| /** |
| * 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.tajo.pullserver.retriever; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.tajo.ExecutionBlockId; |
| import org.apache.tajo.TaskAttemptId; |
| import org.apache.tajo.TaskId; |
| import org.apache.tajo.pullserver.FileAccessForbiddenException; |
| import org.apache.tajo.util.TajoIdUtils; |
| |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.handler.codec.http.HttpRequest; |
| import io.netty.handler.codec.http.QueryStringDecoder; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class AdvancedDataRetriever implements DataRetriever { |
| private final Log LOG = LogFactory.getLog(AdvancedDataRetriever.class); |
| private final Map<String, RetrieverHandler> handlerMap = Maps.newConcurrentMap(); |
| |
| public AdvancedDataRetriever() { |
| } |
| |
| public void register(String taskAttemptId, RetrieverHandler handler) { |
| synchronized (handlerMap) { |
| if (!handlerMap.containsKey(taskAttemptId)) { |
| handlerMap.put(taskAttemptId, handler); |
| } |
| } |
| } |
| |
| public void unregister(String taskAttemptId) { |
| synchronized (handlerMap) { |
| if (handlerMap.containsKey(taskAttemptId)) { |
| handlerMap.remove(taskAttemptId); |
| } |
| } |
| } |
| |
| @Override |
| public FileChunk [] handle(ChannelHandlerContext ctx, HttpRequest request) |
| throws IOException { |
| |
| final Map<String, List<String>> params = |
| new QueryStringDecoder(request.getUri()).parameters(); |
| |
| if (!params.containsKey("qid")) { |
| throw new FileNotFoundException("No such qid: " + params.containsKey("qid")); |
| } |
| |
| if (params.containsKey("sid")) { |
| List<FileChunk> chunks = Lists.newArrayList(); |
| List<String> taskIds = splitMaps(params.get("qid")); |
| for (String eachTaskId : taskIds) { |
| String[] taskIdSeqTokens = eachTaskId.split("_"); |
| ExecutionBlockId ebId = TajoIdUtils.createExecutionBlockId(params.get("sid").get(0)); |
| TaskId quid = new TaskId(ebId, Integer.parseInt(taskIdSeqTokens[0])); |
| |
| TaskAttemptId attemptId = new TaskAttemptId(quid, Integer.parseInt(taskIdSeqTokens[1])); |
| |
| RetrieverHandler handler = handlerMap.get(attemptId.toString()); |
| FileChunk chunk = handler.get(params); |
| chunks.add(chunk); |
| } |
| return chunks.toArray(new FileChunk[chunks.size()]); |
| } else { |
| RetrieverHandler handler = handlerMap.get(params.get("qid").get(0)); |
| FileChunk chunk = handler.get(params); |
| if (chunk == null) { |
| if (params.containsKey("qid")) { // if there is no content corresponding to the query |
| return null; |
| } else { // if there is no |
| throw new FileNotFoundException("No such a file corresponding to " + params.get("qid")); |
| } |
| } |
| |
| File file = chunk.getFile(); |
| if (file.isHidden() || !file.exists()) { |
| throw new FileNotFoundException("No such file: " + file.getAbsolutePath()); |
| } |
| if (!file.isFile()) { |
| throw new FileAccessForbiddenException(file.getAbsolutePath() + " is not file"); |
| } |
| |
| return new FileChunk[] {chunk}; |
| } |
| } |
| |
| private List<String> splitMaps(List<String> qids) { |
| if (null == qids) { |
| LOG.error("QueryId is EMPTY"); |
| return null; |
| } |
| |
| final List<String> ret = new ArrayList<String>(); |
| for (String qid : qids) { |
| Collections.addAll(ret, qid.split(",")); |
| } |
| return ret; |
| } |
| } |