co.elastic.apm.agent.sdk.bytebuddy.SimpleMethodSignatureOffsetMappingFactory Maven / Gradle / Ivy
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* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you 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 co.elastic.apm.agent.sdk.bytebuddy;
import net.bytebuddy.asm.Advice;
import net.bytebuddy.description.annotation.AnnotationDescription;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.method.ParameterDescription;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
/**
* Enables using {@link SimpleMethodSignature} in {@link net.bytebuddy.asm.Advice.OnMethodEnter} and
* {@link net.bytebuddy.asm.Advice.OnMethodExit} methods.
*/
public class SimpleMethodSignatureOffsetMappingFactory implements Advice.OffsetMapping.Factory {
@Override
public Class getAnnotationType() {
return SimpleMethodSignature.class;
}
@Override
public Advice.OffsetMapping make(ParameterDescription.InDefinedShape target,
AnnotationDescription.Loadable annotation,
AdviceType adviceType) {
return new Advice.OffsetMapping() {
@Override
public Target resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner,
Advice.ArgumentHandler argumentHandler, Sort sort) {
final String className = instrumentedMethod.getDeclaringType().getTypeName();
String simpleClassName = className.substring(className.lastIndexOf('$') + 1);
simpleClassName = simpleClassName.substring(simpleClassName.lastIndexOf('.') + 1);
final String signature = String.format("%s#%s", simpleClassName, instrumentedMethod.getName());
return Target.ForStackManipulation.of(signature);
}
};
}
/**
* Indicates that the annotated parameter should be mapped to a string representation of the instrumented method,
* a constant representing {@link Class#getSimpleName()}{@code #}{@link Method#getName()},
* for example {@code FooClass#barMethod}
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface SimpleMethodSignature {
}
}