/**
* 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.strategy;
import java.io.File;
import java.util.Map;
import org.apache.camel.CamelContext;
import org.apache.camel.Expression;
import org.apache.camel.LoggingLevel;
import org.apache.camel.component.file.GenericFileExclusiveReadLockStrategy;
import org.apache.camel.component.file.GenericFileProcessStrategy;
import org.apache.camel.spi.Language;
import org.apache.camel.util.ObjectHelper;
public final class FileProcessStrategyFactory {
private FileProcessStrategyFactory() {
}
public static GenericFileProcessStrategy<File> createGenericFileProcessStrategy(CamelContext context, Map<String, Object> params) {
// We assume a value is present only if its value not null for String and 'true' for boolean
Expression moveExpression = (Expression) params.get("move");
Expression moveFailedExpression = (Expression) params.get("moveFailed");
Expression preMoveExpression = (Expression) params.get("preMove");
boolean isNoop = params.get("noop") != null;
boolean isDelete = params.get("delete") != null;
boolean isMove = moveExpression != null || preMoveExpression != null || moveFailedExpression != null;
if (isDelete) {
GenericFileDeleteProcessStrategy<File> strategy = new GenericFileDeleteProcessStrategy<File>();
strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
if (preMoveExpression != null) {
GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
renamer.setExpression(preMoveExpression);
strategy.setBeginRenamer(renamer);
}
if (moveFailedExpression != null) {
GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
renamer.setExpression(moveFailedExpression);
strategy.setFailureRenamer(renamer);
}
return strategy;
} else if (isMove || isNoop) {
GenericFileRenameProcessStrategy<File> strategy = new GenericFileRenameProcessStrategy<File>();
strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
if (!isNoop) {
// move on commit is only possible if not noop
if (moveExpression != null) {
GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
renamer.setExpression(moveExpression);
strategy.setCommitRenamer(renamer);
} else {
strategy.setCommitRenamer(getDefaultCommitRenamer(context));
}
}
// both move and noop supports pre move
if (preMoveExpression != null) {
GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
renamer.setExpression(preMoveExpression);
strategy.setBeginRenamer(renamer);
}
// both move and noop supports move failed
if (moveFailedExpression != null) {
GenericFileExpressionRenamer<File> renamer = new GenericFileExpressionRenamer<File>();
renamer.setExpression(moveFailedExpression);
strategy.setFailureRenamer(renamer);
}
return strategy;
} else {
// default strategy will move files in a .camel/ subfolder where the file was consumed
GenericFileRenameProcessStrategy<File> strategy = new GenericFileRenameProcessStrategy<File>();
strategy.setExclusiveReadLockStrategy(getExclusiveReadLockStrategy(params));
strategy.setCommitRenamer(getDefaultCommitRenamer(context));
return strategy;
}
}
private static GenericFileExpressionRenamer<File> getDefaultCommitRenamer(CamelContext context) {
// use context to lookup language to let it be loose coupled
Language language = context.resolveLanguage("file");
Expression expression = language.createExpression("${file:parent}/.camel/${file:onlyname}");
return new GenericFileExpressionRenamer<File>(expression);
}
@SuppressWarnings("unchecked")
private static GenericFileExclusiveReadLockStrategy<File> getExclusiveReadLockStrategy(Map<String, Object> params) {
GenericFileExclusiveReadLockStrategy<File> strategy = (GenericFileExclusiveReadLockStrategy<File>) params.get("exclusiveReadLockStrategy");
if (strategy != null) {
return strategy;
}
// no explicit strategy set then fallback to readLock option
String readLock = (String) params.get("readLock");
if (ObjectHelper.isNotEmpty(readLock)) {
if ("none".equals(readLock) || "false".equals(readLock)) {
return null;
} else if ("markerFile".equals(readLock)) {
return new MarkerFileExclusiveReadLockStrategy();
} else if ("fileLock".equals(readLock)) {
strategy = new FileLockExclusiveReadLockStrategy();
} else if ("rename".equals(readLock)) {
strategy = new FileRenameExclusiveReadLockStrategy();
} else if ("changed".equals(readLock)) {
FileChangedExclusiveReadLockStrategy readLockStrategy = new FileChangedExclusiveReadLockStrategy();
Long minLength = (Long) params.get("readLockMinLength");
if (minLength != null) {
readLockStrategy.setMinLength(minLength);
}
strategy = readLockStrategy;
}
if (strategy != null) {
Long timeout = (Long) params.get("readLockTimeout");
if (timeout != null) {
strategy.setTimeout(timeout);
}
Long checkInterval = (Long) params.get("readLockCheckInterval");
if (checkInterval != null) {
strategy.setCheckInterval(checkInterval);
}
LoggingLevel readLockLoggingLevel = (LoggingLevel) params.get("readLockLoggingLevel");
if (readLockLoggingLevel != null) {
strategy.setReadLockLoggingLevel(readLockLoggingLevel);
}
}
}
return strategy;
}
}