change: nutz http 1.x without java.lang.reflect.*

use ConstructorInterceptPoint to get "org.nutz.http.Request",
and store in SkyWalkingDynamicField, then set header in SenderSendInterceptor

apm-sniffer/apm-sdk-plugin/nutz-plugins/http-1.x-plugin/src/main/java/org/skywalking/apm/plugin/nutz/http/sync/SenderConstructorInterceptor.java

+package org.skywalking.apm.plugin.nutz.http.sync;
+
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
+import org.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceConstructorInterceptor;
+
+public class SenderConstructorInterceptor implements InstanceConstructorInterceptor {
+
+    @Override
+    public void onConstruct(final EnhancedInstance objInst, final Object[] allArguments) {
+        objInst.setSkyWalkingDynamicField(allArguments[0]);
+    }
+}

apm-sniffer/apm-sdk-plugin/nutz-plugins/http-1.x-plugin/src/main/java/org/skywalking/apm/plugin/nutz/http/sync/SenderSendInterceptor.java

 package org.skywalking.apm.plugin.nutz.http.sync;
 
-import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.net.URI;
 
 import org.nutz.http.Request;
 import org.nutz.http.Request.METHOD;
 import org.nutz.http.Response;
-import org.nutz.http.Sender;
 import org.skywalking.apm.agent.core.conf.Config;
 import org.skywalking.apm.agent.core.context.ContextCarrier;
 import org.skywalking.apm.agent.core.context.ContextManager;
@@ -22,11 +20,9 @@ import org.skywalking.apm.network.trace.component.ComponentsDefine;
 public class SenderSendInterceptor implements InstanceMethodsAroundInterceptor {
 
     @Override
-    public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
-        MethodInterceptResult result) throws Throwable {
-        Field field = Sender.class.getDeclaredField("request");
-        field.setAccessible(true);
-        Request req = (Request) field.get(objInst);
+    public void beforeMethod(final EnhancedInstance objInst, final Method method, final Object[] allArguments, final Class<?>[] argumentsTypes,
+        final MethodInterceptResult result) throws Throwable {
+        Request req = (Request) objInst.getSkyWalkingDynamicField();
         final URI requestURL = req.getUrl().toURI();
         final METHOD httpMethod = req.getMethod();
         final ContextCarrier contextCarrier = new ContextCarrier();
@@ -42,7 +38,7 @@ public class SenderSendInterceptor implements InstanceMethodsAroundInterceptor {
     }
 
     @Override
-    public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
+    public Object afterMethod(final EnhancedInstance objInst, final Method method, final Object[] allArguments, final Class<?>[] argumentsTypes,
         Object ret) throws Throwable {
         Response response = (Response)ret;
         int statusCode = response.getStatus();
@@ -55,8 +51,9 @@ public class SenderSendInterceptor implements InstanceMethodsAroundInterceptor {
         return ret;
     }
 
-    @Override public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments,
-        Class<?>[] argumentsTypes, Throwable t) {
+    @Override 
+    public void handleMethodException(final EnhancedInstance objInst, final Method method, final Object[] allArguments,
+        final Class<?>[] argumentsTypes, final Throwable t) {
         ContextManager.activeSpan().errorOccurred().log(t);
     }
 }

apm-sniffer/apm-sdk-plugin/nutz-plugins/http-1.x-plugin/src/main/java/org/skywalking/apm/plugin/nutz/http/sync/define/NutzHttpInstrumentation.java

@@ -12,41 +12,60 @@ import net.bytebuddy.description.method.MethodDescription;
 import net.bytebuddy.matcher.ElementMatcher;
 
 /**
- * {@link NutzHttpInstrumentation} enhance the <code>doExecute</code> method,<code>handleResponse</code> method and
- * <code>handleResponse</code> method of <code>org.springframework.web.client.RestTemplate</code> by
- * <code>org.skywalking.apm.plugin.spring.resttemplate.sync.RestExecuteInterceptor</code>,
- * <code>org.skywalking.apm.plugin.spring.resttemplate.sync.RestResponseInterceptor</code> and
- * <code>org.skywalking.apm.plugin.spring.resttemplate.sync.RestRequestInterceptor</code>.
- *
- * <code>org.skywalking.apm.plugin.spring.resttemplate.sync.RestResponseInterceptor</code> set context to  header for
- * propagate trace context after execute <code>createRequest</code>.
+ * {@link NutzHttpInstrumentation} enhance the <code>send</code>
+ * method,<code>Constructor</code> of <code>org.nutz.http.Sender</code> by
+ * <code>org.skywalking.apm.plugin.nutz.http.sync.SenderConstructorInterceptor</code>, and
+ * <code>org.skywalking.apm.plugin.nutz.http.sync.SenderSendInterceptor</code>
+ * set context to header for propagate trace context around execute
+ * <code>send</code>.
  *
  * @author wendal
  */
 public class NutzHttpInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
 
     private static final String ENHANCE_CLASS = "org.nutz.http.Sender";
-    private static final String DO_EXECUTE_METHOD_NAME = "send";
-    private static final String DO_EXECUTE_INTERCEPTOR = "org.skywalking.apm.plugin.nutz.http.sync.SenderSendInterceptor";
+    private static final String DO_SEND_METHOD_NAME = "send";
+    private static final String DO_SEND_INTERCEPTOR = "org.skywalking.apm.plugin.nutz.http.sync.SenderSendInterceptor";
+    private static final String DO_CONSTRUCTOR_INTERCEPTOR = "org.skywalking.apm.plugin.nutz.http.sync.SenderConstructorInterceptor";
 
     @Override
     protected ConstructorInterceptPoint[] getConstructorsInterceptPoints() {
-        return new ConstructorInterceptPoint[0];
+        return new ConstructorInterceptPoint[]{
+            new ConstructorInterceptPoint() {
+                @Override
+                public ElementMatcher<MethodDescription> getConstructorMatcher() {
+                    return new ElementMatcher<MethodDescription>() {
+                        @Override
+                        public boolean matches(MethodDescription target) {
+                            return target.isConstructor() && target.getParameters().size() > 0;
+                        }
+                    };
+                }
+                
+                @Override
+                public String getConstructorInterceptor() {
+                    return DO_CONSTRUCTOR_INTERCEPTOR;
+                }
+            }
+        };
     }
 
     @Override
     protected InstanceMethodsInterceptPoint[] getInstanceMethodsInterceptPoints() {
-        return new InstanceMethodsInterceptPoint[] {
+        return new InstanceMethodsInterceptPoint[]{
             new InstanceMethodsInterceptPoint() {
-                @Override public ElementMatcher<MethodDescription> getMethodsMatcher() {
-                    return named(DO_EXECUTE_METHOD_NAME);
+                @Override
+                public ElementMatcher<MethodDescription> getMethodsMatcher() {
+                    return named(DO_SEND_METHOD_NAME);
                 }
                 
-                @Override public String getMethodsInterceptor() {
-                    return DO_EXECUTE_INTERCEPTOR;
+                @Override
+                public String getMethodsInterceptor() {
+                    return DO_SEND_INTERCEPTOR;
                 }
                 
-                @Override public boolean isOverrideArgs() {
+                @Override
+                public boolean isOverrideArgs() {
                     return false;
                 }
             }