| /** |
| * 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.tez.runtime.api.impl; |
| |
| |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Objects; |
| |
| import javax.annotation.Nullable; |
| |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.util.StringInterner; |
| import org.apache.tez.dag.records.TezTaskAttemptID; |
| |
| /** |
| * Class that encapsulates all the information to identify the unique |
| * object that either generated an Event or is the recipient of an Event. |
| */ |
| public class EventMetaData implements Writable { |
| |
| public static enum EventProducerConsumerType { |
| INPUT, |
| PROCESSOR, |
| OUTPUT, |
| SYSTEM |
| } |
| |
| /** |
| * Producer Type ( one of Input/Output/Processor ) that generated the Event |
| * or Consumer Type that will consume the Event. |
| */ |
| private EventProducerConsumerType producerConsumerType; |
| |
| /** |
| * Name of the vertex where the event was generated. |
| */ |
| private String taskVertexName; |
| |
| /** |
| * Name of the vertex to which the Input or Output is connected to. |
| */ |
| private String edgeVertexName; |
| |
| /** |
| * Task Attempt ID |
| */ |
| private TezTaskAttemptID taskAttemptID; |
| |
| public EventMetaData() { |
| } |
| |
| public EventMetaData(EventProducerConsumerType generator, |
| String taskVertexName, @Nullable String edgeVertexName, |
| @Nullable TezTaskAttemptID taskAttemptID) { |
| Objects.requireNonNull(generator, "generator is null"); |
| Objects.requireNonNull(taskVertexName, "taskVertexName is null"); |
| this.producerConsumerType = generator; |
| this.taskVertexName = StringInterner.weakIntern(taskVertexName); |
| this.edgeVertexName = StringInterner.weakIntern(edgeVertexName); |
| this.taskAttemptID = taskAttemptID; |
| } |
| |
| public EventProducerConsumerType getEventGenerator() { |
| return producerConsumerType; |
| } |
| |
| public TezTaskAttemptID getTaskAttemptID() { |
| return taskAttemptID; |
| } |
| |
| public String getTaskVertexName() { |
| return taskVertexName; |
| } |
| |
| public String getEdgeVertexName() { |
| return edgeVertexName; |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| out.writeInt(producerConsumerType.ordinal()); |
| if (taskVertexName != null) { |
| out.writeBoolean(true); |
| out.writeUTF(taskVertexName); |
| } else { |
| out.writeBoolean(false); |
| } |
| if (edgeVertexName != null) { |
| out.writeBoolean(true); |
| out.writeUTF(edgeVertexName); |
| } else { |
| out.writeBoolean(false); |
| } |
| if(taskAttemptID != null) { |
| out.writeBoolean(true); |
| taskAttemptID.write(out); |
| } else { |
| out.writeBoolean(false); |
| } |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| producerConsumerType = EventProducerConsumerType.values()[in.readInt()]; |
| if (in.readBoolean()) { |
| taskVertexName = StringInterner.weakIntern(in.readUTF()); |
| } |
| if (in.readBoolean()) { |
| edgeVertexName = StringInterner.weakIntern(in.readUTF()); |
| } |
| if (in.readBoolean()) { |
| taskAttemptID = TezTaskAttemptID.readTezTaskAttemptID(in); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "{ producerConsumerType=" + producerConsumerType |
| + ", taskVertexName=" + taskVertexName |
| + ", edgeVertexName=" + edgeVertexName |
| + ", taskAttemptId=" + (taskAttemptID == null? "null" : taskAttemptID) |
| + " }"; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result |
| + ((edgeVertexName == null) ? 0 : edgeVertexName.hashCode()); |
| result = prime |
| * result |
| + ((producerConsumerType == null) ? 0 : producerConsumerType.hashCode()); |
| result = prime * result |
| + ((taskAttemptID == null) ? 0 : taskAttemptID.hashCode()); |
| result = prime * result |
| + ((taskVertexName == null) ? 0 : taskVertexName.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| EventMetaData other = (EventMetaData) obj; |
| if (edgeVertexName == null) { |
| if (other.edgeVertexName != null) |
| return false; |
| } else if (!edgeVertexName.equals(other.edgeVertexName)) |
| return false; |
| if (producerConsumerType != other.producerConsumerType) |
| return false; |
| if (taskAttemptID == null) { |
| if (other.taskAttemptID != null) |
| return false; |
| } else if (!taskAttemptID.equals(other.taskAttemptID)) |
| return false; |
| if (taskVertexName == null) { |
| if (other.taskVertexName != null) |
| return false; |
| } else if (!taskVertexName.equals(other.taskVertexName)) |
| return false; |
| return true; |
| } |
| |
| } |