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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/* @test
* @bug 4607272 6842687
* @summary Unit test for AsynchronousChannelGroup
*/
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.net.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.io.IOException;
/**
* Tests that the completion handler is invoked by a thread with
* the expected identity.
*/
public class Identity {
static final Random rand = new Random();
static final CountDownLatch done = new CountDownLatch(1);
static final AtomicBoolean failed = new AtomicBoolean(false);
static void fail(String msg) {
failed.set(true);
done.countDown();
throw new RuntimeException(msg);
}
// thread-local identifies the thread
private static final ThreadLocal<Integer> myGroup =
new ThreadLocal<Integer>() {
@Override protected Integer initialValue() {
return Integer.valueOf(-1);
}
};
// creates a ThreadFactory that constructs groups with the given identity
static final ThreadFactory createThreadFactory(final int groupId) {
return new ThreadFactory() {
@Override
public Thread newThread(final Runnable r) {
Thread t = new Thread(new Runnable() {
public void run() {
myGroup.set(groupId);
r.run();
}});
t.setDaemon(true);
return t;
}
};
}
public static void main(String[] args) throws Exception {
// create listener to accept connections
final AsynchronousServerSocketChannel listener =
AsynchronousServerSocketChannel.open()
.bind(new InetSocketAddress(0));
listener.accept((Void)null, new CompletionHandler<AsynchronousSocketChannel,Void>() {
public void completed(final AsynchronousSocketChannel ch, Void att) {
listener.accept((Void)null, this);
final ByteBuffer buf = ByteBuffer.allocate(100);
ch.read(buf, ch, new CompletionHandler<Integer,AsynchronousSocketChannel>() {
public void completed(Integer bytesRead, AsynchronousSocketChannel ch) {
if (bytesRead < 0) {
try { ch.close(); } catch (IOException ignore) { }
} else {
buf.clear();
ch.read(buf, ch, this);
}
}
public void failed(Throwable exc, AsynchronousSocketChannel ch) {
try { ch.close(); } catch (IOException ignore) { }
}
});
}
public void failed(Throwable exc, Void att) {
}
});
int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort();
SocketAddress sa = new InetSocketAddress(InetAddress.getLocalHost(), port);
// create 3-10 channels, each in its own group
final int groupCount = 3 + rand.nextInt(8);
AsynchronousChannelGroup[] groups = new AsynchronousChannelGroup[groupCount];
final AsynchronousSocketChannel[] channels = new AsynchronousSocketChannel[groupCount];
for (int i=0; i<groupCount; i++) {
ThreadFactory factory = createThreadFactory(i);
AsynchronousChannelGroup group;
if (rand.nextBoolean()) {
int nThreads = 1 + rand.nextInt(10);
group = AsynchronousChannelGroup.withFixedThreadPool(nThreads, factory);
} else {
ExecutorService pool = Executors.newCachedThreadPool(factory);
group = AsynchronousChannelGroup.withCachedThreadPool(pool, rand.nextInt(5));
}
groups[i] = group;
// create channel in group and connect it to the server
AsynchronousSocketChannel ch = AsynchronousSocketChannel.open(group);
ch.connect(sa).get();
channels[i] = ch;
}
// randomly write to each channel, ensuring that the completion handler
// is always invoked by a thread with the right identity.
final AtomicInteger writeCount = new AtomicInteger(100);
channels[0].write(getBuffer(), 0, new CompletionHandler<Integer,Integer>() {
public void completed(Integer bytesWritten, Integer groupId) {
if (bytesWritten != 1)
fail("Expected 1 byte to be written");
if (!myGroup.get().equals(groupId))
fail("Handler invoked by thread with the wrong identity");
if (writeCount.decrementAndGet() > 0) {
int id = rand.nextInt(groupCount);
channels[id].write(getBuffer(), id, this);
} else {
done.countDown();
}
}
public void failed(Throwable exc, Integer groupId) {
fail(exc.getMessage());
}
});
// wait until done
done.await();
// clean-up
for (AsynchronousSocketChannel ch: channels)
ch.close();
for (AsynchronousChannelGroup group: groups)
group.shutdownNow();
listener.close();
if (failed.get())
throw new RuntimeException("Test failed - see log for details");
}
static ByteBuffer getBuffer() {
ByteBuffer buf;
if (rand.nextBoolean()) {
buf = ByteBuffer.allocateDirect(1);
} else {
buf = ByteBuffer.allocate(1);
}
buf.put((byte)0);
buf.flip();
return buf;
}
}