aws-serverless-java-container-jersey sample

LambdaHandler.java

package com.sapessi.sample.jersey;

import com.amazonaws.serverless.proxy.internal.model.AwsProxyRequest;
import com.amazonaws.serverless.proxy.internal.model.AwsProxyResponse;
import com.amazonaws.serverless.proxy.jersey.JerseyLambdaContainerHandler;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.server.ResourceConfig;

public class LambdaHandler implements RequestHandler<AwsProxyRequest, AwsProxyResponse> {
    // Both these instructions will only be executed on the first invocation of the function and reused for all
    // following calls
  
    // load the Jersey resources from my package. This initializes the Jax RS application (ResourceConfig) by default
    // with Jersey
    private ResourceConfig jerseyApplication = new ResourceConfig()
            .packages("com.sapessi.sample.jersey.resources")
            .register(JacksonFeature.class); // this should autowire, struggled to make it work so using the old way of loading it
    // Once I have the app I can initialize the handler
    private JerseyLambdaContainerHandler<AwsProxyRequest, AwsProxyResponse> handler
            = JerseyLambdaContainerHandler.getAwsProxyHandler(jerseyApplication);

    @Override
    public AwsProxyResponse handleRequest(AwsProxyRequest awsProxyRequest, Context context) {
        // proxy events
        return handler.proxy(awsProxyRequest, context);
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.sapessi.sample</groupId>
    <artifactId>serverless-jersey-example</artifactId>
    <version>1.0-SNAPSHOT</version>
  
    <dependencies>
        <dependency>
            <groupId>com.amazonaws.serverless</groupId>
            <artifactId>aws-serverless-java-container-jersey</artifactId>
            <version>0.1</version>
        </dependency>

        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-core</artifactId>
            <version>1.1.0</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.24</version>
        </dependency>
    </dependencies>
  
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <createDependencyReducedPom>false</createDependencyReducedPom>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

sam.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Example Pet Store API written in jersey with the aws-serverless-java-container library
Resources:
  PetStoreFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: com.sapessi.sample.jersey.LambdaHandler::handleRequest
      Runtime: java8
      CodeUri: target/serverless-jersey-example-1.0-SNAPSHOT.jar
      MemorySize: 512
      Policies: AWSLambdaBasicExecutionRole
      Timeout: 20
      Events:
        GetResource:
          Type: Api
          Properties:
            Path: /{proxy+}
            Method: any

Outputs:
  JerseyPetStoreApi:
    Description: URL for application
    Value: !Sub 'https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/pets'
    Export:
      Name: JerseyPetStoreApi