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Diffstat (limited to 'kamon-annotation/src/main/java/kamon/annotation/Time.java')
-rw-r--r-- | kamon-annotation/src/main/java/kamon/annotation/Time.java | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/kamon-annotation/src/main/java/kamon/annotation/Time.java b/kamon-annotation/src/main/java/kamon/annotation/Time.java new file mode 100644 index 00000000..a8e3a62c --- /dev/null +++ b/kamon-annotation/src/main/java/kamon/annotation/Time.java @@ -0,0 +1,57 @@ +/* + * ========================================================================================= + * Copyright © 2013-2015 the kamon project <http://kamon.io/> + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the + * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, + * either express or implied. See the License for the specific language governing permissions + * and limitations under the License. + * ========================================================================================= + */ + +package kamon.annotation; + + +import java.lang.annotation.ElementType; +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; +import java.lang.annotation.Target; + + +/** + * A marker annotation to define a method as a timed. + * <p> + * <p> + * Given a method like this: + * <pre><code> + * {@literal @}Timed(name = "coolName", tags="""${{'my-cool-tag':'my-cool-value'}}""") + * public String coolName(String name) { + * return "Hello " + name; + * } + * </code></pre> + * <p> + * <p> + * A histogram for the defining method with the name {@code coolName} will be created and each time the + * {@code #coolName(String)} method is invoked, the latency of execution will be recorded. + */ +@Target(ElementType.METHOD) +@Retention(RetentionPolicy.RUNTIME) +public @interface Time { + /** + * @return The histogram's name. + */ + String name(); + + /** + * Tags are a way of adding dimensions to metrics, + * these are constructed using EL syntax e.g. """${{'algorithm':'1','env':'production'}}""" + * + * @return the tags associated to the histogram + */ + String tags() default ""; +} |