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.Timespan;
  36 import jdk.jfr.internal.PlatformEventType;
  37 import jdk.jfr.internal.Control;
  38 import jdk.jfr.internal.Type;
  39 import jdk.jfr.internal.Utils;
  40 @MetadataDefinition
  41 @Label("Threshold")
  42 @Name(Type.SETTINGS_PREFIX + "Threshold")
  43 @Description("Record event with duration above or equal to threshold")
  44 @Timespan
  45 public final class ThresholdSetting extends Control {
  46     private final static long typeId = Type.getTypeId(ThresholdSetting.class);
  47     private String value = "0 ns";
  48     private final PlatformEventType eventType;
  49 
  50     public ThresholdSetting(PlatformEventType eventType, String defaultValue) {
  51        super(defaultValue);
  52        this.eventType = Objects.requireNonNull(eventType);
  53     }
  54 
  55     @Override
  56     public String combine(Set<String> values) {
  57         Long min = null;
  58         String text = null;
  59         for (String value : values) {
  60             long l = Utils.parseTimespanWithInfinity(value);
  61             // always accept first value
  62             if (min == null) {
  63                 min = l;
  64                 text = value;
  65             } else {
  66                 if (l < min) {
  67                     text = value;
  68                     min = l;
  69                 }
  70             }
  71         }
  72         return text == null ? "0 ns" : text;
  73     }
  74 
  75     @Override
  76     public void setValue(String value) {
  77         long l = Utils.parseTimespanWithInfinity(value);
  78         this.value = value;
  79         eventType.setThreshold(l);
  80     }
  81 
  82     @Override
  83     public String getValue() {
  84         return value;
  85     }
  86 
  87     public static boolean isType(long typeId) {
  88         return ThresholdSetting.typeId == typeId;
  89     }
  90 }