add ways to run external session store with JDBC and store session da…

…ta in separate db

iam-login-service/pom.xml

@@ -87,7 +87,14 @@
       <groupId>org.springframework.session</groupId>
       <artifactId>spring-session-data-redis</artifactId>
     </dependency>
-
+    <dependency>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-data-jpa</artifactId>
+    </dependency>
+    <dependency>
+        <groupId>org.springframework.session</groupId>
+        <artifactId>spring-session-jdbc</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-redis</artifactId>

iam-login-service/src/main/java/it/infn/mw/iam/config/DataSourceConfig.java

@@ -0,0 +1,50 @@
+package it.infn.mw.iam.config;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.session.jdbc.config.annotation.SpringSessionDataSource;
+
+import com.zaxxer.hikari.HikariDataSource;
+
+@Configuration
+public class DataSourceConfig {
+    @Bean
+    @Primary
+    @ConfigurationProperties("spring.datasource")
+    @Qualifier("dataSource")
+    public DataSourceProperties dataSourceProperties() {
+        return new DataSourceProperties();
+    }
+
+    @Bean
+    @Primary
+    public HikariDataSource primaryDataSource(@Qualifier("dataSource") DataSourceProperties dataSourceProperties) {
+        return dataSourceProperties
+                .initializeDataSourceBuilder()
+                .type(HikariDataSource.class)
+                .build();
+    }
+
+    @Bean
+    @ConfigurationProperties("session.datasource")
+    @Qualifier("sessionDataSourceProperties")
+    @ConditionalOnProperty(name = "spring.session.store-type", havingValue = "jdbc")
+    public DataSourceProperties sessionDataSourceProperties() {
+        return new DataSourceProperties();
+    }
+    @Bean
+    @Qualifier("sessionDataSource")
+    @SpringSessionDataSource
+    @ConditionalOnProperty(name = "spring.session.store-type", havingValue = "jdbc")
+    public HikariDataSource sessionDataSource(@Qualifier("sessionDataSourceProperties") DataSourceProperties sessionDataSourceProperties) {
+        return sessionDataSourceProperties
+                .initializeDataSourceBuilder()
+                .type(HikariDataSource.class)
+                .build();
+    }
+}

iam-login-service/src/main/resources/application-jdbc-session.yml

@@ -0,0 +1,11 @@
+spring:
+  session:
+    store-type: jdbc
+    jdbc:
+      cleanup-cron: 0 */45 * * * *
+      table-name: SPRING_SESSION
+session:
+  datasource:
+    url: jdbc:mysql://${IAM_SESSION_DB_HOST:dev.local.io}:${IAM_SESSION_DB_PORT:3306}/${SESSION_DB_NAME:session}?useSSL=${IAM_SESSION_DB_USE_SSL:false}&allowPublicKeyRetrieval=true
+    username: ${SESSION_DB_USERNAME}
+    password: ${SESSION_DB_PASSWORD}