/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.cursors;
import java.util.Map;
import org.apache.activemq.broker.region.MessageReference;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.management.SizeStatisticImpl;
/**
*
*
*/
public class PendingMessageHelper {
private final Map<MessageId, PendingNode> map;
private final SizeStatisticImpl messageSize;
public PendingMessageHelper(Map<MessageId, PendingNode> map,
SizeStatisticImpl messageSize) {
super();
this.map = map;
this.messageSize = messageSize;
}
public void addToMap(MessageReference message, PendingNode node) {
PendingNode previous = this.map.put(message.getMessageId(), node);
if (previous != null) {
try {
messageSize.addSize(-previous.getMessage().getSize());
} catch (Exception e) {
//expected for NullMessageReference
}
}
try {
messageSize.addSize(message.getSize());
} catch (Exception e) {
//expected for NullMessageReference
}
}
public PendingNode removeFromMap(MessageReference message) {
PendingNode removed = this.map.remove(message.getMessageId());
if (removed != null) {
try {
messageSize.addSize(-removed.getMessage().getSize());
} catch (Exception e) {
//expected for NullMessageReference
}
}
return removed;
}
}