| /* |
| * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.jfr.internal.consumer; |
| |
| import static jdk.jfr.internal.EventInstrumentation.FIELD_DURATION; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import jdk.jfr.EventType; |
| import jdk.jfr.ValueDescriptor; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.jfr.internal.consumer.Parser; |
| import jdk.jfr.internal.consumer.RecordingInput; |
| |
| /** |
| * Parses an event and returns a {@link RecordedEvent}. |
| * |
| */ |
| final class EventParser extends Parser { |
| |
| private static final JdkJfrConsumer PRIVATE_ACCESS = JdkJfrConsumer.instance(); |
| |
| private final Parser[] parsers; |
| private final EventType eventType; |
| private final TimeConverter timeConverter; |
| private final boolean hasDuration; |
| private final List<ValueDescriptor> valueDescriptors; |
| private final int startIndex; |
| private final int length; |
| private final RecordedEvent unorderedEvent; |
| private final ObjectContext objectContext; |
| |
| private RecordedEvent[] cached; |
| private int cacheIndex; |
| |
| private boolean enabled = true; |
| private boolean ordered; |
| private long filterStart; |
| private long filterEnd = Long.MAX_VALUE; |
| private long thresholdNanos = -1; |
| |
| EventParser(TimeConverter timeConverter, EventType type, Parser[] parsers) { |
| this.timeConverter = timeConverter; |
| this.parsers = parsers; |
| this.eventType = type; |
| this.hasDuration = type.getField(FIELD_DURATION) != null; |
| this.startIndex = hasDuration ? 2 : 1; |
| this.length = parsers.length - startIndex; |
| this.valueDescriptors = type.getFields(); |
| this.objectContext = new ObjectContext(type, valueDescriptors, timeConverter); |
| this.unorderedEvent = PRIVATE_ACCESS.newRecordedEvent(objectContext, new Object[length], 0L, 0L); |
| } |
| |
| private RecordedEvent cachedEvent() { |
| if (ordered) { |
| if (cacheIndex == cached.length) { |
| RecordedEvent[] old = cached; |
| cached = new RecordedEvent[cached.length * 2]; |
| System.arraycopy(old, 0, cached, 0, old.length); |
| } |
| RecordedEvent event = cached[cacheIndex]; |
| if (event == null) { |
| event = PRIVATE_ACCESS.newRecordedEvent(objectContext, new Object[length], 0L, 0L); |
| cached[cacheIndex] = event; |
| } |
| cacheIndex++; |
| return event; |
| } else { |
| return unorderedEvent; |
| } |
| } |
| |
| public EventType getEventType() { |
| return eventType; |
| } |
| |
| public void setThresholdNanos(long thresholdNanos) { |
| this.thresholdNanos = thresholdNanos; |
| } |
| |
| public void setEnabled(boolean enabled) { |
| this.enabled = enabled; |
| } |
| |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| public RecordedEvent parse(RecordingInput input) throws IOException { |
| if (!enabled) { |
| return null; |
| } |
| |
| long startTicks = input.readLong(); |
| long endTicks = startTicks; |
| if (hasDuration) { |
| long durationTicks = input.readLong(); |
| if (thresholdNanos > 0L) { |
| if (timeConverter.convertTimespan(durationTicks) < thresholdNanos) { |
| return null; |
| } |
| } |
| endTicks += durationTicks; |
| } |
| if (filterStart != 0L || filterEnd != Long.MAX_VALUE) { |
| long eventEnd = timeConverter.convertTimestamp(endTicks); |
| if (eventEnd < filterStart) { |
| return null; |
| } |
| if (eventEnd > filterEnd) { |
| return null; |
| } |
| } |
| |
| if (cached != null) { |
| RecordedEvent event = cachedEvent(); |
| JdkJfrConsumer access = PRIVATE_ACCESS; |
| access.setStartTicks(event, startTicks); |
| access.setEndTicks(event, endTicks); |
| Object[] values = access.eventValues(event); |
| for (int i = 0; i < values.length; i++) { |
| values[i] = parsers[startIndex + i].parse(input); |
| } |
| return event; |
| } |
| |
| Object[] values = new Object[length]; |
| for (int i = 0; i < values.length; i++) { |
| values[i] = parsers[startIndex + i].parse(input); |
| } |
| return PRIVATE_ACCESS.newRecordedEvent(objectContext, values, startTicks, endTicks); |
| } |
| |
| @Override |
| public void skip(RecordingInput input) throws IOException { |
| throw new InternalError("Should not call this method. More efficent to read event size and skip ahead"); |
| } |
| |
| public void resetCache() { |
| cacheIndex = 0; |
| } |
| |
| private boolean hasReuse() { |
| return cached != null; |
| } |
| |
| public void setReuse(boolean reuse) { |
| if (reuse == hasReuse()) { |
| return; |
| } |
| if (reuse) { |
| cached = new RecordedEvent[2]; |
| cacheIndex = 0; |
| } else { |
| cached = null; |
| } |
| } |
| |
| public void setFilterStart(long filterStart) { |
| this.filterStart = filterStart; |
| } |
| |
| public void setFilterEnd(long filterEnd) { |
| this.filterEnd = filterEnd; |
| } |
| |
| public void setOrdered(boolean ordered) { |
| if (this.ordered == ordered) { |
| return; |
| } |
| this.ordered = ordered; |
| this.cacheIndex = 0; |
| } |
| } |