public void cancel() {
ShellProcess process = current.get();
if (process != null) {
process.cancel();
} else {
writer.println();
writer.print(getPrompt());
writer.flush();
}
}
public void run() {
//
String welcome = shell.getWelcome();
writer.println(welcome);
writer.flush();
//
while (true) {
String prompt = getPrompt();
String line;
try {
writer.println();
writer.flush();
if ((line = reader.readLine(prompt)) == null) {
break;
}
} catch (IOException e) {
// What should we do other than that ?
break;
}
//
ShellProcess process = shell.createProcess(line);
JLineProcessContext context = new JLineProcessContext(this);
current.set(process);
try {
process.execute(context);
try {
context.latch.await();
} catch (InterruptedException ignore) {
// At the moment
}
} finally {
current.set(null);
}
ShellResponse response = context.resp.get();
//
if (response instanceof ShellResponse.Cancelled) {
// Do nothing
} else if (response instanceof ShellResponse.Close) {
break;
} else {
response.getReader().writeAnsiTo(writer);
writer.flush();
}
}
}
public void cancel() {
// Construcuted -> ISE
// Evaluating -> Canceled
// Queued -> Canceled
// Cancelled -> Cancelled
// Terminated -> Terminated
boolean cancel;
synchronized (lock) {
switch (status) {
case CONSTRUCTED:
throw new IllegalStateException(
"Cannot call cancel on process that was not scheduled for execution yet");
case QUEUED:
status = Status.CANCELED;
cancel = false;
break;
case EVALUATING:
status = Status.CANCELED;
cancel = true;
break;
default:
cancel = false;
break;
}
}
//
if (cancel) {
callee.cancel();
}
}