| /* |
| * 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.benchmark; |
| |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.InputOperator; |
| import com.datatorrent.api.Context.OperatorContext; |
| import javax.validation.constraints.Min; |
| |
| /** |
| * <p> |
| * RandomWordInputModule class. |
| * </p> |
| * |
| * @since 0.3.2 |
| */ |
| public class RandomWordInputModule implements InputOperator |
| { |
| public final transient DefaultOutputPort<byte[]> output = new DefaultOutputPort<byte[]>(); |
| private transient int count; |
| private boolean firstTime; |
| |
| private boolean emitSameTuple = false; |
| byte[] sameTupleArray; |
| |
| @Min(1) |
| private int tupleSize = 64; |
| |
| /** |
| * Sets the size of the tuple to the specified size. The change to tuple size takes effect in next window. |
| * |
| * @param size |
| * the tupleSize to set |
| */ |
| public void setTupleSize(int size) |
| { |
| tupleSize = size; |
| if (emitSameTuple) { |
| sameTupleArray = new byte[tupleSize]; |
| } |
| } |
| |
| /** |
| * @return the tupleSize |
| */ |
| public int getTupleSize() |
| { |
| return tupleSize; |
| } |
| |
| /** |
| * Sets the property that decides if the operator emits same tuple or creates new tuple for every emit. The change |
| * takes effect in next window. |
| * |
| * @param isSameTuple |
| * the boolean value to set for 'emitSameTuple' property |
| */ |
| public void setEmitSameTuple(boolean isSameTuple) |
| { |
| emitSameTuple = isSameTuple; |
| if (isSameTuple) { |
| sameTupleArray = new byte[tupleSize]; |
| } |
| } |
| |
| /** |
| * @return the emitSameTuple property |
| */ |
| public boolean getEmitSameTuple() |
| { |
| return emitSameTuple; |
| } |
| |
| |
| /** |
| * Emits byte array of specified size. |
| * Emits either the same byte array or creates new byte array every time |
| * depending on the value of emitSameTuple property. |
| * Local copies of tupleSize and emitSameTuple are made to improve the |
| * performance. |
| * |
| */ |
| @Override |
| public void emitTuples() |
| { |
| final int TUPLE_SIZE_COPY = tupleSize; |
| final boolean EMIT_SAME_TUPLE_COPY = emitSameTuple; |
| if (firstTime) { |
| if (EMIT_SAME_TUPLE_COPY) { |
| for (int i = count--; i-- > 0;) { |
| output.emit(sameTupleArray); |
| } |
| } else { |
| for (int i = count--; i-- > 0;) { |
| output.emit(new byte[TUPLE_SIZE_COPY]); |
| } |
| } |
| firstTime = false; |
| } else { |
| if (EMIT_SAME_TUPLE_COPY) { |
| output.emit(sameTupleArray); |
| } else { |
| output.emit(new byte[TUPLE_SIZE_COPY]); |
| } |
| count++; |
| } |
| } |
| |
| @Override |
| public void beginWindow(long windowId) |
| { |
| firstTime = true; |
| } |
| |
| @Override |
| public void endWindow() |
| { |
| } |
| |
| @Override |
| public void setup(OperatorContext context) |
| { |
| } |
| |
| @Override |
| public void teardown() |
| { |
| } |
| |
| } |