| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.tez.history.parser; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.tez.common.Preconditions; |
| import org.apache.tez.dag.api.TezConfiguration; |
| import org.apache.tez.dag.api.TezException; |
| import org.apache.tez.dag.history.logging.proto.HistoryEventProtoJsonConversion; |
| import org.apache.tez.dag.history.logging.proto.HistoryLoggerProtos.HistoryEventProto; |
| import org.apache.tez.dag.history.logging.proto.ProtoMessageReader; |
| import org.apache.tez.history.parser.datamodel.DagInfo; |
| import org.codehaus.jettison.json.JSONException; |
| import org.codehaus.jettison.json.JSONObject; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.Strings; |
| |
| /** |
| * Parser utility to parse data generated by ProtoHistoryLoggingService. |
| */ |
| public class ProtoHistoryParser extends SimpleHistoryParser { |
| private static final Logger LOG = LoggerFactory.getLogger(ProtoHistoryParser.class); |
| private List<File> protoFiles; |
| |
| public ProtoHistoryParser(List<File> files) { |
| super(files); |
| this.protoFiles = files; |
| } |
| |
| /** |
| * Get in-memory representation of DagInfo. |
| * |
| * @return DagInfo |
| * @throws TezException |
| */ |
| public DagInfo getDAGData(String dagId) throws TezException { |
| try { |
| Preconditions.checkArgument(!Strings.isNullOrEmpty(dagId), "Please provide valid dagId"); |
| dagId = dagId.trim(); |
| parseContents(dagId); |
| linkParsedContents(); |
| addRawDataToDagInfo(); |
| return dagInfo; |
| } catch (IOException | JSONException e) { |
| LOG.error("Error in reading DAG ", e); |
| throw new TezException(e); |
| } |
| } |
| |
| private void parseContents(String dagId) |
| throws JSONException, FileNotFoundException, TezException, IOException { |
| JSONObjectSource source = getJsonSource(); |
| parse(dagId, source); |
| } |
| |
| private JSONObjectSource getJsonSource() throws IOException { |
| final TezConfiguration conf = new TezConfiguration(); |
| |
| Iterator<File> fileIt = protoFiles.iterator(); |
| |
| JSONObjectSource source = new JSONObjectSource() { |
| private HistoryEventProto message = null; |
| private ProtoMessageReader<HistoryEventProto> reader = new ProtoMessageReader<>(conf, |
| new Path(fileIt.next().getPath()), HistoryEventProto.PARSER); |
| |
| @Override |
| public JSONObject next() throws JSONException { |
| return HistoryEventProtoJsonConversion.convertToJson(message); |
| } |
| |
| @Override |
| public boolean hasNext() throws IOException { |
| try { |
| message = (HistoryEventProto) reader.readEvent(); |
| return message != null; |
| } catch (java.io.EOFException e) { |
| reader.close(); |
| if (!fileIt.hasNext()) { |
| return false; |
| } else { |
| reader = new ProtoMessageReader<>(conf, new Path(fileIt.next().getPath()), |
| HistoryEventProto.PARSER); |
| try { |
| message = (HistoryEventProto) reader.readEvent(); |
| return message != null; |
| } catch (java.io.EOFException e2) { |
| return false; |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void close() { |
| try { |
| reader.close(); |
| } catch (IOException e) { |
| LOG.warn("error while closing ProtoMessageReader", e); |
| } |
| } |
| }; |
| return source; |
| } |
| } |