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("com.oracle.jfr.settings.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 }