[GitHub] [skywalking-java] yswdqz commented on a diff in pull request #286: Add an agent plugin to support tomcat10.x(#7420)

[GitBox <gi...@apache.org>]

yswdqz commented on code in PR #286:
URL: https://github.com/apache/skywalking-java/pull/286#discussion_r926298869


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apm-sniffer/apm-sdk-plugin/tomcat-10x-plugin/src/main/java/org/apache/skywalking/apm/plugin/tomcat10x/ForwardInterceptor.java:
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@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * 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
+ * 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 org.apache.skywalking.apm.plugin.tomcat10x;
+
+import org.apache.skywalking.apm.agent.core.context.ContextManager;
+import org.apache.skywalking.apm.agent.core.context.trace.AbstractSpan;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceConstructorInterceptor;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ForwardInterceptor implements InstanceMethodsAroundInterceptor, InstanceConstructorInterceptor {
+
+    @Override
+    public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
+        MethodInterceptResult result) throws Throwable {
+        if (ContextManager.isActive()) {
+            AbstractSpan abstractTracingSpan = ContextManager.activeSpan();
+            Map<String, String> eventMap = new HashMap<String, String>();
+            eventMap.put("forward-url", objInst.getSkyWalkingDynamicField() == null ? "" : String.valueOf(objInst.getSkyWalkingDynamicField()));

Review Comment:
   I reference the code from tomcat78 plugin. if url has redirect . it will log forward url.



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