@SuppressWarnings("unchecked")
private void garbageCollectIdentities() {
final MessageManager messageManager = mFreetalk.getMessageManager();
final PersistentTaskManager taskManager = mFreetalk.getTaskManager();
synchronized (this) {
if (mIdentityFetchInProgress
|| mOwnIdentityFetchInProgress
|| mLastIdentityFetchTime == 0
|| mLastOwnIdentityFetchTime == 0) return;
/* Executing the thread loop once will always take longer than THREAD_PERIOD. Therefore, if we set the limit to 3*THREAD_PERIOD,
* it will hit identities which were last received before more than 2*THREAD_LOOP, not exactly 3*THREAD_LOOP. */
long lastAcceptTime =
Math.min(mLastIdentityFetchTime, mLastOwnIdentityFetchTime) - GARBAGE_COLLECT_DELAY;
lastAcceptTime =
Math.max(
lastAcceptTime,
0); // This is not really needed but a time less than 0 does not make sense.;
Query q = db.query();
q.constrain(WoTIdentity.class);
q.descend("mLastReceivedFromWoT").constrain(lastAcceptTime).smaller();
ObjectSet<WoTIdentity> result = q.execute();
for (WoTIdentity identity : result) {
identity.initializeTransient(mFreetalk);
Logger.debug(this, "Garbage collecting identity " + identity);
deleteIdentity(identity, messageManager, taskManager);
}
if (mShortestUniqueNicknameCacheNeedsUpdate) updateShortestUniqueNicknameCache();
}
}
/**
* Checks for duplicate identity objects and deletes duplicates if they exist. I have absolutely
* NO idea why Bombe does happen to have a duplicate identity, I see no code path which could
* cause this. TODO: Get rid of this function if nobody reports a duplicate for some time - the
* function was added at 2011-01-10
*/
private synchronized void deleteDuplicateIdentities() {
WoTMessageManager messageManager = mFreetalk.getMessageManager();
PersistentTaskManager taskManager = mFreetalk.getTaskManager();
synchronized (messageManager) {
synchronized (taskManager) {
synchronized (db.lock()) {
try {
HashSet<String> deleted = new HashSet<String>();
Logger.normal(this, "Searching for duplicate identities ...");
for (WoTIdentity identity : getAllIdentities()) {
Query q = db.query();
q.constrain(WoTIdentity.class);
q.descend("mID").constrain(identity.getID());
q.constrain(identity).identity().not();
ObjectSet<WoTIdentity> duplicates =
new Persistent.InitializingObjectSet<WoTIdentity>(mFreetalk, q);
for (WoTIdentity duplicate : duplicates) {
if (deleted.contains(duplicate.getID()) == false) {
Logger.error(
duplicate, "Deleting duplicate identity " + duplicate.getRequestURI());
deleteIdentity(duplicate, messageManager, taskManager);
}
}
deleted.add(identity.getID());
}
Persistent.checkedCommit(db, this);
Logger.normal(this, "Finished searching for duplicate identities.");
} catch (RuntimeException e) {
Persistent.checkedRollback(db, this, e);
}
}
}
}
}
@SuppressWarnings("unchecked")
private void parseIdentities(SimpleFieldSet params, boolean bOwnIdentities) {
if (bOwnIdentities) Logger.normal(this, "Parsing received own identities...");
else Logger.normal(this, "Parsing received identities...");
int idx;
int ignoredCount = 0;
int newCount = 0;
for (idx = 0; ; idx++) {
String identityID = params.get("Identity" + idx);
if (identityID == null
|| identityID.equals("")) /* TODO: Figure out whether the second condition is necessary */
break;
String requestURI = params.get("RequestURI" + idx);
String insertURI = bOwnIdentities ? params.get("InsertURI" + idx) : null;
String nickname = params.get("Nickname" + idx);
if (nickname == null || nickname.length() == 0) {
// If an identity publishes an invalid nickname in one of its first WoT inserts then WoT
// will return an empty
// nickname for that identity until a new XML was published with a valid nickname. We ignore
// the identity until
// then to prevent confusing error logs.
// TODO: Maybe handle this in WoT. Would require checks in many places though.
continue;
}
synchronized (this) {
/* We lock here and not during the whole function to allow other threads to execute */
Query q = db.query(); // TODO: Encapsulate the query in a function...
q.constrain(WoTIdentity.class);
q.descend("mID").constrain(identityID);
ObjectSet<WoTIdentity> result = q.execute();
WoTIdentity id = null;
if (result.size() == 0) {
try {
importIdentity(bOwnIdentities, identityID, requestURI, insertURI, nickname);
++newCount;
} catch (Exception e) {
Logger.error(this, "Importing a new identity failed.", e);
}
} else {
Logger.debug(this, "Not importing already existing identity " + requestURI);
++ignoredCount;
assert (result.size() == 1);
id = result.next();
id.initializeTransient(mFreetalk);
if (bOwnIdentities != (id instanceof WoTOwnIdentity)) {
// The type of the identity changed so we need to delete and re-import it.
try {
Logger.normal(this, "Identity type changed, replacing it: " + id);
// We MUST NOT take the following locks because deleteIdentity does other locks
// (MessageManager/TaskManager) which must happen before...
// synchronized(id)
// synchronized(db.lock())
deleteIdentity(id, mFreetalk.getMessageManager(), mFreetalk.getTaskManager());
importIdentity(bOwnIdentities, identityID, requestURI, insertURI, nickname);
} catch (Exception e) {
Logger.error(this, "Replacing a WoTIdentity with WoTOwnIdentity failed.", e);
}
} else { // Normal case: Update the last received time of the idefnt
synchronized (id) {
synchronized (db.lock()) {
try {
// TODO: The thread sometimes takes hours to parse the identities and I don't know
// why.
// So right now its better to re-query the time for each identity.
id.setLastReceivedFromWoT(CurrentTimeUTC.getInMillis());
id.checkedCommit(this);
} catch (Exception e) {
Persistent.checkedRollback(db, this, e);
}
}
}
}
}
}
Thread.yield();
}
Logger.normal(
this,
"parseIdentities(bOwnIdentities=="
+ bOwnIdentities
+ " received "
+ idx
+ " identities. Ignored "
+ ignoredCount
+ "; New: "
+ newCount);
}