SpringWebMvcPlugin.java example

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/*
 * Copyright 2014 NAVER Corp.
 * 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 com.navercorp.pinpoint.plugin.spring.web;

import static com.navercorp.pinpoint.common.util.VarArgs.va;

import java.security.ProtectionDomain;

import com.navercorp.pinpoint.bootstrap.instrument.InstrumentClass;
import com.navercorp.pinpoint.bootstrap.instrument.InstrumentException;
import com.navercorp.pinpoint.bootstrap.instrument.Instrumentor;
import com.navercorp.pinpoint.bootstrap.instrument.transformer.TransformCallback;
import com.navercorp.pinpoint.bootstrap.instrument.transformer.TransformTemplate;
import com.navercorp.pinpoint.bootstrap.instrument.transformer.TransformTemplateAware;
import com.navercorp.pinpoint.bootstrap.interceptor.BasicMethodInterceptor;
import com.navercorp.pinpoint.bootstrap.plugin.ProfilerPlugin;
import com.navercorp.pinpoint.bootstrap.plugin.ProfilerPluginSetupContext;
import com.navercorp.pinpoint.common.trace.ServiceType;
import com.navercorp.pinpoint.common.trace.ServiceTypeFactory;

/**
 * @author Jongho Moon
 *
 */
public class SpringWebMvcPlugin implements ProfilerPlugin, TransformTemplateAware {
    public static final ServiceType SPRING_MVC = ServiceTypeFactory.of(5051, "SPRING_MVC", "SPRING");

    private TransformTemplate transformTemplate;

    @Override
    public void setup(ProfilerPluginSetupContext context) {
        transformTemplate.transform("org.springframework.web.servlet.FrameworkServlet", new TransformCallback() {

            @Override
            public byte[] doInTransform(Instrumentor instrumentor, ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws InstrumentException {
                InstrumentClass target = instrumentor.getInstrumentClass(loader, className, classfileBuffer);
                
                target.getDeclaredMethod("doGet", "javax.servlet.http.HttpServletRequest", "javax.servlet.http.HttpServletResponse").addInterceptor(BasicMethodInterceptor.class.getName(), va(SPRING_MVC));
                target.getDeclaredMethod("doPost", "javax.servlet.http.HttpServletRequest", "javax.servlet.http.HttpServletResponse").addInterceptor(BasicMethodInterceptor.class.getName(), va(SPRING_MVC));

                return target.toBytecode();
            }
        });

    }

    @Override
    public void setTransformTemplate(TransformTemplate transformTemplate) {
        this.transformTemplate = transformTemplate;
    }

}