org.apache.camel.component.file.GenericFileDefaultMoveExistingFileStrategy Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of camel-core Show documentation
Show all versions of camel-core Show documentation
The Core Camel Java DSL based router
/**
* 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.camel.component.file;
import java.io.File;
import org.apache.camel.Exchange;
import org.apache.camel.component.file.strategy.FileMoveExistingStrategy;
import org.apache.camel.util.FileUtil;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GenericFileDefaultMoveExistingFileStrategy implements FileMoveExistingStrategy {
private static final Logger LOG = LoggerFactory.getLogger(GenericFileDefaultMoveExistingFileStrategy.class);
/**
* Moves any existing file due fileExists=Move is in use.
*/
@Override
public boolean moveExistingFile(GenericFileEndpoint endpoint, GenericFileOperations operations, String fileName)
throws GenericFileOperationFailedException {
// need to evaluate using a dummy and simulate the file first, to have access to all the file attributes
// create a dummy exchange as Exchange is needed for expression evaluation
// we support only the following 3 tokens.
Exchange dummy = endpoint.createExchange();
String parent = FileUtil.onlyPath(fileName);
String onlyName = FileUtil.stripPath(fileName);
dummy.getIn().setHeader(Exchange.FILE_NAME, fileName);
dummy.getIn().setHeader(Exchange.FILE_NAME_ONLY, onlyName);
dummy.getIn().setHeader(Exchange.FILE_PARENT, parent);
String to = endpoint.getMoveExisting().evaluate(dummy, String.class);
// we must normalize it (to avoid having both \ and / in the name which confuses java.io.File)
to = FileUtil.normalizePath(to);
if (ObjectHelper.isEmpty(to)) {
throw new GenericFileOperationFailedException("moveExisting evaluated as empty String, cannot move existing file: " + fileName);
}
// ensure any paths is created before we rename as the renamed file may be in a different path (which may be non exiting)
// use java.io.File to compute the file path
File toFile = new File(to);
String directory = toFile.getParent();
boolean absolute = FileUtil.isAbsolute(toFile);
if (directory != null) {
if (!operations.buildDirectory(directory, absolute)) {
LOG.debug("Cannot build directory [{}] (could be because of denied permissions)", directory);
}
}
// deal if there already exists a file
if (operations.existsFile(to)) {
if (endpoint.isEagerDeleteTargetFile()) {
LOG.trace("Deleting existing file: {}", to);
if (!operations.deleteFile(to)) {
throw new GenericFileOperationFailedException("Cannot delete file: " + to);
}
} else {
throw new GenericFileOperationFailedException("Cannot move existing file from: " + fileName + " to: " + to + " as there already exists a file: " + to);
}
}
LOG.trace("Moving existing file: {} to: {}", fileName, to);
if (!operations.renameFile(fileName, to)) {
throw new GenericFileOperationFailedException("Cannot rename file from: " + fileName + " to: " + to);
}
return true;
}
}