Rename TransactionSynchronizationManager#currentTransaction()

This commit renames currentTransaction() to forCurrentTransaction() for
greater clarity.

Closes gh-23086

spring-tx/src/main/java/org/springframework/transaction/reactive/AbstractReactiveTransactionManager.java

@@ -101,7 +101,7 @@ public abstract class AbstractReactiveTransactionManager implements ReactiveTran
 		// Use defaults if no transaction definition given.
 		TransactionDefinition def = (definition != null ? definition : TransactionDefinition.withDefaults());
 
-		return TransactionSynchronizationManager.currentTransaction()
+		return TransactionSynchronizationManager.forCurrentTransaction()
 				.flatMap(synchronizationManager -> {
 
 			Object transaction = doGetTransaction(synchronizationManager);
@@ -403,7 +403,7 @@ public abstract class AbstractReactiveTransactionManager implements ReactiveTran
 					"Transaction is already completed - do not call commit or rollback more than once per transaction"));
 		}
 
-		return TransactionSynchronizationManager.currentTransaction().flatMap(synchronizationManager -> {
+		return TransactionSynchronizationManager.forCurrentTransaction().flatMap(synchronizationManager -> {
 			GenericReactiveTransaction reactiveTx = (GenericReactiveTransaction) transaction;
 			if (reactiveTx.isRollbackOnly()) {
 				if (reactiveTx.isDebug()) {
@@ -483,7 +483,7 @@ public abstract class AbstractReactiveTransactionManager implements ReactiveTran
 			return Mono.error(new IllegalTransactionStateException(
 					"Transaction is already completed - do not call commit or rollback more than once per transaction"));
 		}
-		return TransactionSynchronizationManager.currentTransaction().flatMap(synchronizationManager -> {
+		return TransactionSynchronizationManager.forCurrentTransaction().flatMap(synchronizationManager -> {
 			GenericReactiveTransaction reactiveTx = (GenericReactiveTransaction) transaction;
 			return processRollback(synchronizationManager, reactiveTx);
 		});

spring-tx/src/main/java/org/springframework/transaction/reactive/TransactionSynchronizationManager.java

@@ -82,13 +82,13 @@ public class TransactionSynchronizationManager {
 
 
 	/**
-	 * Return the TransactionSynchronizationManager of the current transaction.
+	 * Get the {@link TransactionSynchronizationManager} that is associated with
-	 * Mainly intended for code that wants to bind resources or synchronizations.
+	 * the current transaction context.
-	 * rollback-only but not throw an application exception.
+	 * <p>Mainly intended for code that wants to bind resources or synchronizations.
-	 * @throws NoTransactionException if the transaction info cannot be found,
+	 * @throws NoTransactionException if the transaction info cannot be found &mdash;
-	 * because the method was invoked outside a managed transaction.
+	 * for example, because the method was invoked outside a managed transaction
 	 */
-	public static Mono<TransactionSynchronizationManager> currentTransaction() {
+	public static Mono<TransactionSynchronizationManager> forCurrentTransaction() {
 		return TransactionContextManager.currentContext().map(TransactionSynchronizationManager::new);
 	}