| /** |
| * 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.avro.ipc.specific; |
| |
| import java.io.IOException; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.Protocol; |
| import org.apache.avro.Protocol.Message; |
| import org.apache.avro.AvroRuntimeException; |
| import org.apache.avro.io.DatumReader; |
| import org.apache.avro.io.DatumWriter; |
| import org.apache.avro.io.Encoder; |
| import org.apache.avro.generic.GenericRecord; |
| import org.apache.avro.specific.SpecificData; |
| import org.apache.avro.specific.SpecificDatumReader; |
| import org.apache.avro.specific.SpecificDatumWriter; |
| import org.apache.avro.ipc.generic.GenericResponder; |
| |
| /** {@link org.apache.avro.ipc.Responder Responder} for generated interfaces.*/ |
| public class SpecificResponder extends GenericResponder { |
| private Object impl; |
| |
| public SpecificResponder(Class iface, Object impl) { |
| this(iface, impl, new SpecificData(impl.getClass().getClassLoader())); |
| } |
| |
| public SpecificResponder(Protocol protocol, Object impl) { |
| this(protocol, impl, new SpecificData(impl.getClass().getClassLoader())); |
| } |
| |
| public SpecificResponder(Class iface, Object impl, SpecificData data) { |
| this(data.getProtocol(iface), impl, data); |
| } |
| |
| public SpecificResponder(Protocol protocol, Object impl, SpecificData data) { |
| super(protocol, data); |
| this.impl = impl; |
| } |
| |
| public SpecificData getSpecificData() {return (SpecificData)getGenericData();} |
| |
| @Override |
| protected DatumWriter<Object> getDatumWriter(Schema schema) { |
| return new SpecificDatumWriter<Object>(schema, getSpecificData()); |
| } |
| |
| @Override |
| protected DatumReader<Object> getDatumReader(Schema actual, Schema expected) { |
| return new SpecificDatumReader<Object>(actual, expected, getSpecificData()); |
| } |
| |
| @Override |
| public void writeError(Schema schema, Object error, |
| Encoder out) throws IOException { |
| getDatumWriter(schema).write(error, out); |
| } |
| |
| @Override |
| public Object respond(Message message, Object request) throws Exception { |
| int numParams = message.getRequest().getFields().size(); |
| Object[] params = new Object[numParams]; |
| Class[] paramTypes = new Class[numParams]; |
| int i = 0; |
| try { |
| for (Schema.Field param: message.getRequest().getFields()) { |
| params[i] = ((GenericRecord)request).get(param.name()); |
| paramTypes[i] = getSpecificData().getClass(param.schema()); |
| i++; |
| } |
| Method method = impl.getClass().getMethod(message.getName(), paramTypes); |
| method.setAccessible(true); |
| return method.invoke(impl, params); |
| } catch (InvocationTargetException e) { |
| if (e.getTargetException() instanceof Exception) { |
| throw (Exception) e.getTargetException(); |
| } else { |
| throw new Exception(e.getTargetException()); |
| } |
| } catch (NoSuchMethodException e) { |
| throw new AvroRuntimeException(e); |
| } catch (IllegalAccessException e) { |
| throw new AvroRuntimeException(e); |
| } |
| } |
| |
| } |
| |