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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package jdk.jfr.internal.consumer;

import java.io.IOException;
import java.nio.file.Path;
import java.security.AccessControlContext;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Objects;

import jdk.jfr.consumer.RecordedEvent;

Implementation of an event stream that operates against a recording file.
/** * Implementation of an event stream that operates against a recording file. * */
public final class EventFileStream extends AbstractEventStream { private final static Comparator<? super RecordedEvent> EVENT_COMPARATOR = JdkJfrConsumer.instance().eventComparator(); private final RecordingInput input; private ChunkParser currentParser; private RecordedEvent[] cacheSorted; public EventFileStream(AccessControlContext acc, Path path) throws IOException { super(acc, null); Objects.requireNonNull(path); this.input = new RecordingInput(path.toFile(), FileAccess.UNPRIVILEGED); } @Override public void start() { start(0); } @Override public void startAsync() { startAsync(0); } @Override public void close() { setClosed(true); dispatcher().runCloseActions(); try { input.close(); } catch (IOException e) { // ignore } } @Override protected void process() throws IOException { Dispatcher disp = dispatcher(); long start = 0; long end = Long.MAX_VALUE; if (disp.startTime != null) { start = disp.startNanos; } if (disp.endTime != null) { end = disp.endNanos; } currentParser = new ChunkParser(input, disp.parserConfiguration); while (!isClosed()) { if (currentParser.getStartNanos() > end) { close(); return; } disp = dispatcher(); disp.parserConfiguration.filterStart = start; disp.parserConfiguration.filterEnd = end; currentParser.updateConfiguration(disp.parserConfiguration, true); currentParser.setFlushOperation(getFlushOperation()); if (disp.parserConfiguration.isOrdered()) { processOrdered(disp); } else { processUnordered(disp); } if (isClosed() || currentParser.isLastChunk()) { return; } currentParser = currentParser.nextChunkParser(); } } private void processOrdered(Dispatcher c) throws IOException { if (cacheSorted == null) { cacheSorted = new RecordedEvent[10_000]; } RecordedEvent event; int index = 0; while (true) { event = currentParser.readEvent(); if (event == null) { Arrays.sort(cacheSorted, 0, index, EVENT_COMPARATOR); for (int i = 0; i < index; i++) { c.dispatch(cacheSorted[i]); } return; } if (index == cacheSorted.length) { RecordedEvent[] tmp = cacheSorted; cacheSorted = new RecordedEvent[2 * tmp.length]; System.arraycopy(tmp, 0, cacheSorted, 0, tmp.length); } cacheSorted[index++] = event; } } private void processUnordered(Dispatcher c) throws IOException { while (!isClosed()) { RecordedEvent event = currentParser.readEvent(); if (event == null) { return; } c.dispatch(event); } } }