com.amazonaws.services.lambda.runtime.api.client.runtimeapi.DtoSerializers Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of aws-lambda-java-runtime-interface-client Show documentation

The AWS Lambda Java Runtime Interface Client implements the Lambda programming model for Java

The newest version!

/*
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package com.amazonaws.services.lambda.runtime.api.client.runtimeapi;

import com.amazonaws.services.lambda.runtime.api.client.runtimeapi.dto.ErrorRequest;
import com.amazonaws.services.lambda.runtime.api.client.runtimeapi.dto.XRayErrorCause;
import com.amazonaws.services.lambda.runtime.serialization.PojoSerializer;
import com.amazonaws.services.lambda.runtime.serialization.factories.GsonFactory;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class DtoSerializers {

    public static byte[] serialize(ErrorRequest error) {
        return serialize(error, SingletonHelper.LAMBDA_ERROR_SERIALIZER);
    }

    public static byte[] serialize(XRayErrorCause xRayErrorCause) {
        return serialize(xRayErrorCause, SingletonHelper.X_RAY_ERROR_CAUSE_SERIALIZER);
    }

    private static  byte[] serialize(T pojo, PojoSerializer serializer) {
        try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
            serializer.toJson(pojo, outputStream);
            return outputStream.toByteArray();
        } catch (IOException e) {
            return null;
        }
    }

    /**
     * Implementation of
     * Initialization-on-demand holder idiom
     * This way the serializers will be loaded lazily
     */
    private static class SingletonHelper {
        private static final PojoSerializer LAMBDA_ERROR_SERIALIZER = GsonFactory.getInstance().getSerializer(ErrorRequest.class);
        private static final PojoSerializer X_RAY_ERROR_CAUSE_SERIALIZER = GsonFactory.getInstance().getSerializer(XRayErrorCause.class);
    }
}