Amazon Kinesis Client Library for Java in the Java Class Library Introduction
Amazon Kinesis Client Library for Java (KCL) is a Java class library provided by Amazon to process Amazon Kinesis data streams.It simplifies the workload of developers when processing large -scale data streaming applications, and provides advanced functions, enabling developers to easily handle and process Amazon Kinesis records.
Amazon Kinesis is a custody service provided by Amazon, which can collect, process and analyze real -time large -scale data streams.KCL is a framework for building an application based on Amazon Kinesis data stream.
Using the KCL library, developers can use Kinesis data to emit and process data records.The KCL library is responsible for processing the consumption and load balancing of data records, and provides consistency guarantee in the processing record process.It also provides fault recovery and monitoring functions to ensure the reliability and stability of the application.
The following is a simple Java code example. How to use the KCL library to obtain the record from the Amazon Kinesis data stream:
import software.amazon.awssdk.services.kinesis.KinesisClient;
import software.amazon.awssdk.services.kinesis.model.*;
public class KinesisConsumer {
public static void main(String[] args) {
String streamName = "your-stream-name";
String shardIteratorType = ShardIteratorType.TRIM_HORIZON.toString();
KinesisClient kinesisClient = KinesisClient.create();
DescribeStreamRequest describeStreamRequest = DescribeStreamRequest.builder()
.streamName(streamName)
.build();
String shardId = kinesisClient.describeStream(describeStreamRequest)
.streamDescription()
.shards()
.get(0)
.shardId();
GetShardIteratorRequest getShardIteratorRequest = GetShardIteratorRequest.builder()
.streamName(streamName)
.shardId(shardId)
.shardIteratorType(shardIteratorType)
.build();
String shardIterator = kinesisClient.getShardIterator(getShardIteratorRequest)
.shardIterator();
GetRecordsRequest getRecordsRequest = GetRecordsRequest.builder()
.shardIterator(shardIterator)
.limit(10)
.build();
GetRecordsResponse getRecordsResponse = kinesisClient.getRecords(getRecordsRequest);
getRecordsResponse.records().forEach(record -> {
String data = new String(record.data().asByteArray());
System.out.println("Received record: " + data);
});
kinesisClient.close();
}
}
The above example code obtains the latest 10 records from the specified Amazon Kinesis data stream, and prints the content of each record.
In summary, Amazon Kinesis Client Library for Java is a powerful Java class library that enables developers to simplify and accelerate the process of processing Amazon Kinesis data stream.It provides rich functions and easy -to -use APIs to help developers build high -efficiency and reliable data flow applications.
