| /** |
| * 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.console.command.store.amq.reader; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import javax.jms.InvalidSelectorException; |
| import javax.jms.Message; |
| |
| import org.apache.activemq.command.DataStructure; |
| import org.apache.activemq.filter.BooleanExpression; |
| import org.apache.activemq.kaha.impl.async.AsyncDataManager; |
| import org.apache.activemq.kaha.impl.async.Location; |
| import org.apache.activemq.openwire.OpenWireFormat; |
| import org.apache.activemq.selector.SelectorParser; |
| import org.apache.activemq.util.ByteSequence; |
| import org.apache.activemq.wireformat.WireFormat; |
| |
| /** |
| * Reads and iterates through data log files for the AMQMessage Store |
| * |
| */ |
| public class AMQReader implements Iterable<Message> { |
| |
| private AsyncDataManager dataManager; |
| private WireFormat wireFormat = new OpenWireFormat(); |
| private File file; |
| private BooleanExpression expression; |
| |
| /** |
| * List all the data files in a directory |
| * @param directory |
| * @return |
| * @throws IOException |
| */ |
| public static Set<File> listDataFiles(File directory) throws IOException{ |
| Set<File>result = new HashSet<File>(); |
| if (directory == null || !directory.exists() || !directory.isDirectory()) { |
| throw new IOException("Invalid Directory " + directory); |
| } |
| AsyncDataManager dataManager = new AsyncDataManager(); |
| dataManager.setDirectory(directory); |
| dataManager.start(); |
| Set<File> set = dataManager.getFiles(); |
| if (set != null) { |
| result.addAll(set); |
| } |
| dataManager.close(); |
| return result; |
| } |
| /** |
| * Create the AMQReader to read a directory of amq data logs - or an |
| * individual data log file |
| * |
| * @param file the directory - or file |
| * @throws IOException |
| * @throws InvalidSelectorException |
| * @throws IOException |
| * @throws InvalidSelectorException |
| */ |
| public AMQReader(File file) throws InvalidSelectorException, IOException { |
| this(file,null); |
| } |
| |
| /** |
| * Create the AMQReader to read a directory of amq data logs - or an |
| * individual data log file |
| * |
| * @param file the directory - or file |
| * @param selector the JMS selector or null to select all |
| * @throws IOException |
| * @throws InvalidSelectorException |
| */ |
| public AMQReader(File file, String selector) throws IOException, InvalidSelectorException { |
| String str = selector != null ? selector.trim() : null; |
| if (str != null && str.length() > 0) { |
| this.expression=SelectorParser.parse(str); |
| } |
| dataManager = new AsyncDataManager(); |
| dataManager.setArchiveDataLogs(false); |
| if (file.isDirectory()) { |
| dataManager.setDirectory(file); |
| } else { |
| dataManager.setDirectory(file.getParentFile()); |
| dataManager.setDirectoryArchive(file); |
| this.file = file; |
| } |
| dataManager.start(); |
| } |
| |
| public Iterator<Message> iterator() { |
| return new AMQIterator(this,this.expression); |
| } |
| |
| |
| protected MessageLocation getNextMessage(MessageLocation lastLocation) |
| throws IllegalStateException, IOException { |
| if (this.file != null) { |
| return getInternalNextMessage(this.file, lastLocation); |
| } |
| return getInternalNextMessage(lastLocation); |
| } |
| |
| private MessageLocation getInternalNextMessage(MessageLocation lastLocation) |
| throws IllegalStateException, IOException { |
| return getInternalNextMessage(null, lastLocation); |
| } |
| |
| private MessageLocation getInternalNextMessage(File file, |
| MessageLocation lastLocation) throws IllegalStateException, |
| IOException { |
| MessageLocation result = lastLocation; |
| if (result != null) { |
| result.setMessage(null); |
| } |
| Message message = null; |
| Location pos = lastLocation != null ? lastLocation.getLocation() : null; |
| while ((pos = getNextLocation(file, pos)) != null) { |
| message = getMessage(pos); |
| if (message != null) { |
| if (result == null) { |
| result = new MessageLocation(); |
| } |
| result.setMessage(message); |
| break; |
| } |
| } |
| result.setLocation(pos); |
| if (pos == null && message == null) { |
| result = null; |
| } else { |
| result.setLocation(pos); |
| } |
| return result; |
| } |
| |
| private Location getNextLocation(File file, Location last) |
| throws IllegalStateException, IOException { |
| if (file != null) { |
| return dataManager.getNextLocation(file, last, true); |
| } |
| return dataManager.getNextLocation(last); |
| } |
| |
| private Message getMessage(Location location) throws IOException { |
| ByteSequence data = dataManager.read(location); |
| DataStructure c = (DataStructure) wireFormat.unmarshal(data); |
| if (c instanceof Message) { |
| return (Message) c; |
| } |
| return null; |
| |
| } |
| } |