org.apache.tez.runtime.api.impl.TezHeartbeatRequest.java Source code

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Here is the source code for org.apache.tez.runtime.api.impl.TezHeartbeatRequest.java

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/**
 * 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.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.tez.dag.records.TezTaskAttemptID;

public class TezHeartbeatRequest implements Writable {

    private String containerIdentifier;
    private List<TezEvent> events;
    private TezTaskAttemptID currentTaskAttemptID;
    private int startIndex;
    private int maxEvents;
    private long requestId;

    public TezHeartbeatRequest() {
    }

    public TezHeartbeatRequest(long requestId, List<TezEvent> events, String containerIdentifier,
            TezTaskAttemptID taskAttemptID, int startIndex, int maxEvents) {
        this.containerIdentifier = containerIdentifier;
        this.requestId = requestId;
        this.events = Collections.unmodifiableList(events);
        this.startIndex = startIndex;
        this.maxEvents = maxEvents;
        this.currentTaskAttemptID = taskAttemptID;
    }

    public String getContainerIdentifier() {
        return containerIdentifier;
    }

    public List<TezEvent> getEvents() {
        return events;
    }

    public int getStartIndex() {
        return startIndex;
    }

    public int getMaxEvents() {
        return maxEvents;
    }

    public long getRequestId() {
        return requestId;
    }

    public TezTaskAttemptID getCurrentTaskAttemptID() {
        return currentTaskAttemptID;
    }

    @Override
    public void write(DataOutput out) throws IOException {
        if (events != null) {
            out.writeBoolean(true);
            out.writeInt(events.size());
            for (TezEvent e : events) {
                e.write(out);
            }
        } else {
            out.writeBoolean(false);
        }
        if (currentTaskAttemptID != null) {
            out.writeBoolean(true);
            currentTaskAttemptID.write(out);
        } else {
            out.writeBoolean(false);
        }
        out.writeInt(startIndex);
        out.writeInt(maxEvents);
        out.writeLong(requestId);
        Text.writeString(out, containerIdentifier);
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        if (in.readBoolean()) {
            int eventsCount = in.readInt();
            events = new ArrayList<TezEvent>(eventsCount);
            for (int i = 0; i < eventsCount; ++i) {
                TezEvent e = new TezEvent();
                e.readFields(in);
                events.add(e);
            }
        }
        if (in.readBoolean()) {
            currentTaskAttemptID = TezTaskAttemptID.readTezTaskAttemptID(in);
        } else {
            currentTaskAttemptID = null;
        }
        startIndex = in.readInt();
        maxEvents = in.readInt();
        requestId = in.readLong();
        containerIdentifier = Text.readString(in);
    }

    @Override
    public String toString() {
        return "{ " + " containerId=" + containerIdentifier + ", requestId=" + requestId + ", startIndex="
                + startIndex + ", maxEventsToGet=" + maxEvents + ", taskAttemptId=" + currentTaskAttemptID
                + ", eventCount=" + (events != null ? events.size() : 0) + " }";
    }
}