import java.lang.Integer;
import java.io.IOException;
import java.io.BufferedOutputStream;
+import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.DataInputStream;
+import java.io.FileReader;
+import java.io.FileNotFoundException;
import java.net.*;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
import java.util.List;
+import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Logger;
+import java.util.Collections;
class USTRegisterMsg {
public static int pid;
new LTTngSessiondCmd2_4.sessiond_hdr();
private final String sessiondHost;
- private final int sessiondPort;
private Socket sessiondSock;
private boolean quit = false;
private Semaphore registerSem;
private Timer eventTimer;
- private List<LTTngEvent> enabledEventList = new ArrayList<LTTngEvent>();
+ private Set<LTTngEvent> enabledEventSet =
+ Collections.synchronizedSet(new HashSet<LTTngEvent>());
/*
* Map of Logger objects that have been enabled. They are indexed by name.
*/
private final static long timerDelay = 5 * 1000;
private static boolean timerInitialized;
- public LTTngTCPSessiondClient(String host, int port, Semaphore sem) {
+ private static final String rootPortFile = "/var/run/lttng/jul.port";
+ private static final String userPortFile = "/.lttng/jul.port";
+
+ /* Indicate if we've already release the semaphore. */
+ private boolean sem_posted = false;
+
+ public LTTngTCPSessiondClient(String host, Semaphore sem) {
this.sessiondHost = host;
- this.sessiondPort = port;
this.registerSem = sem;
this.eventTimer = new Timer();
this.timerInitialized = false;
this.eventTimer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
- /*
- * We have to make a copy here since it is possible that the
- * enabled event list is changed during an iteration on it.
- */
- List<LTTngEvent> tmpList = new ArrayList<LTTngEvent>(enabledEventList);
-
- LTTngSessiondCmd2_4.sessiond_enable_handler enableCmd = new
- LTTngSessiondCmd2_4.sessiond_enable_handler();
- for (LTTngEvent event: tmpList) {
- int ret;
- Logger logger;
-
+ synchronized (enabledEventSet) {
+ LTTngSessiondCmd2_4.sessiond_enable_handler enableCmd = new
+ LTTngSessiondCmd2_4.sessiond_enable_handler();
/*
- * Check if this Logger name has been enabled already. Note
- * that in the case of "*", it's never added in that hash
- * table thus the enable command does a lookup for each
- * logger name in that hash table for the * case in order
- * to make sure we don't enable twice the same logger
- * because JUL apparently accepts that the *same*
- * LogHandler can be added twice on a Logger object...
- * don't ask...
+ * Modifying events in a Set will raise a
+ * ConcurrentModificationException. Thus, we remove an event
+ * and add its modified version to modifiedEvents when a
+ * modification is necessary.
*/
- logger = enabledLoggers.get(event.name);
- if (logger != null) {
- continue;
- }
+ Set<LTTngEvent> modifiedEvents = new HashSet<LTTngEvent>();
+ Iterator<LTTngEvent> it = enabledEventSet.iterator();
- /*
- * Set to one means that the enable all event has been seen
- * thus event from that point on must use loglevel for all
- * events. Else the object has its own loglevel.
- */
- if (handler.logLevelUseAll == 1) {
- event.logLevel.level = handler.logLevelAll;
- event.logLevel.type = handler.logLevelTypeAll;
- }
+ while (it.hasNext()) {
+ int ret;
+ Logger logger;
+ LTTngEvent event = it.next();
- /*
- * The all event is a special case since we have to iterate
- * over every Logger to see which one was not enabled.
- */
- if (event.name.equals("*")) {
- enableCmd.name = event.name;
- enableCmd.lttngLogLevel = event.logLevel.level;
- enableCmd.lttngLogLevelType = event.logLevel.type;
/*
- * The return value is irrelevant since the * event is
- * always kept in the list.
+ * Check if this Logger name has been enabled already. Note
+ * that in the case of "*", it's never added in that hash
+ * table thus the enable command does a lookup for each
+ * logger name in that hash table for the * case in order
+ * to make sure we don't enable twice the same logger
+ * because JUL apparently accepts that the *same*
+ * LogHandler can be added twice on a Logger object...
+ * don't ask...
*/
- enableCmd.execute(handler, enabledLoggers);
- continue;
- }
+ logger = enabledLoggers.get(event.name);
+ if (logger != null) {
+ continue;
+ }
- ret = enableCmd.enableLogger(handler, event, enabledLoggers);
- if (ret == 1) {
- /* Enabled so remove the event from the list. */
- enabledEventList.remove(event);
+ /*
+ * Set to one means that the enable all event has been seen
+ * thus event from that point on must use loglevel for all
+ * events. Else the object has its own loglevel.
+ */
+ if (handler.logLevelUseAll == 1) {
+ it.remove();
+ event.logLevels.addAll(handler.logLevelsAll);
+ modifiedEvents.add(event);
+ }
+
+ /*
+ * The all event is a special case since we have to iterate
+ * over every Logger to see which one was not enabled.
+ */
+ if (event.name.equals("*")) {
+ enableCmd.name = event.name;
+ /* Tell the command NOT to add the loglevel. */
+ enableCmd.lttngLogLevel = -1;
+ /*
+ * The return value is irrelevant since the * event is
+ * always kept in the set.
+ */
+ enableCmd.execute(handler, enabledLoggers);
+ continue;
+ }
+
+ ret = enableCmd.enableLogger(handler, event, enabledLoggers);
+ if (ret == 1) {
+ /* Enabled so remove the event from the set. */
+ if (!modifiedEvents.remove(event)) {
+ /*
+ * event can only be present in one of
+ * the sets.
+ */
+ it.remove();
+ }
+ }
}
+ enabledEventSet.addAll(modifiedEvents);
}
+
}
}, this.timerDelay, this.timerDelay);
this.timerInitialized = true;
}
+ /*
+ * Try to release the registerSem if it's not already done.
+ */
+ private void tryReleaseSem()
+ {
+ /* Release semaphore so we unblock the agent. */
+ if (!this.sem_posted) {
+ this.registerSem.release();
+ this.sem_posted = true;
+ }
+ }
+
public void init(LTTngLogHandler handler) throws InterruptedException {
this.handler = handler;
* UST application.
*/
registerToSessiond();
- this.registerSem.release();
setupEventTimer();
*/
handleSessiondCmd();
} catch (UnknownHostException uhe) {
- this.registerSem.release();
+ tryReleaseSem();
System.out.println(uhe);
} catch (IOException ioe) {
- this.registerSem.release();
+ tryReleaseSem();
Thread.sleep(3000);
} catch (Exception e) {
- this.registerSem.release();
+ tryReleaseSem();
e.printStackTrace();
}
}
}
switch (headerCmd.cmd) {
+ case CMD_REG_DONE:
+ {
+ /*
+ * Release semaphore so meaning registration is done and we
+ * can proceed to continue tracing.
+ */
+ tryReleaseSem();
+ /*
+ * We don't send any reply to the registration done command.
+ * This just marks the end of the initial session setup.
+ */
+ continue;
+ }
case CMD_LIST:
{
LTTngSessiondCmd2_4.sessiond_list_logger listLoggerCmd =
event = enableCmd.execute(this.handler, this.enabledLoggers);
if (event != null) {
/*
- * Add the event to the list so it can be enabled if
+ * Add the event to the set so it can be enabled if
* the logger appears at some point in time.
*/
- if (enabledEventList.contains(event) == false) {
- enabledEventList.add(event);
- }
+ enabledEventSet.add(event);
}
data = enableCmd.getBytes();
break;
}
}
+ private String getHomePath() {
+ return System.getProperty("user.home");
+ }
+
+ /**
+ * Read port number from file created by the session daemon.
+ *
+ * @return port value if found else 0.
+ */
+ private int getPortFromFile(String path) throws IOException {
+ int port;
+ BufferedReader br;
+
+ try {
+ br = new BufferedReader(new FileReader(path));
+ String line = br.readLine();
+ port = Integer.parseInt(line, 10);
+ if (port < 0 || port > 65535) {
+ /* Invalid value. Ignore. */
+ port = 0;
+ }
+ br.close();
+ } catch (FileNotFoundException e) {
+ /* No port available. */
+ port = 0;
+ }
+
+ return port;
+ }
+
private void connectToSessiond() throws Exception {
- this.sessiondSock = new Socket(this.sessiondHost, this.sessiondPort);
+ int port;
+
+ if (this.handler.is_root == 1) {
+ port = getPortFromFile(rootPortFile);
+ if (port == 0) {
+ /* No session daemon available. Stop and retry later. */
+ throw new IOException();
+ }
+ } else {
+ port = getPortFromFile(getHomePath() + userPortFile);
+ if (port == 0) {
+ /* No session daemon available. Stop and retry later. */
+ throw new IOException();
+ }
+ }
+
+ this.sessiondSock = new Socket(this.sessiondHost, port);
this.inFromSessiond = new DataInputStream(
sessiondSock.getInputStream());
this.outToSessiond = new DataOutputStream(
projects / lttng-ust.git / blobdiff