SqsPoller.java

/*
 * Copyright 2023 Amazon.com, Inc. or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.demo.sqs;

import static com.amazonaws.services.lambda.runtime.events.SQSEvent.SQSMessage;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.lambda.runtime.events.SQSEvent;
import java.security.SecureRandom;
import java.util.Random;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import software.amazon.awssdk.http.urlconnection.UrlConnectionHttpClient;
import software.amazon.awssdk.services.sqs.SqsClient;
import software.amazon.lambda.powertools.logging.Logging;
import software.amazon.lambda.powertools.sqs.SqsBatch;
import software.amazon.lambda.powertools.sqs.SqsMessageHandler;
import software.amazon.lambda.powertools.sqs.SqsUtils;

/**
 * Handler for requests to Lambda function.
 */
public class SqsPoller implements RequestHandler<SQSEvent, String> {

    static {
        // https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/lambda-optimize-starttime.html
        SqsUtils.overrideSqsClient(SqsClient.builder()
                .httpClient(UrlConnectionHttpClient.create())
                .build());
    }

    Logger log = LogManager.getLogger(SqsPoller.class);
    Random random = new SecureRandom();

    @SqsBatch(value = BatchProcessor.class, nonRetryableExceptions = {IllegalArgumentException.class})
    @Logging(logEvent = true)
    public String handleRequest(final SQSEvent input, final Context context) {
        return "Success";
    }

    private class BatchProcessor implements SqsMessageHandler<Object> {
        @Override
        public String process(SQSMessage message) {
            log.info("Processing message with id {}", message.getMessageId());

            int nextInt = random.nextInt(100);

            if (nextInt <= 10) {
                log.info("Randomly picked message with id {} as business validation failure.", message.getMessageId());
                throw new IllegalArgumentException(
                        "Failed business validation. No point of retrying. Move me to DLQ." + message.getMessageId());
            }

            if (nextInt > 90) {
                log.info("Randomly picked message with id {} as intermittent failure.", message.getMessageId());
                throw new RuntimeException(
                        "Failed due to intermittent issue. Will be sent back for retry." + message.getMessageId());
            }

            return "Success";
        }
    }
}