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Whoops, we add new history messages to the end, so start pruning from the

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beginning. To do this more efficiently, we end up having to do some
jockeying.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2679 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2003-06-24 05:19:57 +00:00
parent 71109615bc
commit faee2e4088
1 changed files with 23 additions and 10 deletions
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src/java/com/threerings/crowd/chat/server/SpeakProvider.java
+23 -10
View File
@@ -1,5 +1,5 @@
//
// $Id: SpeakProvider.java,v 1.12 2003/06/14 06:23:41 mdb Exp $
// $Id: SpeakProvider.java,v 1.13 2003/06/24 05:19:57 mdb Exp $
package com.threerings.crowd.chat.server;
@@ -229,7 +229,7 @@ public class SpeakProvider
*/
public static ArrayList getChatHistory (String username)
{
ArrayList history = getHistoryList(username);
HistoryList history = getHistoryList(username);
pruneHistory(System.currentTimeMillis(), history);
return history;
}
@@ -256,7 +256,7 @@ public class SpeakProvider
}
// add the message to this user's chat history
ArrayList history = getHistoryList(username);
HistoryList history = getHistoryList(username);
history.add(msg);
// if the history is big enough, potentially prune it (we always
@@ -271,11 +271,11 @@ public class SpeakProvider
/**
* Returns this user's chat history, creating one if necessary.
*/
protected static ArrayList getHistoryList (String username)
protected static HistoryList getHistoryList (String username)
{
ArrayList history = (ArrayList)_histories.get(username);
HistoryList history = (HistoryList)_histories.get(username);
if (history == null) {
_histories.put(username, history = new ArrayList());
_histories.put(username, history = new HistoryList());
}
return history;
}
@@ -283,17 +283,21 @@ public class SpeakProvider
/**
* Prunes all messages from this history which are expired.
*/
protected static void pruneHistory (long now, ArrayList history)
protected static void pruneHistory (long now, HistoryList history)
{
for (int ii = history.size()-1; ii >= 0; ii--) {
int prunepos = -1;
for (int ii = 0, ll = history.size(); ii < ll; ii++) {
ChatMessage msg = (ChatMessage)history.get(ii);
if (now - msg.timestamp > HISTORY_EXPIRATION) {
Log.info("Expiring from history " + msg + ".");
history.remove(ii);
// Log.info("Expiring from history " + msg + ".");
prunepos = ii;
} else {
break; // stop when we get to the first valid message
}
}
if (prunepos >= 0) {
history.remove(0, prunepos+1);
}
}
/** Used to note the recipients of a chat message. */
@@ -313,6 +317,15 @@ public class SpeakProvider
}
}
/** Extends {@link ArrayList} for the sole purpose of exposing {@link
* ArrayList#removeRange}. Yay! */
protected static class HistoryList extends ArrayList
{
public void remove (int fromIndex, int toIndex) {
removeRange(fromIndex, toIndex);
}
}
/** Our speech object. */
protected DObject _speakObj;