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/*
* Copyright (c) 2016, 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.
*/
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import com.sun.jdi.VMDisconnectedException;
import com.sun.jdi.VirtualMachine;
import jdk.jshell.execution.JdiExecutionControl;
import jdk.jshell.execution.JdiInitiator;
import jdk.jshell.execution.Util;
import jdk.jshell.spi.ExecutionControl;
import jdk.jshell.spi.ExecutionControl.EngineTerminationException;
import jdk.jshell.spi.ExecutionEnv;
import static org.testng.Assert.fail;
import static jdk.jshell.execution.Util.remoteInputOutput;
class MyExecutionControl extends JdiExecutionControl {
private static final String REMOTE_AGENT = MyRemoteExecutionControl.class.getName();
private static final int TIMEOUT = 2000;
private VirtualMachine vm;
private Process process;
/**
* Creates an ExecutionControl instance based on a JDI
* {@code ListeningConnector} or {@code LaunchingConnector}.
*
* Initialize JDI and use it to launch the remote JVM. Set-up a socket for
* commands and results. This socket also transports the user
* input/output/error.
*
* @param env the context passed by
* {@link jdk.jshell.spi.ExecutionControl#start(jdk.jshell.spi.ExecutionEnv) }
* @return the channel
* @throws IOException if there are errors in set-up
*/
static ExecutionControl make(ExecutionEnv env, UserJdiUserRemoteTest test) throws IOException {
try (final ServerSocket listener = new ServerSocket(0)) {
// timeout for socket
listener.setSoTimeout(TIMEOUT);
int port = listener.getLocalPort();
// Set-up the JDI connection
List<String> opts = new ArrayList<>(env.extraRemoteVMOptions());
opts.add("-classpath");
opts.add(System.getProperty("java.class.path")
+ System.getProperty("path.separator")
+ System.getProperty("user.dir"));
JdiInitiator jdii = new JdiInitiator(port,
opts, REMOTE_AGENT, true, null, TIMEOUT, Collections.emptyMap());
VirtualMachine vm = jdii.vm();
Process process = jdii.process();
List<Consumer<String>> deathListeners = new ArrayList<>();
deathListeners.add(s -> env.closeDown());
Util.detectJdiExitEvent(vm, s -> {
for (Consumer<String> h : deathListeners) {
h.accept(s);
}
});
// Set-up the commands/reslts on the socket. Piggy-back snippet
// output.
Socket socket = listener.accept();
// out before in -- match remote creation so we don't hang
OutputStream out = socket.getOutputStream();
Map<String, OutputStream> outputs = new HashMap<>();
outputs.put("out", env.userOut());
outputs.put("err", env.userErr());
outputs.put("aux", test.auxStream);
Map<String, InputStream> input = new HashMap<>();
input.put("in", env.userIn());
ExecutionControl myec = remoteInputOutput(socket.getInputStream(),
out, outputs, input,
(objIn, objOut) -> new MyExecutionControl(objOut, objIn, vm, process, deathListeners));
test.currentEC = myec;
return myec;
}
}
/**
* Create an instance.
*
* @param out the output for commands
* @param in the input for responses
*/
private MyExecutionControl(ObjectOutput out, ObjectInput in,
VirtualMachine vm, Process process,
List<Consumer<String>> deathListeners) {
super(out, in);
this.vm = vm;
this.process = process;
deathListeners.add(s -> disposeVM());
}
@Override
public void close() {
super.close();
disposeVM();
}
private synchronized void disposeVM() {
try {
if (vm != null) {
vm.dispose(); // This could NPE, so it is caught below
vm = null;
}
} catch (VMDisconnectedException ex) {
// Ignore if already closed
} catch (Throwable e) {
fail("disposeVM threw: " + e);
} finally {
if (process != null) {
process.destroy();
process = null;
}
}
}
@Override
protected synchronized VirtualMachine vm() throws EngineTerminationException {
if (vm == null) {
throw new EngineTerminationException("VM closed");
} else {
return vm;
}
}
}
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