com.amazonaws.serverless.proxy.spring.embedded.ServerlessServletEmbeddedServerFactory Maven / Gradle / Ivy

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Allows Java applications written for SpringBoot 3 to run in AWS Lambda

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/*
 * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance
 * with the License. A copy of the License is located at
 *
 * http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.serverless.proxy.spring.embedded;

import com.amazonaws.serverless.proxy.internal.servlet.AwsLambdaServletContainerHandler;
import com.amazonaws.serverless.proxy.spring.SpringBootLambdaContainerHandler;
import org.springframework.boot.autoconfigure.AutoConfigureOrder;
import org.springframework.boot.web.server.WebServer;
import org.springframework.boot.web.server.WebServerException;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
import org.springframework.core.Ordered;

import jakarta.servlet.ServletException;

@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
public class ServerlessServletEmbeddedServerFactory implements ServletWebServerFactory, WebServer {
    @SuppressWarnings("rawtypes")
	private AwsLambdaServletContainerHandler handler;

    public ServerlessServletEmbeddedServerFactory() {
        super();
        handler = SpringBootLambdaContainerHandler.getInstance();
    }

    @Override
    public WebServer getWebServer(ServletContextInitializer... initializers) {
        for (ServletContextInitializer i : initializers) {
            try {
                if (handler.getServletContext() == null) {
                    throw new WebServerException("Attempting to initialize ServletEmbeddedWebServer without ServletContext in Handler", null);
                }
                i.onStartup(handler.getServletContext());
            } catch (ServletException e) {
                throw new WebServerException("Could not initialize Servlets", e);
            }
        }
        return this;
    }

    @Override
    public void start() throws WebServerException {

    }

    @Override
    public void stop() throws WebServerException {

    }

    @Override
    public int getPort() {
        return 0;
    }
}