public void exitProcess() {
if (classLoader != null) {
// Just to get rid of the warning....
classLoader.getClass();
}
// Send a request to shutdown the spawned process and return...
classLoader = null;
}
public void spawnProcess() throws IOException, InterruptedException {
log.debug("INSIDE spawnProcess");
// Setup the classloader and determine the port used to process the incoming requests.
// TODO: make the java command configurable.
String javaHome = System.getProperty("java.home");
String javaExe = javaHome + File.separator + "bin" + File.separator + "java";
int port = -1;
String hostname = null;
ClassLoader parent = Thread.currentThread().getContextClassLoader();
parent = (ClassLoader.getSystemClassLoader() == parent) ? null : parent;
if (parent != null) {
server = new ServerSocket(0);
port = server.getLocalPort();
hostname = InetAddress.getLocalHost().getHostName();
classLoader = new SpawnerClassLoader(server, parent, identifier);
classLoader.start();
}
List<String> command = new LinkedList<String>();
command.add(javaExe);
command.addAll(jvmArgs);
command.add("-cp");
command.add(System.getProperty("java.class.path") + File.pathSeparator + spawnedClassPath);
command.add(Spawned.class.getName());
// Create a remote class loader only if the current thread has a context class loader set.
if (parent != null) {
command.add(Options.PORT);
command.add(String.valueOf(port));
command.add(Options.HOST);
command.add(hostname);
} else {
command.add(Options.NOCLASSLOADER);
}
command.add(Options.CLASSNAME);
command.add(className);
if (methodName != null) {
command.add(Options.METHODNAME);
command.add(methodName);
}
// Store the system properties to a file that will be loaded by the spawned application.
Properties props = System.getProperties();
File file = File.createTempFile("spawned", ".properties");
Writer out = new FileWriter(file);
props.store(out, "Spawned properties");
out.close();
command.add(Options.PROPERTYFILE);
command.add(file.getAbsolutePath());
log.info("command: {}", command);
ProcessBuilder processBuilder = new ProcessBuilder(command);
processBuilder = processBuilder.redirectErrorStream(true);
process = processBuilder.start();
BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));
new Thread(
new Runnable() {
private BufferedReader input;
Runnable setInput(BufferedReader input) {
this.input = input;
return this;
}
public void run() {
log.debug("Inside run");
String line;
try {
while ((line = input.readLine()) != null) {
log.info("stdout: {}", line);
}
} catch (IOException e) {
log.debug("An exception was raised while trying to read the next line", e);
}
}
}.setInput(input)) {
{
setName(Spawner.this.identifier + getName());
start();
}
};
new Thread() {
private File file;
public void run() {
try {
int result = process.waitFor();
log.info("Exiting process with: {}", result);
} catch (InterruptedException e) {
log.error("An exception was generated when waiting for process to exit", e);
} finally {
Spawner.this.processExited = true;
if (file.exists()) {
file.delete();
}
}
}
public void setFile(File file) {
this.file = file;
setName(Spawner.this.identifier + getName());
start();
}
}.setFile(file);
}
