if (isFixedThreadPool()) {
return pool.poolSize();
} else {
return pool.poolSize() + internalThreadCount;
}
}
/**
* For a fixed thread pool the task is queued to a thread waiting on I/O events. For other thread
* pools we simply submit the task to the thread pool.
*/
final void executeOnPooledThread(Runnable task) {
if (isFixedThreadPool()) {
executeOnHandlerTask(task);
} else {
pool.executor().execute(bindToGroup(task));
}
}
AsynchronousChannelGroupImpl(AsynchronousChannelProvider provider, ThreadPool pool) {
super(provider);
this.pool = pool;
if (pool.isFixedThreadPool()) {
taskQueue = new ConcurrentLinkedQueue<Runnable>();
} else {
taskQueue = null; // not used
}
// use default thread factory as thread should not be visible to
// application (it doesn't execute completion handlers).
this.timeoutExecutor =
(ScheduledThreadPoolExecutor)
Executors.newScheduledThreadPool(1, ThreadPool.defaultThreadFactory());
this.timeoutExecutor.setRemoveOnCancelPolicy(true);
}
protected final void startThreads(Runnable task) {
if (!isFixedThreadPool()) {
for (int i = 0; i < internalThreadCount; i++) {
startInternalThread(task);
threadCount.incrementAndGet();
}
}
if (pool.poolSize() > 0) {
task = bindToGroup(task);
try {
for (int i = 0; i < pool.poolSize(); i++) {
pool.executor().execute(task);
threadCount.incrementAndGet();
}
} catch (RejectedExecutionException x) {
// nothing we can do
}
}
}
/** Invoked by tasks as they terminate */
final int threadExit(Runnable task, boolean replaceMe) {
if (replaceMe) {
try {
if (Invoker.isBoundToAnyGroup()) {
// submit new task to replace this thread
pool.executor().execute(bindToGroup(task));
} else {
// replace internal thread
startInternalThread(task);
}
return threadCount.get();
} catch (RejectedExecutionException x) {
// unable to replace
}
}
return threadCount.decrementAndGet();
}
final boolean isFixedThreadPool() {
return pool.isFixedThreadPool();
}
final ExecutorService executor() {
return pool.executor();
}
@Override
public final boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
return pool.executor().awaitTermination(timeout, unit);
}
@Override
public final boolean isTerminated() {
return pool.executor().isTerminated();
}
@Test(timeout = 20000)
public void testUpdatingThreadPoolSettings() throws Exception {
internalCluster().startNodesAsync(2).get();
ThreadPool threadPool = internalCluster().getDataNodeInstance(ThreadPool.class);
// Check that settings are changed
assertThat(
((ThreadPoolExecutor) threadPool.executor(Names.SEARCH)).getKeepAliveTime(TimeUnit.MINUTES),
equalTo(5L));
client()
.admin()
.cluster()
.prepareUpdateSettings()
.setTransientSettings(settingsBuilder().put("threadpool.search.keep_alive", "10m").build())
.execute()
.actionGet();
assertThat(
((ThreadPoolExecutor) threadPool.executor(Names.SEARCH)).getKeepAliveTime(TimeUnit.MINUTES),
equalTo(10L));
// Make sure that threads continue executing when executor is replaced
final CyclicBarrier barrier = new CyclicBarrier(2);
Executor oldExecutor = threadPool.executor(Names.SEARCH);
threadPool
.executor(Names.SEARCH)
.execute(
new Runnable() {
@Override
public void run() {
try {
barrier.await();
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
} catch (BrokenBarrierException ex) {
//
}
}
});
client()
.admin()
.cluster()
.prepareUpdateSettings()
.setTransientSettings(settingsBuilder().put("threadpool.search.type", "fixed").build())
.execute()
.actionGet();
assertThat(threadPool.executor(Names.SEARCH), not(sameInstance(oldExecutor)));
assertThat(((ThreadPoolExecutor) oldExecutor).isShutdown(), equalTo(true));
assertThat(((ThreadPoolExecutor) oldExecutor).isTerminating(), equalTo(true));
assertThat(((ThreadPoolExecutor) oldExecutor).isTerminated(), equalTo(false));
barrier.await();
// Make sure that new thread executor is functional
threadPool
.executor(Names.SEARCH)
.execute(
new Runnable() {
@Override
public void run() {
try {
barrier.await();
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
} catch (BrokenBarrierException ex) {
//
}
}
});
client()
.admin()
.cluster()
.prepareUpdateSettings()
.setTransientSettings(settingsBuilder().put("threadpool.search.type", "fixed").build())
.execute()
.actionGet();
barrier.await();
Thread.sleep(200);
// Check that node info is correct
NodesInfoResponse nodesInfoResponse =
client().admin().cluster().prepareNodesInfo().all().execute().actionGet();
for (int i = 0; i < 2; i++) {
NodeInfo nodeInfo = nodesInfoResponse.getNodes()[i];
boolean found = false;
for (ThreadPool.Info info : nodeInfo.getThreadPool()) {
if (info.getName().equals(Names.SEARCH)) {
assertThat(info.getType(), equalTo("fixed"));
found = true;
break;
}
}
assertThat(found, equalTo(true));
Map<String, Object> poolMap =
getPoolSettingsThroughJson(nodeInfo.getThreadPool(), Names.SEARCH);
}
}