76 lines
2.4 KiB
Java
76 lines
2.4 KiB
Java
/*
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* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* Event field annotation, specifies that the value is a duration.
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*
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* @since 8
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*/
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@MetadataDefinition
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@ContentType
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@Label("Timespan")
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@Description("A duration, measured in nanoseconds by default")
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@Retention(RetentionPolicy.RUNTIME)
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@Target({ ElementType.FIELD, ElementType.TYPE, ElementType.METHOD})
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public @interface Timespan {
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/**
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* Unit for ticks.
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*/
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public static final String TICKS = "TICKS";
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/**
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* Unit for seconds.
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*/
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public static final String SECONDS = "SECONDS";
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/**
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* Unit for milliseconds.
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*/
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public static final String MILLISECONDS = "MILLISECONDS";
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/**
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* Unit for nanoseconds.
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*/
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public static final String NANOSECONDS = "NANOSECONDS";
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/**
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* Unit for microseconds.
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*/
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public static final String MICROSECONDS = "MICROSECONDS";
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/**
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* Returns the unit of measure for the time span.
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* <p>
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* By default, the unit is nanoseconds.
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*
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* @return the time span unit, default {@code #NANOSECONDS}, not {@code null}
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*/
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String value() default NANOSECONDS;
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}
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