co.cask.cdap.data.stream.service.heartbeat.StreamWriterHeartbeat.java Source code

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Here is the source code for co.cask.cdap.data.stream.service.heartbeat.StreamWriterHeartbeat.java

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/*
 * Copyright  2015 Cask Data, 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 co.cask.cdap.data.stream.service.heartbeat;

import co.cask.cdap.data.stream.service.DistributedStreamService;
import co.cask.cdap.proto.Id;
import com.google.common.base.Objects;
import com.google.common.collect.ImmutableMap;

import java.util.Map;

/**
 * Heartbeat sent by a Stream writer containing the total size of its files, in bytes. The heartbeats
 * concerning one stream are aggregated by the {@link DistributedStreamService} elected leader of the stream.
 */
public class StreamWriterHeartbeat {

    private final long timestamp;
    private final int instanceId;
    private final Map<Id.Stream, Long> streamsSizes;

    public StreamWriterHeartbeat(long timestamp, int instanceId, Map<Id.Stream, Long> streamsSizes) {
        this.timestamp = timestamp;
        this.instanceId = instanceId;
        this.streamsSizes = ImmutableMap.copyOf(streamsSizes);
    }

    public long getTimestamp() {
        return timestamp;
    }

    public int getInstanceId() {
        return instanceId;
    }

    public Map<Id.Stream, Long> getStreamsSizes() {
        return streamsSizes;
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(StreamWriterHeartbeat.class).add("timestamp", timestamp)
                .add("instanceId", instanceId).add("streamsSizes", streamsSizes).toString();
    }
}