| /* |
| * 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.streaming.tests; |
| |
| import org.apache.flink.streaming.api.functions.source.RichParallelSourceFunction; |
| import org.apache.flink.streaming.tests.verify.TtlStateVerifier; |
| |
| import java.util.Map; |
| import java.util.Random; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Source of randomly generated keyed state updates. |
| * |
| * <p>Internal loop generates {@code sleepAfterElements} state updates |
| * for each verifier from {@link TtlStateVerifier#VERIFIERS} using {@link TtlStateVerifier#generateRandomUpdate} |
| * and waits for {@code sleepTime} to continue generation. |
| */ |
| class TtlStateUpdateSource extends RichParallelSourceFunction<TtlStateUpdate> { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private final int maxKey; |
| private final long sleepAfterElements; |
| private final long sleepTime; |
| |
| /** Flag that determines if this source is running, i.e. generating events. */ |
| private volatile boolean running = true; |
| |
| TtlStateUpdateSource(int maxKey, long sleepAfterElements, long sleepTime) { |
| this.maxKey = maxKey; |
| this.sleepAfterElements = sleepAfterElements; |
| this.sleepTime = sleepTime; |
| } |
| |
| @Override |
| public void run(SourceContext<TtlStateUpdate> ctx) throws Exception { |
| Random random = new Random(); |
| long elementsBeforeSleep = sleepAfterElements; |
| while (running) { |
| for (int i = 0; i < sleepAfterElements; i++) { |
| synchronized (ctx.getCheckpointLock()) { |
| Map<String, Object> updates = TtlStateVerifier.VERIFIERS.stream() |
| .collect(Collectors.toMap(TtlStateVerifier::getId, TtlStateVerifier::generateRandomUpdate)); |
| ctx.collect(new TtlStateUpdate(random.nextInt(maxKey), updates)); |
| } |
| } |
| |
| if (sleepTime > 0) { |
| if (elementsBeforeSleep == 1) { |
| elementsBeforeSleep = sleepAfterElements; |
| long rnd = sleepTime < Integer.MAX_VALUE ? random.nextInt((int) sleepTime) : 0L; |
| Thread.sleep(rnd + sleepTime); |
| } else if (elementsBeforeSleep > 1) { |
| --elementsBeforeSleep; |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void cancel() { |
| running = false; |
| } |
| } |