Add witness class for kafka plugin (#1300)

apm-sniffer/apm-sdk-plugin/kafka-v1-plugin/src/main/java/org/apache/skywalking/apm/plugin/kafka/v1/define/AbstractKafkaInstrumentation.java

+/*
+ * 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.kafka.v1.define;
+
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
+
+public abstract class AbstractKafkaInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+
+    @Override protected String[] witnessClasses() {
+        return new String[]{"org.apache.kafka.clients.ApiVersions"};
+    }
+}

apm-sniffer/apm-sdk-plugin/kafka-v1-plugin/src/main/java/org/apache/skywalking/apm/plugin/kafka/v1/define/CallbackInstrumentation.java

@@ -22,13 +22,12 @@ import net.bytebuddy.description.method.MethodDescription;
 import net.bytebuddy.matcher.ElementMatcher;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.ConstructorInterceptPoint;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.InstanceMethodsInterceptPoint;
-import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
 import org.apache.skywalking.apm.agent.core.plugin.match.ClassMatch;
 
 import static net.bytebuddy.matcher.ElementMatchers.named;
 import static org.apache.skywalking.apm.agent.core.plugin.match.HierarchyMatch.byHierarchyMatch;
 
-public class CallbackInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+public class CallbackInstrumentation extends AbstractKafkaInstrumentation {
 
     public static final String ENHANCE_CLASS = "org.apache.kafka.clients.producer.Callback";
     public static final String ENHANCE_METHOD = "onCompletion";

apm-sniffer/apm-sdk-plugin/kafka-v1-plugin/src/main/java/org/apache/skywalking/apm/plugin/kafka/v1/define/KafkaConsumerInstrumentation.java

@@ -22,7 +22,6 @@ import net.bytebuddy.description.method.MethodDescription;
 import net.bytebuddy.matcher.ElementMatcher;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.ConstructorInterceptPoint;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.InstanceMethodsInterceptPoint;
-import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
 import org.apache.skywalking.apm.agent.core.plugin.match.ClassMatch;
 
 import static net.bytebuddy.matcher.ElementMatchers.named;
@@ -41,7 +40,7 @@ import static org.apache.skywalking.apm.agent.core.plugin.match.NameMatch.byName
  *
  * @author zhang xin
  */
-public class KafkaConsumerInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+public class KafkaConsumerInstrumentation extends AbstractKafkaInstrumentation {
 
     public static final String CONSTRUCTOR_INTERCEPT_TYPE = "org.apache.kafka.clients.consumer.ConsumerConfig";
     public static final String CONSTRUCTOR_INTERCEPTOR_CLASS = "org.apache.skywalking.apm.plugin.kafka.v1.ConsumerConstructorInterceptor";

apm-sniffer/apm-sdk-plugin/kafka-v1-plugin/src/main/java/org/apache/skywalking/apm/plugin/kafka/v1/define/KafkaProducerInstrumentation.java

@@ -22,7 +22,6 @@ import net.bytebuddy.description.method.MethodDescription;
 import net.bytebuddy.matcher.ElementMatcher;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.ConstructorInterceptPoint;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.InstanceMethodsInterceptPoint;
-import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
 import org.apache.skywalking.apm.agent.core.plugin.match.ClassMatch;
 
 import static net.bytebuddy.matcher.ElementMatchers.named;
@@ -42,7 +41,7 @@ import static org.apache.skywalking.apm.agent.core.plugin.match.NameMatch.byName
  *
  * @author zhang xin
  */
-public class KafkaProducerInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+public class KafkaProducerInstrumentation extends AbstractKafkaInstrumentation {
 
     public static final String INTERCEPTOR_CLASS = "org.apache.skywalking.apm.plugin.kafka.v1.KafkaProducerInterceptor";
     public static final String ENHANCE_CLASS = "org.apache.kafka.clients.producer.KafkaProducer";

apm-sniffer/apm-sdk-plugin/kafka-v1-plugin/src/main/java/org/apache/skywalking/apm/plugin/kafka/v1/define/ProducerRecordInstrumentation.java

@@ -22,13 +22,12 @@ import net.bytebuddy.description.method.MethodDescription;
 import net.bytebuddy.matcher.ElementMatcher;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.ConstructorInterceptPoint;
 import org.apache.skywalking.apm.agent.core.plugin.interceptor.InstanceMethodsInterceptPoint;
-import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
 import org.apache.skywalking.apm.agent.core.plugin.match.ClassMatch;
 
 import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
 import static org.apache.skywalking.apm.agent.core.plugin.match.NameMatch.byName;
 
-public class ProducerRecordInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+public class ProducerRecordInstrumentation extends AbstractKafkaInstrumentation {
 
     public static final String CONSTRUCTOR_INTERCEPTOR_CLASS = "org.apache.skywalking.apm.plugin.kafka.v1.ProducerRecordConstructorInterceptor";
     public static final String ENHANCE_CLASS = "org.apache.kafka.clients.producer.ProducerRecord";