/
MessageInputStreamTest.java
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/
MessageInputStreamTest.java
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//
// ========================================================================
// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.common.message;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.jetty.io.ByteBufferPool;
import org.eclipse.jetty.io.MappedByteBufferPool;
import org.eclipse.jetty.toolchain.test.jupiter.WorkDir;
import org.eclipse.jetty.toolchain.test.jupiter.WorkDirExtension;
import org.eclipse.jetty.util.BlockingArrayQueue;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.websocket.api.SuspendToken;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import static java.time.Duration.ofSeconds;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
@ExtendWith(WorkDirExtension.class)
public class MessageInputStreamTest
{
public WorkDir testdir;
public ByteBufferPool bufferPool = new MappedByteBufferPool();
@Test
public void testBasicAppendRead() throws IOException
{
StreamTestSession session = new StreamTestSession();
MessageInputStream stream = new MessageInputStream(session);
session.setMessageInputStream(stream);
// Append a single message (simple, short)
ByteBuffer payload = BufferUtil.toBuffer("Hello World!", StandardCharsets.UTF_8);
session.addContent(payload, true);
session.provideContent();
// Read entire message it from the stream.
byte[] buf = new byte[32];
int len = stream.read(buf);
String message = new String(buf, 0, len, StandardCharsets.UTF_8);
// Test it
assertThat("Message", message, is("Hello World!"));
}
@Test
public void testBlockOnRead() throws Exception
{
StreamTestSession session = new StreamTestSession();
MessageInputStream stream = new MessageInputStream(session);
session.setMessageInputStream(stream);
new Thread(session::provideContent).start();
final AtomicBoolean hadError = new AtomicBoolean(false);
final CountDownLatch startLatch = new CountDownLatch(1);
// This thread fills the stream (from the "worker" thread)
// But slowly (intentionally).
new Thread(() ->
{
try
{
startLatch.countDown();
TimeUnit.MILLISECONDS.sleep(200);
session.addContent("Saved", false);
TimeUnit.MILLISECONDS.sleep(200);
session.addContent(" by ", false);
TimeUnit.MILLISECONDS.sleep(200);
session.addContent("Zero", false);
TimeUnit.MILLISECONDS.sleep(200);
session.addContent("", true);
}
catch (Throwable t)
{
hadError.set(true);
t.printStackTrace(System.err);
}
}).start();
Assertions.assertTimeoutPreemptively(ofSeconds(5), () ->
{
// wait for thread to start
startLatch.await();
// Read it from the stream.
ByteArrayOutputStream out = new ByteArrayOutputStream();
IO.copy(stream, out);
byte[] bytes = out.toByteArray();
String message = new String(bytes, 0, bytes.length, StandardCharsets.UTF_8);
// Test it
assertThat("Error when appending", hadError.get(), is(false));
assertThat("Message", message, is("Saved by Zero"));
});
}
@Test
public void testBlockOnReadInitial() throws IOException
{
StreamTestSession session = new StreamTestSession();
MessageInputStream stream = new MessageInputStream(session);
session.setMessageInputStream(stream);
session.addContent("I will conquer", true);
AtomicReference<Throwable> error = new AtomicReference<>();
new Thread(() ->
{
try
{
// wait for a little bit before initiating write to stream
TimeUnit.MILLISECONDS.sleep(1000);
session.provideContent();
}
catch (Throwable t)
{
error.set(t);
t.printStackTrace(System.err);
}
}).start();
Assertions.assertTimeoutPreemptively(ofSeconds(10), () ->
{
// Read byte from stream, block until byte received.
int b = stream.read();
assertThat("Initial byte", b, is((int)'I'));
// No error occurred.
assertNull(error.get());
});
}
@Test
public void testReadByteNoBuffersClosed() throws IOException
{
try (MessageInputStream stream = new MessageInputStream(new EmptySession()))
{
final AtomicBoolean hadError = new AtomicBoolean(false);
new Thread(() ->
{
try
{
// wait for a little bit before sending input closed
TimeUnit.MILLISECONDS.sleep(1000);
stream.appendFrame(null, true);
stream.messageComplete();
}
catch (InterruptedException | IOException e)
{
hadError.set(true);
e.printStackTrace(System.err);
}
}).start();
Assertions.assertTimeoutPreemptively(ofSeconds(10), () ->
{
// Read byte from stream. Should be a -1, indicating the end of the stream.
int b = stream.read();
assertThat("Initial byte", b, is(-1));
// No error occurred.
assertThat("Error when appending", hadError.get(), is(false));
});
}
}
@Test
public void testSplitMessageWithEmptyPayloads() throws IOException
{
StreamTestSession session = new StreamTestSession();
MessageInputStream stream = new MessageInputStream(session);
session.setMessageInputStream(stream);
session.addContent("", false);
session.addContent("Hello", false);
session.addContent("", false);
session.addContent(" World", false);
session.addContent("!", false);
session.addContent("", true);
session.provideContent();
// Read entire message it from the stream.
ByteArrayOutputStream out = new ByteArrayOutputStream();
IO.copy(stream, out);
byte[] bytes = out.toByteArray();
String message = new String(bytes, 0, bytes.length, StandardCharsets.UTF_8);
// Test it
assertThat("Message", message, is("Hello World!"));
}
@Test
public void testReadBeforeFirstAppend() throws IOException
{
StreamTestSession session = new StreamTestSession();
MessageInputStream stream = new MessageInputStream(session);
session.setMessageInputStream(stream);
// Append a single message (simple, short)
session.addContent(BufferUtil.EMPTY_BUFFER, false);
session.addContent("Hello World", true);
new Thread(() ->
{
try
{
Thread.sleep(2000);
session.provideContent();
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}).start();
// Read entire message it from the stream.
byte[] buf = new byte[32];
int len = stream.read(buf);
String message = new String(buf, 0, len, StandardCharsets.UTF_8);
// Test it
assertThat("Message", message, is("Hello World"));
}
public static class StreamTestSession extends EmptySession
{
private static final ByteBuffer EOF = BufferUtil.allocate(0);
private final AtomicBoolean suspended = new AtomicBoolean(false);
private BlockingArrayQueue<ByteBuffer> contentQueue = new BlockingArrayQueue<>();
private MessageInputStream stream;
public void setMessageInputStream(MessageInputStream stream)
{
this.stream = stream;
}
public void addContent(String content, boolean last)
{
addContent(BufferUtil.toBuffer(content, StandardCharsets.UTF_8), last);
}
public void addContent(ByteBuffer content, boolean last)
{
contentQueue.add(content);
if (last)
contentQueue.add(EOF);
}
public void provideContent()
{
pollAndAppendFrame();
}
@Override
public void resume()
{
if (!suspended.compareAndSet(true, false))
throw new IllegalStateException();
pollAndAppendFrame();
}
@Override
public SuspendToken suspend()
{
if (!suspended.compareAndSet(false, true))
throw new IllegalStateException();
return super.suspend();
}
private void pollAndAppendFrame()
{
try
{
while (true)
{
ByteBuffer content = contentQueue.poll(10, TimeUnit.SECONDS);
assertNotNull(content);
boolean eof = (content == EOF);
stream.appendFrame(content, eof);
if (eof)
{
stream.messageComplete();
break;
}
if (suspended.get())
break;
}
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}
}