AwsLambda函数无法处理所有的Kinesis流
创始人
2024-09-26 05:01:15
0

在Lambda函数中使用Kinesis消费者应用程序去处理所有的Kinesis流。以下是一个示例代码:

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.lambda.runtime.events.KinesisEvent;
import com.amazonaws.services.lambda.runtime.events.KinesisEvent.KinesisEventRecord;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessor;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorFactory;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.KinesisClientLibConfiguration;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.KinesisClientLibShutdownHelper;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.Worker;


public class MyLambdaFunction implements RequestHandler {

    static String streamName = "my-stream-name";
    static String appName = "my-kinesis-app";
    static String regionName = "us-west-2";
    static String workerId = "worker-001";

    public Void handleRequest(KinesisEvent event, Context context) {

        KinesisClientLibConfiguration config = new KinesisClientLibConfiguration(appName, streamName,
                null, workerId);
        config.withRegionName(regionName);

        IRecordProcessorFactory recordProcessorFactory = new MyRecordProcessorFactory();

        Worker worker = new Worker.Builder()
                .recordProcessorFactory(recordProcessorFactory)
                .config(config)
                .build();

        worker.run();

        // Shutdown the worker when the Lambda function is terminated
        KinesisClientLibShutdownHelper.shutdown(worker, config.getWorkerIdentifier());

        return null;
    }

    private class MyRecordProcessorFactory implements IRecordProcessorFactory {

        public IRecordProcessor createProcessor() {
            return new MyRecordProcessor();
        }
    }

    private class MyRecordProcessor implements IRecordProcessor {

        public void initialize(String shardId) {}

        public void processRecords(List records, IRecordProcessorCheckpointer checkpointer) {

            for (KinesisEventRecord rec : records) {
                String data = new String(rec.getKinesis().getData().array());
                System.out.println("Received data: " + data);
            }

            checkpointer.checkpoint();
        }

        public void shutdown(IRecordProcessorCheckpointer checkpointer, ShutdownReason reason) {
            if (reason == ShutdownReason.TERMINATE) {
                checkpointer.checkpoint();
            }
        }
    }
}

这个Lambda函数使用Kinesis消费者应用程序去处理所有的Kinesis流。在处理程序中,每次接收到Kinesis事件时,数据都会被打印到控制台。可以根据需要修改初始化日志输出的方式。

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