@Test
public void javaHandleKafkaStorage() {
final ConsumerProperties consumerProperties =
new PropertiesBuilder.Consumer(
brokerList, zooKeepHost, topic, groupId, new StringDecoder(null))
.build()
.readFromEndOfStream()
.consumerTimeoutMs(1234)
.kafkaOffsetsStorage(true);
final ConsumerConfig consumerConfig = consumerProperties.toConsumerConfig();
assertEquals(consumerProperties.zookeeperConnect(), zooKeepHost);
assertEquals(consumerProperties.topic(), topic);
assertEquals(consumerProperties.groupId(), groupId);
assertEquals(
consumerProperties.decoder().getClass().getSimpleName(),
StringDecoder.class.getSimpleName());
assertEquals(consumerConfig.clientId(), groupId);
assertEquals(consumerConfig.autoOffsetReset(), "largest");
assertEquals(consumerConfig.offsetsStorage(), "kafka");
assertEquals(consumerConfig.consumerTimeoutMs(), 1234);
assertEquals(consumerConfig.dualCommitEnabled(), true);
}
@Test
public void javaHandleBaseCase() {
final PropertiesBuilder.Consumer propsBuilder =
new PropertiesBuilder.Consumer(
brokerList, zooKeepHost, topic, groupId, new StringDecoder(null));
assertEquals(propsBuilder.getBrokerList(), brokerList);
assertEquals(propsBuilder.getZooKeeperHost(), zooKeepHost);
final ConsumerProperties consumerProperties = propsBuilder.build();
final ConsumerConfig consumerConfig = consumerProperties.toConsumerConfig();
assertEquals(consumerProperties.zookeeperConnect(), zooKeepHost);
assertEquals(consumerProperties.topic(), topic);
assertEquals(consumerProperties.groupId(), groupId);
assertEquals(
consumerProperties.decoder().getClass().getSimpleName(),
StringDecoder.class.getSimpleName());
assertEquals(consumerConfig.clientId(), groupId);
assertEquals(consumerConfig.autoOffsetReset(), "smallest");
assertEquals(consumerConfig.offsetsStorage(), "zookeeper");
assertEquals(consumerConfig.consumerTimeoutMs(), 1500);
assertEquals(consumerConfig.dualCommitEnabled(), false);
}
/**
* For the @param consumerConfig, specify at least the "groupid" and "zookeeper.connect" string.
* The config will be passed into the Kafka High Level Consumer. For a full list of possible
* values, check this out: https://kafka.apache.org/documentation.html#consumerconfigs
*/
public PersistentKafkaSource(
String topicName,
DeserializationSchema<OUT> deserializationSchema,
ConsumerConfig consumerConfig) {
Preconditions.checkNotNull(topicName);
Preconditions.checkNotNull(deserializationSchema);
Preconditions.checkNotNull(consumerConfig);
this.topicName = topicName;
this.deserializationSchema = deserializationSchema;
this.consumerConfig = consumerConfig;
if (consumerConfig.autoCommitEnable()) {
throw new IllegalArgumentException(
"'auto.commit.enable' is set to 'true'. "
+ "This source can only be used with auto commit disabled because the "
+ "source is committing to zookeeper by itself (not using the KafkaConsumer).");
}
if (!consumerConfig.offsetsStorage().equals("zookeeper")) {
// we can currently only commit to ZK.
throw new IllegalArgumentException(
"The 'offsets.storage' has to be set to 'zookeeper' for this Source to work reliably");
}
}