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/*
* Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
*
*
* Used in conjunction to EchoService to test System.inheritedChannel().
*
* The first test is the TCP echo test. A service is launched with a TCP
* socket and a TCP message is sent to the service. The test checks that
* the message is correctly echoed.
*
* The second test is a UDP echo test. A service is launched with a UDP
* socket and a UDP packet is sent to the service. The test checks that
* the packet is correctly echoed.
*
*/
import java.io.IOException;
import java.net.DatagramPacket;
import java.nio.ByteBuffer;
import java.nio.channels.DatagramChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.util.Random;
public class EchoTest {
private static int failures = 0;
private static String ECHO_SERVICE = "EchoService";
/*
* Sends a message with random bytes to the service, and then waits for
* a reply (with timeout). Once the reply is received it is checked to ensure
* that it matches the original message.
*/
private static void TCPEchoTest() throws IOException {
SocketChannel sc = Launcher.launchWithSocketChannel(ECHO_SERVICE, null);
String msg = "Where's that damn torpedo?";
int repeat = 100;
int size = msg.length() * repeat;
// generate bytes into a buffer and send it to the service
ByteBuffer bb1 = ByteBuffer.allocate(size);
Random gen = new Random();
for (int i=0; i<repeat; i++) {
bb1.put(msg.getBytes("UTF-8"));
}
bb1.flip();
sc.write(bb1);
// now we put the channel into non-blocking mode and we read the
// reply from the service into a second buffer.
ByteBuffer bb2 = ByteBuffer.allocate(size+100);
sc.configureBlocking(false);
Selector sel = sc.provider().openSelector();
SelectionKey sk = sc.register(sel, SelectionKey.OP_READ);
int nread = 0;
long to = 5000;
while (nread < size) {
long st = System.currentTimeMillis();
sel.select(to);
if (sk.isReadable()) {
int n = sc.read(bb2);
if (n > 0) {
nread += n;
}
if (n < 0) {
break; // EOF
}
}
sel.selectedKeys().remove(sk);
to -= System.currentTimeMillis() - st;
if (to <= 0) {
break;
}
}
sc.close();
// and compare the response
boolean err = false;
if (nread != size) {
err = true;
} else {
bb1.flip();
bb2.flip();
while (bb1.hasRemaining()) {
if (bb1.get() != bb2.get()) {
err = true;
}
}
}
// if error print out the response from the service (could be a stack trace)
if (err) {
System.err.println("Bad response or premature EOF, bytes read: ");
bb2.flip();
while (bb2.hasRemaining()) {
char c = (char)bb2.get();
System.out.print(c);
}
throw new RuntimeException("Bad response or premature EOF from service");
}
}
/*
* Send a UDP packet to the service, wait for a reply (with timeout). Finally
* check that the packet is the same length as the original.
*/
private static void UDPEchoTest() throws IOException {
DatagramChannel dc = Launcher.launchWithDatagramChannel(ECHO_SERVICE, null);
String msg = "I was out saving the galaxy when your grandfather was in diapers";
ByteBuffer bb = ByteBuffer.wrap(msg.getBytes("UTF-8"));
dc.write(bb);
// and receive the echo
byte b[] = new byte[msg.length() + 100];
DatagramPacket pkt2 = new DatagramPacket(b, b.length);
dc.socket().setSoTimeout(5000);
dc.socket().receive(pkt2);
if (pkt2.getLength() != msg.length()) {
throw new RuntimeException("Received packet of incorrect length");
}
dc.close();
}
public static void main(String args[]) throws IOException {
// TCP echo
try {
TCPEchoTest();
System.out.println("TCP echo test passed.");
} catch (Exception x) {
System.err.println(x);
failures++;
}
// UDP echo
try {
UDPEchoTest();
System.out.println("UDP echo test passed.");
} catch (Exception x) {
x.printStackTrace();
System.err.println(x);
failures++;
}
if (failures > 0) {
throw new RuntimeException("Test failed - see log for details");
}
}
}
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