Defend against lambda transaction customizers

Update `TransactionManagerCustomizers` to deal directly with
`ClassCastExceptions` assuming that they are because a customizer is
implemented using a lambda.

See spring-projectsgh-7561

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/transaction/TransactionManagerCustomizers.java

@@ -20,6 +20,9 @@
 import java.util.Collection;
 import java.util.List;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
 import org.springframework.core.ResolvableType;
 import org.springframework.transaction.PlatformTransactionManager;
 
@@ -31,6 +34,9 @@
  */
 public class TransactionManagerCustomizers {
 
+	private static final Log logger = LogFactory
+			.getLog(TransactionManagerCustomizers.class);
+
 	private final List<PlatformTransactionManagerCustomizer<?>> customizers;
 
 	public TransactionManagerCustomizers(
@@ -56,7 +62,17 @@ public void customize(PlatformTransactionManager transactionManager) {
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	private void customize(PlatformTransactionManager transactionManager,
 			PlatformTransactionManagerCustomizer customizer) {
-		customizer.customize(transactionManager);
+		try {
+			customizer.customize(transactionManager);
+		}
+		catch (ClassCastException ex) {
+			// Possibly a lambda-defined listener which we could not resolve the generic
+			// event type for
+			if (logger.isDebugEnabled()) {
+				logger.debug("Non-matching transaction manager type for customizer: "
+						+ customizer, ex);
+			}
+		}
 	}
 
 }