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 */
017package org.apache.camel.component.file.strategy;
018
019import org.apache.camel.Exchange;
020import org.apache.camel.component.file.FileEndpoint;
021import org.apache.camel.component.file.GenericFile;
022import org.apache.camel.component.file.GenericFileEndpoint;
023import org.apache.camel.component.file.GenericFileOperations;
024import org.apache.camel.util.ExchangeHelper;
025
026public class GenericFileRenameProcessStrategy<T> extends GenericFileProcessStrategySupport<T> {
027    private GenericFileRenamer<T> beginRenamer;
028    private GenericFileRenamer<T> failureRenamer;
029    private GenericFileRenamer<T> commitRenamer;
030
031    public GenericFileRenameProcessStrategy() {
032    }
033
034    @Override
035    public boolean begin(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception {
036        // must invoke super
037        boolean result = super.begin(operations, endpoint, exchange, file);
038        if (!result) {
039            return false;
040        }
041
042        // okay we got the file then execute the begin renamer
043        if (beginRenamer != null) {
044            GenericFile<T> newName = beginRenamer.renameFile(exchange, file);
045            GenericFile<T> to = renameFile(operations, file, newName);
046            FileEndpoint fe = null;
047            if (endpoint instanceof FileEndpoint) {
048                fe = (FileEndpoint)endpoint;
049                if (to != null) {
050                    to.bindToExchange(exchange, fe.isProbeContentType());
051                }
052            } else {
053                if (to != null) {
054                    to.bindToExchange(exchange);
055                }
056            }
057            
058        }
059
060        return true;
061    }
062
063    @Override
064    public void rollback(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception {
065        try {
066            operations.releaseRetrievedFileResources(exchange);
067
068            if (failureRenamer != null) {
069                // create a copy and bind the file to the exchange to be used by the renamer to evaluate the file name
070                Exchange copy = ExchangeHelper.createCopy(exchange, true);
071                FileEndpoint fe = null;
072                if (endpoint instanceof FileEndpoint) {
073                    fe = (FileEndpoint)endpoint;
074                    file.bindToExchange(copy, fe.isProbeContentType());
075                } else {
076                    file.bindToExchange(copy);
077                }
078                // must preserve message id
079                copy.getIn().setMessageId(exchange.getIn().getMessageId());
080                copy.setExchangeId(exchange.getExchangeId());
081
082                GenericFile<T> newName = failureRenamer.renameFile(copy, file);
083                renameFile(operations, file, newName);
084            }
085        } finally {
086            if (exclusiveReadLockStrategy != null) {
087                exclusiveReadLockStrategy.releaseExclusiveReadLockOnRollback(operations, file, exchange);
088            }
089            deleteLocalWorkFile(exchange);
090        }
091    }
092
093    @Override
094    public void commit(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception {
095        try {
096            operations.releaseRetrievedFileResources(exchange);
097            
098            if (commitRenamer != null) {
099                // create a copy and bind the file to the exchange to be used by the renamer to evaluate the file name
100                Exchange copy = ExchangeHelper.createCopy(exchange, true);
101                FileEndpoint fe = null;
102                if (endpoint instanceof FileEndpoint) {
103                    fe = (FileEndpoint)endpoint;
104                    file.bindToExchange(copy, fe.isProbeContentType());
105                }  else {
106                    file.bindToExchange(copy);
107                }
108                // must preserve message id
109                copy.getIn().setMessageId(exchange.getIn().getMessageId());
110                copy.setExchangeId(exchange.getExchangeId());
111
112                GenericFile<T> newName = commitRenamer.renameFile(copy, file);
113                renameFile(operations, file, newName);
114            }
115        } finally {
116            deleteLocalWorkFile(exchange);
117            // must release lock last
118            if (exclusiveReadLockStrategy != null) {
119                exclusiveReadLockStrategy.releaseExclusiveReadLockOnCommit(operations, file, exchange);
120            }
121        }
122    }
123
124    public GenericFileRenamer<T> getBeginRenamer() {
125        return beginRenamer;
126    }
127
128    public void setBeginRenamer(GenericFileRenamer<T> beginRenamer) {
129        this.beginRenamer = beginRenamer;
130    }
131
132    public GenericFileRenamer<T> getCommitRenamer() {
133        return commitRenamer;
134    }
135
136    public void setCommitRenamer(GenericFileRenamer<T> commitRenamer) {
137        this.commitRenamer = commitRenamer;
138    }
139
140    public GenericFileRenamer<T> getFailureRenamer() {
141        return failureRenamer;
142    }
143
144    public void setFailureRenamer(GenericFileRenamer<T> failureRenamer) {
145        this.failureRenamer = failureRenamer;
146    }
147}