test/jdk/jdk/jfr/api/consumer/streaming/TestFilledChunks.java
author egahlin
Wed, 23 Oct 2019 15:01:32 +0200
branchJEP-349-branch
changeset 58755 ac3504a5597c
parent 58076 ca625d28c580
permissions -rw-r--r--
Improve TestFilledChunks.java
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/*
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 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package jdk.jfr.api.consumer.streaming;
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import java.util.Random;
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import jdk.jfr.Event;
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import jdk.jfr.consumer.RecordingStream;
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/**
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 * @test
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 * @summary Test that it is possible to iterate over chunk with normal events
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 * @key jfr
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 * @requires vm.hasJFR
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 * @library /test/lib
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 * @run main/othervm jdk.jfr.api.consumer.streaming.TestFilledChunks
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 */
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public class TestFilledChunks {
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    static class FillEvent extends Event {
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        String message;
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        int value;
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        int id;
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    }
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    static class EndEvent extends Event {
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    }
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    // Will generate about 100 MB of data, or 8-9 chunks
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    private static final int EVENT_COUNT = 5_000_000;
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    public static void main(String... args) throws Exception {
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        try (RecordingStream rs = new RecordingStream()) {
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            rs.onEvent(FillEvent.class.getName(), e -> {
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                int id = e.getInt("id");
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                // Some events may get lost due to
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                // buffer being full.
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                if (id > EVENT_COUNT / 2) {
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                    rs.close();
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                }
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            });
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            rs.startAsync();
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            long seed = System.currentTimeMillis();
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            System.out.println("Random seed: " + seed);
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            Random r = new Random(seed);
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            for (int i = 1; i < EVENT_COUNT; i++) {
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                FillEvent f = new FillEvent();
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                f.message = i % 2 == 0 ? "hello, hello, hello, hello, hello!" : "hi!";
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                f.value = r.nextInt(10000);
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                f.id = i;
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                f.commit();
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                if (i % 1_000_000 == 0) {
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                    System.out.println("Emitted " + i + " events");
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                }
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            }
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            rs.awaitTermination();
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        }
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    }
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}