test/jdk/jdk/jfr/api/consumer/filestream/TestReuse.java
author egahlin
Fri, 31 May 2019 20:44:28 +0200
branchJEP-349-branch
changeset 57385 7d9d4f629f6e
parent 57381 ce265e404c64
permissions -rw-r--r--
Make setReuse and setOrdered work across chunk boundaries. Improved unit tests
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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.filestream;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.IdentityHashMap;
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import java.util.Map;
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import java.util.concurrent.atomic.AtomicBoolean;
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import jdk.jfr.Event;
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import jdk.jfr.Recording;
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import jdk.jfr.consumer.EventStream;
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import jdk.jfr.consumer.RecordedEvent;
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/**
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 * @test
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 * @summary Test EventStream::setReuse(...)
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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.filestream.TestReuse
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 */
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public class TestReuse {
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    static class ReuseEvent extends Event {
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    }
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    private static final boolean[] BOOLEAN_STATES = { false, true };
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    public static void main(String... args) throws Exception {
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        Path p = makeRecording();
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        testSetReuseTrue(p);
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        testSetReuseFalse(p);
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    }
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    private static void testSetReuseFalse(Path p) throws Exception {
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        for (boolean ordered : BOOLEAN_STATES) {
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            AtomicBoolean fail = new AtomicBoolean(false);
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            Map<RecordedEvent, RecordedEvent> identity = new IdentityHashMap<>();
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            try (EventStream es = EventStream.openFile(p)) {
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                es.setOrdered(ordered);
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                es.setReuse(false);
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                es.onEvent(e -> {
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                    if (identity.containsKey(e)) {
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                        fail.set(true);
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                        es.close();
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                    }
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                    identity.put(e, e);
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                });
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                es.start();
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            }
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            if (fail.get()) {
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                throw new Exception("Unexpected reuse! Ordered = " + ordered);
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            }
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        }
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    }
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    private static void testSetReuseTrue(Path p) throws Exception {
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        for (boolean ordered : BOOLEAN_STATES) {
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            AtomicBoolean success = new AtomicBoolean(false);
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            Map<RecordedEvent, RecordedEvent> events = new IdentityHashMap<>();
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            try (EventStream es = EventStream.openFile(p)) {
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                es.setOrdered(ordered);
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                es.setReuse(true);
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                es.onEvent(e -> {
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                    if(events.containsKey(e)) {
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                        success.set(true);;
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                        es.close();
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                    }
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                    events.put(e,e);
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                });
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                es.start();
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            }
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            if (!success.get()) {
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                throw new Exception("No reuse! Ordered = " + ordered);
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            }
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        }
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    }
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    private static Path makeRecording() throws IOException {
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        try (Recording r = new Recording()) {
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            r.start();
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            for (int i = 0; i < 5; i++) {
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                ReuseEvent e = new ReuseEvent();
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                e.commit();
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            }
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            Recording rotation = new Recording();
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            rotation.start();
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            for (int i = 0; i < 5; i++) {
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                ReuseEvent e = new ReuseEvent();
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                e.commit();
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            }
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            r.stop();
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            rotation.close();
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            Path p = Files.createTempFile("recording", ".jfr");
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            r.dump(p);
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            return p;
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        }
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    }
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}