| /** |
| * 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 com.datatorrent.lib.testbench; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import com.datatorrent.api.Context.OperatorContext; |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.common.util.BaseOperator; |
| |
| /** |
| * This operator consumes tuples which are key value pairs of strings. |
| * The tuples are filtered based on their values, and then the number of times each key occurs is counted. |
| * At the end of the application window each key and the number of times it occurred is emitted. |
| * <p></p> |
| * @displayName HTTP Status Filter |
| * @category Test Bench |
| * @tags filter, count |
| * @since 0.3.2 |
| */ |
| public class HttpStatusFilter extends BaseOperator |
| { |
| private String filterStatus; |
| private Map<String, Integer> collect; |
| public final transient DefaultInputPort<Map<String, String>> inport = new DefaultInputPort<Map<String, String>>() |
| { |
| @Override |
| public void process(Map<String, String> s) |
| { |
| for (Map.Entry<String, String> entry : s.entrySet()) { |
| if (!entry.getValue().equals(filterStatus)) { |
| continue; |
| } |
| if (collect.containsKey(entry.getKey())) { |
| Integer value = (Integer)collect.remove(entry.getKey()); |
| collect.put(entry.getKey(), new Integer(value + 1)); |
| } else { |
| collect.put(entry.getKey(), new Integer(1)); |
| } |
| } |
| } |
| }; |
| |
| @Override |
| public void setup(OperatorContext context) |
| { |
| collect = new HashMap<String, Integer>(); |
| } |
| |
| @Override |
| public void teardown() |
| { |
| } |
| |
| @Override |
| public void beginWindow(long windowId) |
| { |
| collect = new HashMap<String, Integer>(); |
| } |
| |
| // out port |
| public final transient DefaultOutputPort<Map<String, Integer>> outport = new DefaultOutputPort<Map<String, Integer>>(); |
| |
| @Override |
| public void endWindow() |
| { |
| outport.emit(collect); |
| } |
| |
| public String getFilterStatus() |
| { |
| return filterStatus; |
| } |
| |
| /** |
| * Only key with the following value is counted. |
| * @param filterStatus |
| */ |
| public void setFilterStatus(String filterStatus) |
| { |
| this.filterStatus = filterStatus; |
| } |
| } |