src/jdk.jfr/share/classes/jdk/jfr/consumer/EventParser.java
author egahlin
Fri, 17 May 2019 16:02:27 +0200
branchJEP-349-branch
changeset 57360 5d043a159d5c
parent 50113 caf115bb98ad
child 57376 8e8a06a3059c
permissions -rw-r--r--
Preview
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     1
/*
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
     2
 * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     4
 *
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     7
 * published by the Free Software Foundation.  Oracle designates this
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     8
 * particular file as subject to the "Classpath" exception as provided
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
     9
 * by Oracle in the LICENSE file that accompanied this code.
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    10
 *
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    11
 * This code is distributed in the hope that it will be useful, but WITHOUT
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    12
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    13
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    14
 * version 2 for more details (a copy is included in the LICENSE file that
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    15
 * accompanied this code).
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    16
 *
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    17
 * You should have received a copy of the GNU General Public License version
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    18
 * 2 along with this work; if not, write to the Free Software Foundation,
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    19
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    20
 *
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    21
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    22
 * or visit www.oracle.com if you need additional information or have any
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    23
 * questions.
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    24
 */
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    25
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    26
package jdk.jfr.consumer;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    27
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    28
import static jdk.jfr.internal.EventInstrumentation.FIELD_DURATION;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    29
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    30
import java.io.IOException;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    31
import java.util.List;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    32
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    33
import jdk.jfr.EventType;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    34
import jdk.jfr.ValueDescriptor;
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    35
import jdk.jfr.internal.consumer.Parser;
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    36
import jdk.jfr.internal.consumer.RecordingInput;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    37
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    38
/**
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    39
 * Parses an event and returns a {@link RecordedEvent}.
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    40
 *
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    41
 */
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    42
final class EventParser extends Parser {
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    43
    private final Parser[] parsers;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    44
    private final EventType eventType;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    45
    private final TimeConverter timeConverter;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    46
    private final boolean hasDuration;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    47
    private final List<ValueDescriptor> valueDescriptors;
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    48
    private final int startIndex;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    49
    private long thresholdTicks = -1;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    50
    private boolean enabled = true;
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    51
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    52
    EventParser(TimeConverter timeConverter, EventType type, Parser[] parsers) {
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    53
        this.timeConverter = timeConverter;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    54
        this.parsers = parsers;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    55
        this.eventType = type;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    56
        this.hasDuration = type.getField(FIELD_DURATION) != null;
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    57
        this.startIndex = hasDuration ? 2 : 1;
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    58
        this.valueDescriptors = type.getFields();
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    59
    }
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
    60
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    61
    public EventType getEventType() {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    62
        return eventType;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    63
    }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    64
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    65
    public void setThreshold(long thresholdTicks) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    66
        this.thresholdTicks = thresholdTicks;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    67
    }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    68
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    69
    public void setEnabled(boolean enabled) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    70
        this.enabled = enabled;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    71
    }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    72
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    73
    public boolean isEnabled() {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    74
        return this.enabled;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    75
    }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    76
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    77
    public RecordedEvent parse(RecordingInput input) throws IOException {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    78
        if (enabled) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    79
            long startTicks = input.readLong();
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    80
            long durationTicks = 0;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    81
            if (hasDuration) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    82
                durationTicks = input.readLong();
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    83
                if (durationTicks < thresholdTicks) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    84
                    return null;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    85
                }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    86
            }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    87
            Object[] values = new Object[parsers.length];
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    88
            for (int i = startIndex; i < parsers.length; i++) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    89
                values[i] = parsers[i].parse(input);
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    90
            }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    91
            values[0] = startTicks;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    92
            if (hasDuration) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    93
                values[1] = Long.valueOf(durationTicks);
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    94
            }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    95
            long startTime = timeConverter.convertTimestamp(startTicks);
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    96
            if (hasDuration) {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    97
                long endTime = timeConverter.convertTimestamp(startTicks + durationTicks);
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    98
                return new RecordedEvent(eventType, valueDescriptors, values, startTime, endTime, timeConverter);
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
    99
            } else {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   100
                return new RecordedEvent(eventType, valueDescriptors, values, startTime, startTime, timeConverter);
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   101
            }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   102
        }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   103
        return null;
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   104
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   105
    }
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   106
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
   107
    @Override
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   108
    public void skip(RecordingInput input) throws IOException {
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   109
        throw new InternalError("Should not call this method. More efficent to read event size and skip ahead");
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
   110
    }
57360
5d043a159d5c Preview
egahlin
parents: 50113
diff changeset
   111
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents:
diff changeset
   112
}