001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.component.file.strategy;
018
019 import java.io.File;
020 import java.util.Map;
021
022 import org.apache.camel.Expression;
023 import org.apache.camel.component.file.GenericFileExclusiveReadLockStrategy;
024 import org.apache.camel.component.file.GenericFileProcessStrategy;
025 import org.apache.camel.language.simple.FileLanguage;
026 import org.apache.camel.util.ObjectHelper;
027
028 public final class FileProcessStrategyFactory {
029
030 private FileProcessStrategyFactory() {
031 }
032
033 public static GenericFileProcessStrategy createGenericFileProcessStrategy(Map<String, Object> params) {
034
035 // We assume a value is present only if its value not null for String and 'true' for boolean
036 boolean isNoop = params.get("noop") != null;
037 boolean isDelete = params.get("delete") != null;
038 Expression moveExpression = (Expression) params.get("move");
039 Expression preMoveExpression = (Expression) params.get("preMove");
040
041 if (isNoop) {
042 GenericFileNoOpProcessStrategy<File> strategy = new GenericFileNoOpProcessStrategy<File>();
043 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
044 return strategy;
045 } else if (isDelete) {
046 GenericFileDeleteProcessStrategy<File> strategy = new GenericFileDeleteProcessStrategy<File>();
047 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
048 return strategy;
049 } else if (moveExpression != null || preMoveExpression != null) {
050 GenericFileRenameProcessStrategy<File> strategy = new GenericFileRenameProcessStrategy<File>();
051 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
052 if (moveExpression != null) {
053 GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
054 renamer.setExpression(moveExpression);
055 strategy.setCommitRenamer(renamer);
056 }
057 if (preMoveExpression != null) {
058 GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
059 renamer.setExpression(preMoveExpression);
060 strategy.setBeginRenamer(renamer);
061 }
062 return strategy;
063 } else {
064 // default strategy will move files in a .camel/ subfolder where the file was consumed
065 GenericFileRenameProcessStrategy<File> strategy = new GenericFileRenameProcessStrategy<File>();
066 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
067 Expression exp = FileLanguage.file("${file:parent}/.camel/${file:onlyname}");
068 strategy.setCommitRenamer(new GenericFileExpressionRenamer<File>(exp));
069 return strategy;
070 }
071 }
072
073 @SuppressWarnings("unchecked")
074 private static GenericFileExclusiveReadLockStrategy<File> getExclusiveReadLockStrategy(Map<String, Object> params) {
075 GenericFileExclusiveReadLockStrategy strategy = (GenericFileExclusiveReadLockStrategy) params.get("exclusiveReadLockStrategy");
076 if (strategy != null) {
077 return strategy;
078 }
079
080 // no explicit stategy set then fallback to readLock option
081 String readLock = (String) params.get("readLock");
082 if (ObjectHelper.isNotEmpty(readLock)) {
083 if ("none".equals(readLock) || "false".equals(readLock)) {
084 return null;
085 } else if ("fileLock".equals(readLock)) {
086 GenericFileExclusiveReadLockStrategy<File> readLockStrategy = new FileLockExclusiveReadLockStrategy();
087 Long timeout = (Long) params.get("readLockTimeout");
088 if (timeout != null) {
089 readLockStrategy.setTimeout(timeout);
090 }
091 return readLockStrategy;
092 } else if ("rename".equals(readLock)) {
093 GenericFileExclusiveReadLockStrategy<File> readLockStrategy = new GenericFileRenameExclusiveReadLockStrategy<File>();
094 Long timeout = (Long) params.get("readLockTimeout");
095 if (timeout != null) {
096 readLockStrategy.setTimeout(timeout);
097 }
098 return readLockStrategy;
099 } else if ("markerFile".equals(readLock)) {
100 return new MarkerFileExclusiveReadLockStrategy();
101 }
102 }
103
104 return null;
105 }
106 }