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ActiveMQ example source code file (DiskIndexLinkedListTest.java)
The ActiveMQ DiskIndexLinkedListTest.java source code/** * 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.kaha.impl.index; import java.io.File; import java.io.IOException; import java.util.concurrent.atomic.AtomicLong; import org.apache.activemq.kaha.impl.DataManager; import org.apache.activemq.kaha.impl.data.DataManagerImpl; import org.apache.activemq.kaha.impl.data.Item; import org.apache.activemq.util.IOHelper; public class DiskIndexLinkedListTest extends VMIndexLinkedListTest { private IndexManager im; protected IndexLinkedList createList(IndexItem root) throws IOException { String dirName = System.getProperty("basedir", ".") + "/target/activemq-data/testIndex"; File file = new File(dirName); file.mkdirs(); IOHelper.deleteChildren(file); DataManager dm = new DataManagerImpl(file,"test",new AtomicLong()); im = new IndexManager(file,"test","rw",dm,new AtomicLong()); root = im.createNewIndex(); im.storeIndex(root); return new DiskIndexLinkedList(im,root); } IndexItem createIndex(IndexLinkedList indexList,int offset) throws IOException { IndexItem result = im.createNewIndex(); im.storeIndex(result); return result; } protected void addToList(IndexLinkedList list,IndexItem item) throws IOException { IndexItem root = list.getRoot(); IndexItem prev = list.getLast(); prev = prev != null ? prev : root; IndexItem next = list.getNextEntry(prev); prev.setNextItem(item.getOffset()); item.setPreviousItem(prev.getOffset()); im.updateIndexes(prev); if (next != null) { next.setPreviousItem(item.getOffset()); item.setNextItem(next.getOffset()); im.updateIndexes(next); } im.storeIndex(item); list.add(item); } protected void insertToList(IndexLinkedList list,int pos,IndexItem item) throws IOException { IndexItem root = list.getRoot(); IndexItem prev = null; IndexItem next = null; if (pos <= 0) { prev = root; next = list.getNextEntry(root); } else if (pos >= list.size()) { prev = list.getLast(); if (prev==null) { prev=root; } next = null; } else { prev = list.get(pos); prev = prev != null ? prev : root; next = list.getNextEntry(prev); } prev.setNextItem(item.getOffset()); item.setPreviousItem(prev.getOffset()); im.updateIndexes(prev); if (next != null) { next.setPreviousItem(item.getOffset()); item.setNextItem(next.getOffset()); im.updateIndexes(next); } im.storeIndex(item); list.setRoot(root); list.add(pos,item); } protected void insertFirst(IndexLinkedList list,IndexItem item) throws IOException { IndexItem root = list.getRoot(); IndexItem prev = root; IndexItem next = list.getNextEntry(prev); prev.setNextItem(item.getOffset()); item.setPreviousItem(prev.getOffset()); im.updateIndexes(prev); if (next != null) { next.setPreviousItem(item.getOffset()); item.setNextItem(next.getOffset()); im.updateIndexes(next); } im.storeIndex(item); list.addFirst(item); } protected synchronized void remove(IndexLinkedList list,IndexItem item) throws IOException { IndexItem root = list.getRoot(); IndexItem prev = list.getPrevEntry(item); IndexItem next = list.getNextEntry(item); list.remove(item); prev = prev == null ? root : prev; next = (next == null || !next.equals(root)) ? next : null; if (next != null) { prev.setNextItem(next.getOffset()); next.setPreviousItem(prev.getOffset()); im.updateIndexes(next); } else { prev.setNextItem(Item.POSITION_NOT_SET); } im.updateIndexes(prev); } } Other ActiveMQ examples (source code examples)Here is a short list of links related to this ActiveMQ DiskIndexLinkedListTest.java source code file: |
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