[Feature] Provide Java Agent for Apache HttpClient 3.x (#4111)

* Add Java Agent for Apache HttpClient 3.x

* Update Supported-list.md

* Update pom.xml

.github/workflows/plugins-test.yaml

@@ -264,6 +264,8 @@ jobs:
         run: bash test/plugin/run.sh spring-4.1.x-scenario
       - name: Run solrj 7.x (12)
         run: bash test/plugin/run.sh solrj-7.x-scenario
+      - name: Run httpclient 2.0-3.1 (5)
+        run: bash test/plugin/run.sh httpclient-3.x-scenario
       - name: Run httpclient 4.3.x-4.5.x (14)
         run: bash test/plugin/run.sh httpclient-4.3.x-scenario
       - name: Run httpasyncclient 4.0-4.1.3 (7)

apm-sniffer/apm-sdk-plugin/httpclient-3.x-plugin/pom.xml

+<?xml version="1.0"?>
+<!--
+  ~ 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.
+  ~
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.apache.skywalking</groupId>
+        <artifactId>apm-sdk-plugin</artifactId>
+        <version>7.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>apm-httpclient-3.x-plugin</artifactId>
+    <description>SkyWalking Java Agent for commons-httpclient (http://hc.apache.org/httpclient-3.x/)</description>
+    <packaging>jar</packaging>
+
+    <name>httpclient-3.x-plugin</name>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <commons-httpclient.version>3.1</commons-httpclient.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>commons-httpclient</groupId>
+            <artifactId>commons-httpclient</artifactId>
+            <version>${commons-httpclient.version}</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

apm-sniffer/apm-sdk-plugin/httpclient-3.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/httpclient/v3/HttpClientExecuteInterceptor.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.httpclient.v3;
+
+import java.lang.reflect.Method;
+
+import org.apache.commons.httpclient.HostConfiguration;
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.HttpMethod;
+import org.apache.commons.httpclient.URI;
+import org.apache.commons.httpclient.URIException;
+import org.apache.skywalking.apm.agent.core.context.CarrierItem;
+import org.apache.skywalking.apm.agent.core.context.ContextCarrier;
+import org.apache.skywalking.apm.agent.core.context.ContextManager;
+import org.apache.skywalking.apm.agent.core.context.tag.Tags;
+import org.apache.skywalking.apm.agent.core.context.trace.AbstractSpan;
+import org.apache.skywalking.apm.agent.core.context.trace.SpanLayer;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
+import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
+import org.apache.skywalking.apm.network.trace.component.ComponentsDefine;
+
+/**
+ * @author kezhenxu94
+ */
+public class HttpClientExecuteInterceptor implements InstanceMethodsAroundInterceptor {
+
+    @Override
+    public void beforeMethod(
+        final EnhancedInstance objInst,
+        final Method method,
+        final Object[] allArguments,
+        final Class<?>[] argumentsTypes,
+        final MethodInterceptResult result) throws Throwable {
+
+        final HttpClient client = (HttpClient) objInst;
+
+        HostConfiguration hostConfiguration = (HostConfiguration) allArguments[0];
+        if (hostConfiguration == null) {
+            hostConfiguration = client.getHostConfiguration();
+        }
+
+        final HttpMethod httpMethod = (HttpMethod) allArguments[1];
+        final String remotePeer = httpMethod.getURI().getHost() + ":" + httpMethod.getURI().getPort();
+
+        final URI uri = httpMethod.getURI();
+        final String requestURI = getRequestURI(uri);
+
+        final ContextCarrier contextCarrier = new ContextCarrier();
+        final AbstractSpan span = ContextManager.createExitSpan(requestURI, contextCarrier, remotePeer);
+
+        span.setComponent(ComponentsDefine.HTTPCLIENT);
+        Tags.URL.set(span, uri.toString());
+        Tags.HTTP.METHOD.set(span, httpMethod.getName());
+        SpanLayer.asHttp(span);
+
+        for (CarrierItem next = contextCarrier.items(); next.hasNext(); ) {
+            next = next.next();
+            httpMethod.addRequestHeader(next.getHeadKey(), next.getHeadValue());
+        }
+    }
+
+    @Override
+    public Object afterMethod(
+        final EnhancedInstance objInst,
+        final Method method,
+        final Object[] allArguments,
+        final Class<?>[] argumentsTypes,
+        final Object ret) {
+
+        if (ret != null) {
+            final int statusCode = (Integer) ret;
+            final AbstractSpan span = ContextManager.activeSpan();
+            if (statusCode >= 400) {
+                span.errorOccurred();
+                Tags.STATUS_CODE.set(span, Integer.toString(statusCode));
+            }
+        }
+
+        ContextManager.stopSpan();
+        return ret;
+    }
+
+    @Override
+    public void handleMethodException(
+        final EnhancedInstance objInst,
+        final Method method,
+        final Object[] allArguments,
+        final Class<?>[] argumentsTypes,
+        final Throwable t) {
+        ContextManager.activeSpan().errorOccurred().log(t);
+    }
+
+    private String getRequestURI(URI uri) throws URIException {
+        String requestPath = uri.getPath();
+        return requestPath != null && requestPath.length() > 0 ? requestPath : "/";
+    }
+
+}

apm-sniffer/apm-sdk-plugin/httpclient-3.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/httpclient/v3/define/HttpClientInstrumentation.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.httpclient.v3.define;
+
+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 net.bytebuddy.matcher.ElementMatchers.takesArgument;
+import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
+import static org.apache.skywalking.apm.agent.core.plugin.match.NameMatch.byName;
+
+/**
+ * @author kezhenxu94
+ */
+public class HttpClientInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+    private static final String ENHANCE_CLASS = "org.apache.commons.httpclient.HttpClient";
+    private static final String INTERCEPT_CLASS = "org.apache.skywalking.apm.plugin.httpclient.v3.HttpClientExecuteInterceptor";
+
+    @Override
+    protected ClassMatch enhanceClass() {
+        return byName(ENHANCE_CLASS);
+    }
+
+    @Override
+    public ConstructorInterceptPoint[] getConstructorsInterceptPoints() {
+        return null;
+    }
+
+    @Override
+    public InstanceMethodsInterceptPoint[] getInstanceMethodsInterceptPoints() {
+        return new InstanceMethodsInterceptPoint[]{
+            new InstanceMethodsInterceptPoint() {
+                @Override
+                public ElementMatcher<MethodDescription> getMethodsMatcher() {
+                    return named("executeMethod")
+                        .and(takesArguments(3))
+                        .and(takesArgument(0, named("org.apache.commons.httpclient.HostConfiguration")))
+                        .and(takesArgument(1, named("org.apache.commons.httpclient.HttpMethod")))
+                        .and(takesArgument(2, named("org.apache.commons.httpclient.HttpState")));
+                }
+
+                @Override
+                public String getMethodsInterceptor() {
+                    return INTERCEPT_CLASS;
+                }
+
+                @Override
+                public boolean isOverrideArgs() {
+                    return false;
+                }
+            }
+        };
+    }
+}

apm-sniffer/apm-sdk-plugin/httpclient-3.x-plugin/src/main/resources/skywalking-plugin.def

+# 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.
+
+httpclient-3.x=org.apache.skywalking.apm.plugin.httpclient.v3.define.HttpClientInstrumentation

apm-sniffer/apm-sdk-plugin/pom.xml

@@ -81,6 +81,7 @@
         <module>pulsar-plugin</module>
         <module>netty-socketio-plugin</module>
         <module>armeria-0.84.x-plugin</module>
+        <module>httpclient-3.x-plugin</module>
     </modules>
     <packaging>pom</packaging>
 

docs/en/setup/service-agent/java-agent/Supported-list.md

@@ -19,7 +19,7 @@
   * [Feign](https://github.com/OpenFeign/feign) 9.x
   * [Netflix Spring Cloud Feign](https://github.com/spring-cloud/spring-cloud-netflix/tree/master/spring-cloud-starter-feign) 1.1.x, 1.2.x, 1.3.x
   * [Okhttp](https://github.com/square/okhttp) 3.x
-  * [Apache httpcomponent HttpClient](http://hc.apache.org/) 4.2, 4.3
+  * [Apache httpcomponent HttpClient](http://hc.apache.org/) 2.0 -> 3.1, 4.2, 4.3
   * [Spring RestTemplete](https://github.com/spring-projects/spring-framework) 4.x
   * [Jetty Client](http://www.eclipse.org/jetty/) 9
   * [Apache httpcomponent AsyncClient](https://hc.apache.org/httpcomponents-asyncclient-dev/) 4.x

test/plugin/scenarios/httpclient-3.x-scenario/config/expectedData.yaml

+# 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.
+registryItems:
+  applications:
+    - {httpclient-3.x-scenario: 2}
+  instances:
+    - {httpclient-3.x-scenario: 1}
+  operationNames:
+    - httpclient-3.x-scenario: [/httpclient-3.x-scenario/case/httpclient,
+                                /httpclient-3.x-scenario/case/context-propagate]
+  heartbeat: []
+segmentItems:
+  - applicationCode: httpclient-3.x-scenario
+    segmentSize: ge 3
+    segments:
+      - segmentId: not null
+        spans:
+          - operationName: /httpclient-3.x-scenario/case/context-propagate
+            operationId: 0
+            parentSpanId: -1
+            spanId: 0
+            spanLayer: Http
+            startTime: nq 0
+            endTime: nq 0
+            componentId: 1
+            componentName: ''
+            isError: false
+            spanType: Entry
+            peer: ''
+            peerId: 0
+            tags:
+              - {key: url, value: 'http://localhost:8080/httpclient-3.x-scenario/case/context-propagate'}
+              - {key: http.method, value: GET}
+            refs:
+              - {parentEndpointId: 0, parentEndpoint: /httpclient-3.x-scenario/case/httpclient,
+                 networkAddressId: 0, entryEndpointId: 0, refType: CrossProcess, parentSpanId: 1,
+                 parentTraceSegmentId: not null, parentServiceInstanceId: 1,
+                 networkAddress: 'localhost:8080', entryEndpoint: /httpclient-3.x-scenario/case/httpclient,
+                 entryServiceInstanceId: 1}
+      - segmentId: not null
+        spans:
+          - operationName: /httpclient-3.x-scenario/case/context-propagate
+            operationId: 0
+            parentSpanId: 0
+            spanId: 1
+            spanLayer: Http
+            startTime: nq 0
+            endTime: nq 0
+            componentId: 2
+            componentName: ''
+            isError: false
+            spanType: Exit
+            peer: localhost:8080
+            peerId: 0
+            tags:
+              - {key: url, value: 'http://localhost:8080/httpclient-3.x-scenario/case/context-propagate'}
+              - {key: http.method, value: GET}
+          - operationName: /httpclient-3.x-scenario/case/httpclient
+            operationId: 0
+            parentSpanId: -1
+            spanId: 0
+            spanLayer: Http
+            startTime: nq 0
+            endTime: nq 0
+            componentId: 1
+            componentName: ''
+            isError: false
+            spanType: Entry
+            peer: ''
+            peerId: 0
+            tags:
+              - {key: url, value: 'http://localhost:8080/httpclient-3.x-scenario/case/httpclient'}
+              - {key: http.method, value: GET}
\ No newline at end of file

test/plugin/scenarios/httpclient-3.x-scenario/configuration.yml

+# 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.
+
+type: tomcat
+entryService: http://localhost:8080/httpclient-3.x-scenario/case/httpclient
+healthCheck: http://localhost:8080/httpclient-3.x-scenario/healthCheck
+framework: httpclient

test/plugin/scenarios/httpclient-3.x-scenario/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ 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.
+  ~
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.apache.skywalking</groupId>
+    <artifactId>httpclient-3.x-scenario</artifactId>
+    <version>5.0.0</version>
+    <packaging>war</packaging>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <compiler.version>1.8</compiler.version>
+
+        <test.framework>httpclient</test.framework>
+        <test.framework.version>3.1</test.framework.version>
+    </properties>
+
+    <name>skywalking-httpclient-3.x-scenario</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+            <version>3.1.0</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-api</artifactId>
+            <version>2.8.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>2.8.1</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-httpclient</groupId>
+            <artifactId>commons-httpclient</artifactId>
+            <version>${test.framework.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>httpclient-3.x-scenario</finalName>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${compiler.version}</source>
+                    <target>${compiler.version}</target>
+                    <encoding>${project.build.sourceEncoding}</encoding>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
\ No newline at end of file

test/plugin/scenarios/httpclient-3.x-scenario/src/main/java/org/apache/skywalking/apm/testcase/httpclient/CaseServlet.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.testcase.httpclient;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.HttpMethod;
+import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
+import org.apache.commons.httpclient.methods.GetMethod;
+
+/**
+ * @author kezhenxu94
+ */
+public class CaseServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        MultiThreadedHttpConnectionManager httpConnectionManager = new MultiThreadedHttpConnectionManager();
+        HttpClient client = new HttpClient(httpConnectionManager);
+
+        HttpMethod httpGet = new GetMethod("http://localhost:8080" + req.getContextPath() + "/case/context-propagate");
+        int statusCode = client.executeMethod(httpGet);
+
+        try (PrintWriter printWriter = resp.getWriter()) {
+            printWriter.write("success: " + statusCode);
+        }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        doGet(req, resp);
+    }
+
+}

test/plugin/scenarios/httpclient-3.x-scenario/src/main/java/org/apache/skywalking/apm/testcase/httpclient/HealthCheckServlet.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.testcase.httpclient;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+/**
+ * @author kezhenxu94
+ */
+public class HealthCheckServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        try (PrintWriter writer = resp.getWriter()) {
+            writer.write("Success");
+        }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        doGet(req, resp);
+    }
+}

test/plugin/scenarios/httpclient-3.x-scenario/src/main/java/org/apache/skywalking/apm/testcase/httpclient/ServletForContextPropagate.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.testcase.httpclient;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+/**
+ * @author kezhenxu94
+ */
+public class ServletForContextPropagate extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        resp.setContentType("application/json");
+        try (PrintWriter out = resp.getWriter()) {
+            out.print("{'test':'test'}");
+        }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        doGet(req, resp);
+    }
+}

test/plugin/scenarios/httpclient-3.x-scenario/src/main/webapp/WEB-INF/web.xml

+<!--
+  ~ 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.
+  ~
+  -->
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
+		 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+         version="3.1">
+    <display-name>skywalking-httpclient-scenario</display-name>
+
+    <servlet>
+        <servlet-name>caseServlet</servlet-name>
+        <servlet-class>org.apache.skywalking.apm.testcase.httpclient.CaseServlet</servlet-class>
+    </servlet>
+
+    <servlet>
+        <servlet-name>healthCheck</servlet-name>
+        <servlet-class>org.apache.skywalking.apm.testcase.httpclient.HealthCheckServlet</servlet-class>
+    </servlet>
+
+    <servlet-mapping>
+        <servlet-name>healthCheck</servlet-name>
+        <url-pattern>/healthCheck</url-pattern>
+    </servlet-mapping>
+
+    <servlet-mapping>
+        <servlet-name>caseServlet</servlet-name>
+        <url-pattern>/case/httpclient</url-pattern>
+    </servlet-mapping>
+
+    <servlet>
+        <servlet-name>servletForContextPropagate</servlet-name>
+        <servlet-class>org.apache.skywalking.apm.testcase.httpclient.ServletForContextPropagate</servlet-class>
+    </servlet>
+
+    <servlet-mapping>
+        <servlet-name>servletForContextPropagate</servlet-name>
+        <url-pattern>/case/context-propagate</url-pattern>
+    </servlet-mapping>
+</web-app>

test/plugin/scenarios/httpclient-3.x-scenario/support-version.list

+# 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.
+
+2.0
+2.0.2
+3.0
+3.0.1
+3.1
\ No newline at end of file