| /* |
| * Copyright (c) 2014 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * 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.datatorrent.lib.io; |
| |
| import com.sun.jersey.api.client.ClientResponse; |
| import com.sun.jersey.api.client.WebResource; |
| |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.annotation.OutputPortFieldAnnotation; |
| |
| /** |
| * Http get operator to extract query parameters from incoming tuple and make GET calls to |
| * the set url. |
| * |
| * If the output port is connected, the response is processed |
| * |
| * @param <INPUT> tuple type of input port |
| * @param <OUTPUT> tuple type of output port |
| */ |
| public abstract class AbstractHttpGetOperator<INPUT, OUTPUT> extends AbstractHttpOperator<INPUT> |
| { |
| @OutputPortFieldAnnotation(name = "output", optional = true) |
| public final transient DefaultOutputPort<OUTPUT> output = new DefaultOutputPort<OUTPUT>(); |
| |
| @Override |
| protected void processTuple(INPUT t) |
| { |
| WebResource wr = getResourceWithQueryParams(t); |
| if (output.isConnected()) { |
| ClientResponse response = wr.get(ClientResponse.class); |
| processResponse(response); |
| } |
| else { |
| wr.get(ClientResponse.class); |
| } |
| } |
| |
| protected abstract WebResource getResourceWithQueryParams(INPUT t); |
| |
| protected abstract void processResponse(ClientResponse response); |
| |
| } |