/**
* Returns the last jid that the party with the specified <tt>address</tt> contacted us from or
* <tt>null</tt>(or bare jid) if we don't have a jid for the specified <tt>address</tt> yet. The
* method would also purge all entries that haven't seen any activity (i.e. no one has tried to
* get or remap it) for a delay longer than <tt>JID_INACTIVITY_TIMEOUT</tt>.
*
* @param jid the <tt>jid</tt> that we'd like to obtain a threadID for.
* @return the last jid that the party with the specified <tt>address</tt> contacted us from or
* <tt>null</tt> if we don't have a jid for the specified <tt>address</tt> yet.
*/
String getThreadIDForAddress(String jid) {
synchronized (jids) {
purgeOldJids();
StoredThreadID ta = jids.get(jid);
if (ta == null) return null;
ta.lastUpdatedTime = System.currentTimeMillis();
return ta.threadID;
}
}
/**
* Remove from our <tt>jids</tt> map all entries that have not seen any activity (i.e. neither
* outgoing nor incoming messags) for more than JID_INACTIVITY_TIMEOUT. Note that this method is
* not synchronous and that it is only meant for use by the {@link #getThreadIDForAddress(String)}
* and {@link #putJidForAddress(String, String)}
*/
private void purgeOldJids() {
long currentTime = System.currentTimeMillis();
Iterator<Map.Entry<String, StoredThreadID>> entries = jids.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry<String, StoredThreadID> entry = entries.next();
StoredThreadID target = entry.getValue();
if (currentTime - target.lastUpdatedTime > JID_INACTIVITY_TIMEOUT) entries.remove();
}
}
/**
* Maps the specified <tt>address</tt> to <tt>jid</tt>. The point of this method is to allow us to
* send all messages destined to the contact with the specified <tt>address</tt> to the
* <tt>jid</tt> that they last contacted us from.
*
* @param threadID the threadID of conversation.
* @param jid the jid (i.e. address/resource) that the contact with the specified <tt>address</tt>
* last contacted us from.
*/
private void putJidForAddress(String jid, String threadID) {
synchronized (jids) {
purgeOldJids();
StoredThreadID ta = jids.get(jid);
if (ta == null) {
ta = new StoredThreadID();
jids.put(jid, ta);
}
recentJIDForAddress.put(StringUtils.parseBareAddress(jid), jid);
ta.lastUpdatedTime = System.currentTimeMillis();
ta.threadID = threadID;
}
}