/*
* Copyright 2012 Twitter, Inc.
*
* 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.twitter.hdfsdu;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.json.simple.JSONObject;
import com.google.common.collect.Lists;
import com.twitter.hdfsdu.data.DataTransformer;
import com.twitter.hdfsdu.data.NodeData;
public class TreeSizeByPathServlet extends SizeByPathServlet {
@Override
public Iterable<String> getLines(HttpServletRequest request) {
String paramPath = request.getParameter("path");
if (paramPath == null) {
paramPath = "/";
}
List<String> lines = Lists.newLinkedList();
List<NodeData> elems = Lists.newArrayList();
Integer paramDepth = request.getParameter("depth") == null ? 2
: Integer.parseInt(request.getParameter("depth"));
try {
ResultSet resultSet = getSizeByPath(request);
NodeData data;
while (resultSet.next()) {
data = new NodeData();
data.fileSize = resultSet.getString("size_in_bytes");
data.nChildren = resultSet.getLong("file_count");
data.path = resultSet.getString("path");
data.leaf = resultSet.getBoolean("leaf");
elems.add(data);
}
JSONObject jsonObject = DataTransformer.getJSONTree(paramPath, paramDepth, elems);
String ans = null;
if (jsonObject != null) {
ans = jsonObject.toJSONString();
}
if (ans == null) {
lines.add("{ \"children\": [] }");
} else {
lines.add(ans);
}
} catch (SQLException e) {
e.printStackTrace();
}
return lines;
}
}