/* starts the socket server */
private void startServer(boolean isDaemon, int pause) {
// try to connect, if no connection then start new server
try {
System.err.println("testing connection");
getClient().process("test");
} catch (Exception ioe) {
System.err.println("no connection, so starting server");
// no connection, so start server
server =
new ServerThread(
getModuleName() + "-server",
getCodeCall() + " " + getPort() + " " + getParams(),
isDaemon);
server.start();
try {
// pause to allow loading data for some modules
Thread.sleep(pause);
} catch (Exception e) {
System.err.println(e);
}
// keep a reference to the process provided through the thread to be
// able to destroy it when the module gets destroyed. Otherwise,
// the process continues to run in the background even when the
// module has been destroyed.
p = server.getProcess();
return;
}
}
/**
* processes the input String and produces an output String.
*
* @param input the String to input to the underlying process
* @throws java.lang.Exception exceptions from Runtime and Process that this class uses
* @return the output from the underlying process
*/
public String process(String input) throws Exception {
String returnValue = new String();
StringBuffer buffer = new StringBuffer();
if (socketServer == true) {
returnValue = client.process(input);
ServerThread current = getServer();
if (current != null) {
if (!current.isDaemon()) {
current.getProcess().destroy();
}
current.interrupt();
}
} else { // not a socket server
Runtime rt = Runtime.getRuntime();
String output = "";
String errors = "";
try {
p = rt.exec(getCodeCall() + " " + getParams());
PrintStream processInputStream = new PrintStream(p.getOutputStream(), true, "utf-8");
processInputStream.println(input + "\n\u0003"); // put in garbage to kill Bikel's loop
StreamConsumer errorConsumer = new StreamConsumer(p.getErrorStream(), "error", 1);
StreamConsumer outputConsumer = new StreamConsumer(p.getInputStream(), "output", 10);
outputConsumer.start();
errorConsumer.start();
int countloops = 0;
int time = 0;
String message = "";
while (!outputConsumer.isComplete()) {
// wait
Thread.sleep(100);
countloops++;
time += 100; // one tenth of a second
if (time > waittime) { // just wait 5 minutes
message = "exceeded waittime of " + waittime + " milliseconds";
break;
}
}
errors = errorConsumer.getOutput();
output = outputConsumer.getOutput();
if (!message.equals("")) {
errors = message;
}
} catch (IOException ioe) {
System.err.println("Module error: " + getModuleName());
ioe.printStackTrace();
System.exit(0);
}
p.destroy();
if (errors.equals("")) {
returnValue = output;
} else {
returnValue = errors;
}
}
return returnValue;
}
