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.CamelContext; 023 import org.apache.camel.Expression; 024 import org.apache.camel.component.file.GenericFileExclusiveReadLockStrategy; 025 import org.apache.camel.component.file.GenericFileProcessStrategy; 026 import org.apache.camel.spi.Language; 027 import org.apache.camel.util.ObjectHelper; 028 029 public final class FileProcessStrategyFactory { 030 031 private FileProcessStrategyFactory() { 032 } 033 034 public static GenericFileProcessStrategy createGenericFileProcessStrategy(CamelContext context, Map<String, Object> params) { 035 036 // We assume a value is present only if its value not null for String and 'true' for boolean 037 boolean isNoop = params.get("noop") != null; 038 boolean isDelete = params.get("delete") != null; 039 Expression moveExpression = (Expression) params.get("move"); 040 Expression preMoveExpression = (Expression) params.get("preMove"); 041 042 if (isNoop) { 043 GenericFileNoOpProcessStrategy<File> strategy = new GenericFileNoOpProcessStrategy<File>(); 044 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params)); 045 return strategy; 046 } else if (isDelete) { 047 GenericFileDeleteProcessStrategy<File> strategy = new GenericFileDeleteProcessStrategy<File>(); 048 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params)); 049 return strategy; 050 } else if (moveExpression != null || preMoveExpression != null) { 051 GenericFileRenameProcessStrategy<File> strategy = new GenericFileRenameProcessStrategy<File>(); 052 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params)); 053 if (moveExpression != null) { 054 GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>(); 055 renamer.setExpression(moveExpression); 056 strategy.setCommitRenamer(renamer); 057 } 058 if (preMoveExpression != null) { 059 GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>(); 060 renamer.setExpression(preMoveExpression); 061 strategy.setBeginRenamer(renamer); 062 } 063 return strategy; 064 } else { 065 // default strategy will move files in a .camel/ subfolder where the file was consumed 066 GenericFileRenameProcessStrategy<File> strategy = new GenericFileRenameProcessStrategy<File>(); 067 strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params)); 068 // use context to lookup language to let it be loose coupled 069 Language language = context.resolveLanguage("file"); 070 Expression expression = language.createExpression("${file:parent}/.camel/${file:onlyname}"); 071 strategy.setCommitRenamer(new GenericFileExpressionRenamer<File>(expression)); 072 return strategy; 073 } 074 } 075 076 @SuppressWarnings("unchecked") 077 private static GenericFileExclusiveReadLockStrategy<File> getExclusiveReadLockStrategy(Map<String, Object> params) { 078 GenericFileExclusiveReadLockStrategy strategy = (GenericFileExclusiveReadLockStrategy) params.get("exclusiveReadLockStrategy"); 079 if (strategy != null) { 080 return strategy; 081 } 082 083 // no explicit stategy set then fallback to readLock option 084 String readLock = (String) params.get("readLock"); 085 if (ObjectHelper.isNotEmpty(readLock)) { 086 if ("none".equals(readLock) || "false".equals(readLock)) { 087 return null; 088 } else if ("fileLock".equals(readLock)) { 089 GenericFileExclusiveReadLockStrategy<File> readLockStrategy = new FileLockExclusiveReadLockStrategy(); 090 Long timeout = (Long) params.get("readLockTimeout"); 091 if (timeout != null) { 092 readLockStrategy.setTimeout(timeout); 093 } 094 return readLockStrategy; 095 } else if ("rename".equals(readLock)) { 096 GenericFileExclusiveReadLockStrategy<File> readLockStrategy = new GenericFileRenameExclusiveReadLockStrategy<File>(); 097 Long timeout = (Long) params.get("readLockTimeout"); 098 if (timeout != null) { 099 readLockStrategy.setTimeout(timeout); 100 } 101 return readLockStrategy; 102 } else if ("markerFile".equals(readLock)) { 103 return new MarkerFileExclusiveReadLockStrategy(); 104 } 105 } 106 107 return null; 108 } 109 }