Refactor ContainerConnectionDetailsFactory classes

Update `ContainerConnectionDetailsFactory` so that they consistently
extend `ContainerConnectionDetails`. The container is also no longer
accessible from the `ContainerConnectionSource` and is never used
during the construction of `ConnectionDetails` instances.

See gh-35168

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/ContainerConnectionDetailsFactory.java

@@ -34,7 +34,7 @@ import org.springframework.util.ObjectUtils;
  * {@link ConnectionDetails} from a {@link ContainerConnectionSource}.
  *
  * @param <D> the connection details type
- * @param <C> the generic container type
+ * @param <C> the container type
  * @author Moritz Halbritter
  * @author Andy Wilkinson
  * @author Phillip Webb
@@ -110,23 +110,30 @@ public abstract class ContainerConnectionDetailsFactory<D extends ConnectionDeta
 	/**
 	 * Convenient base class for {@link ConnectionDetails} results that are backed by a
 	 * {@link ContainerConnectionSource}.
+	 *
+	 * @param <C> the container type
 	 */
-	protected static class ContainerConnectionDetails implements ConnectionDetails, OriginProvider {
+	protected static class ContainerConnectionDetails<C extends Container<?>>
+			implements ConnectionDetails, OriginProvider {
 
-		private final Origin origin;
+		private final ContainerConnectionSource<C> source;
 
 		/**
 		 * Create a new {@link ContainerConnectionDetails} instance.
 		 * @param source the source {@link ContainerConnectionSource}
 		 */
-		protected ContainerConnectionDetails(ContainerConnectionSource<?> source) {
+		protected ContainerConnectionDetails(ContainerConnectionSource<C> source) {
 			Assert.notNull(source, "Source must not be null");
-			this.origin = source.getOrigin();
+			this.source = source;
+		}
+
+		protected final C getContainer() {
+			return this.source.getContainer();
 		}
 
 		@Override
 		public Origin getOrigin() {
-			return this.origin;
+			return this.source.getOrigin();
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/ContainerConnectionSource.java

@@ -118,11 +118,7 @@ public final class ContainerConnectionSource<C extends Container<?>> implements
 		return this.origin;
 	}
 
-	/**
-	 * Return the {@link Container} that implements the service being connected to.
-	 * @return the {@link Container} providing the service
-	 */
-	public C getContainer() {
+	C getContainer() {
 		return this.container;
 	}
 

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/amqp/RabbitContainerConnectionDetailsFactory.java

@@ -47,29 +47,26 @@ class RabbitContainerConnectionDetailsFactory
 	/**
 	 * {@link RabbitConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class RabbitMqContainerConnectionDetails extends ContainerConnectionDetails
+	private static final class RabbitMqContainerConnectionDetails extends ContainerConnectionDetails<RabbitMQContainer>
 			implements RabbitConnectionDetails {
 
-		private final RabbitMQContainer container;
-
 		private RabbitMqContainerConnectionDetails(ContainerConnectionSource<RabbitMQContainer> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public String getUsername() {
-			return this.container.getAdminUsername();
+			return getContainer().getAdminUsername();
 		}
 
 		@Override
 		public String getPassword() {
-			return this.container.getAdminPassword();
+			return getContainer().getAdminPassword();
 		}
 
 		@Override
 		public List<Address> getAddresses() {
-			URI uri = URI.create(this.container.getAmqpUrl());
+			URI uri = URI.create(getContainer().getAmqpUrl());
 			return List.of(new Address(uri.getHost(), uri.getPort()));
 		}
 

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/cassandra/CassandraContainerConnectionDetailsFactory.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.testcontainers.service.connection.cassandra;
 
+import java.net.InetSocketAddress;
 import java.util.List;
 
 import org.testcontainers.containers.CassandraContainer;
@@ -46,35 +47,32 @@ class CassandraContainerConnectionDetailsFactory
 	/**
 	 * {@link CassandraConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class CassandraContainerConnectionDetails extends ContainerConnectionDetails
-			implements CassandraConnectionDetails {
-
-		private final CassandraContainer<?> container;
+	private static final class CassandraContainerConnectionDetails
+			extends ContainerConnectionDetails<CassandraContainer<?>> implements CassandraConnectionDetails {
 
 		private CassandraContainerConnectionDetails(ContainerConnectionSource<CassandraContainer<?>> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public List<Node> getContactPoints() {
-			return List.of(new Node(this.container.getContactPoint().getHostString(),
-					this.container.getContactPoint().getPort()));
+			InetSocketAddress contactPoint = getContainer().getContactPoint();
+			return List.of(new Node(contactPoint.getHostString(), contactPoint.getPort()));
 		}
 
 		@Override
 		public String getUsername() {
-			return this.container.getUsername();
+			return getContainer().getUsername();
 		}
 
 		@Override
 		public String getPassword() {
-			return this.container.getPassword();
+			return getContainer().getPassword();
 		}
 
 		@Override
 		public String getLocalDatacenter() {
-			return this.container.getLocalDatacenter();
+			return getContainer().getLocalDatacenter();
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/couchbase/CouchbaseContainerConnectionDetailsFactory.java

@@ -44,29 +44,26 @@ class CouchbaseContainerConnectionDetailsFactory
 	/**
 	 * {@link CouchbaseConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class CouchbaseContainerConnectionDetails extends ContainerConnectionDetails
-			implements CouchbaseConnectionDetails {
-
-		private final CouchbaseContainer container;
+	private static final class CouchbaseContainerConnectionDetails
+			extends ContainerConnectionDetails<CouchbaseContainer> implements CouchbaseConnectionDetails {
 
 		private CouchbaseContainerConnectionDetails(ContainerConnectionSource<CouchbaseContainer> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public String getUsername() {
-			return this.container.getUsername();
+			return getContainer().getUsername();
 		}
 
 		@Override
 		public String getPassword() {
-			return this.container.getPassword();
+			return getContainer().getPassword();
 		}
 
 		@Override
 		public String getConnectionString() {
-			return this.container.getConnectionString();
+			return getContainer().getConnectionString();
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/elasticsearch/ElasticsearchContainerConnectionDetailsFactory.java

@@ -50,20 +50,18 @@ class ElasticsearchContainerConnectionDetailsFactory
 	 * {@link ElasticsearchConnectionDetails} backed by a
 	 * {@link ContainerConnectionSource}.
 	 */
-	private static final class ElasticsearchContainerConnectionDetails extends ContainerConnectionDetails
-			implements ElasticsearchConnectionDetails {
-
-		private final List<Node> nodes;
+	private static final class ElasticsearchContainerConnectionDetails
+			extends ContainerConnectionDetails<ElasticsearchContainer> implements ElasticsearchConnectionDetails {
 
 		private ElasticsearchContainerConnectionDetails(ContainerConnectionSource<ElasticsearchContainer> source) {
 			super(source);
-			this.nodes = List.of(new Node(source.getContainer().getHost(),
-					source.getContainer().getMappedPort(DEFAULT_PORT), Protocol.HTTP, null, null));
 		}
 
 		@Override
 		public List<Node> getNodes() {
-			return this.nodes;
+			String host = getContainer().getHost();
+			Integer port = getContainer().getMappedPort(DEFAULT_PORT);
+			return List.of(new Node(host, port, Protocol.HTTP, null, null));
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/flyway/FlywayContainerConnectionDetailsFactory.java

@@ -42,34 +42,31 @@ class FlywayContainerConnectionDetailsFactory
 	/**
 	 * {@link FlywayConnectionDetails} backed by a {@link JdbcDatabaseContainer}.
 	 */
-	private static final class FlywayContainerConnectionDetails extends ContainerConnectionDetails
-			implements FlywayConnectionDetails {
-
-		private final JdbcDatabaseContainer<?> container;
+	private static final class FlywayContainerConnectionDetails
+			extends ContainerConnectionDetails<JdbcDatabaseContainer<?>> implements FlywayConnectionDetails {
 
 		private FlywayContainerConnectionDetails(ContainerConnectionSource<JdbcDatabaseContainer<?>> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public String getUsername() {
-			return this.container.getUsername();
+			return getContainer().getUsername();
 		}
 
 		@Override
 		public String getPassword() {
-			return this.container.getPassword();
+			return getContainer().getPassword();
 		}
 
 		@Override
 		public String getJdbcUrl() {
-			return this.container.getJdbcUrl();
+			return getContainer().getJdbcUrl();
 		}
 
 		@Override
 		public String getDriverClassName() {
-			return this.container.getDriverClassName();
+			return getContainer().getDriverClassName();
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/jdbc/JdbcContainerConnectionDetailsFactory.java

@@ -43,34 +43,31 @@ class JdbcContainerConnectionDetailsFactory
 	/**
 	 * {@link JdbcConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class JdbcContainerConnectionDetails extends ContainerConnectionDetails
-			implements JdbcConnectionDetails {
-
-		private final JdbcDatabaseContainer<?> container;
+	private static final class JdbcContainerConnectionDetails
+			extends ContainerConnectionDetails<JdbcDatabaseContainer<?>> implements JdbcConnectionDetails {
 
 		private JdbcContainerConnectionDetails(ContainerConnectionSource<JdbcDatabaseContainer<?>> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public String getUsername() {
-			return this.container.getUsername();
+			return getContainer().getUsername();
 		}
 
 		@Override
 		public String getPassword() {
-			return this.container.getPassword();
+			return getContainer().getPassword();
 		}
 
 		@Override
 		public String getJdbcUrl() {
-			return this.container.getJdbcUrl();
+			return getContainer().getJdbcUrl();
 		}
 
 		@Override
 		public String getDriverClassName() {
-			return this.container.getDriverClassName();
+			return getContainer().getDriverClassName();
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/kafka/KafkaContainerConnectionDetailsFactory.java

@@ -45,19 +45,16 @@ class KafkaContainerConnectionDetailsFactory
 	/**
 	 * {@link KafkaConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class KafkaContainerConnectionDetails extends ContainerConnectionDetails
+	private static final class KafkaContainerConnectionDetails extends ContainerConnectionDetails<KafkaContainer>
 			implements KafkaConnectionDetails {
 
-		private final KafkaContainer container;
-
 		private KafkaContainerConnectionDetails(ContainerConnectionSource<KafkaContainer> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public List<Node> getBootstrapNodes() {
-			URI uri = URI.create(this.container.getBootstrapServers());
+			URI uri = URI.create(getContainer().getBootstrapServers());
 			return List.of(new Node(uri.getHost(), uri.getPort()));
 		}
 

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/liquibase/LiquibaseContainerConnectionDetailsFactory.java

@@ -42,34 +42,31 @@ class LiquibaseContainerConnectionDetailsFactory
 	/**
 	 * {@link LiquibaseConnectionDetails} backed by a {@link JdbcDatabaseContainer}.
 	 */
-	private static final class LiquibaseContainerConnectionDetails extends ContainerConnectionDetails
-			implements LiquibaseConnectionDetails {
-
-		private final JdbcDatabaseContainer<?> container;
+	private static final class LiquibaseContainerConnectionDetails
+			extends ContainerConnectionDetails<JdbcDatabaseContainer<?>> implements LiquibaseConnectionDetails {
 
 		private LiquibaseContainerConnectionDetails(ContainerConnectionSource<JdbcDatabaseContainer<?>> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public String getUsername() {
-			return this.container.getUsername();
+			return getContainer().getUsername();
 		}
 
 		@Override
 		public String getPassword() {
-			return this.container.getPassword();
+			return getContainer().getPassword();
 		}
 
 		@Override
 		public String getJdbcUrl() {
-			return this.container.getJdbcUrl();
+			return getContainer().getJdbcUrl();
 		}
 
 		@Override
 		public String getDriverClassName() {
-			return this.container.getDriverClassName();
+			return getContainer().getDriverClassName();
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/mongo/MongoContainerConnectionDetailsFactory.java

@@ -47,19 +47,16 @@ class MongoContainerConnectionDetailsFactory
 	/**
 	 * {@link MongoConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class MongoContainerConnectionDetails extends ContainerConnectionDetails
+	private static final class MongoContainerConnectionDetails extends ContainerConnectionDetails<MongoDBContainer>
 			implements MongoConnectionDetails {
 
-		private final ConnectionString connectionString;
-
 		private MongoContainerConnectionDetails(ContainerConnectionSource<MongoDBContainer> source) {
 			super(source);
-			this.connectionString = new ConnectionString(source.getContainer().getReplicaSetUrl());
 		}
 
 		@Override
 		public ConnectionString getConnectionString() {
-			return this.connectionString;
+			return new ConnectionString(getContainer().getReplicaSetUrl());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/neo4j/Neo4jContainerConnectionDetailsFactory.java

@@ -51,24 +51,21 @@ class Neo4jContainerConnectionDetailsFactory
 	/**
 	 * {@link Neo4jConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class Neo4jContainerConnectionDetails extends ContainerConnectionDetails
+	private static final class Neo4jContainerConnectionDetails extends ContainerConnectionDetails<Neo4jContainer<?>>
 			implements Neo4jConnectionDetails {
 
-		private final Neo4jContainer<?> container;
-
 		private Neo4jContainerConnectionDetails(ContainerConnectionSource<Neo4jContainer<?>> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public URI getUri() {
-			return URI.create(this.container.getBoltUrl());
+			return URI.create(getContainer().getBoltUrl());
 		}
 
 		@Override
 		public AuthToken getAuthToken() {
-			String password = this.container.getAdminPassword();
+			String password = getContainer().getAdminPassword();
 			return (password != null) ? AuthTokens.basic("neo4j", password) : AuthTokens.none();
 		}
 

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/r2dbc/MariaDbR2dbcContainerConnectionDetailsFactory.java

@@ -42,23 +42,22 @@ class MariaDbR2dbcContainerConnectionDetailsFactory
 
 	@Override
 	public R2dbcConnectionDetails getContainerConnectionDetails(ContainerConnectionSource<MariaDBContainer<?>> source) {
-		return new R2dbcDatabaseContainerConnectionDetails(source.getContainer());
+		return new MariaDbR2dbcDatabaseContainerConnectionDetails(source);
 	}
 
 	/**
 	 * {@link R2dbcConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class R2dbcDatabaseContainerConnectionDetails implements R2dbcConnectionDetails {
+	private static final class MariaDbR2dbcDatabaseContainerConnectionDetails
+			extends ContainerConnectionDetails<MariaDBContainer<?>> implements R2dbcConnectionDetails {
 
-		private final MariaDBContainer<?> container;
-
-		private R2dbcDatabaseContainerConnectionDetails(MariaDBContainer<?> container) {
-			this.container = container;
+		private MariaDbR2dbcDatabaseContainerConnectionDetails(ContainerConnectionSource<MariaDBContainer<?>> source) {
+			super(source);
 		}
 
 		@Override
 		public ConnectionFactoryOptions getConnectionFactoryOptions() {
-			return MariaDBR2DBCDatabaseContainer.getOptions(this.container);
+			return MariaDBR2DBCDatabaseContainer.getOptions(getContainer());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/r2dbc/MySqlR2dbcContainerConnectionDetailsFactory.java

@@ -42,23 +42,22 @@ class MySqlR2dbcContainerConnectionDetailsFactory
 
 	@Override
 	public R2dbcConnectionDetails getContainerConnectionDetails(ContainerConnectionSource<MySQLContainer<?>> source) {
-		return new R2dbcDatabaseContainerConnectionDetails(source.getContainer());
+		return new MySqlR2dbcDatabaseContainerConnectionDetails(source);
 	}
 
 	/**
 	 * {@link R2dbcConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class R2dbcDatabaseContainerConnectionDetails implements R2dbcConnectionDetails {
+	private static final class MySqlR2dbcDatabaseContainerConnectionDetails
+			extends ContainerConnectionDetails<MySQLContainer<?>> implements R2dbcConnectionDetails {
 
-		private final MySQLContainer<?> container;
-
-		private R2dbcDatabaseContainerConnectionDetails(MySQLContainer<?> container) {
-			this.container = container;
+		private MySqlR2dbcDatabaseContainerConnectionDetails(ContainerConnectionSource<MySQLContainer<?>> source) {
+			super(source);
 		}
 
 		@Override
 		public ConnectionFactoryOptions getConnectionFactoryOptions() {
-			return MySQLR2DBCDatabaseContainer.getOptions(this.container);
+			return MySQLR2DBCDatabaseContainer.getOptions(getContainer());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/r2dbc/OracleR2dbcContainerConnectionDetailsFactory.java

@@ -46,19 +46,16 @@ class OracleR2dbcContainerConnectionDetailsFactory
 	/**
 	 * {@link R2dbcConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class R2dbcDatabaseContainerConnectionDetails extends ContainerConnectionDetails
-			implements R2dbcConnectionDetails {
-
-		private final OracleContainer container;
+	private static final class R2dbcDatabaseContainerConnectionDetails
+			extends ContainerConnectionDetails<OracleContainer> implements R2dbcConnectionDetails {
 
 		private R2dbcDatabaseContainerConnectionDetails(ContainerConnectionSource<OracleContainer> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public ConnectionFactoryOptions getConnectionFactoryOptions() {
-			return OracleR2DBCDatabaseContainer.getOptions(this.container);
+			return OracleR2DBCDatabaseContainer.getOptions(getContainer());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/r2dbc/PostgresR2dbcContainerConnectionDetailsFactory.java

@@ -43,23 +43,22 @@ class PostgresR2dbcContainerConnectionDetailsFactory
 	@Override
 	public R2dbcConnectionDetails getContainerConnectionDetails(
 			ContainerConnectionSource<PostgreSQLContainer<?>> source) {
-		return new R2dbcDatabaseContainerConnectionDetails(source.getContainer());
+		return new PostgresR2dbcDatabaseContainerConnectionDetails(source);
 	}
 
 	/**
 	 * {@link R2dbcConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class R2dbcDatabaseContainerConnectionDetails implements R2dbcConnectionDetails {
+	private static final class PostgresR2dbcDatabaseContainerConnectionDetails
+			extends ContainerConnectionDetails<PostgreSQLContainer<?>> implements R2dbcConnectionDetails {
 
-		private final PostgreSQLContainer<?> container;
-
-		private R2dbcDatabaseContainerConnectionDetails(PostgreSQLContainer<?> container) {
-			this.container = container;
+		PostgresR2dbcDatabaseContainerConnectionDetails(ContainerConnectionSource<PostgreSQLContainer<?>> source) {
+			super(source);
 		}
 
 		@Override
 		public ConnectionFactoryOptions getConnectionFactoryOptions() {
-			return PostgreSQLR2DBCDatabaseContainer.getOptions(this.container);
+			return PostgreSQLR2DBCDatabaseContainer.getOptions(getContainer());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/r2dbc/SqlServerR2dbcContainerConnectionDetailsFactory.java

@@ -43,23 +43,23 @@ class SqlServerR2dbcContainerConnectionDetailsFactory
 	@Override
 	public R2dbcConnectionDetails getContainerConnectionDetails(
 			ContainerConnectionSource<MSSQLServerContainer<?>> source) {
-		return new R2dbcDatabaseContainerConnectionDetails(source.getContainer());
+		return new MsSqlServerR2dbcDatabaseContainerConnectionDetails(source);
 	}
 
 	/**
 	 * {@link R2dbcConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class R2dbcDatabaseContainerConnectionDetails implements R2dbcConnectionDetails {
+	private static final class MsSqlServerR2dbcDatabaseContainerConnectionDetails
+			extends ContainerConnectionDetails<MSSQLServerContainer<?>> implements R2dbcConnectionDetails {
 
-		private final MSSQLServerContainer<?> container;
-
-		private R2dbcDatabaseContainerConnectionDetails(MSSQLServerContainer<?> container) {
-			this.container = container;
+		private MsSqlServerR2dbcDatabaseContainerConnectionDetails(
+				ContainerConnectionSource<MSSQLServerContainer<?>> source) {
+			super(source);
 		}
 
 		@Override
 		public ConnectionFactoryOptions getConnectionFactoryOptions() {
-			return MSSQLR2DBCDatabaseContainer.getOptions(this.container);
+			return MSSQLR2DBCDatabaseContainer.getOptions(getContainer());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/redis/RedisContainerConnectionDetailsFactory.java

@@ -48,20 +48,16 @@ class RedisContainerConnectionDetailsFactory
 	/**
 	 * {@link RedisConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class RedisContainerConnectionDetails extends ContainerConnectionDetails
+	private static final class RedisContainerConnectionDetails extends ContainerConnectionDetails<Container<?>>
 			implements RedisConnectionDetails {
 
-		private final Standalone standalone;
-
 		private RedisContainerConnectionDetails(ContainerConnectionSource<Container<?>> source) {
 			super(source);
-			this.standalone = Standalone.of(source.getContainer().getHost(),
-					source.getContainer().getFirstMappedPort());
 		}
 
 		@Override
 		public Standalone getStandalone() {
-			return this.standalone;
+			return Standalone.of(getContainer().getHost(), getContainer().getFirstMappedPort());
 		}
 
 	}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/redpanda/RedpandaContainerConnectionDetailsFactory.java

@@ -44,19 +44,16 @@ class RedpandaContainerConnectionDetailsFactory
 	/**
 	 * {@link KafkaConnectionDetails} backed by a {@link ContainerConnectionSource}.
 	 */
-	private static final class RedpandaContainerConnectionDetails extends ContainerConnectionDetails
+	private static final class RedpandaContainerConnectionDetails extends ContainerConnectionDetails<RedpandaContainer>
 			implements KafkaConnectionDetails {
 
-		private final RedpandaContainer container;
-
 		private RedpandaContainerConnectionDetails(ContainerConnectionSource<RedpandaContainer> source) {
 			super(source);
-			this.container = source.getContainer();
 		}
 
 		@Override
 		public List<Node> getBootstrapNodes() {
-			URI uri = URI.create(this.container.getBootstrapServers());
+			URI uri = URI.create(getContainer().getBootstrapServers());
 			return List.of(new Node(uri.getHost(), uri.getPort()));
 		}
 

spring-boot-project/spring-boot-testcontainers/src/test/java/org/springframework/boot/testcontainers/service/connection/ContainerConnectionDetailsFactoryTests.java

@@ -46,7 +46,7 @@ class ContainerConnectionDetailsFactoryTests {
 
 	private Origin origin;
 
-	private JdbcDatabaseContainer<?> container;
+	private PostgreSQLContainer<?> container;
 
 	private MergedAnnotation<ServiceConnection> annotation;
 
@@ -127,10 +127,10 @@ class ContainerConnectionDetailsFactoryTests {
 			return new TestContainerConnectionDetails(source);
 		}
 
-		static class TestContainerConnectionDetails extends ContainerConnectionDetails
-				implements JdbcConnectionDetails {
+		private static final class TestContainerConnectionDetails
+				extends ContainerConnectionDetails<JdbcDatabaseContainer<?>> implements JdbcConnectionDetails {
 
-			TestContainerConnectionDetails(ContainerConnectionSource<?> source) {
+			private TestContainerConnectionDetails(ContainerConnectionSource<JdbcDatabaseContainer<?>> source) {
 				super(source);
 			}