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# Transaction Synchronization
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Spring's transaction synchronization provides utilities for coordinating resources and callbacks within transaction boundaries.
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## TransactionSynchronizationManager
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```java { .api }
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public abstract class TransactionSynchronizationManager {
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    public static boolean isSynchronizationActive();
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    public static void initSynchronization();
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    public static void registerSynchronization(TransactionSynchronization synchronization);
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    public static List<TransactionSynchronization> getSynchronizations();
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    public static void clearSynchronization();
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    public static boolean isCurrentTransactionReadOnly();
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    public static void setCurrentTransactionReadOnly(boolean readOnly);
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    public static String getCurrentTransactionName();
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    public static void setCurrentTransactionName(String name);
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    public static boolean isActualTransactionActive();
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    public static void setActualTransactionActive(boolean active);
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}
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```
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## TransactionSynchronization Interface
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```java { .api }
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public interface TransactionSynchronization {
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    int STATUS_COMMITTED = 0;
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    int STATUS_ROLLED_BACK = 1;
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    int STATUS_UNKNOWN = 2;
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    default void suspend() {}
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    default void resume() {}
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    default void flush() {}
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    default void beforeCommit(boolean readOnly) {}
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    default void beforeCompletion() {}
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    default void afterCommit() {}
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    default void afterCompletion(int status) {}
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}
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```
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## Usage Examples
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```java
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@Service
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public class SynchronizedService {
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    public void performWithSynchronization() {
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        TransactionSynchronizationManager.registerSynchronization(
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            new TransactionSynchronization() {
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                @Override
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                public void afterCommit() {
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                    // Cleanup after successful commit
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                    cleanupResources();
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                }
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                @Override
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                public void afterCompletion(int status) {
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                    if (status == STATUS_ROLLED_BACK) {
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                        // Handle rollback
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                        handleRollback();
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                    }
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                }
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            });
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    }
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}
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```