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package jdk.jfr.consumer;
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import java.time.Instant;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.function.Consumer;
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import jdk.jfr.EventType;
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import jdk.jfr.consumer.ChunkParser.ParserConfiguration;
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import jdk.jfr.internal.LongMap;
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import jdk.jfr.internal.consumer.InternalEventFilter;
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public final class Dispatcher {
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public final static class EventDispatcher {
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final static EventDispatcher[] NO_DISPATCHERS = new EventDispatcher[0];
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final String eventName;
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final Consumer<RecordedEvent> action;
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public EventDispatcher(Consumer<RecordedEvent> action) {
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this(null, action);
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}
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public EventDispatcher(String eventName, Consumer<RecordedEvent> action) {
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this.eventName = eventName;
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this.action = action;
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}
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public void offer(RecordedEvent event) {
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action.accept(event);
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}
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public boolean accepts(EventType eventType) {
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return (eventName == null || eventType.getName().equals(eventName));
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}
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}
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final Consumer<Throwable>[] errorActions;
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final Runnable[] flushActions;
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final Runnable[] closeActions;
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final EventDispatcher[] dispatchers;
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final LongMap<EventDispatcher[]> dispatcherLookup = new LongMap<>();
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final ParserConfiguration parserConfiguration;
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final Instant startTime;
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final Instant endTime;
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final long startNanos;
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final long endNanos;
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// Cache
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private EventType cacheEventType;
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private EventDispatcher[] cacheDispatchers;
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@SuppressWarnings({"unchecked","rawtypes"})
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public Dispatcher(StreamConfiguration c) {
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this.flushActions = c.flushActions.toArray(new Runnable[0]);
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this.closeActions = c.closeActions.toArray(new Runnable[0]);
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this.errorActions = c.errorActions.toArray(new Consumer[0]);
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this.dispatchers = c.eventActions.toArray(new EventDispatcher[0]);
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this.parserConfiguration = new ParserConfiguration(0, Long.MAX_VALUE, c.reuse, c.ordered, buildFilter(dispatchers));
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this.startTime = c.startTime;
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this.endTime = c.endTime;
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this.startNanos = c.startNanos;
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this.endNanos = c.endNanos;
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}
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private static InternalEventFilter buildFilter(EventDispatcher[] dispatchers) {
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InternalEventFilter ef = new InternalEventFilter();
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for (EventDispatcher ed : dispatchers) {
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String name = ed.eventName;
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if (name == null) {
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return InternalEventFilter.ACCEPT_ALL;
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}
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ef.setThreshold(name, 0);
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}
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return ef;
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}
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protected final void dispatch(RecordedEvent event) {
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EventType type = event.getEventType();
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EventDispatcher[] dispatchers = null;
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if (type == cacheEventType) {
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dispatchers = cacheDispatchers;
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} else {
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dispatchers = dispatcherLookup.get(type.getId());
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if (dispatchers == null) {
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List<EventDispatcher> list = new ArrayList<>();
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for (EventDispatcher e : this.dispatchers) {
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if (e.accepts(type)) {
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list.add(e);
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}
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}
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dispatchers = list.isEmpty() ? EventDispatcher.NO_DISPATCHERS : list.toArray(new EventDispatcher[0]);
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dispatcherLookup.put(type.getId(), dispatchers);
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}
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cacheDispatchers = dispatchers;
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}
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for (int i = 0; i < dispatchers.length; i++) {
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try {
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dispatchers[i].offer(event);
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} catch (Exception e) {
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handleError(e);
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}
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}
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}
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public void handleError(Throwable e) {
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Consumer<?>[] consumers = this.errorActions;
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if (consumers.length == 0) {
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defaultErrorHandler(e);
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return;
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}
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for (int i = 0; i < consumers.length; i++) {
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@SuppressWarnings("unchecked")
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Consumer<Throwable> conusmer = (Consumer<Throwable>) consumers[i];
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conusmer.accept(e);
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}
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}
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public void runFlushActions() {
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Runnable[] flushActions = this.flushActions;
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for (int i = 0; i < flushActions.length; i++) {
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try {
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flushActions[i].run();
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} catch (Exception e) {
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handleError(e);
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}
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}
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}
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public void runCloseActions() {
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Runnable[] closeActions = this.closeActions;
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for (int i = 0; i < closeActions.length; i++) {
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try {
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closeActions[i].run();
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} catch (Exception e) {
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handleError(e);
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}
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}
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}
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void defaultErrorHandler(Throwable e) {
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e.printStackTrace();
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}
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}
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