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fix to avoid NPE 

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@515746 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
James Strachan 2007-03-07 20:53:24 +00:00
parent 2a3fddbdea
commit 10185cadd7
1 changed files with 35 additions and 37 deletions
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72
activemq-core/src/main/java/org/apache/activemq/store/kahadaptor/TopicSubContainer.java
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@ -1,73 +1,72 @@
/**
*
*
* 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.store.kahadaptor;
import java.util.Iterator;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.kaha.ListContainer;
import org.apache.activemq.kaha.StoreEntry;
import java.util.Iterator;
/**
* Holds information for the subscriber
*
*
* @version $Revision: 1.10 $
*/
public class TopicSubContainer{
public class TopicSubContainer {
private ListContainer listContainer;
private StoreEntry batchEntry;
public TopicSubContainer(ListContainer container){
public TopicSubContainer(ListContainer container) {
this.listContainer = container;
}
/**
* @return the batchEntry
*/
public StoreEntry getBatchEntry(){
public StoreEntry getBatchEntry() {
return this.batchEntry;
}
/**
* @param batchEntry the batchEntry to set
*/
public void setBatchEntry(StoreEntry batchEntry){
this.batchEntry=batchEntry;
public void setBatchEntry(StoreEntry batchEntry) {
this.batchEntry = batchEntry;
}
public void reset() {
public void reset() {
batchEntry = null;
}
public boolean isEmpty() {
return listContainer.isEmpty();
}
public StoreEntry add(ConsumerMessageRef ref) {
return listContainer.placeLast(ref);
}
public ConsumerMessageRef remove(MessageId id){
ConsumerMessageRef result=null;
if(!listContainer.isEmpty()){
for(StoreEntry entry=listContainer.getFirst();entry!=null;entry=listContainer.getNext(entry)){
ConsumerMessageRef ref=(ConsumerMessageRef)listContainer.get(entry);
if(ref!=null&&ref.getMessageId().equals(id)){
public ConsumerMessageRef remove(MessageId id) {
ConsumerMessageRef result = null;
if (!listContainer.isEmpty()) {
for (StoreEntry entry = listContainer.getFirst(); entry != null; entry = listContainer.getNext(entry)) {
ConsumerMessageRef ref = (ConsumerMessageRef) listContainer.get(entry);
if (ref != null && ref.getMessageId().equals(id)) {
listContainer.remove(entry);
result=ref;
if(listContainer.isEmpty()||batchEntry.equals(entry)){
result = ref;
if (listContainer != null && batchEntry != null && (listContainer.isEmpty() || batchEntry.equals(entry))) {
reset();
}
}
@ -75,34 +74,33 @@ import org.apache.activemq.kaha.StoreEntry;
}
return result;
}
public ConsumerMessageRef get(StoreEntry entry) {
return (ConsumerMessageRef)listContainer.get(entry);
return (ConsumerMessageRef) listContainer.get(entry);
}
public StoreEntry getEntry() {
return listContainer.getFirst();
}
public StoreEntry refreshEntry(StoreEntry entry) {
return listContainer.refresh(entry);
}
public StoreEntry getNextEntry(StoreEntry entry) {
return listContainer.getNext(entry);
}
public Iterator iterator() {
return listContainer.iterator();
}
public int size() {
return listContainer.size();
}
public void clear() {
reset();
listContainer.clear();
}
}