@Override
public void shutdown() {
if (!isLauncherRunning()) {
return;
}
try {
// Send a shutdown command to the launcher
protocol.sendRequestWithoutResponse(MessageType.MSG_SHUTDOWN, null);
} catch (IOException e) {
// If launcher has already been shutdown, this shouldn't create an exception, all we want to
// do is to make sure the protocol is down
}
try {
// Then shutdown the protocol connection
protocol.shutdown();
} catch (IOException e) {
throw new OperaRunnerException("Unable to shut down launcher", e);
} finally {
binary.shutdown();
protocol = null;
binary = null;
}
}
/**
* {@inheritDoc}
*
* @throws OperaRunnerException if launcher is shut down or not running
*/
@Override
public void startOpera() throws OperaRunnerException {
assertLauncherAlive();
try {
byte[] request = LauncherStartRequest.newBuilder().build().toByteArray();
ResponseEncapsulation res = protocol.sendRequest(MessageType.MSG_START, request);
if (handleStatusMessage(res.getResponse()) != StatusType.RUNNING) {
throw new IOException("launcher unable to start binary");
}
// Check Opera hasn't immediately exited (e.g. due to unknown arguments)
try {
Thread.sleep(OperaIntervals.PROCESS_START_SLEEP.getMs());
} catch (InterruptedException e) {
// nothing
}
res = protocol.sendRequest(MessageType.MSG_STATUS, request);
if (handleStatusMessage(res.getResponse()) != StatusType.RUNNING) {
throw new IOException(
"Opera exited immediately; possibly incorrect arguments? Command: "
+ binary.getCommands());
}
} catch (IOException e) {
throw new OperaRunnerException("Could not start Opera: " + e.getMessage());
}
}
private boolean isLauncherRunning() {
return binary != null && binary.isRunning();
}
