| /* |
| * 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 org.apache.flink.batch.tests; |
| |
| import org.apache.flink.api.common.io.DefaultInputSplitAssigner; |
| import org.apache.flink.api.common.io.InputFormat; |
| import org.apache.flink.api.common.io.statistics.BaseStatistics; |
| import org.apache.flink.api.java.tuple.Tuple2; |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.core.io.GenericInputSplit; |
| import org.apache.flink.core.io.InputSplitAssigner; |
| import org.apache.flink.util.Preconditions; |
| |
| import java.io.IOException; |
| |
| /** |
| * InputFormat that generates a deterministic DataSet of Tuple2(String, Integer) |
| * |
| * <ul> |
| * <li>String: key, can be repeated. |
| * <li>Integer: uniformly distributed int between 0 and 127 |
| * </ul> |
| */ |
| public class Generator implements InputFormat<Tuple2<String, Integer>, GenericInputSplit> { |
| |
| // total number of records |
| private final long numRecords; |
| // total number of keys |
| private final long numKeys; |
| |
| // records emitted per partition |
| private long recordsPerPartition; |
| // number of keys per partition |
| private long keysPerPartition; |
| |
| // number of currently emitted records |
| private long recordCnt; |
| |
| // id of current partition |
| private int partitionId; |
| |
| private final boolean infinite; |
| |
| public static Generator generate(long numKeys, int recordsPerKey) { |
| return new Generator(numKeys, recordsPerKey, false); |
| } |
| |
| public static Generator generateInfinitely(long numKeys) { |
| return new Generator(numKeys, 0, true); |
| } |
| |
| private Generator(long numKeys, int recordsPerKey, boolean infinite) { |
| this.numKeys = numKeys; |
| if (infinite) { |
| this.numRecords = Long.MAX_VALUE; |
| } else { |
| this.numRecords = numKeys * recordsPerKey; |
| } |
| this.infinite = infinite; |
| } |
| |
| @Override |
| public void configure(Configuration parameters) {} |
| |
| @Override |
| public BaseStatistics getStatistics(BaseStatistics cachedStatistics) { |
| return null; |
| } |
| |
| @Override |
| public GenericInputSplit[] createInputSplits(int minNumSplits) { |
| |
| GenericInputSplit[] splits = new GenericInputSplit[minNumSplits]; |
| for (int i = 0; i < minNumSplits; i++) { |
| splits[i] = new GenericInputSplit(i, minNumSplits); |
| } |
| return splits; |
| } |
| |
| @Override |
| public InputSplitAssigner getInputSplitAssigner(GenericInputSplit[] inputSplits) { |
| return new DefaultInputSplitAssigner(inputSplits); |
| } |
| |
| @Override |
| public void open(GenericInputSplit split) throws IOException { |
| this.partitionId = split.getSplitNumber(); |
| // total number of partitions |
| int numPartitions = split.getTotalNumberOfSplits(); |
| |
| // ensure even distribution of records and keys |
| Preconditions.checkArgument( |
| numRecords % numPartitions == 0, |
| "Records cannot be evenly distributed among partitions"); |
| Preconditions.checkArgument( |
| numKeys % numPartitions == 0, "Keys cannot be evenly distributed among partitions"); |
| |
| this.recordsPerPartition = numRecords / numPartitions; |
| this.keysPerPartition = numKeys / numPartitions; |
| |
| this.recordCnt = 0; |
| } |
| |
| @Override |
| public boolean reachedEnd() { |
| return !infinite && this.recordCnt >= this.recordsPerPartition; |
| } |
| |
| @Override |
| public Tuple2<String, Integer> nextRecord(Tuple2<String, Integer> reuse) throws IOException { |
| |
| // build key from partition id and count per partition |
| String key = |
| String.format("%d-%d", this.partitionId, this.recordCnt % this.keysPerPartition); |
| |
| // 128 values to filter on |
| int filterVal = (int) this.recordCnt % 128; |
| |
| this.recordCnt++; |
| |
| reuse.f0 = key; |
| reuse.f1 = filterVal; |
| return reuse; |
| } |
| |
| @Override |
| public void close() {} |
| } |