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* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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package org.apache.skywalking.apm.plugin.spring.mvc.v5;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
import org.apache.skywalking.apm.plugin.spring.mvc.commons.EnhanceRequireObjectCache;
import org.apache.skywalking.apm.plugin.spring.mvc.commons.PathMappingCache;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceConstructorInterceptor;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* The ControllerConstructorInterceptor
intercepts the Controller's constructor, in order to acquire the
* mapping annotation, if exist.
*
* But, you can see we only use the first mapping value, Why? *
* Right now, we intercept the controller by annotation as you known, so we CAN'T know which uri patten is actually * matched. Even we know, that costs a lot. *
* If we want to resolve that, we must intercept the Spring MVC core codes, that is not a good choice for now. *
* Comment by @wu-sheng */ public class ControllerConstructorInterceptor implements InstanceConstructorInterceptor { @Override public void onConstruct(EnhancedInstance objInst, Object[] allArguments) { String basePath = ""; RequestMapping basePathRequestMapping = AnnotationUtils.findAnnotation(objInst.getClass(), RequestMapping.class); if (basePathRequestMapping != null) { if (basePathRequestMapping.value().length > 0) { basePath = basePathRequestMapping.value()[0]; } else if (basePathRequestMapping.path().length > 0) { basePath = basePathRequestMapping.path()[0]; } } EnhanceRequireObjectCache enhanceRequireObjectCache = new EnhanceRequireObjectCache(); enhanceRequireObjectCache.setPathMappingCache(new PathMappingCache(basePath)); objInst.setSkyWalkingDynamicField(enhanceRequireObjectCache); } }