add feign default http plugin (#205)

* add feign default http plugin
add test case for feign default http interceptor

* move feign and okhttp plugins to the parent moudle

apm-sniffer/apm-agent/pom.xml

@@ -75,6 +75,11 @@
             <artifactId>apm-okhttp-3.x-plugin</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.skywalking</groupId>
+            <artifactId>apm-feign-default-http-9.x-plugin</artifactId>
+            <version>${project.version}</version>
+        </dependency>
 
         <!-- activation -->
         <dependency>

apm-sniffer/apm-sdk-plugin/feign-default-http-9.x-plugin/pom.xml

@@ -3,16 +3,24 @@
          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">
     <parent>
-        <artifactId>apm-sdk-plugin</artifactId>
         <groupId>org.skywalking</groupId>
+        <artifactId>apm-sdk-plugin</artifactId>
         <version>3.1-2017</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
-    <artifactId>http-plugin</artifactId>
-    <packaging>pom</packaging>
-    <modules>
-        <module>okhttp-3.x-plugin</module>
-    </modules>
+    <artifactId>apm-feign-default-http-9.x-plugin</artifactId>
+    <packaging>jar</packaging>
 
+    <properties>
+        <feign.version>9.5.0</feign.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.github.openfeign</groupId>
+            <artifactId>feign-core</artifactId>
+            <version>${feign.version}</version>
+        </dependency>
+    </dependencies>
 </project>

apm-sniffer/apm-sdk-plugin/feign-default-http-9.x-plugin/src/main/java/org/skywalking/apm/plugin/feign/http/v9/DefaultHttpClientInterceptor.java

@@ -0,0 +1,110 @@
+package org.skywalking.apm.plugin.feign.http.v9;
+
+import feign.Request;
+import feign.Response;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import org.skywalking.apm.agent.core.conf.Config;
+import org.skywalking.apm.agent.core.context.ContextCarrier;
+import org.skywalking.apm.agent.core.context.ContextManager;
+import org.skywalking.apm.agent.core.plugin.interceptor.EnhancedClassInstanceContext;
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodInvokeContext;
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
+import org.skywalking.apm.trace.Span;
+import org.skywalking.apm.trace.tag.Tags;
+
+/**
+ * {@link DefaultHttpClientInterceptor} intercept the default implementation of http calls by the Feign.
+ *
+ * @author pengys5
+ */
+public class DefaultHttpClientInterceptor implements InstanceMethodsAroundInterceptor {
+
+    private static final String COMPONENT_NAME = "FeignDefaultHttp";
+
+    /**
+     * Get the {@link feign.Request} from {@link EnhancedClassInstanceContext}, then create {@link Span} and set host,
+     * port, kind, component, url from {@link feign.Request}.
+     * Through the reflection of the way, set the http header of context data into {@link feign.Request#headers}.
+     *
+     * @param context instance context, a class instance only has one {@link EnhancedClassInstanceContext} instance.
+     * @param interceptorContext method context, includes class name, method name, etc.
+     * @param result change this result, if you want to truncate the method.
+     * @throws Throwable
+     */
+    @Override
+    public void beforeMethod(EnhancedClassInstanceContext context, InstanceMethodInvokeContext interceptorContext,
+        MethodInterceptResult result) throws Throwable {
+        Request request = (Request)interceptorContext.allArguments()[0];
+
+        URL url = new URL(request.url());
+        Span span = ContextManager.createSpan(request.url());
+        Tags.PEER_PORT.set(span, url.getPort());
+        Tags.PEER_HOST.set(span, url.getHost());
+        Tags.SPAN_KIND.set(span, Tags.SPAN_KIND_CLIENT);
+        Tags.COMPONENT.set(span, COMPONENT_NAME);
+        Tags.HTTP.METHOD.set(span, request.method());
+        Tags.URL.set(span, url.getPath());
+        Tags.SPAN_LAYER.asHttp(span);
+
+        ContextCarrier contextCarrier = new ContextCarrier();
+        ContextManager.inject(contextCarrier);
+
+        List<String> contextCollection = new ArrayList<String>();
+        contextCollection.add(contextCarrier.serialize());
+
+        Field headersField = Request.class.getDeclaredField("headers");
+        Field modifiersField = Field.class.getDeclaredField("modifiers");
+        modifiersField.setAccessible(true);
+        modifiersField.setInt(headersField, headersField.getModifiers() & ~Modifier.FINAL);
+
+        headersField.setAccessible(true);
+        Map<String, Collection<String>> headers = new LinkedHashMap<String, Collection<String>>();
+        headers.put(Config.Plugin.Http.HEADER_NAME_OF_CONTEXT_DATA, contextCollection);
+        headers.putAll(request.headers());
+
+        headersField.set(request, Collections.unmodifiableMap(headers));
+    }
+
+    /**
+     * Get the status code from {@link Response}, when status code greater than 400, it means there was some errors in
+     * the server.
+     * Finish the {@link Span}.
+     *
+     * @param context instance context, a class instance only has one {@link EnhancedClassInstanceContext} instance.
+     * @param interceptorContext method context, includes class name, method name, etc.
+     * @param ret the method's original return value.
+     * @return
+     * @throws Throwable
+     */
+    @Override
+    public Object afterMethod(EnhancedClassInstanceContext context, InstanceMethodInvokeContext interceptorContext,
+        Object ret) throws Throwable {
+        Response response = (Response)ret;
+        int statusCode = response.status();
+
+        Span span = ContextManager.activeSpan();
+        if (statusCode >= 400) {
+            Tags.ERROR.set(span, true);
+        }
+
+        Tags.STATUS_CODE.set(span, statusCode);
+        ContextManager.stopSpan();
+
+        return ret;
+    }
+
+    @Override public void handleMethodException(Throwable t, EnhancedClassInstanceContext context,
+        InstanceMethodInvokeContext interceptorContext) {
+        Tags.ERROR.set(ContextManager.activeSpan(), true);
+        ContextManager.activeSpan().log(t);
+    }
+}

apm-sniffer/apm-sdk-plugin/feign-default-http-9.x-plugin/src/main/java/org/skywalking/apm/plugin/feign/http/v9/define/DefaultHttpClientInstrumentation.java

@@ -0,0 +1,53 @@
+package org.skywalking.apm.plugin.feign.http.v9.define;
+
+import net.bytebuddy.description.method.MethodDescription;
+import net.bytebuddy.matcher.ElementMatcher;
+import org.skywalking.apm.agent.core.plugin.interceptor.ConstructorInterceptPoint;
+import org.skywalking.apm.agent.core.plugin.interceptor.InstanceMethodsInterceptPoint;
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
+import org.skywalking.apm.plugin.feign.http.v9.DefaultHttpClientInterceptor;
+
+import static net.bytebuddy.matcher.ElementMatchers.named;
+
+/**
+ * {@link DefaultHttpClientInstrumentation} presents that skywalking intercepts {@link
+ * feign.Client.Default#execute(feign.Request, feign.Request.Options)} by using {@link DefaultHttpClientInterceptor}.
+ * If feign did't run in default mode, the instrumentation depend on the http client implementation.
+ * e.g. okhttp client implementation depend on okhttp-plugin.
+ *
+ * @author pengys5
+ */
+public class DefaultHttpClientInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
+
+    /**
+     * Enhance class.
+     */
+    private static final String ENHANCE_CLASS = "feign.Client$Default";
+
+    /**
+     * Intercept class.
+     */
+    private static final String INTERCEPT_CLASS = "org.skywalking.apm.plugin.feign.http.v9.DefaultHttpClientInterceptor";
+
+    @Override protected String enhanceClassName() {
+        return ENHANCE_CLASS;
+    }
+
+    @Override protected ConstructorInterceptPoint[] getConstructorsInterceptPoints() {
+        return new ConstructorInterceptPoint[0];
+    }
+
+    @Override protected InstanceMethodsInterceptPoint[] getInstanceMethodsInterceptPoints() {
+        return new InstanceMethodsInterceptPoint[] {
+            new InstanceMethodsInterceptPoint() {
+                @Override public ElementMatcher<MethodDescription> getMethodsMatcher() {
+                    return named("execute");
+                }
+
+                @Override public String getMethodsInterceptor() {
+                    return INTERCEPT_CLASS;
+                }
+            }
+        };
+    }
+}

apm-sniffer/apm-sdk-plugin/feign-default-http-9.x-plugin/src/main/resources/skywalking-plugin.def

@@ -0,0 +1 @@
+feign-default-http-9.x=org.skywalking.apm.plugin.feign.http.v9.define.DefaultHttpClientInstrumentation

apm-sniffer/apm-sdk-plugin/feign-default-http-9.x-plugin/src/test/java/org/skywalking/apm/plugin/feign/http/v9/DefaultHttpClientInterceptorTest.java

@@ -0,0 +1,135 @@
+package org.skywalking.apm.plugin.feign.http.v9;
+
+import feign.Request;
+import feign.Response;
+import java.nio.charset.Charset;
+import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+import org.skywalking.apm.agent.core.boot.ServiceManager;
+import org.skywalking.apm.agent.core.context.TracerContext;
+import org.skywalking.apm.agent.core.plugin.interceptor.EnhancedClassInstanceContext;
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodInvokeContext;
+import org.skywalking.apm.sniffer.mock.context.MockTracerContextListener;
+import org.skywalking.apm.sniffer.mock.context.SegmentAssert;
+import org.skywalking.apm.trace.Span;
+import org.skywalking.apm.trace.TraceSegment;
+import org.skywalking.apm.trace.tag.Tags;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * @author pengys5
+ */
+@RunWith(PowerMockRunner.class)
+@PrepareForTest({Response.class})
+public class DefaultHttpClientInterceptorTest {
+
+    private DefaultHttpClientInterceptor defaultHttpClientInterceptor;
+    private MockTracerContextListener mockTracerContextListener;
+
+    private EnhancedClassInstanceContext classInstanceContext;
+
+    @Mock
+    private InstanceMethodInvokeContext instanceMethodInvokeContext;
+
+    private Request request;
+
+    @Before
+    public void setUp() throws Exception {
+        mockTracerContextListener = new MockTracerContextListener();
+
+        classInstanceContext = new EnhancedClassInstanceContext();
+
+        Map<String, Collection<String>> headers = new LinkedHashMap<String, Collection<String>>();
+        request = Request.create("GET", "http://skywalking.org", headers, "Test".getBytes(), Charset.forName("UTF-8"));
+
+        Request.Options options = new Request.Options();
+
+        Object[] allArguments = {request, options};
+        when(instanceMethodInvokeContext.allArguments()).thenReturn(allArguments);
+
+        ServiceManager.INSTANCE.boot();
+        defaultHttpClientInterceptor = new DefaultHttpClientInterceptor();
+
+        TracerContext.ListenerManager.add(mockTracerContextListener);
+    }
+
+    @Test
+    public void testMethodsAround() throws Throwable {
+        defaultHttpClientInterceptor.beforeMethod(classInstanceContext, instanceMethodInvokeContext, null);
+
+        Response response = mock(Response.class);
+        when(response.status()).thenReturn(200);
+        defaultHttpClientInterceptor.afterMethod(classInstanceContext, instanceMethodInvokeContext, response);
+
+        mockTracerContextListener.assertSize(1);
+        mockTracerContextListener.assertTraceSegment(0, new SegmentAssert() {
+            @Override public void call(TraceSegment finishedSegment) {
+                Assert.assertEquals(1, finishedSegment.getSpans().size());
+                assertSpan(finishedSegment.getSpans().get(0));
+                Assert.assertEquals(false, Tags.ERROR.get(finishedSegment.getSpans().get(0)));
+            }
+        });
+    }
+
+    @Test
+    public void testMethodsAroundError() throws Throwable {
+        defaultHttpClientInterceptor.beforeMethod(classInstanceContext, instanceMethodInvokeContext, null);
+
+        Response response = mock(Response.class);
+        when(response.status()).thenReturn(404);
+        defaultHttpClientInterceptor.afterMethod(classInstanceContext, instanceMethodInvokeContext, response);
+
+        mockTracerContextListener.assertSize(1);
+        mockTracerContextListener.assertTraceSegment(0, new SegmentAssert() {
+            @Override public void call(TraceSegment finishedSegment) {
+                Assert.assertEquals(1, finishedSegment.getSpans().size());
+                assertSpan(finishedSegment.getSpans().get(0));
+                Assert.assertEquals(true, Tags.ERROR.get(finishedSegment.getSpans().get(0)));
+            }
+        });
+    }
+
+    private void assertSpan(Span span) {
+        Assert.assertEquals("http", Tags.SPAN_LAYER.get(span));
+        Assert.assertEquals("GET", Tags.HTTP.METHOD.get(span));
+        Assert.assertEquals("skywalking.org", Tags.PEER_HOST.get(span));
+        Assert.assertEquals(-1, Tags.PEER_PORT.get(span).intValue());
+        Assert.assertEquals("FeignDefaultHttp", Tags.COMPONENT.get(span));
+        Assert.assertEquals("client", Tags.SPAN_KIND.get(span));
+        Assert.assertEquals("", Tags.URL.get(span));
+    }
+
+    @Test
+    public void testException() throws Throwable {
+        defaultHttpClientInterceptor.beforeMethod(classInstanceContext, instanceMethodInvokeContext, null);
+
+        defaultHttpClientInterceptor.handleMethodException(new NullPointerException("testException"), classInstanceContext, null);
+
+        Response response = mock(Response.class);
+        when(response.status()).thenReturn(200);
+        defaultHttpClientInterceptor.afterMethod(classInstanceContext, instanceMethodInvokeContext, response);
+
+        mockTracerContextListener.assertSize(1);
+        mockTracerContextListener.assertTraceSegment(0, new SegmentAssert() {
+            @Override public void call(TraceSegment finishedSegment) {
+                Assert.assertEquals(1, finishedSegment.getSpans().size());
+                assertSpan(finishedSegment.getSpans().get(0));
+                Assert.assertEquals(true, Tags.ERROR.get(finishedSegment.getSpans().get(0)));
+
+                Assert.assertEquals(1, finishedSegment.getSpans().get(0).getLogs().size());
+                Assert.assertEquals(true, finishedSegment.getSpans().get(0).getLogs().get(0).getFields().containsKey("stack"));
+                Assert.assertEquals("testException", finishedSegment.getSpans().get(0).getLogs().get(0).getFields().get("message"));
+            }
+        });
+    }
+}

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

@@ -3,8 +3,8 @@
          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">
     <parent>
-        <artifactId>http-plugin</artifactId>
         <groupId>org.skywalking</groupId>
+        <artifactId>apm-sdk-plugin</artifactId>
         <version>3.1-2017</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -24,11 +24,5 @@
             <version>${okhttp.version}</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>com.squareup.okhttp3</groupId>
-            <artifactId>mockwebserver</artifactId>
-            <version>3.7.0</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 </project>

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

@@ -18,7 +18,8 @@
         <module>tomcat-7.x-8.x-plugin</module>
         <module>motan-plugin</module>
         <module>mongodb-3.x-plugin</module>
-        <module>http-plugin</module>
+        <module>feign-default-http-9.x-plugin</module>
+        <module>okhttp-3.x-plugin</module>
         <module>resin-3.x-plugin</module>
         <module>resin-4.x-plugin</module>
     </modules>