private void processNextClientRequest() {
QueueEntry qe = (QueueEntry) qClientRequests.poll();
if (qe != null) {
EventSocket sock = qe.sock;
String message = qe.message;
boolean isAllowed = false;
LockHolder lock = getLockForCommand(message);
if (lock != null) {
// if the lock exists check whether the user is allowed to use this command
int[] privs = lock.getAllowedPrivileges();
for (int priv : privs) if (priv == sock.getPrivilege()) isAllowed = true;
if (isAllowed) {
if (lockHolder == null) { // if no lock is set we try to execute the command
setLock(lock.setLockAction(message));
Debg.print("lock set and executed");
} else { // if a lock is already set the command might contain an abort message
String cmd = Parser.getValue(message, NanoComm.COMMAND_CMD);
String[] abortCmds = lockHolder.getAbortCommands();
boolean isAbortable = false;
if (abortCmds != null)
for (int i = 0; i < abortCmds.length; i++) {
if (cmd.equals(abortCmds[i])) isAbortable = true;
}
if (isAbortable) {
setLock(lockHolder.takeAbortActions("Overwriting command has been sent"));
} else sock.sendClientInfo("Please be patient, the remote experiment is still busy");
}
} else sock.sendClientInfo("Sorry, you are not allowed to use this command!");
} else Debg.print("No lock found for: " + message);
}
if (qClientRequests.size() > 10) {
Debg.err(
"I have been flooded by "
+ qClientRequests.size()
+ " client requests! I dropped everything except for the oldest one");
qe = (QueueEntry) qClientRequests.poll();
qClientRequests.clear();
qClientRequests.add(qe);
}
}
/**
* Informs the new client about the current state of the remote experiment. Sets the correct
* parameters in the gui when a new client connects or changes his privileges.
*
* @param sock The socket that needs to be informed.
*/
protected void sendCurrentStateTo(EventSocket sock) {
sock.put(NanoComm.strPriv(sock.getPrivilege()));
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
}
if (isRemExpConnected) sock.put(NanoComm.strInfo(NanoComm.INFO_REMEXP_CONNECTED));
else sock.put(NanoComm.strInfo(NanoComm.INFO_REMEXP_DISCONNECTED));
sock.put(NanoComm.strState(currentState));
sock.put(NanoComm.strParam(NanoComm.PARAM_SAMPLESCLEAR + " value=all"));
for (Sample s : allSamples) {
sock.put(
NanoComm.strParam(
NanoComm.PARAM_SAMPLEINFO
+ " value="
+ s.getSampleID()
+ " name="
+ s.getSampleName()
+ " command="
+ s.getLockCommand()));
}
sock.put(NanoComm.strParam(NanoComm.PARAM_SCANRANGE + " value=" + scanRange));
int smpl;
if (currentSample == null) smpl = -1;
else smpl = currentSample.getSampleID();
sock.put(NanoComm.strParam(NanoComm.PARAM_STAGEPOSITION + " value=" + smpl));
sock.put(NanoComm.strParam(NanoComm.PARAM_SCANSTART + " value=" + scanStart));
sock.put(NanoComm.strParam(NanoComm.PARAM_REMEXPNAME + " value=" + remExpName));
sock.sendClientInfo("Welcome to the RAFM of the University of Basel!");
}