[英]Connect AWS SQS to Apache-Flink
目前,Apache Flink中没有适用于AWS SQS的连接器。 看一下已经存在的连接器 。 我假设您已经知道这一点,并希望提供一些指导。 我最近也在寻找SQS连接器,并发现了该邮件线程 。
Apache Kinesis Connector在某种程度上类似于您可以在其上实现的功能。 查看是否可以使用此连接器对此进行入门。
对原始问题的回答可能为时已晚......我编写了一个 SQS 使用者作为 SourceFunction,使用 SQS 的 Java 消息服务库:
SQSConsumer extends RichParallelSourceFunction<String> {
private volatile boolean isRunning;
private transient AmazonSQS sqs;
private transient SQSConnectionFactory connectionFactory;
private transient ExecutorService consumerExecutor;
@Override
public void open(Configuration parameters) throws Exception {
String region = ...
AWSCredentialsProvider credsProvider = ...
// may be use a blocking array backed thread pool to handle surges?
consumerExecutor = Executors.newCachedThreadPool();
ClientConfiguration clientConfig = PredefinedClientConfigurations.defaultConfig();
this.sqs = AmazonSQSAsyncClientBuilder.standard().withRegion(region).withCredentials(credsProvider)
.withClientConfiguration(clientConfig)
.withExecutorFactory(()->consumerExecutor).build();
this.connectionFactory = new SQSConnectionFactory(new ProviderConfiguration(), sqs);
this.isRunning = true;
}
@Override
public void run(SourceContext<String> ctx) throws Exception {
SQSConnection connection = connectionFactory.createConnection();
// ack each msg explicitly
Session session = connection.createSession(false, SQSSession.UNORDERED_ACKNOWLEDGE);
Queue queue = session.createQueue(<queueName>);
MessageConsumer msgConsumer = session.createConsumer(queue);
msgConsumer.setMessageListener(msg -> {
try {
String msgId = msg.getJMSMessageID();
String evt = ((TextMessage) msg).getText();
ctx.collect(evt);
msg.acknowledge();
} catch (JSMException e) {
// log and move on the next msg or bail with an exception
// have a dead letter queue is configured so this message is not lost
// msg is not acknowledged so it may be picked up again by another consumer instance
}
};
// check if we were canceled
if (!isRunning) {
return;
}
connection.start();
while (!consumerExecutor.awaitTermination(1, TimeUnit.MINUTES)) {
// keep waiting
}
}
@Override
public void cancel() {
isRunning = false;
// this method might be called before the task actually starts running
if (sqs != null) {
sqs.shutdown();
}
if(consumerExecutor != null) {
consumerExecutor.shutdown();
try {
consumerExecutor.awaitTermination(1, TimeUnit.MINUTES);
} catch (Exception e) {
//log e
}
}
}
@Override
public void close() throws Exception {
cancel();
super.close();
}
}
请注意,如果您使用的是标准 SQS 队列,则可能必须根据是否需要仅一次保证来删除消息。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.