/// The watcher thread - from the Runnable interface.
// This has to be pretty anal to avoid monitor lockup, lost
// threads, etc.
public synchronized void run() {
Thread me = Thread.currentThread();
me.setPriority(Thread.MAX_PRIORITY);
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
startTimeInNs = threadMXBean.getCurrentThreadCpuTime();
if (enabled.get()) {
do {
loop.set(false);
try {
wait(millis);
} catch (InterruptedException e) {
}
} while (enabled.get() && loop.get());
}
if (enabled.get() && targetThread.isAlive()) {
isDoneRunning.set(true);
printThread();
if (kill) {
logger.warn(
"Trying to kill thread with id:"
+ targetThread.getId()
+ " but did not as it can cause deadlocks etc.");
// targetThread.interrupt();
// targetThread.stop(); //Never kill thread - it can cause other problems
}
done();
isDoneRunning.set(false);
}
}
private void startListening() {
// if listener thread is alive and listening now, no need to recreate. Just reuse it.
if (listenerThread != null && listenerThread.isAlive()) {
return;
}
Runnable listeningAction =
() -> {
boolean running = true;
while (connected && running) {
List<String> list = getMessages();
localHistory.addAll(list);
try {
Thread.sleep(POLLING_PERIOD_MILLIS);
} catch (InterruptedException e) {
logger.error("The message listening thread was interrupted", e);
running = false;
}
}
};
listenerThread = new Thread(listeningAction);
listenerThread.start();
}
/** Stops unicast and multicast receiver threads */
void stopThreads() {
Thread tmp;
// 1. Stop the multicast receiver thread
if (mcast_receiver != null) {
if (mcast_receiver.isAlive()) {
tmp = mcast_receiver;
mcast_receiver = null;
closeMulticastSocket(); // will cause the multicast thread to terminate
tmp.interrupt();
try {
tmp.join(100);
} catch (Exception e) {
}
tmp = null;
}
mcast_receiver = null;
}
// 2. Stop the unicast receiver thread
if (ucast_receiver != null) {
ucast_receiver.stop();
ucast_receiver = null;
}
// 3. Stop the in_packet_handler thread
if (incoming_packet_handler != null) {
incoming_packet_handler.stop();
}
}
public void start(ContentHandler sax, Target target) throws IOException, SAXException {
this.target = target;
XMLReader parser;
try {
parser = spf.newSAXParser().getXMLReader();
} catch (ParserConfigurationException e) {
throw new LagoonException(e.getMessage());
}
parser.setContentHandler(sax);
parser.setEntityResolver(
new EntityResolver() {
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException {
InputSource is = new InputSource(getSourceMan().getFileURL(systemId));
File fil = getSourceMan().getFile(systemId);
if (fil != null) {
InputStream istr = new FileInputStream(fil);
is.setByteStream(istr);
}
return is;
}
});
exception = null;
mis = new MyInputStream();
mos = new MyOutputStream(mis);
thread = new Thread(this);
thread.start();
parser.parse(new InputSource(mis));
mis.close();
try {
thread.join(1000);
} catch (InterruptedException e) {
}
if (thread.isAlive()) {
thread.interrupt();
}
this.target = null;
if (exception != null) {
if (exception instanceof SAXException) {
throw (SAXException) exception;
} else if (exception instanceof IOException) {
throw (IOException) exception;
}
}
}
synchronized void start() {
if (queue.closed()) queue.reset();
if (thread == null || !thread.isAlive()) {
thread = getThreadFactory().newThread(this, "ViewHandler");
thread.setDaemon(
false); // thread cannot terminate if we have tasks left, e.g. when we as coord leave
thread.start();
}
}
public void start() {
if (streamReader != null && streamReader.isAlive()) {
System.out.println("Camera already started");
return;
}
streamReader = new Thread(this, "HTTP Stream reader");
keepAlive = true;
streamReader.start();
}
public void stop() {
Util.close(srv_sock);
if (acceptor != null && acceptor.isAlive()) acceptor.interrupt();
Util.sleep(500);
if (!sockets.isEmpty()) {
for (Socket sock : sockets) Util.close(sock);
}
}
public synchronized void handle(Socket socket) throws IOException {
con = new Connection(socket);
count = 0;
if (thread == null || !thread.isAlive()) {
thread = new Thread(runners, this);
thread.start();
} else {
notify();
}
}
public void stop() {
Thread tmp;
if (thread != null && thread.isAlive()) {
running = false;
tmp = thread;
thread = null;
closeSocket(); // this will cause the thread to break out of its loop
tmp.interrupt();
tmp = null;
}
thread = null;
}
public void stop() {
if (streamReader == null || !streamReader.isAlive()) {
System.out.println("Camera already stopped");
return;
}
keepAlive = false;
try {
streamReader.join();
} catch (InterruptedException e) {
System.err.println(e.getMessage());
}
}
public static void startChat(Socket socket) {
InputStream input;
DataInputStream dis = null;
OutputStream output;
DataOutputStream dos = null;
try {
input = socket.getInputStream();
dis = new DataInputStream(input);
output = socket.getOutputStream();
dos = new DataOutputStream(output);
dos.writeInt(3); // send 5 as request to server to request for chat
} catch (IOException e) {
System.out.println("Cannot send requests to server.");
}
System.out.println("Enter your message and hit enter to send.\n");
connectedToChat = true;
Thread readThread = new Thread(new Read(dis));
Thread writeThread = new Thread(new Write(dos));
readThread.start();
writeThread.start();
while ((writeThread.isAlive()) && (readThread.isAlive())) {}
System.out.println("Disconnected from chat. Enter anything to return to menu.");
if (!writeThread.isAlive()) {
Scanner scanner = new Scanner(System.in);
scanner.next();
}
while (writeThread.isAlive()) {}
}
public boolean runMacroTool(String name) {
for (int i = 0; i < nMacros; i++) {
if (macroNames[i].startsWith(name)) {
if (macroToolThread != null
&& macroToolThread.getName().indexOf(name) != -1
&& macroToolThread.isAlive())
return false; // do nothing if this tool is already running
MacroRunner mw = new MacroRunner(pgm, macroStarts[i], name, (String) null);
macroToolThread = mw.getThread();
// IJ.log("runMacroTool: "+macroToolThread);
return true;
}
}
return false;
}
private void startMessageSending() {
// if listener thread is alive and listening now, no need to recreate. Just reuse it.
if (messageSendingThread != null && messageSendingThread.isAlive()) {
return;
}
Runnable messageSendingAction =
() -> {
Scanner scanner = new Scanner(System.in);
while (connected) {
String message = scanner.nextLine();
sendMessage(message);
}
};
messageSendingThread = new Thread(messageSendingAction);
messageSendingThread.start();
}
private synchronized String getLinuxDMIInfo(String dmiType, String target) {
// only try to get dmidecode information once, after that, we can
// reuse the output
if (dmiInfo == null) {
Thread dmidecodeThread =
new Thread() {
public void run() {
dmiInfo = getCommandOutput("/usr/sbin/dmidecode");
}
};
dmidecodeThread.start();
try {
dmidecodeThread.join(2000);
if (dmidecodeThread.isAlive()) {
dmidecodeThread.interrupt();
dmiInfo = "";
}
} catch (InterruptedException ie) {
dmidecodeThread.interrupt();
}
}
if (dmiInfo.length() == 0) {
return "";
}
boolean dmiFlag = false;
for (String s : dmiInfo.split("\n")) {
String line = s.toLowerCase();
if (dmiFlag) {
if (line.contains(target)) {
String key = target + ":";
int indx = line.indexOf(key) + key.length();
if (line.contains(key) && indx < line.length()) {
return line.substring(indx).trim();
}
String[] ss = line.split(":");
return ss[ss.length - 1];
}
} else if (line.contains(dmiType)) {
dmiFlag = true;
}
}
return "";
}
/** compareAndSet in one thread enables another waiting for value to succeed */
public void testCompareAndSetInMultipleThreads() {
final AtomicLong ai = new AtomicLong(1);
Thread t =
new Thread(
new Runnable() {
public void run() {
while (!ai.compareAndSet(2, 3)) Thread.yield();
}
});
try {
t.start();
assertTrue(ai.compareAndSet(1, 2));
t.join(LONG_DELAY_MS);
assertFalse(t.isAlive());
assertEquals(ai.get(), 3);
} catch (Exception e) {
unexpectedException();
}
}
private void startBackgroundThread() {
if (updateAllInBackground == null || !updateAllInBackground.isAlive()) {
updateAllInBackground =
new Thread("UpdateAllThread") {
@Override
public void run() {
while (!isInterrupted()) {
try {
sleep(settings.getAutoupdateInterval() * 1000);
updateAll();
} catch (InterruptedException ex) {
return;
}
}
}
};
updateAllInBackground.start();
}
}
/** Starts the unicast and multicast receiver threads */
void startThreads() throws Exception {
if (ucast_receiver == null) {
// start the listener thread of the ucast_recv_sock
ucast_receiver = new UcastReceiver();
ucast_receiver.start();
if (Trace.trace) {
Trace.info("UDP.startThreads()", "created unicast receiver thread");
}
}
if (ip_mcast) {
if (mcast_receiver != null) {
if (mcast_receiver.isAlive()) {
if (Trace.trace) {
Trace.info(
"UDP.createThreads()",
"did not create new multicastreceiver thread as existing "
+ "multicast receiver thread is still running");
}
} else {
mcast_receiver = null; // will be created just below...
}
}
if (mcast_receiver == null) {
mcast_receiver = new Thread(this, "UDP mcast receiver");
mcast_receiver.setPriority(Thread.MAX_PRIORITY); // needed ????
mcast_receiver.setDaemon(true);
mcast_receiver.start();
}
}
if (use_outgoing_packet_handler) {
outgoing_packet_handler.start();
}
if (use_incoming_packet_handler) {
incoming_packet_handler.start();
}
}
private void runCpu() {
if (cpuThread != null && cpuThread.isAlive()) return;
runButton.setEnabled(false);
execButton.setEnabled(false);
stepButton.setEnabled(false);
pauseButton.setEnabled(true);
cpuThread =
new Thread(
new Runnable() {
public void run() {
debugger.run();
// on halt
runButton.setEnabled(true);
execButton.setEnabled(true);
stepButton.setEnabled(true);
pauseButton.setEnabled(false);
registersModel.fireUpdate();
memoryModel.fireUpdate(0, RAM_SIZE - 1); // TODO optimize
}
},
"CpuThread");
cpuThread.setDaemon(true);
cpuThread.start();
}
public boolean isAlive() {
return streamReader.isAlive();
}
/**
* Returns true if the server is ready to accept new clients.
*
* @return true if the server is listening.
*/
public final boolean isListening() {
return connectionListener != null && connectionListener.isAlive(); // modified in version 2.31
}
public final boolean isAlive() {
return wasStarted() && !myServerSocket.isClosed() && myThread.isAlive();
}
public boolean isAlive() {
return thread.isAlive();
}
/**
* Try to update an old block to a new block. If there are ongoing create threads running for the
* old block, the threads will be returned without updating the block.
*
* @return ongoing create threads if there is any. Otherwise, return null.
*/
private synchronized List<Thread> tryUpdateBlock(Block oldblock, Block newblock)
throws IOException {
// check ongoing create threads
final ActiveFile activefile = ongoingCreates.get(oldblock);
if (activefile != null && !activefile.threads.isEmpty()) {
// remove dead threads
for (Iterator<Thread> i = activefile.threads.iterator(); i.hasNext(); ) {
final Thread t = i.next();
if (!t.isAlive()) {
i.remove();
}
}
// return living threads
if (!activefile.threads.isEmpty()) {
return new ArrayList<Thread>(activefile.threads);
}
}
// No ongoing create threads is alive. Update block.
File blockFile = findBlockFile(oldblock.getBlockId());
if (blockFile == null) {
throw new IOException("Block " + oldblock + " does not exist.");
}
File oldMetaFile = findMetaFile(blockFile);
long oldgs = parseGenerationStamp(blockFile, oldMetaFile);
// rename meta file to a tmp file
File tmpMetaFile =
new File(
oldMetaFile.getParent(),
oldMetaFile.getName() + "_tmp" + newblock.getGenerationStamp());
if (!oldMetaFile.renameTo(tmpMetaFile)) {
throw new IOException("Cannot rename block meta file to " + tmpMetaFile);
}
// update generation stamp
if (oldgs > newblock.getGenerationStamp()) {
throw new IOException(
"Cannot update block (id="
+ newblock.getBlockId()
+ ") generation stamp from "
+ oldgs
+ " to "
+ newblock.getGenerationStamp());
}
// update length
if (newblock.getNumBytes() > oldblock.getNumBytes()) {
throw new IOException(
"Cannot update block file (="
+ blockFile
+ ") length from "
+ oldblock.getNumBytes()
+ " to "
+ newblock.getNumBytes());
}
if (newblock.getNumBytes() < oldblock.getNumBytes()) {
truncateBlock(blockFile, tmpMetaFile, oldblock.getNumBytes(), newblock.getNumBytes());
}
// rename the tmp file to the new meta file (with new generation stamp)
File newMetaFile = getMetaFile(blockFile, newblock);
if (!tmpMetaFile.renameTo(newMetaFile)) {
throw new IOException("Cannot rename tmp meta file to " + newMetaFile);
}
updateBlockMap(ongoingCreates, oldblock, newblock);
updateBlockMap(volumeMap, oldblock, newblock);
// paranoia! verify that the contents of the stored block
// matches the block file on disk.
validateBlockMetadata(newblock);
return null;
}
private void checkTransferThread() {
if (transferThread != null && transferThread.isAlive() || isDone()) {
throw new IllegalStateException("File transfer in progress or has already completed.");
}
}
public void stop() {
if (relaxer.isAlive()) {
relaxer.stop();
}
relaxer = null;
}
public static void testMiddleware() {
rdfStream = new ByteArrayOutputStream();
Thread rdfThread =
new Thread() {
public void run() {
File buildFile = new File("../rdfUtils/build.xml");
Project project = new Project();
project.setUserProperty("ant.file", buildFile.getAbsolutePath());
PrintStream ps = new PrintStream(rdfStream);
try {
project.fireBuildStarted();
DefaultLogger consoleLogger = new DefaultLogger();
consoleLogger.setErrorPrintStream(System.err);
consoleLogger.setOutputPrintStream(ps);
consoleLogger.setMessageOutputLevel(Project.MSG_INFO);
project.addBuildListener(consoleLogger);
project.init();
ProjectHelper projectHelper = ProjectHelper.getProjectHelper();
project.addReference("ant.projectHelper", projectHelper);
projectHelper.parse(project, buildFile);
project.executeTarget("run-rdfTest-nointeract");
project.fireBuildFinished(null);
} catch (Exception e) {
System.out.println(e);
}
}
};
rdfThread.start();
System.out.println("RDF Module should be running, starting tests..");
try {
long endTime = testStartTime + maxTestRunDuration;
System.out.println("Started at " + testStartTime + " and running until " + endTime);
while ((endTime > System.currentTimeMillis()) && rdfThread.isAlive()) {
if (rdfStream.size() > 0) {
String latestString = rdfStream.toString("UTF8");
System.out.println(latestString);
if (latestString.contains("TestRDF Rate")) {
String[] splited = latestString.split("\\s+");
RDFSent = Integer.parseInt(splited[8]);
RDFRec = Integer.parseInt(splited[11]);
System.out.println("RDF sent " + RDFSent + " and rec " + RDFRec);
if (RDFSent > 1000) {
// System.out.println("RDF min send/rec rate test passed");
RDFCheck = true;
}
} else if (latestString.contains("TestRDF Loss")) {
String[] splited = latestString.split("\\s+");
RDFLossSent = Integer.parseInt(splited[7]);
RDFLossRec = Integer.parseInt(splited[10]);
System.out.println("RDFLoss sent " + RDFLossSent + " and rec " + RDFLossRec);
rdfLossResult = splited[12];
System.out.println("overall loss result " + rdfLossResult);
if (rdfLossResult.equals("OK")) {
RDFLossCheck = true;
// System.out.println("RDF packet loss test passed");
}
}
rdfStream.reset();
}
}
System.out.println("ending test" + endS);
if (rdfThread.isAlive()) {
rdfThread.interrupt();
}
} catch (Exception e) {
System.out.println(e);
}
try {
if (RDFCheck) {
testResults.write(
"<testcase classname=\"RDF\" name=\"Sent\" status=\"" + RDFSent + "\"/>" + endS);
testResults.write(
"<testcase classname=\"RDF\" name=\"Received\" status=\"" + RDFRec + "\"/>" + endS);
} else {
testResults.write("<testcase classname=\"RDF\" name=\"Sent\">" + endS);
testResults.write(
" <failure type=\"Middleware Performanace, sent\"> " + RDFSent + " </failure>" + endS);
testResults.write("</testcase>" + endS);
testResults.write("<testcase classname=\"RDF\" name=\"Received\">" + endS);
testResults.write(
" <failure type=\"Middleware Performanace, received\"> "
+ RDFRec
+ " </failure>"
+ endS);
testResults.write("</testcase>" + endS);
}
if (RDFLossCheck) {
testResults.write(
"<testcase classname=\"RDF\" name=\"Loss\" status=\""
+ (RDFLossSent - RDFLossRec)
+ "\"/>"
+ endS);
} else {
testResults.write("<testcase classname=\"RDF\" name=\"Loss\">" + endS);
testResults.write(
" <failure type=\"Message loss \"> "
+ (RDFLossSent - RDFLossRec)
+ " </failure>"
+ endS);
testResults.write("</testcase>" + endS);
}
} catch (Exception e) {
System.out.println("error writing to file");
}
}
public void setLocationListener(
LocationListener listener, int interval, int timeout, int maxAge) {
// * Stop all previous listener threads *
listenerRunning = false;
if (listyThread != null) {
while (listyThread.isAlive()) {
Thread.yield();
} // End old thread
listyThread = null; // Discard the listener thread instance
}
// * Remove any listeners from GPSListener *
if (listener == null) {
// Remove current listener from SimpleGPS
SimpleGPS.removeListener(gpsl);
gpsl = null;
return; // No listener provided, so return now so it dosn't make a new one
}
// * Inner classes need final variables *
final int to = timeout;
final LocationListener l = listener;
final LocationProvider lp = this;
final int delay = interval * 1000; // Oddly interval is in seconds, and not float
// Make new thread here and start it if interval > 0, else if -1
// then use the GPSListener interface.
if (interval > 0) { // Notify according to interval by user
listyThread =
new Thread() {
public void run() {
while (listenerRunning) {
try {
// TODO: Probably only notify if location changed? Need to compare to old.
// TODO: Make helper method since this is used below too.
l.locationUpdated(lp, lp.getLocation(to));
Thread.sleep(delay);
} catch (LocationException e) {
// TODO Auto-generated catch block
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
}
}
};
listyThread.setDaemon(true); // so JVM exits if thread is still running
listenerRunning = true;
listyThread.start();
} else if (interval < 0) { // If interval is -1, use default update interval
// In our case, update as soon as new coordinates are available from GPS (via GPSListener)
// TODO: Alternate method: Use GPSListener for ProximityListener and this.
gpsl =
new GPSListener() {
public void sentenceReceived(NMEASentence sen) {
// Check if GGASentence. Means that new location info is ready
if (sen.getHeader().equals(GGASentence.HEADER)) {
try {
// TODO: Probably only notify if location changed? Need to compare to old.
l.locationUpdated(lp, lp.getLocation(to));
} catch (LocationException e) {
// TODO Auto-generated catch block
} catch (InterruptedException e) {
// TODO Auto-generated catch block
}
}
}
};
SimpleGPS.addListener(gpsl);
}
// TODO: Need to implement LocationListener.providerStateChanged()
}
