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