forked from apache/spark
/
JavaKafkaStreamSuite.java
134 lines (113 loc) · 4.35 KB
/
JavaKafkaStreamSuite.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
* 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.spark.streaming.kafka;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import scala.Predef;
import scala.Tuple2;
import scala.collection.JavaConverters;
import junit.framework.Assert;
import kafka.serializer.StringDecoder;
import org.apache.spark.api.java.JavaPairRDD;
import org.apache.spark.api.java.function.Function;
import org.apache.spark.storage.StorageLevel;
import org.apache.spark.streaming.Duration;
import org.apache.spark.streaming.LocalJavaStreamingContext;
import org.apache.spark.streaming.api.java.JavaDStream;
import org.apache.spark.streaming.api.java.JavaPairDStream;
import org.apache.spark.streaming.api.java.JavaStreamingContext;
import org.junit.Test;
import org.junit.After;
import org.junit.Before;
public class JavaKafkaStreamSuite extends LocalJavaStreamingContext implements Serializable {
private transient KafkaStreamSuite testSuite = new KafkaStreamSuite();
@Before
@Override
public void setUp() {
testSuite.beforeFunction();
System.clearProperty("spark.driver.port");
//System.setProperty("spark.streaming.clock", "org.apache.spark.streaming.util.SystemClock");
ssc = new JavaStreamingContext("local[2]", "test", new Duration(1000));
}
@After
@Override
public void tearDown() {
ssc.stop();
ssc = null;
System.clearProperty("spark.driver.port");
testSuite.afterFunction();
}
@Test
public void testKafkaStream() throws InterruptedException {
String topic = "topic1";
HashMap<String, Integer> topics = new HashMap<String, Integer>();
topics.put(topic, 1);
HashMap<String, Integer> sent = new HashMap<String, Integer>();
sent.put("a", 5);
sent.put("b", 3);
sent.put("c", 10);
testSuite.createTopic(topic);
HashMap<String, Object> tmp = new HashMap<String, Object>(sent);
testSuite.produceAndSendMessage(topic,
JavaConverters.mapAsScalaMapConverter(tmp).asScala().toMap(
Predef.<Tuple2<String, Object>>conforms()));
HashMap<String, String> kafkaParams = new HashMap<String, String>();
kafkaParams.put("zookeeper.connect", testSuite.zkHost() + ":" + testSuite.zkPort());
kafkaParams.put("group.id", "test-consumer-" + KafkaTestUtils.random().nextInt(10000));
kafkaParams.put("auto.offset.reset", "smallest");
JavaPairDStream<String, String> stream = KafkaUtils.createStream(ssc,
String.class,
String.class,
StringDecoder.class,
StringDecoder.class,
kafkaParams,
topics,
StorageLevel.MEMORY_ONLY_SER());
final HashMap<String, Long> result = new HashMap<String, Long>();
JavaDStream<String> words = stream.map(
new Function<Tuple2<String, String>, String>() {
@Override
public String call(Tuple2<String, String> tuple2) throws Exception {
return tuple2._2();
}
}
);
words.countByValue().foreachRDD(
new Function<JavaPairRDD<String, Long>, Void>() {
@Override
public Void call(JavaPairRDD<String, Long> rdd) throws Exception {
List<Tuple2<String, Long>> ret = rdd.collect();
for (Tuple2<String, Long> r : ret) {
if (result.containsKey(r._1())) {
result.put(r._1(), result.get(r._1()) + r._2());
} else {
result.put(r._1(), r._2());
}
}
return null;
}
}
);
ssc.start();
ssc.awaitTermination(3000);
Assert.assertEquals(sent.size(), result.size());
for (String k : sent.keySet()) {
Assert.assertEquals(sent.get(k).intValue(), result.get(k).intValue());
}
}
}