GarbageCollector


1   /*
2    * All content copyright (c) 2003-2006 Terracotta, Inc., except as may otherwise be noted in a separate copyright notice.  All rights reserved.
3    */
4   package com.tc.objectserver.core.api;
5   
6   import com.tc.object.ObjectID;
7   import com.tc.objectserver.api.GCStats;
8   import com.tc.objectserver.api.ObjectManagerEventListener;
9   import com.tc.text.PrettyPrintable;
10  import com.tc.util.concurrent.LifeCycleState;
11  import com.tc.util.concurrent.StoppableThread;
12  
13  import java.util.Collection  ;
14  import java.util.Set  ;
15  
16  public interface GarbageCollector extends PrettyPrintable {
17  
18    public boolean isPausingOrPaused();
19  
20    public boolean isPaused();
21  
22    /**
23     * Called by object manager. Notifies the garbage collector that it's ok to perform GC.
24     */
25    public void notifyReadyToGC();
26  
27    /*
28     * Request to pause when the system state stabalizes
29     */
30    public void requestGCPause();
31  
32    /**
33     * Called by the GC thread. Notifies the garbage collector that TC is complete.
34     */
35    public void notifyGCComplete();
36  
37    /**
38     * @param traverser Determines whether or not to traverse a given tree node.
39     * @param roots
40     * @param managedObjects
41     * @return An set on the objects that can be deleted
42     */
43    public Set   collect(Filter traverser, Collection   roots, Set   managedObjectIds);
44  
45    public Set   collect(Filter traverser, Collection   roots, Set   managedObjectIds, LifeCycleState state);
46  
47    public void changed(ObjectID changedObject, ObjectID oldReference, ObjectID newReference);
48  
49    public void gc();
50  
51    public void addNewReferencesTo(Set   rescueIds);
52  
53    public void start();
54  
55    public void stop();
56  
57    public void setState(StoppableThread st);
58  
59    public void addListener(ObjectManagerEventListener listener);
60  
61    public GCStats[] getGarbageCollectorStats();
62  }
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