| /*
|
| * Copyright 1999-2011 Alibaba Group.
|
| *
|
| * Licensed 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 com.alibaba.dubbo.rpc.filter; |
| |
| import java.lang.reflect.Constructor;
|
| import java.lang.reflect.Field;
|
| import java.lang.reflect.Method;
|
|
|
| import com.alibaba.dubbo.common.Constants;
|
| import com.alibaba.dubbo.common.extension.Activate;
|
| import com.alibaba.dubbo.common.logger.Logger;
|
| import com.alibaba.dubbo.common.logger.LoggerFactory;
|
| import com.alibaba.dubbo.common.utils.PojoUtils;
|
| import com.alibaba.dubbo.common.utils.ReflectUtils;
|
| import com.alibaba.dubbo.rpc.Filter;
|
| import com.alibaba.dubbo.rpc.Invocation;
|
| import com.alibaba.dubbo.rpc.Invoker;
|
| import com.alibaba.dubbo.rpc.Result;
|
| import com.alibaba.dubbo.rpc.RpcException;
|
| import com.alibaba.dubbo.rpc.RpcInvocation;
|
| import com.alibaba.dubbo.rpc.RpcResult;
|
| import com.alibaba.dubbo.rpc.service.GenericException;
|
| |
| /** |
| * GenericImplInvokerFilter |
| * |
| * @author william.liangf |
| */
|
| @Activate(group = Constants.CONSUMER, value = Constants.GENERIC_KEY) |
| public class GenericImplFilter implements Filter {
|
|
|
| private static final Logger logger = LoggerFactory.getLogger(GenericImplFilter.class); |
| |
| private static final Class<?>[] GENERIC_PARAMETER_TYPES = new Class<?>[] {String.class, String[].class, Object[].class}; |
| |
| public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { |
| if (invoker.getUrl().getParameter(Constants.GENERIC_KEY, false)
|
| && ! Constants.$INVOKE.equals(invocation.getMethodName()) |
| && invocation instanceof RpcInvocation) { |
| RpcInvocation invocation2 = (RpcInvocation) invocation; |
| String methodName = invocation2.getMethodName(); |
| Class<?>[] parameterTypes = invocation2.getParameterTypes(); |
| Object[] arguments = invocation2.getArguments(); |
| |
| String[] types = new String[parameterTypes.length]; |
| for (int i = 0; i < parameterTypes.length; i ++) { |
| types[i] = ReflectUtils.getName(parameterTypes[i]); |
| } |
| Object[] args = PojoUtils.generalize(arguments); |
| |
| invocation2.setMethodName(Constants.$INVOKE); |
| invocation2.setParameterTypes(GENERIC_PARAMETER_TYPES); |
| invocation2.setArguments(new Object[] {methodName, types, args}); |
| Result result = invoker.invoke(invocation2); |
| |
| if (! result.hasException()) {
|
| Object value = result.getValue();
|
| try {
|
| Method method = invoker.getInterface().getMethod(methodName, parameterTypes);
|
| return new RpcResult(PojoUtils.realize(value, method.getReturnType(), method.getGenericReturnType()));
|
| } catch (NoSuchMethodException e) {
|
| throw new RpcException(e.getMessage(), e);
|
| }
|
| } else if (result.getException() instanceof GenericException) {
|
| GenericException exception = (GenericException) result.getException();
|
| try {
|
| String className = exception.getExceptionClass();
|
| Class<?> clazz = ReflectUtils.forName(className);
|
| Throwable targetException = null;
|
| Throwable lastException = null;
|
| try {
|
| targetException = (Throwable) clazz.newInstance();
|
| } catch (Throwable e) {
|
| lastException = e;
|
| for (Constructor<?> constructor : clazz.getConstructors()) {
|
| try {
|
| targetException = (Throwable) constructor.newInstance(new Object[constructor.getParameterTypes().length]);
|
| break;
|
| } catch (Throwable e1) {
|
| lastException = e1;
|
| }
|
| }
|
| }
|
| if (targetException != null) {
|
| try {
|
| Field field = Throwable.class.getDeclaredField("detailMessage");
|
| if (! field.isAccessible()) {
|
| field.setAccessible(true);
|
| }
|
| field.set(targetException, exception.getExceptionMessage());
|
| } catch (Throwable e) {
|
| logger.warn(e.getMessage(), e);
|
| }
|
| result = new RpcResult(targetException);
|
| } else if (lastException != null) {
|
| throw lastException;
|
| }
|
| } catch (Throwable e) {
|
| throw new RpcException("Can not deserialize exception " + exception.getExceptionClass() + ", message: " + exception.getExceptionMessage(), e);
|
| }
|
| } |
| return result; |
| } |
| return invoker.invoke(invocation); |
| } |
| |
| } |