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| @@ -1,5 +1,5 @@ | ||
| vendor=IIT Software GmbH, Muenster, Germany | ||
| release=12.03.08 | ||
| release=12.03.09 | ||
| distribution=Community Edition | ||
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77 changes: 77 additions & 0 deletions
77
swiftlets/sys_queuemanager/src/main/java/com/swiftmq/impl/queue/standard/ViewCollector.java
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| /* | ||
| * Copyright 2022 IIT Software GmbH | ||
| * | ||
| * IIT Software GmbH 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. | ||
| * | ||
| */ | ||
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| package com.swiftmq.impl.queue.standard; | ||
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| import com.swiftmq.ms.MessageSelector; | ||
| import com.swiftmq.swiftlet.queue.AbstractQueue; | ||
| import com.swiftmq.swiftlet.queue.MessageEntry; | ||
| import com.swiftmq.swiftlet.queue.MessageIndex; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
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| public class ViewCollector { | ||
| private final AbstractQueue abstractQueue; | ||
| private final int from; | ||
| private List<MessageIndex> collected = null; | ||
| private int viewId = -1; | ||
| private int index = 0; | ||
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| public ViewCollector(AbstractQueue abstractQueue, int from, MessageSelector selector, int max) throws Exception { | ||
| this.abstractQueue = abstractQueue; | ||
| this.from = from; | ||
| Set<MessageIndex> queueContent; | ||
| if (selector != null) { | ||
| this.viewId = abstractQueue.createView(selector); | ||
| queueContent = abstractQueue.getQueueIndex(this.viewId); | ||
| } else | ||
| queueContent = abstractQueue.getQueueIndex(); | ||
| if (from < queueContent.size()) | ||
| collected = new ArrayList<>(queueContent).subList(from, Math.min(from + max, queueContent.size())); | ||
| else | ||
| collected = new ArrayList<>(); | ||
| } | ||
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| public int resultSize() { | ||
| return collected.size(); | ||
| } | ||
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| public long queueSize() throws Exception { | ||
| return abstractQueue.getNumberQueueMessages(); | ||
| } | ||
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| public ViewEntry next() throws Exception { | ||
| ViewEntry viewEntry = null; | ||
| MessageEntry messageEntry = null; | ||
| for (int i = index; i < collected.size(); i++) { | ||
| messageEntry = abstractQueue.getMessageByIndex(collected.get(i)); | ||
| if (messageEntry != null) { | ||
| viewEntry = new ViewEntry(messageEntry, from + i); | ||
| index = i + 1; | ||
| break; | ||
| } | ||
| } | ||
| return viewEntry; | ||
| } | ||
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| public void close() { | ||
| if (viewId != -1) | ||
| this.abstractQueue.deleteView(viewId); | ||
| } | ||
| } |
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