com.github.andy2003.logging.snapshots.SnapshotBuffer Maven / Gradle / Ivy
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/**
* This file is part of Kayak.
*
* Kayak is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Kayak is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Kayak. If not, see
*
*/
public class SnapshotBuffer {
private static final Logger logger = Logger.getLogger(SnapshotBuffer.class.getCanonicalName());
private static final Calendar cal = Calendar.getInstance();
private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd-hh-mm-ss");
private static final int depth = Options.getSnapshotBufferDepth();
private final Set frames = new TreeSet(new Frame.TimestampComparator());
private Thread cleanupThread;
private int stopTimeout = 0;
private boolean stopRequest = false;
private final Map subscriptions = Collections.synchronizedMap(new HashMap());
private Project currentProject;
private boolean isBuffering = false;
private ProjectManagementListener managementListener = new ProjectManagementListener() {
@Override
public void projectsUpdated() {
}
@Override
public void openProjectChanged(Project p) {
logger.log(Level.INFO, "Switching snapshot buffer to new project");
if (currentProject != null) {
currentProject.removeProjectChangeListener(projectListener);
}
currentProject = p;
for (Bus b : currentProject.getBusses()) {
connectBus(b);
}
currentProject.addProjectChangeListener(projectListener);
}
};
private ProjectChangeListener projectListener = new ProjectChangeListener() {
@Override
public void projectNameChanged(Project p, String name) {
}
@Override
public void projectClosed(Project p) {
currentProject.removeProjectChangeListener(projectListener);
synchronized (subscriptions) {
Set busses = subscriptions.keySet();
for (Subscription s : subscriptions.values()) {
s.Terminate();
}
subscriptions.clear();
}
}
@Override
public void projectOpened(Project p) {
}
@Override
public void projectBusAdded(Project p, Bus bus) {
connectBus(bus);
}
@Override
public void projectBusRemoved(Project p, Bus bus) {
synchronized (subscriptions) {
Subscription s = subscriptions.get(bus);
if (s != null) {
s.Terminate();
}
subscriptions.remove(bus);
}
}
};
public boolean isBuffering() {
return isBuffering;
}
private FrameListener receiver = new FrameListener() {
@Override
public void newFrame(Frame frame) {
synchronized(frames) {
frames.add(frame);
}
}
};
private Runnable cleanupRunnable = new Runnable() {
private TimeSource ts = TimeSourceManager.getGlobalTimeSource();
@Override
public void run() {
while (!stopRequest) {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
if (stopRequest) {
break;
} else {
logger.log(Level.WARNING, "Snapshot buffer interrupted without stop request");
}
}
long currentTime = ts.getTime();
Frame[] frameArray = new Frame[frames.size()];
synchronized(frames) {
frameArray = frames.toArray(frameArray);
for (Frame f : frameArray) {
if ((f.getTimestamp()/1000) < (currentTime - depth)) {
frames.remove(f);
} else { /* set is ordered so we can stop here */
break;
}
}
}
}
cleanup();
}
private void cleanup() {
try {
Thread.sleep(stopTimeout);
} catch (InterruptedException ex) {
logger.log(Level.INFO, "Snapshot buffer interrupted while waiting.", ex);
}
return;
}
};
public int getDepth() {
return depth;
}
public SnapshotBuffer() {
ProjectManager.getGlobalProjectManager().addListener(managementListener);
currentProject = ProjectManager.getGlobalProjectManager().getOpenedProject();
if (currentProject != null) {
for (Bus b : currentProject.getBusses()) {
connectBus(b);
}
currentProject.addProjectChangeListener(projectListener);
}
logger.log(Level.INFO, "New snapshot buffer was connected");
}
private void connectBus(Bus bus) {
Subscription s = subscriptions.get(bus);
if (s == null) {
Subscription sn = new Subscription(receiver, bus);
subscriptions.put(bus, sn);
logger.log(Level.INFO, "Connected bus" + bus.getName());
}
}
/**
* Connect the buffer to a bus to receive frames. This is done through
* a RAW subscription that is added to the bus.
* @param bus The bus to receive Frames from
*/
public void startBuffering() {
frames.clear();
for (Subscription s : subscriptions.values()) {
s.setSubscribeAll(true);
}
stopRequest = false;
cleanupThread = new Thread(cleanupRunnable);
cleanupThread.setName("Snapshot buffer thread");
cleanupThread.start();
isBuffering = true;
}
/**
* Stop buffering from the bus. No more frames will be added. The
* connection to the bus is terminated.
*/
public void stopBuffering(int ms) {
stopTimeout = ms;
stopRequest = true;
if (cleanupThread != null && cleanupThread.isAlive()) {
try {
cleanupThread.join();
} catch (InterruptedException ex) {
logger.log(Level.SEVERE, "was not able to stop cleanup thread!", ex);
}
}
for (Subscription s : subscriptions.values()) {
s.Terminate();
}
isBuffering = false;
}
public void writeToFile() {
String fileName = "Snapshot_" + sdf.format(cal.getTime()) + ".log";
FileObject logFolder = FileUtil.toFileObject(new File(Options.getLogFilesFolder()));
OutputStream os = null;
try {
FileObject fo = logFolder.createData(fileName);
os = fo.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter out = new BufferedWriter(osw);
out.write("PLATFORM SNAPSHOTS\n");
out.write("DESCRIPTION \"Snapshot of project " + currentProject.getName() + "\"\n");
Set busses = subscriptions.keySet();
for (Bus bus : busses) {
if(bus.getAlias() != null && !bus.getAlias().equals(""))
out.write("DEVICE_ALIAS " + bus.getAlias() + " " + bus.getName() + "\n");
else
out.write("DEVICE_ALIAS " + bus.getName() + " " + bus.getName() + "\n");
}
for (Frame frame : frames) {
out.write(frame.toLogFileNotation());
}
out.close();
} catch (IOException ex) {
Exceptions.printStackTrace(ex);
} finally {
try {
if(os != null)
os.close();
} catch (IOException ex) {
Exceptions.printStackTrace(ex);
}
}
}
}
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