DruidThroughput.java Source code

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Here is the source code for 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.
 */
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
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;

public class DruidThroughput {
    private DruidThroughput() {
    }

    private static final String[] QUERIES = { "SELECT SUM(l_extendedprice), SUM(l_discount) FROM tpch_lineitem",
            "SELECT SUM(l_extendedprice) FROM tpch_lineitem WHERE l_returnflag = 'R'",
            "SELECT SUM(l_extendedprice) FROM tpch_lineitem WHERE l_shipdate BETWEEN '1996-12-01' AND '1996-12-31'",
            "SELECT SUM(l_extendedprice) FROM tpch_lineitem GROUP BY l_shipdate",
            "SELECT SUM(l_extendedprice), SUM(l_quantity) FROM tpch_lineitem GROUP BY l_shipdate",
            "SELECT SUM(l_extendedprice) FROM tpch_lineitem WHERE l_shipdate BETWEEN '1995-01-01' AND '1996-12-31' GROUP BY l_shipdate",
            "SELECT SUM(l_extendedprice) FROM tpch_lineitem WHERE l_shipmode in ('RAIL', 'FOB') AND l_receiptdate BETWEEN '1997-01-01' AND '1997-12-31' GROUP BY l_shipmode" };
    private static final String QUERY_FILE_DIR = "druid_queries";
    private static final int MILLIS_PER_SECOND = 1000;
    private static final long RANDOM_SEED = 123456789L;
    private static final int NUM_CLIENTS = 10;
    private static final int REPORT_INTERVAL_MILLIS = 3000;

    private static final char[] BUFFER = new char[4096];

    @SuppressWarnings("InfiniteLoopStatement")
    public static void main(String[] args) throws Exception {
        final int numQueries = QUERIES.length;
        final Random random = new Random(RANDOM_SEED);
        final AtomicInteger counter = new AtomicInteger(0);
        final AtomicLong totalResponseTime = new AtomicLong(0L);
        final ExecutorService executorService = Executors.newFixedThreadPool(NUM_CLIENTS);

        for (int i = 0; i < NUM_CLIENTS; i++) {
            executorService.submit(new Runnable() {
                @Override
                public void run() {
                    try (CloseableHttpClient client = HttpClients.createDefault()) {
                        HttpPost post = new HttpPost("http://localhost:8082/druid/v2/?pretty");
                        post.addHeader("content-type", "application/json");
                        CloseableHttpResponse res;
                        while (true) {
                            try (BufferedReader reader = new BufferedReader(new FileReader(
                                    QUERY_FILE_DIR + File.separator + random.nextInt(numQueries) + ".json"))) {
                                int length = reader.read(BUFFER);
                                post.setEntity(new StringEntity(new String(BUFFER, 0, length)));
                            }
                            long start = System.currentTimeMillis();
                            res = client.execute(post);
                            res.close();
                            counter.getAndIncrement();
                            totalResponseTime.getAndAdd(System.currentTimeMillis() - start);
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            });
        }

        long startTime = System.currentTimeMillis();
        while (true) {
            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");
        }
    }
}