com.google.pubsub.clients.experimental.CPSPublisherTask.java Source code

Introduction

Here is the source code for com.google.pubsub.clients.experimental.CPSPublisherTask.java

Source

// Copyright 2016 Google 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 com.google.pubsub.clients.experimental;

import com.beust.jcommander.JCommander;
import com.google.cloud.pubsub.Publisher;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.protobuf.ByteString;
import com.google.protobuf.util.Durations;
import com.google.pubsub.clients.common.LoadTestRunner;
import com.google.pubsub.clients.common.MetricsHandler;
import com.google.pubsub.clients.common.Task;
import com.google.pubsub.clients.common.Task.RunResult;
import com.google.pubsub.flic.common.LoadtestProto.StartRequest;
import com.google.pubsub.v1.PubsubMessage;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;
import org.joda.time.Duration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/** Runs a task that publishes messages to a Cloud Pub/Sub topic. */
class CPSPublisherTask extends Task {
    private static final Logger log = LoggerFactory.getLogger(CPSPublisherTask.class);
    private Publisher publisher;
    private final int batchSize;
    private final ByteString payload;
    private final Integer id;
    private final AtomicInteger sequenceNumber = new AtomicInteger(0);

    private CPSPublisherTask(StartRequest request) {
        super(request, "experimental", MetricsHandler.MetricName.PUBLISH_ACK_LATENCY);
        this.batchSize = request.getPublishBatchSize();
        this.id = (new Random()).nextInt();
        try {
            this.publisher = Publisher.Builder
                    .newBuilder("projects/" + request.getProject() + "/topics/" + request.getTopic())
                    .setMaxBatchDuration(Duration.millis(Durations.toMillis(request.getPublishBatchDuration())))
                    .setMaxBatchBytes(9500000).setMaxBatchMessages(950).setMaxOutstandingBytes(1000000000) // 1 GB
                    .build();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        this.payload = ByteString.copyFromUtf8(LoadTestRunner.createMessage(request.getMessageSize()));
    }

    public static void main(String[] args) throws Exception {
        LoadTestRunner.Options options = new LoadTestRunner.Options();
        new JCommander(options, args);
        LoadTestRunner.run(options, CPSPublisherTask::new);
    }

    @Override
    public ListenableFuture<RunResult> doRun() {
        try {
            List<ListenableFuture<String>> results = new ArrayList<>();
            String sendTime = String.valueOf(System.currentTimeMillis());
            for (int i = 0; i < batchSize; i++) {
                results.add(publisher.publish(PubsubMessage.newBuilder().setData(payload)
                        .putAttributes("sendTime", sendTime).putAttributes("clientId", id.toString())
                        .putAttributes("sequenceNumber", Integer.toString(sequenceNumber.getAndIncrement()))
                        .build()));
            }
            return Futures.transform(Futures.allAsList(results), response -> RunResult.fromBatchSize(batchSize));
        } catch (Throwable t) {
            log.error("Flow control error.", t);
            return Futures.immediateFailedFuture(t);
        }
    }

    @Override
    protected void shutdown() {
        publisher.shutdown();
    }
}