Package org.apache.jena.dboe.transaction.txn

Interface TransactionInfo

All Known Implementing Classes:
Transaction
public interface TransactionInfo
A view that provides information about a transaction
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    getDataVersion()
    Each transaction is allocated a serialization point by the transaction coordinator.
    ReadWrite
    getMode()
    What mode is this transaction? This may change from READ to WRITE in a transactions lifetime.
    TxnState
    getState()
    The transaction lifecycle state
    TxnId
    getTxnId()
    Get the transaction id for this transaction.
    TxnType
    getTxnType()
    What type is this transaction? This is the initial TxnType and does not change during a transaction's lifetime.
    boolean
    hasFinalised()
    Has the transaction gone through all lifecycle states?
    boolean
    hasFinished()
    Has the transaction finished (has commit/abort/end been called)?
    boolean
    hasStarted()
    Has the transaction started?
    default boolean
    isActiveTxn()
    Is this a view of a transaction that is active? Equivalent to getState() != INACTIVE
    default boolean
    isReadTxn()
    Is this currently a READ transaction? Promotion may change the mode.
    default boolean
    isWriteTxn()
    Is this a currently a WRITE transaction? Convenience operation equivalent to (getMode() == ReadWrite.WRITE)

  • Method Details

    • getState

      TxnState getState()
      The transaction lifecycle state

    • getDataVersion

      long getDataVersion()
      Each transaction is allocated a serialization point by the transaction coordinator. Normally, this is related to this number and it increases over time as the data changes. Two readers can have the same serialization point - they are working with the same view of the data.

    • hasStarted

      boolean hasStarted()
      Has the transaction started?

    • hasFinished

      boolean hasFinished()
      Has the transaction finished (has commit/abort/end been called)?

    • hasFinalised

      boolean hasFinalised()
      Has the transaction gone through all lifecycle states?

    • getTxnId

      TxnId getTxnId()
      Get the transaction id for this transaction. Unique within this OS process (JVM) at least .

    • getTxnType

      TxnType getTxnType()
      What type is this transaction? This is the initial TxnType and does not change during a transaction's lifetime.

    • getMode

      ReadWrite getMode()
      What mode is this transaction? This may change from READ to WRITE in a transactions lifetime.

    • isReadTxn

      default boolean isReadTxn()
      Is this currently a READ transaction? Promotion may change the mode. Convenience operation equivalent to (getMode() == ReadWrite.READ)

    • isWriteTxn

      default boolean isWriteTxn()
      Is this a currently a WRITE transaction? Convenience operation equivalent to (getMode() == ReadWrite.WRITE)

    • isActiveTxn

      default boolean isActiveTxn()
      Is this a view of a transaction that is active? Equivalent to getState() != INACTIVE