| /* |
| * Copyright (c) 2013 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.stream; |
| |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.annotation.Stateless; |
| import com.datatorrent.lib.util.BaseKeyOperator; |
| |
| /** |
| * An implementation of BaseKeyValueOperator that duplicates an input stream as is into two output streams. |
| * <p> |
| * Duplication is needed to allow separation of listeners into two streams with different properties (for example |
| * inline vs in-rack)<p> |
| * This is a pass through operator<br> |
| * <br> |
| * <b>Port Interface</b><br> |
| * <b>data</b>: expects <K><br> |
| * <b>out1</b>: emits <K><br> |
| * <b>out2</b>: emits <K><br> |
| * <br> |
| * @displayName Stream duplicator |
| * @category Stream |
| * @tags duplicate |
| * @since 0.3.2 |
| */ |
| @Stateless |
| public class StreamDuplicater<K> extends BaseKeyOperator<K> |
| { |
| /** |
| * Input data port. |
| */ |
| public final transient DefaultInputPort<K> data = new DefaultInputPort<K>() |
| { |
| /** |
| * Emits tuple on both streams |
| */ |
| @Override |
| public void process(K tuple) |
| { |
| out1.emit(cloneKey(tuple)); |
| out2.emit(cloneKey(tuple)); |
| } |
| }; |
| |
| /** |
| * Output port 1 that emits duplicate of input stream. |
| */ |
| public final transient DefaultOutputPort<K> out1 = new DefaultOutputPort<K>(); |
| |
| /** |
| * Output port 2 that emits duplicate of input stream. |
| */ |
| public final transient DefaultOutputPort<K> out2 = new DefaultOutputPort<K>(); |
| } |