| /** |
| * 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.benchmark.window; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Random; |
| |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.InputOperator; |
| import com.datatorrent.common.util.BaseOperator; |
| |
| /** |
| * @since 3.7.0 |
| */ |
| public abstract class AbstractGenerator<T> extends BaseOperator implements InputOperator |
| { |
| public final transient DefaultOutputPort<T> data = new DefaultOutputPort<T>(); |
| |
| protected int emitBatchSize = 1000; |
| protected byte[] val = ByteBuffer.allocate(1000).putLong(1234).array(); |
| protected int rate = 20000; |
| protected int emitCount = 0; |
| protected final Random random = new Random(); |
| protected int range = 1000 * 60; // one minute range of hot keys |
| |
| @Override |
| public void beginWindow(long windowId) |
| { |
| super.beginWindow(windowId); |
| emitCount = 0; |
| } |
| |
| public int getEmitBatchSize() |
| { |
| return emitBatchSize; |
| } |
| |
| public void setEmitBatchSize(int emitBatchSize) |
| { |
| this.emitBatchSize = emitBatchSize; |
| } |
| |
| public int getRate() |
| { |
| return rate; |
| } |
| |
| public void setRate(int rate) |
| { |
| this.rate = rate; |
| } |
| |
| public int getRange() |
| { |
| return range; |
| } |
| |
| public void setRange(int range) |
| { |
| this.range = range; |
| } |
| |
| @Override |
| public void emitTuples() |
| { |
| for (int i = 0; i < emitBatchSize && emitCount < rate; i++) { |
| data.emit(generateNextTuple()); |
| emitCount++; |
| } |
| } |
| |
| protected abstract T generateNextTuple(); |
| } |