Package org.projectnessie.versioned.persist.tx

Interface TxDatabaseAdapter.LoopOp

Enclosing class:

TxDatabaseAdapter

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface TxDatabaseAdapter.LoopOp

Method Summary

Modifier and Type	Method	Description
org.projectnessie.versioned.persist.tx.TxDatabaseAdapter.OpResult	apply(ConnectionWrapper conn, org.projectnessie.versioned.Hash targetRefHead)	Applies an operation within a CAS-loop.

Method Detail

apply

org.projectnessie.versioned.persist.tx.TxDatabaseAdapter.OpResult apply(ConnectionWrapper conn,
                                                                        org.projectnessie.versioned.Hash targetRefHead)
                                                                 throws org.projectnessie.versioned.VersionStoreException,
                                                                        java.sql.SQLException

Applies an operation within a CAS-loop. The implementation gets the current global-state and must return an updated global-state with a different global-id.

Parameters:

conn - current JDBC connection

targetRefHead - current named-reference's HEAD

Returns:

if non-* null, the JDBC transaction is committed and the hash returned from TxDatabaseAdapter.opLoop(String, NamedRef, boolean, LoopOp, Supplier, Supplier). If null, the opLoop() tries again.

Throws:

RetryTransactionException - (see TxDatabaseAdapter.isRetryTransaction(SQLException)), the current JDBC transaction is rolled back and TxDatabaseAdapter.opLoop(String, NamedRef, boolean, LoopOp, Supplier, Supplier) tries again

java.sql.SQLException - if this matches TxDatabaseAdapter.isIntegrityConstraintViolation(Throwable), the exception is re-thrown as a ReferenceConflictException

org.projectnessie.versioned.VersionStoreException - any other version-store exception

See Also:

TxDatabaseAdapter.opLoop(String, NamedRef, boolean, LoopOp, Supplier, Supplier)