/** Prints the current state of the remote experiment. */
protected void printCurrentState() {
if (isRemExpConnected) Debg.print(NanoComm.strInfo(NanoComm.INFO_REMEXP_CONNECTED));
else Debg.print(NanoComm.strInfo(NanoComm.INFO_REMEXP_DISCONNECTED));
Debg.print(NanoComm.strState(currentState));
Debg.print(NanoComm.strParam(NanoComm.PARAM_SAMPLESCLEAR + " value=all"));
for (Sample s : allSamples) {
Debg.print(
NanoComm.strParam(
NanoComm.PARAM_SAMPLEINFO
+ " value="
+ s.getSampleID()
+ " name="
+ s.getSampleName()
+ " command="
+ s.getLockCommand()));
}
Debg.print(NanoComm.strParam(NanoComm.PARAM_SCANRANGE + " value=" + scanRange));
int smpl;
if (currentSample == null) smpl = -1;
else smpl = currentSample.getSampleID();
Debg.print(NanoComm.strParam(NanoComm.PARAM_STAGEPOSITION + " value=" + smpl));
Debg.print(NanoComm.strParam(NanoComm.PARAM_SCANSTART + " value=" + scanStart));
Debg.print(NanoComm.strParam(NanoComm.PARAM_REMEXPNAME + " value=" + remExpName));
}
/** Checks the lockHolder for timeout on the lock. */
@Override
public void doTask() {
if (lockHolder != null) {
long now = new Date().getTime();
if (lockStarted + lockHolder.getLockTimeoutInSeconds() * 1000 < now) {
setLock(lockHolder.takeAbortActions("Lock timed out"));
Debg.print("Lock timed out, took abort actions");
lockStarted = 0;
}
}
processNextClientRequest();
try {
Thread.sleep(500);
} catch (InterruptedException e) {
Debg.err("Failed sleeping");
}
}
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);
}
}
/**
* The constructor for this command processing class. It links to the FilteringPool instance to
* pass actions towards the remote experiment server.
*
* @param chief The restricted server instance that runs as middleware between the clients and the
* remote experiments server.
*/
public RemoteExperimentMonitor(FilteringPool chief) {
remExpName = "RemExp";
pool = chief;
qClientRequests = new ConcurrentLinkedQueue();
initParser();
allSamples = new Vector<Sample>();
initMonitorVars();
setLock(null);
lastStreamData = null;
scanStart = -1;
super.start(this.getClass().getSimpleName());
Debg.print("Remote experiments monitor initialized");
}
/**
* Sets and broadcasts information about the connectivity and state of the remote experiment.
*
* @param isConnected true if connected, else false
*/
protected void setRemExpConnected(boolean isConnected) {
Debg.print("Remote Experiment connected: " + isConnected);
isRemExpConnected = isConnected;
if (isConnected) {
currentState = NanoComm.STATE_STAGECALIBRATED;
broadcastToClients(NanoComm.strState(currentState));
broadcastToClients(NanoComm.strInfo(NanoComm.INFO_REMEXP_CONNECTED));
} else {
initMonitorVars();
currentState = NanoComm.STATE_UNAVAILABLE;
broadcastToClients(NanoComm.strState(currentState));
}
}
/**
* This method is used to set and broadcast the actual state of the remote experiment.
*
* @param state The state the remote experiment monitor is in now.
*/
public void setCurrentState(int state) {
currentState = state;
broadcastToClients(NanoComm.strState(currentState));
Debg.print("Setting state " + state);
}
/**
* Passes a message to the pool which will apss it further to the remote experiment.
*
* @param msg
*/
public void sendToRemExp(String msg) {
Debg.print("sending to remexp: " + msg);
if (pool != null) {
pool.sendToRemExp(msg);
}
}
