1 /*

     2  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.jfr.internal.settings;

    27 

    28 import java.util.Objects;

    29 import java.util.Set;

    30 

    31 import jdk.jfr.Description;

    32 import jdk.jfr.Label;

    33 import jdk.jfr.MetadataDefinition;

    34 import jdk.jfr.Name;

    35 import jdk.jfr.internal.PlatformEventType;

    36 import jdk.jfr.internal.Control;

    37 import jdk.jfr.internal.Type;

    38 import jdk.jfr.internal.Utils;

    39 

    40 @MetadataDefinition

    41 @Label("Period")

    42 @Description("Record event at interval")

    43 @Name(Type.SETTINGS_PREFIX + "Period")

    44 public final class PeriodSetting extends Control {

    45     private static final long typeId = Type.getTypeId(PeriodSetting.class);

    46 

    47     public static final String EVERY_CHUNK = "everyChunk";

    48     public static final String BEGIN_CHUNK = "beginChunk";

    49     public static final String END_CHUNK = "endChunk";

    50     public static final String NAME = "period";

    51     private final PlatformEventType eventType;

    52     private String value = EVERY_CHUNK;

    53 

    54     public PeriodSetting(PlatformEventType eventType, String defaultValue) {

    55         super(defaultValue);

    56         this.eventType = Objects.requireNonNull(eventType);

    57     }

    58 

    59     @Override

    60     public String combine(Set<String> values) {

    61         long min = Long.MAX_VALUE;

    62         boolean beginChunk = false;

    63         boolean endChunk = false;

    64         String text = EVERY_CHUNK;

    65         for (String value : values) {

    66             switch (value) {

    67             case EVERY_CHUNK:

    68                 beginChunk = true;

    69                 endChunk = true;

    70                 break;

    71             case BEGIN_CHUNK:

    72                 beginChunk = true;

    73                 break;

    74             case END_CHUNK:

    75                 endChunk = true;

    76                 break;

    77             default:

    78                 long l = Utils.parseTimespan(value);

    79                 if (l < min) {

    80                     text = value;

    81                     min = l;

    82                 }

    83             }

    84         }

    85         if (min != Long.MAX_VALUE) {

    86             return text;

    87         }

    88         if (beginChunk && !endChunk) {

    89             return BEGIN_CHUNK;

    90         }

    91         if (!beginChunk && endChunk) {

    92             return END_CHUNK;

    93         }

    94         return text;

    95     }

    96 

    97     @Override

    98     public void setValue(String value) {

    99         switch (value) {

   100         case EVERY_CHUNK:

   101             eventType.setPeriod(0, true, true);

   102             break;

   103         case BEGIN_CHUNK:

   104             eventType.setPeriod(0, true, false);

   105             break;

   106         case END_CHUNK:

   107             eventType.setPeriod(0, false, true);

   108             break;

   109         default:

   110             eventType.setPeriod(Utils.parseTimespan(value) / 1_000_000, false, false);

   111         }

   112         this.value = value;

   113     }

   114 

   115     @Override

   116     public String getValue() {

   117         return value;

   118     }

   119 

   120     public static boolean isType(long typeId) {

   121         return PeriodSetting.typeId == typeId;

   122     }

   123 }