author | egahlin |
Thu, 30 May 2019 23:04:50 +0200 | |
branch | JEP-349-branch |
changeset 57380 | 6a7e7743b82f |
parent 57376 | 8e8a06a3059c |
child 57385 | 7d9d4f629f6e |
permissions | -rw-r--r-- |
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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.consumer; |
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import java.io.IOException; |
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import java.nio.file.Path; |
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import java.security.AccessControlContext; |
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import java.security.AccessController; |
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import java.time.Duration; |
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import java.util.Arrays; |
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import java.util.Comparator; |
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import java.util.Objects; |
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import java.util.function.Consumer; |
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import jdk.jfr.internal.consumer.EventConsumer; |
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import jdk.jfr.internal.consumer.RecordingInput; |
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/** |
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* Implementation of an event stream that operates against a recording file. |
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* |
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*/ |
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final class EventFileStream implements EventStream { |
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private final static class FileEventConsumer extends EventConsumer { |
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private static final Comparator<? super RecordedEvent> END_TIME = (e1, e2) -> Long.compare(e1.endTime, e2.endTime); |
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private static final int DEFAULT_ARRAY_SIZE = 100_000; |
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private final RecordingInput input; |
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private ChunkParser chunkParser; |
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private boolean reuse = true; |
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private RecordedEvent[] sortedList; |
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private boolean ordered; |
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private boolean finished; |
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public FileEventConsumer(AccessControlContext acc, RecordingInput input) throws IOException { |
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super(acc); |
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this.input = input; |
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} |
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@Override |
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public void process() throws Exception { |
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chunkParser = new ChunkParser(input, reuse); |
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while (!isClosed() && !finished) { |
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boolean reuse = this.reuse; |
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boolean ordered = this.ordered; |
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chunkParser.setReuse(reuse); |
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chunkParser.setOrdered(ordered); |
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chunkParser.resetEventCache(); |
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chunkParser.updateEventParsers(); |
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if (ordered) { |
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processOrdered(); |
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} else { |
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processUnordered(); |
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} |
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} |
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} |
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private void processOrdered() throws IOException { |
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if (sortedList == null) { |
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sortedList = new RecordedEvent[DEFAULT_ARRAY_SIZE]; |
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} |
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RecordedEvent event; |
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int index = 0; |
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while (true) { |
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event = chunkParser.readEvent(); |
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if (event == null) { |
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Arrays.sort(sortedList, 0, index, END_TIME); |
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for (int i = 0; i < index; i++) { |
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dispatch(sortedList[i]); |
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} |
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event = findNext(); |
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if (event == null) { |
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finished = true; |
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return; |
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} |
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} |
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if (index == sortedList.length) { |
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RecordedEvent[] tmp = sortedList; |
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sortedList = new RecordedEvent[2 * tmp.length]; |
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System.arraycopy(tmp, 0, sortedList, 0, tmp.length); |
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} |
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sortedList[index++] = event; |
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} |
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} |
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private void processUnordered() throws IOException { |
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RecordedEvent event; |
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while (!isClosed()) { |
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event = chunkParser.readEvent(); |
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if (event == null) { |
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event = findNext(); |
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if (event == null) { |
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finished = true; |
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return; |
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} |
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} |
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dispatch(event); |
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} |
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} |
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private RecordedEvent findNext() throws IOException { |
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RecordedEvent event = null; |
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while (event == null) { |
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if (chunkParser.isLastChunk()) { |
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return null; |
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} |
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chunkParser = chunkParser.nextChunkParser(); |
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event = chunkParser.readEvent(); |
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} |
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return event; |
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} |
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public void setReuse(boolean reuse) { |
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this.reuse = reuse; |
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} |
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public void setOrdered(boolean ordered) { |
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this.ordered = ordered; |
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} |
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} |
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private final RecordingInput input; |
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private final FileEventConsumer eventConsumer; |
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public EventFileStream(Path path) throws IOException { |
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Objects.requireNonNull(path); |
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input = new RecordingInput(path.toFile()); |
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eventConsumer = new FileEventConsumer(AccessController.getContext(), input); |
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} |
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@Override |
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public void onEvent(Consumer<RecordedEvent> action) { |
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Objects.requireNonNull(action); |
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eventConsumer.onEvent(action); |
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} |
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@Override |
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public void onEvent(String eventName, Consumer<RecordedEvent> action) { |
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Objects.requireNonNull(eventName); |
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Objects.requireNonNull(action); |
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eventConsumer.onEvent(eventName, action); |
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} |
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@Override |
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public void onFlush(Runnable action) { |
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Objects.requireNonNull(action); |
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eventConsumer.onFlush(action); |
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} |
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@Override |
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public void onClose(Runnable action) { |
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Objects.requireNonNull(action); |
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eventConsumer.addCloseAction(action); |
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} |
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@Override |
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public void close() { |
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eventConsumer.setClosed(true); |
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eventConsumer.runCloseActions(); |
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try { |
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input.close(); |
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} catch (IOException e) { |
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// ignore |
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} |
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} |
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@Override |
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public boolean remove(Object action) { |
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Objects.requireNonNull(action); |
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return eventConsumer.remove(action); |
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} |
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@Override |
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public void start() { |
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eventConsumer.start(0); |
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} |
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public void setReuse(boolean reuse) { |
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eventConsumer.setReuse(reuse); |
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} |
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@Override |
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public void startAsync() { |
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eventConsumer.startAsync(0); |
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} |
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@Override |
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public void awaitTermination(Duration timeout) { |
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Objects.requireNonNull(timeout); |
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eventConsumer.awaitTermination(timeout); |
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} |
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@Override |
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public void awaitTermination() { |
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eventConsumer.awaitTermination(); |
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} |
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@Override |
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public void setOrdered(boolean ordered) { |
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eventConsumer.setOrdered(ordered); |
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} |
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} |