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* 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.
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package org.apache.flink.streaming.connectors.kafka.testutils;
import java.util.Collection;
import java.util.Properties;
import java.util.Random;
import org.apache.flink.api.common.JobExecutionResult;
import org.apache.flink.api.common.functions.RichFunction;
import org.apache.flink.api.common.restartstrategy.RestartStrategies;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.api.java.typeutils.TypeInfoParser;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.source.RichParallelSourceFunction;
import org.apache.flink.streaming.api.operators.ChainingStrategy;
import org.apache.flink.streaming.api.operators.StreamSink;
import org.apache.flink.streaming.api.transformations.StreamTransformation;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerBase;
import org.apache.flink.streaming.connectors.kafka.KafkaTestEnvironment;
import org.apache.flink.streaming.connectors.kafka.partitioner.FlinkFixedPartitioner;
import org.apache.flink.streaming.connectors.kafka.partitioner.FlinkKafkaPartitioner;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
import org.apache.flink.streaming.util.OneInputStreamOperatorTestHarness;
import org.apache.flink.streaming.util.serialization.KeyedSerializationSchemaWrapper;
import org.apache.flink.streaming.util.serialization.SimpleStringSchema;
import org.apache.flink.streaming.util.serialization.TypeInformationSerializationSchema;
@SuppressWarnings("serial")
public class DataGenerators {
public static void generateRandomizedIntegerSequence(StreamExecutionEnvironment env,
KafkaTestEnvironment testServer, String topic,
final int numPartitions,
final int numElements,
final boolean randomizeOrder) throws Exception {
env.setParallelism(numPartitions);
env.getConfig().disableSysoutLogging();
env.setRestartStrategy(RestartStrategies.noRestart());
DataStream<Integer> stream = env.addSource(
new RichParallelSourceFunction<Integer>() {
private volatile boolean running = true;
@Override
public void run(SourceContext<Integer> ctx) {
// create a sequence
int[] elements = new int[numElements];
for (int i = 0, val = getRuntimeContext().getIndexOfThisSubtask();
i < numElements;
i++, val += getRuntimeContext().getNumberOfParallelSubtasks()) {
elements[i] = val;
}
// scramble the sequence
if (randomizeOrder) {
Random rnd = new Random();
for (int i = 0; i < elements.length; i++) {
int otherPos = rnd.nextInt(elements.length);
int tmp = elements[i];
elements[i] = elements[otherPos];
elements[otherPos] = tmp;
}
}
// emit the sequence
int pos = 0;
while (running && pos < elements.length) {
ctx.collect(elements[pos++]);
}
}
@Override
public void cancel() {
running = false;
}
});
Properties props = new Properties();
props.putAll(FlinkKafkaProducerBase.getPropertiesFromBrokerList(testServer.getBrokerConnectionString()));
Properties secureProps = testServer.getSecureProperties();
if(secureProps != null) {
props.putAll(testServer.getSecureProperties());
}
stream = stream.rebalance();
testServer.produceIntoKafka(stream, topic,
new KeyedSerializationSchemaWrapper<>(new TypeInformationSerializationSchema<>(BasicTypeInfo.INT_TYPE_INFO, env.getConfig())),
props,
new FlinkKafkaPartitioner<Integer>() {
@Override
public int partition(Integer next, byte[] serializedKey, byte[] serializedValue, String topic, int[] partitions) {
return next % partitions.length;
}
});
env.execute("Scrambles int sequence generator");
}
// ------------------------------------------------------------------------
public static class InfiniteStringsGenerator extends Thread {
private final KafkaTestEnvironment server;
private final String topic;
private volatile Throwable error;
private volatile boolean running = true;
public InfiniteStringsGenerator(KafkaTestEnvironment server, String topic) {
this.server = server;
this.topic = topic;
}
@Override
public void run() {
// we manually feed data into the Kafka sink
RichFunction producer = null;
try {
Properties producerProperties = FlinkKafkaProducerBase.getPropertiesFromBrokerList(server.getBrokerConnectionString());
producerProperties.setProperty("retries", "3");
StreamTransformation<String> mockTransform = new MockStreamTransformation();
DataStream<String> stream = new DataStream<>(new DummyStreamExecutionEnvironment(), mockTransform);
StreamSink<String> sink = server.getProducerSink(
topic,
new KeyedSerializationSchemaWrapper<>(new SimpleStringSchema()),
producerProperties,
new FlinkFixedPartitioner<String>());
OneInputStreamOperatorTestHarness<String, Object> testHarness =
new OneInputStreamOperatorTestHarness<>(sink);
testHarness.open();
final StringBuilder bld = new StringBuilder();
final Random rnd = new Random();
while (running) {
bld.setLength(0);
int len = rnd.nextInt(100) + 1;
for (int i = 0; i < len; i++) {
bld.append((char) (rnd.nextInt(20) + 'a') );
}
String next = bld.toString();
testHarness.processElement(new StreamRecord<>(next));
}
}
catch (Throwable t) {
this.error = t;
}
finally {
if (producer != null) {
try {
producer.close();
}
catch (Throwable t) {
// ignore
}
}
}
}
public void shutdown() {
this.running = false;
this.interrupt();
}
public Throwable getError() {
return this.error;
}
private static class MockStreamTransformation extends StreamTransformation<String> {
public MockStreamTransformation() {
super("MockTransform", TypeInfoParser.<String>parse("String"), 1);
}
@Override
public void setChainingStrategy(ChainingStrategy strategy) {
}
@Override
public Collection<StreamTransformation<?>> getTransitivePredecessors() {
return null;
}
}
public static class DummyStreamExecutionEnvironment extends StreamExecutionEnvironment {
@Override
public JobExecutionResult execute(String jobName) throws Exception {
return null;
}
}
}
}