From aa122113ade36f02dc8fdbebdf1232b5c4b8742c Mon Sep 17 00:00:00 2001
From: Kamal Wickramanayake <kamal@inbox.lk>
Date: Fri, 3 Jul 2026 19:02:36 +0530
Subject: Microservice sample projects

---
 .../oauth2server/Oauth2ServerApplication.java      | 13 ++++++++
 .../com/example/oauth2server/config/AppConfig.java | 16 +++++++++
 .../oauth2server/config/SecurityConfig.java        | 27 +++++++++++++++
 .../oauth2server/config/UserProperties.java        | 19 +++++++++++
 .../src/main/resources/application.yaml            | 39 ++++++++++++++++++++++
 .../src/main/resources/templates/error.html        | 26 +++++++++++++++
 .../oauth2server/Oauth2ServerApplicationTests.java | 13 ++++++++
 7 files changed, 153 insertions(+)
 create mode 100644 microservices/01-oauth2-server/src/main/java/com/example/oauth2server/Oauth2ServerApplication.java
 create mode 100644 microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/AppConfig.java
 create mode 100644 microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/SecurityConfig.java
 create mode 100644 microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/UserProperties.java
 create mode 100644 microservices/01-oauth2-server/src/main/resources/application.yaml
 create mode 100644 microservices/01-oauth2-server/src/main/resources/templates/error.html
 create mode 100644 microservices/01-oauth2-server/src/test/java/com/example/oauth2server/Oauth2ServerApplicationTests.java

(limited to 'microservices/01-oauth2-server/src')

diff --git a/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/Oauth2ServerApplication.java b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/Oauth2ServerApplication.java
new file mode 100644
index 0000000..68ee050
--- /dev/null
+++ b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/Oauth2ServerApplication.java
@@ -0,0 +1,13 @@
+package com.example.oauth2server;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Oauth2ServerApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Oauth2ServerApplication.class, args);
+	}
+
+}
diff --git a/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/AppConfig.java b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/AppConfig.java
new file mode 100644
index 0000000..d841104
--- /dev/null
+++ b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/AppConfig.java
@@ -0,0 +1,16 @@
+package com.example.oauth2server.config;
+
+import java.util.List;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationProperties(prefix = "app")
+public class AppConfig {
+    private List<UserProperties> users;
+
+    // Getters and Setters are required
+    public List<UserProperties> getUsers() { return users; }
+    public void setUsers(List<UserProperties> users) { this.users = users; }
+}
diff --git a/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/SecurityConfig.java b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/SecurityConfig.java
new file mode 100644
index 0000000..205ad71
--- /dev/null
+++ b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/SecurityConfig.java
@@ -0,0 +1,27 @@
+package com.example.oauth2server.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.core.userdetails.User;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.provisioning.InMemoryUserDetailsManager;
+
+@Configuration
+public class SecurityConfig {
+    private AppConfig appConfig;
+
+    public SecurityConfig(AppConfig appConfig) {
+        this.appConfig = appConfig;
+    }
+
+    @Bean
+    public UserDetailsService userDetailsService() {
+        InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager();
+
+        appConfig.getUsers().forEach(user -> manager.createUser(User.withUsername(user.getUsername())
+                .password(user.getPassword())
+                .build()));
+
+        return manager;
+    }
+}
diff --git a/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/UserProperties.java b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/UserProperties.java
new file mode 100644
index 0000000..c81a52a
--- /dev/null
+++ b/microservices/01-oauth2-server/src/main/java/com/example/oauth2server/config/UserProperties.java
@@ -0,0 +1,19 @@
+package com.example.oauth2server.config;
+
+public class UserProperties {
+    private String username;
+    private String password;
+
+    public String getUsername() {
+        return username;
+    }
+    public void setUsername(String username) {
+        this.username = username;
+    }
+    public String getPassword() {
+        return password;
+    }
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}
diff --git a/microservices/01-oauth2-server/src/main/resources/application.yaml b/microservices/01-oauth2-server/src/main/resources/application.yaml
new file mode 100644
index 0000000..b263a5e
--- /dev/null
+++ b/microservices/01-oauth2-server/src/main/resources/application.yaml
@@ -0,0 +1,39 @@
+server:
+  port: 8051
+  address: 127.0.0.1
+
+#logging:
+#  level:
+#    org.springframework.security: trace
+
+spring:
+  application:
+    name: oauth2-server
+  security:
+    oauth2:
+      authorizationserver:
+        client:
+          oidc-client:
+            registration:
+              client-id: "api-gateway"
+              client-secret: "{noop}apiGatewayPassword1234"
+              client-authentication-methods:
+                - "client_secret_basic"
+              authorization-grant-types:
+                - "authorization_code"
+                - "refresh_token"
+              redirect-uris:
+                - "http://localhost:5173/bff/login/oauth2/code/api-gateway"
+              post-logout-redirect-uris:
+                - "http://localhost:5173/"
+              scopes:
+                - "openid"
+                - "profile"
+            require-authorization-consent: false
+
+app:
+  users:
+    - username: admin
+      password: "{noop}abc123"
+    - username: user1
+      password: "{noop}abc123"
diff --git a/microservices/01-oauth2-server/src/main/resources/templates/error.html b/microservices/01-oauth2-server/src/main/resources/templates/error.html
new file mode 100644
index 0000000..f97dc77
--- /dev/null
+++ b/microservices/01-oauth2-server/src/main/resources/templates/error.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html xmlns:th="http://thymeleaf.org" xmlns:sec="http://thymeleaf.org/extras/spring-security">
+
+<head>
+    <title>An Error Occurred</title>
+</head>
+
+<body>
+    <h1>Something went wrong!</h1>
+    <p>Status: <span th:text="${status}">500</span></p>
+    <p>Error: <span th:text="${error}">Internal Server Error</span></p>
+    <p>Message: <span th:text="${message}">Unexpected error</span></p>
+    <p>Path: <span th:text="${path}">/</span></p>
+
+    <a th:href="@{/}">Back to Home</a>
+
+    <div sec:authorize="isAuthenticated()" style="padding-top: 10px;">
+        <form th:action="@{/logout}" method="post">
+            <button type="submit">
+                Logout
+            </button>
+        </form>
+    </div>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/microservices/01-oauth2-server/src/test/java/com/example/oauth2server/Oauth2ServerApplicationTests.java b/microservices/01-oauth2-server/src/test/java/com/example/oauth2server/Oauth2ServerApplicationTests.java
new file mode 100644
index 0000000..507215a
--- /dev/null
+++ b/microservices/01-oauth2-server/src/test/java/com/example/oauth2server/Oauth2ServerApplicationTests.java
@@ -0,0 +1,13 @@
+package com.example.oauth2server;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Oauth2ServerApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
-- 
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