Delay interaction with Lazy CqlSession bean until first usage

Though the CqlSession provided by the CassandraAutoConfiguration can
be lazy, the configuration for Data Cassandra triggers early bean
instantiation. This commit uses new APIs in Data Cassandra to make
use of the intended lazy bean initialization and therefore prevents
the application from failing to start up when Cassandra might not yet
be ready.

See gh-39948

Author: christophstrobl

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraDataAutoConfiguration.java

@@ -32,6 +32,7 @@
 import org.springframework.boot.autoconfigure.domain.EntityScanPackages;
 import org.springframework.boot.context.properties.bind.Binder;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.core.env.Environment;
 import org.springframework.data.cassandra.CassandraManagedTypes;
 import org.springframework.data.cassandra.SessionFactory;
@@ -54,6 +55,7 @@
  * @author Eddú Meléndez
  * @author Mark Paluch
  * @author Madhura Bhave
+ * @author Christoph Strobl
  * @since 1.3.0
  */
 @AutoConfiguration(after = CassandraAutoConfiguration.class)
@@ -63,7 +65,7 @@ public class CassandraDataAutoConfiguration {
 
 	private final CqlSession session;
 
-	public CassandraDataAutoConfiguration(CqlSession session) {
+	public CassandraDataAutoConfiguration(@Lazy CqlSession session) {
 		this.session = session;
 	}
 
@@ -95,7 +97,7 @@ public CassandraMappingContext cassandraMappingContext(CassandraManagedTypes cas
 	public CassandraConverter cassandraConverter(CassandraMappingContext mapping,
 			CassandraCustomConversions conversions) {
 		MappingCassandraConverter converter = new MappingCassandraConverter(mapping);
-		converter.setCodecRegistry(this.session.getContext().getCodecRegistry());
+		converter.setCodecRegistry(() -> this.session.getContext().getCodecRegistry());
 		converter.setCustomConversions(conversions);
 		converter.setUserTypeResolver(new SimpleUserTypeResolver(this.session));
 		return converter;