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fixed potential memory leak when motes are removed during a simulation

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This commit is contained in:
fros4943 2009-10-28 15:34:34 +00:00
parent 51130cea80
commit a4226e14c5
1 changed files with 39 additions and 48 deletions
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87
tools/cooja/java/se/sics/cooja/plugins/LogScriptEngine.java
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: LogScriptEngine.java,v 1.20 2009/10/27 10:12:00 fros4943 Exp $
* $Id: LogScriptEngine.java,v 1.21 2009/10/28 15:34:34 fros4943 Exp $
*/
package se.sics.cooja.plugins;
@ -48,6 +48,7 @@ import se.sics.cooja.GUI;
import se.sics.cooja.Mote;
import se.sics.cooja.Simulation;
import se.sics.cooja.TimeEvent;
import se.sics.cooja.SimEventCentral.MoteCountListener;
/**
* Loads and executes a Contiki test script.
@ -64,8 +65,32 @@ public class LogScriptEngine {
private ScriptEngine engine =
new ScriptEngineManager().getEngineByName("JavaScript");
private Observer logObserver = null; /* Detect mote log output */
private Observer simObserver = null; /* Detect added/removed motes */
/* Log observer: watches all log interfaces */
private Observer logObserver = new Observer() {
public void update(Observable obs, Object obj) {
Mote mote = (Mote) obj;
handleNewMoteOutput(
mote,
mote.getID(),
mote.getSimulation().getSimulationTime(),
mote.getInterfaces().getLog().getLastLogMessage()
);
}
};
/* Mote count observer: keeps track of newly added nodes */
private MoteCountListener newMotesListener = new MoteCountListener() {
public void moteWasAdded(Mote mote) {
if (mote.getInterfaces().getLog() != null) {
mote.getInterfaces().getLog().addObserver(logObserver);
}
}
public void moteWasRemoved(Mote mote) {
if (mote.getInterfaces().getLog() != null) {
mote.getInterfaces().getLog().deleteObserver(logObserver);
}
}
};
private Semaphore semaphoreScript = null; /* Semaphores blocking script/simulation */
private Semaphore semaphoreSim = null;
@ -114,26 +139,6 @@ public class LogScriptEngine {
public LogScriptEngine(Simulation simulation) {
this.simulation = simulation;
/* Create simulation observer: keeps track of newly added nodes */
simObserver = new Observer() {
public void update(Observable obs, Object obj) {
registerLogObserver();
}
};
/* Create log observer: watches all log interfaces */
logObserver = new Observer() {
public void update(Observable obs, Object obj) {
Mote mote = (Mote) obj;
handleNewMoteOutput(
mote,
mote.getID(),
mote.getSimulation().getSimulationTime(),
mote.getInterfaces().getLog().getLastLogMessage()
);
}
};
}
/* Only called from the simulation loop */
@ -160,7 +165,9 @@ public class LogScriptEngine {
e.getMessage(),
e, false);
}
unregisterLogObserver();
for (Mote m: simulation.getMotes()) {
newMotesListener.moteWasRemoved(m);
}
simulation.stopSimulation();
}
}
@ -189,24 +196,6 @@ public class LogScriptEngine {
scriptLogObserver = observer;
}
private void unregisterLogObserver() {
/* Unregister mote log observer */
for (Mote mote: simulation.getMotes()) {
if (mote.getInterfaces().getLog() != null) {
mote.getInterfaces().getLog().deleteObserver(logObserver);
}
}
}
private void registerLogObserver() {
/* Register mote log observer */
for (Mote mote: simulation.getMotes()) {
if (mote.getInterfaces().getLog() != null) {
mote.getInterfaces().getLog().addObserver(logObserver);
}
}
}
/**
* Deactivate script
*/
@ -228,9 +217,10 @@ public class LogScriptEngine {
timeoutEvent.remove();
simulation.deleteObserver(simObserver);
unregisterLogObserver();
simulation.getEventCentral().removeMoteCountListener(newMotesListener);
for (Mote mote: simulation.getMotes()) {
newMotesListener.moteWasRemoved(mote);
}
engine.put("SHUTDOWN", true);
@ -359,7 +349,10 @@ public class LogScriptEngine {
}
/* Setup simulation observers */
simulation.addObserver(simObserver);
simulation.getEventCentral().addMoteCountListener(newMotesListener);
for (Mote mote: simulation.getMotes()) {
newMotesListener.moteWasAdded(mote);
}
/* Create script output logger */
engine.put("log", new ScriptLog() {
@ -436,8 +429,6 @@ public class LogScriptEngine {
scriptMote = new ScriptMote();
engine.put("node", scriptMote);
registerLogObserver();
}
private TimeEvent timeoutEvent = new TimeEvent(0) {