author | alanb |
Mon, 04 May 2009 19:25:14 +0100 | |
changeset 2705 | 27b7f2d5e949 |
child 3327 | 82e069ae54ab |
permissions | -rw-r--r-- |
2705
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/* |
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* Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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|
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/* @test |
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* @bug 6834246 |
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* @summary Stress test connections through the loopback interface |
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*/ |
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import java.nio.ByteBuffer; |
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import java.net.*; |
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import java.nio.channels.*; |
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import java.util.Random; |
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import java.io.IOException; |
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public class StressLoopback { |
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static final Random rand = new Random(); |
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public static void main(String[] args) throws Exception { |
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// setup listener |
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AsynchronousServerSocketChannel listener = |
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AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(0)); |
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int port =((InetSocketAddress)(listener.getLocalAddress())).getPort(); |
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InetAddress lh = InetAddress.getLocalHost(); |
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SocketAddress remote = new InetSocketAddress(lh, port); |
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// create sources and sinks |
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int count = 2 + rand.nextInt(9); |
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Source[] source = new Source[count]; |
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Sink[] sink = new Sink[count]; |
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for (int i=0; i<count; i++) { |
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AsynchronousSocketChannel ch = AsynchronousSocketChannel.open(); |
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ch.connect(remote).get(); |
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source[i] = new Source(ch); |
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sink[i] = new Sink(listener.accept().get()); |
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} |
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// start the sinks and sources |
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for (int i=0; i<count; i++) { |
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sink[i].start(); |
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source[i].start(); |
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} |
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// let the test run for a while |
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Thread.sleep(20*1000); |
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// wait until everyone is done |
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boolean failed = false; |
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long total = 0L; |
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for (int i=0; i<count; i++) { |
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long nwrote = source[i].finish(); |
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long nread = sink[i].finish(); |
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if (nread != nwrote) |
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failed = true; |
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System.out.format("%d -> %d (%s)\n", |
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nwrote, nread, (failed) ? "FAIL" : "PASS"); |
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total += nwrote; |
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} |
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if (failed) |
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throw new RuntimeException("Test failed - see log for details"); |
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System.out.format("Total sent %d MB\n", total / (1024L * 1024L)); |
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} |
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/** |
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* Writes bytes to a channel until "done". When done the channel is closed. |
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*/ |
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static class Source { |
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private final AsynchronousByteChannel channel; |
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private final ByteBuffer sentBuffer; |
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private volatile long bytesSent; |
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private volatile boolean finished; |
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Source(AsynchronousByteChannel channel) { |
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this.channel = channel; |
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int size = 1024 + rand.nextInt(10000); |
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this.sentBuffer = (rand.nextBoolean()) ? |
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ByteBuffer.allocateDirect(size) : ByteBuffer.allocate(size); |
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} |
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void start() { |
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sentBuffer.position(0); |
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sentBuffer.limit(sentBuffer.capacity()); |
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channel.write(sentBuffer, null, new CompletionHandler<Integer,Void> () { |
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public void completed(Integer nwrote, Void att) { |
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bytesSent += nwrote; |
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if (finished) { |
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closeUnchecked(channel); |
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} else { |
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sentBuffer.position(0); |
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sentBuffer.limit(sentBuffer.capacity()); |
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channel.write(sentBuffer, null, this); |
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} |
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} |
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public void failed(Throwable exc, Void att) { |
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exc.printStackTrace(); |
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closeUnchecked(channel); |
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} |
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public void cancelled(Void att) { |
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} |
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119 |
}); |
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} |
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121 |
|
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long finish() { |
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finished = true; |
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waitUntilClosed(channel); |
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return bytesSent; |
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126 |
} |
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127 |
} |
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128 |
|
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129 |
/** |
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* Read bytes from a channel until EOF is received. |
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131 |
*/ |
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static class Sink { |
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private final AsynchronousByteChannel channel; |
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private final ByteBuffer readBuffer; |
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private volatile long bytesRead; |
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136 |
|
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Sink(AsynchronousByteChannel channel) { |
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this.channel = channel; |
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int size = 1024 + rand.nextInt(10000); |
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this.readBuffer = (rand.nextBoolean()) ? |
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ByteBuffer.allocateDirect(size) : ByteBuffer.allocate(size); |
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142 |
} |
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143 |
|
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144 |
void start() { |
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channel.read(readBuffer, null, new CompletionHandler<Integer,Void> () { |
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146 |
public void completed(Integer nread, Void att) { |
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if (nread < 0) { |
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closeUnchecked(channel); |
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149 |
} else { |
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bytesRead += nread; |
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readBuffer.clear(); |
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channel.read(readBuffer, null, this); |
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153 |
} |
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154 |
} |
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155 |
public void failed(Throwable exc, Void att) { |
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exc.printStackTrace(); |
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closeUnchecked(channel); |
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158 |
} |
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159 |
public void cancelled(Void att) { |
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160 |
} |
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161 |
}); |
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162 |
} |
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163 |
|
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164 |
long finish() { |
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waitUntilClosed(channel); |
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166 |
return bytesRead; |
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167 |
} |
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168 |
} |
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169 |
|
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170 |
static void waitUntilClosed(Channel c) { |
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while (c.isOpen()) { |
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try { |
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Thread.sleep(100); |
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} catch (InterruptedException ignore) { } |
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175 |
} |
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176 |
} |
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177 |
|
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static void closeUnchecked(Channel c) { |
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try { |
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c.close(); |
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} catch (IOException ignore) { } |
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182 |
} |
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183 |
} |