/**
   * Creates a map of concrete json request handler invokers keyed by <b><code>
   * &lt;service-name&gt;/&lt;op-name&gt;</code></b>.
   *
   * @param handlerInstance The request handler instance to generate invokers for
   * @return the map of generated invokers
   */
  public static Map<String, Map<String, AbstractJSONRequestHandlerInvoker>> createInvokers(
      Object handlerInstance) {
    if (handlerInstance == null)
      throw new IllegalArgumentException("The passed handlerInstance was null");
    Map<String, AbstractJSONRequestHandlerInvoker> subInvokerMap =
        new HashMap<String, AbstractJSONRequestHandlerInvoker>();
    Map<String, Map<String, AbstractJSONRequestHandlerInvoker>> invokerMap =
        invokerCache.get(handlerInstance.getClass());
    if (invokerMap != null) {
      LOG.info("Found Cached Invokers for [{}]", handlerInstance.getClass().getName());
      return invokerMap;
    }
    invokerMap = new HashMap<String, Map<String, AbstractJSONRequestHandlerInvoker>>(1);

    LOG.info("Generating Invokers for [{}]", handlerInstance.getClass().getName());
    JSONRequestService svc = handlerInstance.getClass().getAnnotation(JSONRequestService.class);
    final String invokerServiceKey = svc.name();
    final String invokerServiceDescription = svc.description();

    invokerMap.put(invokerServiceKey, subInvokerMap);

    ClassPool cp = new ClassPool();
    cp.appendClassPath(new ClassClassPath(handlerInstance.getClass()));
    cp.appendClassPath(new ClassClassPath(AbstractJSONRequestHandlerInvoker.class));
    cp.importPackage(handlerInstance.getClass().getPackage().getName());
    Set<ClassLoader> classPathsAdded = new HashSet<ClassLoader>();
    Set<String> packagesImported = new HashSet<String>();
    try {
      final CtClass jsonRequestCtClass = cp.get(JSONRequest.class.getName());
      final CtClass parent = cp.get(AbstractJSONRequestHandlerInvoker.class.getName());
      CtClass targetClass = cp.get(handlerInstance.getClass().getName());
      Collection<Method> methods = getTargetMethods(handlerInstance.getClass());
      for (Method m : methods) {
        final JSONRequestHandler jsonHandler = m.getAnnotation(JSONRequestHandler.class);
        final String opName = jsonHandler.name();
        final String opDescription = jsonHandler.description();
        final RequestType opType = jsonHandler.type();

        int targetMethodHashCode = m.toGenericString().hashCode();
        final String className =
            String.format(
                "%s-%s%s-%s-%s",
                handlerInstance.getClass().getName(),
                invokerServiceKey,
                opName,
                "ServiceInvoker",
                targetMethodHashCode);

        final CtClass invokerClass = cp.makeClass(className, parent);
        CtField ctf = new CtField(targetClass, "typedTarget", invokerClass);
        ctf.setModifiers(ctf.getModifiers() | Modifier.FINAL);
        invokerClass.addField(ctf);
        for (CtConstructor parentCtor : parent.getConstructors()) {
          CtConstructor invokerCtor = CtNewConstructor.copy(parentCtor, invokerClass, null);
          invokerCtor.setBody(
              "{ super($$); typedTarget = (" + handlerInstance.getClass().getName() + ")$1; }");
          invokerClass.addConstructor(invokerCtor);
        }
        CtMethod invokerMethod =
            CtNewMethod.copy(
                parent.getDeclaredMethod("doInvoke", new CtClass[] {jsonRequestCtClass}),
                invokerClass,
                null);
        StringBuilder b = new StringBuilder("{this.typedTarget.").append(m.getName()).append("($1");
        final Class<?>[] ptypes = m.getParameterTypes();
        final int remainingParamCount = ptypes.length - 1;
        //				Set<Class<?>> classPathsAdded = new HashSet<Class<?>>();
        //				Set<String> packagesImported = new HashSet<String>();
        if (remainingParamCount > 0) {
          for (int i = 0; i < remainingParamCount; i++) {
            final Class<?> type = ptypes[i + 1];
            if (type.getName().contains("UniqueIdType")) {
              System.err.println("Comin Up....");
            }
            if (type.isPrimitive()) {
              b.append(", (").append(type.getName()).append(") null");
            } else {
              if (classPathsAdded.add(type.getClassLoader())) {
                cp.appendClassPath(new LoaderClassPath(type.getClassLoader()));
              }
              try {
                Package p = type.getPackage();
                if (p == null) {
                  if (type.isArray()) {
                    if (!type.getComponentType().isPrimitive()) {
                      p = type.getComponentType().getPackage();
                    }
                  }
                }
                if (type.isEnum()) {
                  final String f = type.getEnclosingClass().getName() + "." + type.getSimpleName();
                  b.append(", (").append(f).append(") null");
                  String pack = type.getEnclosingClass().getPackage().getName();
                  if (packagesImported.add(pack)) {
                    cp.importPackage(pack);
                  }
                  continue;
                }

                if (p != null) {
                  if (packagesImported.add(p.getName())) {
                    cp.importPackage(p.getName());
                  }
                }
              } catch (Exception ex) {
                ex.printStackTrace(System.err);
              }
              b.append(", (").append(type.getSimpleName()).append(") null");
            }
          }
        }

        b.append(");}");
        System.out.println("[" + m.getName() + "]: [" + b.toString() + "]");
        // invokerMethod.setBody("{this.typedTarget." + m.getName() + "($1);}");
        invokerMethod.setBody(b.toString());
        invokerMethod.setModifiers(invokerMethod.getModifiers() & ~Modifier.ABSTRACT);
        invokerClass.addMethod(invokerMethod);
        // invokerClass.writeFile(System.getProperty("java.io.tmpdir") + File.separator +
        // "jsoninvokers");
        Class<?> clazz =
            invokerClass.toClass(
                handlerInstance.getClass().getClassLoader(),
                handlerInstance.getClass().getProtectionDomain());
        Constructor<?> ctor =
            clazz.getDeclaredConstructor(
                Object.class,
                String.class,
                String.class,
                String.class,
                String.class,
                RequestType.class);
        AbstractJSONRequestHandlerInvoker invokerInstance =
            (AbstractJSONRequestHandlerInvoker)
                ctor.newInstance(
                    handlerInstance,
                    invokerServiceKey,
                    invokerServiceDescription,
                    opName,
                    opDescription,
                    opType);
        subInvokerMap.put(opName, invokerInstance);
      }
      invokerCache.put(handlerInstance.getClass(), invokerMap);
      return invokerMap;
    } catch (Exception ex) {
      LOG.error(
          "Failed to create RequestHandlerInvoker for [{}]",
          handlerInstance.getClass().getName(),
          ex);
      throw new RuntimeException(
          "Failed to create RequestHandlerInvoker [" + handlerInstance.getClass().getName() + "]",
          ex);
    }
  }
예제 #2
0
  public ClazzInfo classProcessing(String clazzName)
      throws NotFoundException, CannotCompileException {
    ClassPool classPool = ClassPool.getDefault();
    CtClass cz = classPool.get(clazzName);
    classPool.importPackage(clazzName); // 继承
    classPool.importPackage("java.lang.reflect.Method"); // 添加反射引用

    CtClass newClass = classPool.makeClass(clazzName + "$MC_IMPL"); // 新建代理类
    newClass.setSuperclass(cz); // 继承

    // 构造块
    CtConstructor tempC;
    CtConstructor[] ctConstructors = cz.getDeclaredConstructors();
    newClass.addConstructor(CtNewConstructor.defaultConstructor(newClass));
    for (CtConstructor c : ctConstructors) {
      try {
        tempC = CtNewConstructor.copy(c, newClass, null);
        tempC.setBody("{super($$);}");
        newClass.addConstructor(tempC);
      } catch (Exception e) {
        // e.printStackTrace();
      }
    }

    // 字段块
    //		CtField[] ctFields = cz.getDeclaredFields();
    //		for (CtField f : ctFields)
    //			System.out.println(f.getFieldInfo().getConstantValue());

    // 方法块
    CtMethod[] ctMethods = cz.getDeclaredMethods();
    CtMethod tempM; // 复制方法名
    Map<String, Method> tempMethod = new HashMap<String, Method>();
    for (CtMethod m : ctMethods) {
      tempMethod.put(
          String.format(
              "%s %s %s(%s);",
              Modifier.toString(m.getModifiers()),
              m.getReturnType().getName(),
              m.getName(),
              Util.getParameterTypes(m.getParameterTypes())),
          null);
      // System.err.println(String.format("%s %s %s(%s);", Modifier.toString(m.getModifiers()),
      // m.getReturnType().getName(), m.getName(), Util.getParameterTypes(m.getParameterTypes())));
      tempM = CtNewMethod.copy(m, newClass, null);
      if ("void".equals(tempM.getReturnType().getName()))
        tempM.setBody("{super." + tempM.getName() + "($$);}");
      else tempM.setBody("{ return super." + tempM.getName() + "($$);}");
      //				CtNewMethod.make(src, declaring, delegateObj, delegateMethod)
      // 方法修改
      //			if (m.getName().equals("x")) {
      //				//tempM.setBody("{$proceed($$);}", "this", "mba");
      //				//tempM.setBody("{n nn = new n();" + "Method a = n.class.getDeclaredMethod(\"a\", new
      // Class[] { Integer.TYPE });" + "a.invoke(nn, new Object[] { Integer.valueOf(1) });}");
      //				tempM.setBody("{Method a = n.class.getDeclaredMethod(\"axx\", new Class[] { Integer.TYPE
      // });}");
      //			}
      newClass.addMethod(tempM);
    }

    // 测试输出
    try {
      newClass.writeFile("D:/Desktop");
    } catch (IOException e) {
      e.printStackTrace();
    }

    //		Class clazz = newClass.toClass();
    //		System.out.println(clazz.getCanonicalName());
    //		DefaultCachePoolFactory.newInstance().addNFloop4Map(new ClazzInfo(clazz, tempMethod),
    // DefaultPool.NORNAL_BEAN, clazz.getCanonicalName());
    //		return clazz;
    return new ClazzInfo(newClass.toClass(), tempMethod);
  }