Feature/921 read hibernate config from application properties

backend/src/main/java/ch/puzzle/okr/OkrApplication.java

@@ -1,16 +1,19 @@
 package ch.puzzle.okr;
 
 import ch.puzzle.okr.service.clientconfig.ClientCustomizationProperties;
-import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
 @EnableScheduling
 @EnableConfigurationProperties(ClientCustomizationProperties.class)
 public class OkrApplication {
     public static void main(String[] args) {
-        SpringApplication.run(OkrApplication.class, args);
+
+        new SpringApplicationBuilder(OkrApplication.class) //
+                .initializers(new OkrApplicationContextInitializer()) //
+                .run(args);
     }
 }

backend/src/main/java/ch/puzzle/okr/OkrApplicationContextInitializer.java

@@ -0,0 +1,21 @@
+package ch.puzzle.okr;
+
+import ch.puzzle.okr.multitenancy.listener.HibernateContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class OkrApplicationContextInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+    private static final Logger logger = LoggerFactory.getLogger(OkrApplicationContextInitializer.class);
+
+    @Override
+    public void initialize(ConfigurableApplicationContext applicationContext) {
+        logger.info("Loading hibernate configuration from application properties");
+        HibernateContext.cacheHibernateProperties(applicationContext.getEnvironment());
+    }
+
+}

backend/src/main/java/ch/puzzle/okr/multitenancy/AbstractSchemaMultiTenantConnectionProvider.java → backend/src/main/java/ch/puzzle/okr/multitenancy/SchemaMultiTenantConnectionProvider.java

@@ -1,28 +1,28 @@
 package ch.puzzle.okr.multitenancy;
 
 import ch.puzzle.okr.exception.ConnectionProviderException;
+import ch.puzzle.okr.multitenancy.listener.HibernateContext;
 import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl;
 import org.hibernate.engine.jdbc.connections.spi.AbstractMultiTenantConnectionProvider;
 import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.IOException;
 import java.sql.Connection;
 import java.sql.SQLException;
 import java.text.MessageFormat;
 import java.util.*;
 
 import static ch.puzzle.okr.multitenancy.TenantContext.DEFAULT_TENANT_ID;
 
-public abstract class AbstractSchemaMultiTenantConnectionProvider
-        extends AbstractMultiTenantConnectionProvider<String> {
-    private static final Logger logger = LoggerFactory.getLogger(AbstractSchemaMultiTenantConnectionProvider.class);
+public class SchemaMultiTenantConnectionProvider extends AbstractMultiTenantConnectionProvider<String> {
+
+    private static final Logger logger = LoggerFactory.getLogger(SchemaMultiTenantConnectionProvider.class);
 
     final Map<String, ConnectionProvider> connectionProviderMap;
 
-    public AbstractSchemaMultiTenantConnectionProvider() {
+    public SchemaMultiTenantConnectionProvider() {
         this.connectionProviderMap = new HashMap<>();
     }
 
@@ -80,21 +80,13 @@ private ConnectionProvider createConnectionProvider(String tenantIdentifier) {
     }
 
     protected Properties getHibernatePropertiesForTenantIdentifier(String tenantIdentifier) {
-        try {
-            Properties properties = getPropertiesFromFilePaths();
-            if (!Objects.equals(tenantIdentifier, DEFAULT_TENANT_ID)) {
-                properties.put(AvailableSettings.DEFAULT_SCHEMA, MessageFormat.format("okr_{0}", tenantIdentifier));
-            }
-            return properties;
-        } catch (IOException e) {
-            throw new RuntimeException(
-                    String.format("Cannot open hibernate properties: %s)", this.getHibernatePropertiesFilePaths()));
+        Properties properties = getHibernateProperties();
+        if (properties == null || properties.isEmpty()) {
+            throw new RuntimeException("Cannot load hibernate properties from application.properties)");
+        }
+        if (!Objects.equals(tenantIdentifier, DEFAULT_TENANT_ID)) {
+            properties.put(AvailableSettings.DEFAULT_SCHEMA, MessageFormat.format("okr_{0}", tenantIdentifier));
         }
-    }
-
-    protected Properties getPropertiesFromFilePaths() throws IOException {
-        Properties properties = new Properties();
-        properties.load(getClass().getResourceAsStream(this.getHibernatePropertiesFilePaths()));
         return properties;
     }
 
@@ -118,5 +110,7 @@ private Map<String, Object> convertPropertiesToMap(Properties properties) {
         return configProperties;
     }
 
-    protected abstract String getHibernatePropertiesFilePaths();
+    protected Properties getHibernateProperties() {
+        return HibernateContext.getHibernateConfig();
+    }
 }

backend/src/main/java/ch/puzzle/okr/multitenancy/listener/HibernateContext.java

@@ -0,0 +1,52 @@
+package ch.puzzle.okr.multitenancy.listener;
+
+import org.springframework.core.env.ConfigurableEnvironment;
+
+import java.util.Properties;
+
+public class HibernateContext {
+    public static final String HIBERNATE_CONNECTION_URL = "hibernate.connection.url";
+    public static final String HIBERNATE_CONNECTION_USERNAME = "hibernate.connection.username";
+    public static final String HIBERNATE_CONNECTION_PASSWORD = "hibernate.connection.password";
+    public static final String HIBERNATE_MULTITENANCY = "hibernate.multiTenancy";
+
+    public static String SPRING_DATASOURCE_URL = "spring.datasource.url";
+    public static String SPRING_DATASOURCE_USERNAME = "spring.datasource.username";
+    public static String SPRING_DATASOURCE_PASSWORD = "spring.datasource.password";
+
+    public record DbConfig(String url, String username, String password, String multiTenancy) {
+    }
+
+    private static DbConfig cachedHibernateConfig;
+
+    public static void setHibernateConfig(DbConfig dbConfig) {
+        cachedHibernateConfig = dbConfig;
+    }
+
+    public static Properties getHibernateConfig() {
+        return getConfigAsProperties(cachedHibernateConfig);
+    }
+
+    public static Properties getConfigAsProperties(DbConfig dbConfig) {
+        Properties properties = new Properties();
+        properties.put(HibernateContext.HIBERNATE_CONNECTION_URL, dbConfig.url());
+        properties.put(HibernateContext.HIBERNATE_CONNECTION_USERNAME, dbConfig.username());
+        properties.put(HibernateContext.HIBERNATE_CONNECTION_PASSWORD, dbConfig.password());
+        properties.put(HibernateContext.HIBERNATE_MULTITENANCY, dbConfig.multiTenancy());
+        properties.put(HibernateContext.SPRING_DATASOURCE_URL, dbConfig.url());
+        properties.put(HibernateContext.SPRING_DATASOURCE_USERNAME, dbConfig.username());
+        properties.put(HibernateContext.SPRING_DATASOURCE_PASSWORD, dbConfig.password());
+        return properties;
+    }
+
+    public static void cacheHibernateProperties(ConfigurableEnvironment environment) {
+        String url = environment.getProperty(HibernateContext.HIBERNATE_CONNECTION_URL);
+        String username = environment.getProperty(HibernateContext.HIBERNATE_CONNECTION_USERNAME);
+        String password = environment.getProperty(HibernateContext.HIBERNATE_CONNECTION_PASSWORD);
+        String multiTenancy = environment.getProperty(HibernateContext.HIBERNATE_MULTITENANCY);
+
+        HibernateContext.DbConfig h2DbConfig = new HibernateContext.DbConfig(url, username, password, multiTenancy);
+        HibernateContext.setHibernateConfig(h2DbConfig);
+    }
+
+}

backend/src/main/resources/application-dev.properties

@@ -13,6 +13,12 @@ spring.flyway.locations=classpath:db/migration,classpath:db/data-migration,class
 okr.tenant-ids=pitc,acme
 okr.datasource.driver-class-name=org.postgresql.Driver
 
+# hibernate
+hibernate.connection.url=jdbc:postgresql://localhost:5432/okr
+hibernate.connection.username=user
+hibernate.connection.password=pwd
+hibernate.multiTenancy=SCHEMA
+
 # pitc
 okr.tenants.pitc.datasource.url=jdbc:postgresql://localhost:5432/okr
 okr.tenants.pitc.datasource.username=pitc

backend/src/main/resources/application-integration-test.properties

@@ -16,6 +16,12 @@ spring.flyway.locations=classpath:db/h2-db/database-h2-schema,classpath:db/h2-db
 okr.tenant-ids=pitc,acme
 okr.datasource.driver-class-name=org.h2.Driver
 
+# hibernate
+hibernate.connection.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1;
+hibernate.connection.username=user
+hibernate.connection.password=sa
+hibernate.multiTenancy=SCHEMA
+
 # pitc
 okr.tenants.pitc.datasource.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1;INIT=CREATE SCHEMA IF NOT EXISTS okr_pitc
 okr.tenants.pitc.datasource.username=user
@@ -35,5 +41,3 @@ okr.tenants.acme.user.champion.emails=peggimann@puzzle.ch,wunderland@puzzle.ch
 okr.tenants.acme.security.oauth2.resourceserver.jwt.jwk-set-uri=http://localhost:8544/realms/pitc/protocol/openid-connect/certs
 okr.tenants.acme.security.oauth2.frontend.issuer-url=http://localhost:8544/realms/pitc
 okr.tenants.acme.security.oauth2.frontend.client-id=acme_okr_staging
-
-spring.jpa.properties.hibernate.multi_tenant_connection_provider=ch.puzzle.okr.multitenancy.SchemaMultiTenantConnectionProviderH2

backend/src/main/resources/application.properties

@@ -46,7 +46,7 @@ okr.jwt.claim.email=email
 
 spring.jpa.properties.hibernate.multiTenancy=SCHEMA
 spring.jpa.properties.hibernate.tenant_identifier_resolver=ch.puzzle.okr.multitenancy.CurrentTenantIdentifierResolverImpl
-spring.jpa.properties.hibernate.multi_tenant_connection_provider=ch.puzzle.okr.multitenancy.SchemaMultiTenantConnectionProviderPGSQL
+spring.jpa.properties.hibernate.multi_tenant_connection_provider=ch.puzzle.okr.multitenancy.SchemaMultiTenantConnectionProvider
 
 okr.clientcustomization.favicon=assets/favicon.png
 okr.clientcustomization.logo=assets/images/okr-logo.svg

backend/src/test/java/ch/puzzle/okr/multitenancy/SchemaMultiTenantConnectionProviderInternalsTest.java

@@ -1,13 +1,11 @@
 package ch.puzzle.okr.multitenancy;
 
 import ch.puzzle.okr.exception.ConnectionProviderException;
-import org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl;
 import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
-import java.io.IOException;
 import java.util.Properties;
 
 import static org.mockito.Mockito.mock;
@@ -16,25 +14,11 @@ public class SchemaMultiTenantConnectionProviderInternalsTest {
 
     private static final String TENANT_ID = "pitc";
 
-    private static class BasicConnectionProviderMock extends AbstractSchemaMultiTenantConnectionProvider {
-        @Override
-        protected String getHibernatePropertiesFilePaths() {
-            return null;
-        }
+    private static class ConfigurableConnectionProviderMock extends SchemaMultiTenantConnectionProvider {
 
         @Override
-        protected DriverManagerConnectionProviderImpl getDriverManagerConnectionProviderImpl() {
-            return mock(DriverManagerConnectionProviderImpl.class);
-        }
-    }
-
-    private static class ConfigurableConnectionProviderMock extends BasicConnectionProviderMock {
-
-        @Override
-        protected Properties getPropertiesFromFilePaths() {
-            Properties properties = new Properties();
-            properties.put("hibernate.connection.url", "no_value");
-            return properties;
+        protected Properties getHibernateProperties() {
+            return new Properties();
         }
 
         public void registerProvider(String tenantIdentifier, ConnectionProvider connectionProvider) {
@@ -56,19 +40,6 @@ void getConnectionProviderReturnConnectionProviderIfTenantIdIsRegistered() {
         Assertions.assertNotNull(foundConnectionProvider);
     }
 
-    @DisplayName("getConnectionProvider() creates ConnectionProvider if TenantId is not registered")
-    @Test
-    void getConnectionProviderCreatesConnectionProviderIfTenantIdIsNotRegistered() {
-        // arrange
-        ConfigurableConnectionProviderMock mockProvider = new ConfigurableConnectionProviderMock();
-
-        // act
-        ConnectionProvider notFoundConnectionProvider = mockProvider.getConnectionProvider(TENANT_ID);
-
-        // assert
-        Assertions.assertNotNull(notFoundConnectionProvider);
-    }
-
     @DisplayName("getConnectionProvider() throws Exception when lookup TenantId is null")
     @Test
     void getConnectionProviderThrowsExceptionWhenLookupTenantIdIsNull() {
@@ -107,17 +78,11 @@ void getAnyConnectionProviderReturnConnectionProviderForTenantIdPublic() {
         Assertions.assertNotNull(foundConnectionProvider);
     }
 
-    @DisplayName("throws a RuntimeException when getPropertiesFromFilePaths() throws an IOException")
+    @DisplayName("getConnectionProviderShouldThrowRuntimeExceptionWhenNoPropertiesAreFound")
     @Test
-    void throwsRuntimeExceptionWhenGetPropertiesFromFilePathsThrowsIOException() {
-        BasicConnectionProviderMock mockProviderWhichThrowsIOException = new BasicConnectionProviderMock() {
-            @Override
-            protected Properties getPropertiesFromFilePaths() throws IOException {
-                throw new IOException("no properties found");
-            }
-        };
-
-        Assertions.assertThrows(RuntimeException.class,
-                () -> mockProviderWhichThrowsIOException.getConnectionProvider(TENANT_ID));
+    void getConnectionProviderShouldThrowRuntimeExceptionWhenNoPropertiesAreFound() {
+        ConfigurableConnectionProviderMock mockProvider = new ConfigurableConnectionProviderMock();
+
+        Assertions.assertThrows(RuntimeException.class, () -> mockProvider.getConnectionProvider(TENANT_ID));
     }
 }