Add JDBC to Configurations section

Closes gh-2827

Closes gh-2829

spring-session-samples/spring-session-sample-boot-jdbc-json-attribute/src/test/java/sample/JdbcJsonAttributeTestApplication.java

@@ -0,0 +1,11 @@
+package sample;
+
+import org.springframework.boot.SpringApplication;
+
+public class JdbcJsonAttributeTestApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.from(JdbcJsonAttributeApplication::main).with(TestContainersConfig.class).run(args);
+	}
+
+}

spring-session-samples/spring-session-sample-boot-jdbc-json-attribute/src/test/java/sample/JdbcJsonAttributeTests.java

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+package sample;
+
+import java.sql.Types;
+import java.util.Base64;
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.servlet.http.Cookie;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+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.context.annotation.Import;
+import org.springframework.jdbc.core.simple.JdbcClient;
+import org.springframework.security.core.context.SecurityContext;
+import org.springframework.security.jackson2.SecurityJackson2Modules;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestBuilders.formLogin;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureMockMvc
+@Import(TestContainersConfig.class)
+public class JdbcJsonAttributeTests {
+
+	@Autowired
+	MockMvc mvc;
+
+	@Autowired
+	ObjectMapper objectMapper;
+
+	ObjectMapper objectMapperWithModules;
+
+	@Autowired
+	JdbcClient jdbcClient;
+
+	@BeforeEach
+	void setup() {
+		ObjectMapper copy = this.objectMapper.copy();
+		copy.registerModules(SecurityJackson2Modules.getModules(getClass().getClassLoader()));
+		this.objectMapperWithModules = copy;
+		this.jdbcClient.sql("DELETE FROM spring_session_attributes").update();
+		this.jdbcClient.sql("DELETE FROM spring_session").update();
+	}
+
+	@Test
+	void loginShouldSaveSecurityContextAsJson() throws Exception {
+		Cookie sessionCookie = this.mvc.perform(formLogin().user("user").password("password"))
+			.andExpect(authenticated())
+			.andReturn()
+			.getResponse()
+			.getCookie("SESSION");
+		String sessionId = new String(Base64.getDecoder().decode(sessionCookie.getValue()));
+		Object attributeBytes = this.jdbcClient.sql("""
+				SELECT attribute_bytes::text FROM spring_session_attributes
+				INNER JOIN spring_session s ON s.primary_id = session_primary_id
+				WHERE attribute_name = 'SPRING_SECURITY_CONTEXT'
+				AND s.session_id = :id
+				""").param("id", sessionId).query().singleValue();
+		SecurityContext securityContext = this.objectMapperWithModules.readValue((String) attributeBytes,
+				SecurityContext.class);
+		assertThat(securityContext).isNotNull();
+		assertThat(securityContext.getAuthentication().getName()).isEqualTo("user");
+	}
+
+	@Test
+	void loginWhenQueryUsingJsonbOperatorThenReturns() throws Exception {
+		this.mvc.perform(formLogin().user("user").password("password")).andExpect(authenticated());
+		Object attributeBytes = this.jdbcClient.sql("""
+				SELECT attribute_bytes::text FROM spring_session_attributes
+				WHERE attribute_bytes -> 'authentication' -> 'principal' ->> 'username' = 'user'
+				""").query().singleValue();
+		SecurityContext securityContext = this.objectMapperWithModules.readValue((String) attributeBytes,
+				SecurityContext.class);
+		assertThat(securityContext).isNotNull();
+		assertThat(securityContext.getAuthentication().getName()).isEqualTo("user");
+	}
+
+}

spring-session-samples/spring-session-sample-boot-jdbc-json-attribute/src/test/java/sample/TestContainersConfig.java

@@ -0,0 +1,26 @@
+package sample;
+
+import org.testcontainers.containers.PostgreSQLContainer;
+import org.testcontainers.utility.DockerImageName;
+
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.springframework.context.annotation.Bean;
+
+@TestConfiguration(proxyBeanMethods = false)
+public class TestContainersConfig {
+
+	static PostgreSQLContainer<?> postgresql = new PostgreSQLContainer<>(DockerImageName.parse("postgres:16.1"))
+		.withExposedPorts(5432);
+
+	static {
+		postgresql.start();
+	}
+
+	@Bean
+	@ServiceConnection
+	PostgreSQLContainer<?> postgresContainer() {
+		return postgresql;
+	}
+
+}