/
HandlerSpanNameExtractor.java
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/
HandlerSpanNameExtractor.java
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/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
package io.opentelemetry.javaagent.instrumentation.springwebmvc;
import io.opentelemetry.instrumentation.api.instrumenter.SpanNameExtractor;
import io.opentelemetry.instrumentation.api.tracer.SpanNames;
import java.lang.reflect.Method;
import javax.servlet.Servlet;
import org.springframework.web.HttpRequestHandler;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.mvc.Controller;
public class HandlerSpanNameExtractor implements SpanNameExtractor<Object> {
@Override
public String extract(Object handler) {
Class<?> clazz;
String methodName;
if (handler instanceof HandlerMethod) {
// name span based on the class and method name defined in the handler
Method method = ((HandlerMethod) handler).getMethod();
clazz = method.getDeclaringClass();
methodName = method.getName();
} else if (handler instanceof HttpRequestHandler) {
// org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter
clazz = handler.getClass();
methodName = "handleRequest";
} else if (handler instanceof Controller) {
// org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter
clazz = handler.getClass();
methodName = "handleRequest";
} else if (handler instanceof Servlet) {
// org.springframework.web.servlet.handler.SimpleServletHandlerAdapter
clazz = handler.getClass();
methodName = "service";
} else {
// perhaps org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter
clazz = handler.getClass();
methodName = "<annotation>";
}
return SpanNames.fromMethod(clazz, methodName);
}
}