BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

spring-5-security-cognito/README.md

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+## Spring 5 Security Cognito
+
+This module contains articles about Spring 5 with Amazon Cognito
+
+## Relevant articles:
+
+- [Authenticating with Amazon Cognito Using Spring Security](https://www.baeldung.com/spring-security-oauth-cognito)

spring-5-security-cognito/pom.xml

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+<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.baeldung</groupId>
+    <artifactId>spring-5-security-cognito</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-5-security-cognito</name>
+    <packaging>jar</packaging>
+    <description>spring 5 security oauth cognito sample project</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.thymeleaf.extras</groupId>
+            <artifactId>thymeleaf-extras-springsecurity5</artifactId>
+        </dependency>
+
+        <!-- oauth2 -->
+        <dependency>
+            <groupId>org.springframework.security.oauth.boot</groupId>
+            <artifactId>spring-security-oauth2-autoconfigure</artifactId>
+            <version>${oauth-auto.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-oauth2-client</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-oauth2-jose</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+	
+    <properties>
+        <spring-boot.version>2.1.0.RELEASE</spring-boot.version>
+        <oauth-auto.version>2.1.0.RELEASE</oauth-auto.version>
+        <start-class>com.baeldung.cognito.SpringCognitoApplication</start-class>
+    </properties>
+
+</project>

spring-5-security-cognito/src/main/java/com/baeldung/cognito/CognitoWebConfiguration.java

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+package com.baeldung.cognito;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+@PropertySource("cognito/application-cognito.yml")
+public class CognitoWebConfiguration implements WebMvcConfigurer {
+
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        registry.addViewController("/").setViewName("home");
+    }
+}

spring-5-security-cognito/src/main/java/com/baeldung/cognito/SpringCognitoApplication.java

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+package com.baeldung.cognito;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+@PropertySource("cognito/application-cognito.yml")
+public class SpringCognitoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringCognitoApplication.class, args);
+    }
+}

spring-5-security-cognito/src/main/resources/cognito/application-cognito.yml

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+spring:
+  security:
+    oauth2:
+      client:
+        registration:
+          cognito:
+            client-id: clientId
+            client-secret: clientSecret
+            scope: openid
+            redirectUriTemplate: "http://localhost:8080/login/oauth2/code/cognito"
+            clientName: cognito-client-name
+        provider:
+          cognito:
+            issuerUri: https://cognito-idp.{region}.amazonaws.com/{poolId}
+            usernameAttribute: cognito:username

spring-5-security-cognito/src/main/resources/cognito/home.html

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+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/extras/spring-security">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>OAuth2 Cognito Demo</title>
+
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.4/css/bulma.min.css">
+    <link rel="stylesheet" th:href="@{/cognito/style.css}">
+</head>
+<body>
+<section class="section">
+    <div class="container has-text-centered">
+        <div>
+            <h1 class="title">OAuth2 Spring Security Cognito Demo</h1>
+
+            <div sec:authorize="isAuthenticated()">
+                <div class="box">
+                    Hello, <strong th:text="${#authentication.name}"></strong>!
+                </div>
+            </div>
+
+            <div sec:authorize="isAnonymous()">
+                <div class="box">
+                    <a class="button login is-primary" th:href="@{/oauth2/authorization/cognito}">Log in with Amazon Cognito</a>
+                </div>
+            </div>
+        </div>
+    </div>
+</section>
+</body>
+</html>

spring-5-security-cognito/src/main/resources/cognito/style.css

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+.login {
+    background-color: #7289da;
+    color: #fff;
+}
+
+.login:hover {
+    background-color: #697ec4;
+    color: #fff;
+}

spring-5-security-cognito/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>