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package eu.ortlepp.notificationsender.service;
import com.amazonaws.services.lambda.runtime.LambdaLogger;
import eu.ortlepp.notificationsender.util.Config;
import java.util.List;
import software.amazon.awssdk.http.HttpStatusCode;
import software.amazon.awssdk.services.sns.SnsClient;
import software.amazon.awssdk.services.sns.model.PublishRequest;
import software.amazon.awssdk.services.sns.model.PublishResponse;
import software.amazon.awssdk.services.sns.model.SnsException;
/**
* A notification sender for Amazon SNS.
*/
public class SnsNotificationSender implements NotificationSender {
private final LambdaLogger logger;
/**
* Constructor to initialize the sender.
*
* @param logger The logger of the AWS Lambda
*/
public SnsNotificationSender(final LambdaLogger logger) {
this.logger = logger;
}
/**
* Send a list of notifications to the configured SNS topic.
* All notifications are combined into a single message.
*
* @param notifications The notifications to send
* @return The result of the sending; true = successful, false = error occurred
*/
@Override
public boolean sendNotifications(final List<String> notifications) {
String notification = formatNotifications(notifications);
try (SnsClient snsClient = SnsClient.builder().region(Config.REGION).build()) {
PublishRequest request =
PublishRequest.builder().message(notification).topicArn(Config.ARN).build();
PublishResponse result = snsClient.publish(request);
int resultStatusCode = result.sdkHttpResponse().statusCode();
if (resultStatusCode == HttpStatusCode.OK) {
logger.log("notification sent successfully");
return true;
}
logger.log("sending notification failed with status " + resultStatusCode);
logger.log("failed message was " + notification);
return false;
} catch (SnsException ex) {
logger.log("sending notification failed: " + ex.getMessage());
logger.log("failed message was " + notification);
return false;
}
}
}
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