/*
* Copyright (C) 2010-2101 Alibaba Group Holding Limited.
*
* Licensed 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 com.alibaba.otter.node.etl.common.io.download;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.SystemUtils;
import com.alibaba.otter.node.etl.common.io.download.exception.DataRetrieveException;
import com.alibaba.otter.node.etl.common.io.download.impl.aria2c.Aria2cRetriever;
import com.alibaba.otter.shared.common.model.config.parameter.SystemParameter.RetrieverType;
/**
* DataRetriever工厂，选择合适的下载器
*
* @author jianghang 2011-11-3 下午07:42:05
* @version 4.0.0
*/
public class DataRetrieverFactory {
public DataRetriever createRetriever(RetrieverType type, String url, String targetDir) {
if (type.isAria2c()) {
return getAria2cRetriever(type.getExe(), url, targetDir);
} else {
// 其他的类型
}
throw new DataRetrieveException("no DataRetriever for[" + type + "]");
}
private DataRetriever getAria2cRetriever(String cmd, String url, String targetDir) {
if (StringUtils.isEmpty(cmd)) {
cmd = (SystemUtils.IS_OS_WINDOWS ? cmd + ".exe" : cmd);
}
return new Aria2cRetriever(cmd, url, targetDir);
}
}