com.linkedin.pinotdruidbenchmark.DruidThroughput.java Source code

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Here is the source code for com.linkedin.pinotdruidbenchmark.DruidThroughput.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * 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.linkedin.pinotdruidbenchmark;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Arrays;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

/**
 * Test throughput for Druid.
 */
public class DruidThroughput {
    private DruidThroughput() {
    }

    private static final long RANDOM_SEED = 123456789L;
    private static final Random RANDOM = new Random(RANDOM_SEED);
    private static final char[] CHAR_BUFFER = new char[4096];

    private static final int MILLIS_PER_SECOND = 1000;
    private static final int REPORT_INTERVAL_MILLIS = 3000;

    @SuppressWarnings("InfiniteLoopStatement")
    public static void main(String[] args) throws Exception {
        if (args.length != 3 && args.length != 4) {
            System.err.println(
                    "3 or 4 arguments required: QUERY_DIR, RESOURCE_URL, NUM_CLIENTS, TEST_TIME (seconds).");
            return;
        }

        File queryDir = new File(args[0]);
        String resourceUrl = args[1];
        final int numClients = Integer.parseInt(args[2]);
        final long endTime;
        if (args.length == 3) {
            endTime = Long.MAX_VALUE;
        } else {
            endTime = System.currentTimeMillis() + Integer.parseInt(args[3]) * MILLIS_PER_SECOND;
        }

        File[] queryFiles = queryDir.listFiles();
        assert queryFiles != null;
        Arrays.sort(queryFiles);

        final int numQueries = queryFiles.length;
        final HttpPost[] httpPosts = new HttpPost[numQueries];
        for (int i = 0; i < numQueries; i++) {
            HttpPost httpPost = new HttpPost(resourceUrl);
            httpPost.addHeader("content-type", "application/json");
            StringBuilder stringBuilder = new StringBuilder();
            try (BufferedReader bufferedReader = new BufferedReader(new FileReader(queryFiles[i]))) {
                int length;
                while ((length = bufferedReader.read(CHAR_BUFFER)) > 0) {
                    stringBuilder.append(new String(CHAR_BUFFER, 0, length));
                }
            }
            String query = stringBuilder.toString();
            httpPost.setEntity(new StringEntity(query));
            httpPosts[i] = httpPost;
        }

        final AtomicInteger counter = new AtomicInteger(0);
        final AtomicLong totalResponseTime = new AtomicLong(0L);
        final ExecutorService executorService = Executors.newFixedThreadPool(numClients);

        for (int i = 0; i < numClients; i++) {
            executorService.submit(new Runnable() {
                @Override
                public void run() {
                    try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
                        while (System.currentTimeMillis() < endTime) {
                            long startTime = System.currentTimeMillis();
                            CloseableHttpResponse httpResponse = httpClient
                                    .execute(httpPosts[RANDOM.nextInt(numQueries)]);
                            httpResponse.close();
                            long responseTime = System.currentTimeMillis() - startTime;
                            counter.getAndIncrement();
                            totalResponseTime.getAndAdd(responseTime);
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            });
        }
        executorService.shutdown();

        long startTime = System.currentTimeMillis();
        while (System.currentTimeMillis() < endTime) {
            Thread.sleep(REPORT_INTERVAL_MILLIS);
            double timePassedSeconds = ((double) (System.currentTimeMillis() - startTime)) / MILLIS_PER_SECOND;
            int count = counter.get();
            double avgResponseTime = ((double) totalResponseTime.get()) / count;
            System.out.println("Time Passed: " + timePassedSeconds + "s, Query Executed: " + count + ", QPS: "
                    + count / timePassedSeconds + ", Avg Response Time: " + avgResponseTime + "ms");
        }
    }
}