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Posted to commits@activemq.apache.org by js...@apache.org on 2006/03/03 15:18:35 UTC
svn commit: r382830 -
/incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java
Author: jstrachan
Date: Fri Mar 3 06:18:34 2006
New Revision: 382830
URL: http://svn.apache.org/viewcvs?rev=382830&view=rev
Log:
added an alternative eviction strategy
Added:
incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java (with props)
Added: incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java
URL: http://svn.apache.org/viewcvs/incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java?rev=382830&view=auto
==============================================================================
--- incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java (added)
+++ incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java Fri Mar 3 06:18:34 2006
@@ -0,0 +1,48 @@
+/**
+ *
+ * Copyright 2005-2006 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.broker.region.policy;
+
+import org.apache.activemq.broker.region.MessageReference;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.LinkedList;
+
+/**
+ * An eviction strategy which evicts the oldest message with the lowest priority first.
+ *
+ * @org.apache.xbean.XBean
+ *
+ * @version $Revision$messageEvictionStrategy
+ */
+public class OldestMessageWithLowestPriorityEvictionStrategy implements MessageEvictionStrategy {
+
+ public MessageReference evictMessage(LinkedList messages) throws IOException {
+ byte lowestPriority = Byte.MAX_VALUE;
+ int pivot = 0;
+ Iterator iter = messages.iterator();
+ for (int i = 0; iter.hasNext(); i++) {
+ MessageReference reference = (MessageReference) iter.next();
+ byte priority = reference.getMessage().getPriority();
+ if (priority < lowestPriority) {
+ lowestPriority = priority;
+ pivot = i;
+ }
+ }
+ return (MessageReference) messages.remove(pivot);
+ }
+}
Propchange: incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java
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Propchange: incubator/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/policy/OldestMessageWithLowestPriorityEvictionStrategy.java
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