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synchronization of access tracker to avoid java-internal loop in TreeMap during shutdown

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see http://forum.yacy-websuche.de/viewtopic.php?p=1178#p1178

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4017 6c8d7289-2bf4-0310-a012-ef5d649a1542
This commit is contained in:
orbiter
2007-07-31 10:42:11 +00:00
parent beb2e062a7
commit 757703a938
1 changed files with 19 additions and 16 deletions

35
source/de/anomic/server/serverAbstractSwitch.java

@ -174,12 +174,14 @@ public abstract class serverAbstractSwitch implements serverSwitch {
if (accessPath == null) accessPath="NULL";
TreeMap access = (TreeMap) accessTracker.get(host);
if (access == null) access = new TreeMap();
access.put(new Long(System.currentTimeMillis()), accessPath);
synchronized (access) {
access.put(new Long(System.currentTimeMillis()), accessPath);
// write back to tracker
try {
accessTracker.put(host, clearTooOldAccess(access));
} catch (ConcurrentModificationException e) {};
// write back to tracker
try {
accessTracker.put(host, clearTooOldAccess(access));
} catch (ConcurrentModificationException e) {};
}
}
public TreeMap accessTrack(String host) {
@ -187,19 +189,20 @@ public abstract class serverAbstractSwitch implements serverSwitch {
TreeMap access = (TreeMap) accessTracker.get(host);
if (access == null) return null;
// clear too old entries
int oldsize = access.size();
if ((access = clearTooOldAccess(access)).size() != oldsize) {
// write back to tracker
if (access.size() == 0) {
accessTracker.remove(host);
} else {
accessTracker.put(host, access);
synchronized (access) {
// clear too old entries
int oldsize = access.size();
if ((access = clearTooOldAccess(access)).size() != oldsize) {
// write back to tracker
if (access.size() == 0) {
accessTracker.remove(host);
} else {
accessTracker.put(host, access);
}
}
}
return access;
return access;
}
}
private TreeMap clearTooOldAccess(TreeMap access) {