Add Session Management samples

servlet/spring-boot/java/session-management/maximum-sessions/src/integTest/java/com/example/maximumsessions/MaximumSessionsTests.java

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+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License 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.example.maximumsessions;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.mock.web.MockHttpSession;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestBuilders.formLogin;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.unauthenticated;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureMockMvc
+public class MaximumSessionsTests {
+
+	@Autowired
+	private MockMvc mvc;
+
+	@Test
+	void loginOnSecondLoginThenFirstSessionTerminated() throws Exception {
+		// @formatter:off
+		MvcResult mvcResult = this.mvc.perform(formLogin())
+				.andExpect(authenticated())
+				.andReturn();
+
+		MockHttpSession firstLoginSession = (MockHttpSession) mvcResult.getRequest().getSession();
+
+		this.mvc.perform(get("/").session(firstLoginSession))
+				.andExpect(authenticated());
+
+		this.mvc.perform(formLogin()).andExpect(authenticated());
+
+		// first session is terminated by second login
+		this.mvc.perform(get("/").session(firstLoginSession))
+				.andExpect(unauthenticated());
+		// @formatter:on
+	}
+
+}

servlet/spring-boot/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/HelloController.java

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+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License 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.example.maximumsessions;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloController {
+
+	@GetMapping("/")
+	public String hello() {
+		return "hello";
+	}
+
+}

servlet/spring-boot/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/MaximumSessionsApplication.java

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+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License 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.example.maximumsessions;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MaximumSessionsApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(MaximumSessionsApplication.class, args);
+	}
+
+}

servlet/spring-boot/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/SecurityConfig.java

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+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License 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.example.maximumsessions;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.core.userdetails.User;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.provisioning.InMemoryUserDetailsManager;
+import org.springframework.security.web.SecurityFilterChain;
+
+import static org.springframework.security.config.Customizer.withDefaults;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+	@Bean
+	public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+		http.authorizeHttpRequests((authorizeRequests) -> authorizeRequests.anyRequest().authenticated())
+				.formLogin(withDefaults())
+				.sessionManagement((sessionManagement) -> sessionManagement.maximumSessions(1));
+		return http.build();
+	}
+
+	@Bean
+	public UserDetailsService userDetailsService() {
+		UserDetails user = User.withDefaultPasswordEncoder().username("user").password("password").roles("USER")
+				.build();
+		return new InMemoryUserDetailsManager(user);
+	}
+
+}

servlet/spring-boot/java/session-management/maximum-sessions/src/main/resources/application.properties

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+