Examples of org.apache.derby.iapi.store.raw.xact.RawTransaction

Package org.apache.derby.iapi.store.raw.xact

Examples of org.apache.derby.iapi.store.raw.xact.RawTransaction

org.apache.derby.iapi.store.raw.xact.RawTransaction
RawTransaction is the form of Transaction used within the raw store. This allows the break down of RawStore functionality into (at least) three modules (Transactions, Data, Log) without exposing internal information on the external interface.
The transaction will notify any Observer's just before the transaction is committed, aborted or a rollback to savepoint occurs. The argument passed to the update() method of the Observer's will be one of
- RawTransaction.COMMIT - transaction is committing
- RawTransaction.ABORT - transaction is aborting
- RawTransaction.SAVEPOINTROLLBACK - transaction is being rolled back to a savepoint
The observer's must perform a value equality check (equals()) on the update arg to see why it is being notified. @see java.util.Observer

        {
      throw StandardException.newException(
                    SQLState.DATA_CONTAINER_READ_ONLY);
        }


    RawTransaction t = owner.getTransaction();


    owner.getActionSet().actionInvalidatePage(t, this);
  }

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        {
      throw StandardException.newException(
                    SQLState.DATA_CONTAINER_READ_ONLY);
        }


    RawTransaction t = owner.getTransaction();


    owner.getActionSet().actionInitPage(
      t, this, initFlag, getTypeFormatId(), pageOffset);
  }

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        {
      throw StandardException.newException(
                    SQLState.DATA_SLOT_NOT_ON_PAGE);
        }


    RawTransaction t = owner.getTransaction();


    // get num_rows row locks, need to predict what those recordIds will be


    int[] recordIds = new int[num_rows];

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        // TODO (mikem) - should a global scratch variable be used?


        // this is an overflow page purge, no need to lock the head row (it
        // has already been locked, hopefully).  No need to check for long rows
        // (they have already been deleted, hopefully).
        RawTransaction  t           = owner.getTransaction();
        int[]           recordId    = new int[1];


        recordId[0]                 = getHeaderAtSlot(slot).getId();


        owner.getActionSet().actionPurge(t, this, slot, 1, recordId, needDataLogged);

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                // that is being updated.
                Page firstPageOnColumnChain = getOverflowPage(overflowPage);
                PageTimeStamp ts = firstPageOnColumnChain.currentTimeStamp();
                firstPageOnColumnChain.unlatch();


                RawTransaction rxact = (RawTransaction)owner.getTransaction();


                ReclaimSpace work = 
                    new ReclaimSpace(ReclaimSpace.COLUMN_CHAIN,
                                headRowHandle,
                                fieldId, // long column about to be orphaned by update 
                                overflowPage, // page where the long column starts
                                overflowId, // record Id of the beginning of the long column
                                ts,
                                rxact.getDataFactory(), true);


                rxact.addPostCommitWork(work);


                rawDataIn.setPosition(saveOffset); // Just to be safe, reset data stream
            }

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        // Back to the head page.  Get rid of all reserved space in the entire
        // row post commit.
        if (rowHasReservedSpace)
        {
            RawTransaction rxact = (RawTransaction)owner.getTransaction();


            ReclaimSpace work = 
                new ReclaimSpace(ReclaimSpace.ROW_RESERVE,
                                 headRowHandle, 
                                 rxact.getDataFactory(), true);
            rxact.addPostCommitWork(work);
        }
    }

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        // TODO (mikem) - should a global scratch variable be used?


    // this is an overflow page purge, no need to lock the head row (it
    // has already been locked, hopefully).  No need to check for long rows
    // (they have already been deleted, hopefully).
    RawTransaction  t           = owner.getTransaction();
    int[]           recordId    = new int[1];


    recordId[0]                 = getHeaderAtSlot(slot).getId();


    owner.getActionSet().actionPurge(t, this, slot, 1, recordId, needDataLogged);

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        // that is being updated.
        Page firstPageOnColumnChain = getOverflowPage(overflowPage);
        PageTimeStamp ts = firstPageOnColumnChain.currentTimeStamp();
        firstPageOnColumnChain.unlatch();


        RawTransaction rxact = (RawTransaction)owner.getTransaction();


        ReclaimSpace work = 
          new ReclaimSpace(ReclaimSpace.COLUMN_CHAIN,
                headRowHandle,
                fieldId, // long column about to be orphaned by update 
                overflowPage, // page where the long column starts
                overflowId, // record Id of the beginning of the long column
                ts,
                rxact.getDataFactory(), true);


        rxact.addPostCommitWork(work);


        rawDataIn.setPosition(saveOffset); // Just to be safe, reset data stream
      }

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    // Back to the head page.  Get rid of all reserved space in the entire
    // row post commit.
    if (rowHasReservedSpace)
    {
      RawTransaction rxact = (RawTransaction)owner.getTransaction();


      ReclaimSpace work = 
        new ReclaimSpace(ReclaimSpace.ROW_RESERVE,
                 headRowHandle, 
                 rxact.getDataFactory(), true);
      rxact.addPostCommitWork(work);
    }
  }

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  }


  protected void prepareForBulkLoad(BaseContainerHandle handle, int numPage)
  {
    clearPreallocThreshold();
    RawTransaction tran = handle.getTransaction();


    // find the last allocation page - do not invalidate the alloc cache,
    // we don't want to prevent other people from reading or writing
    // pages. 
    AllocPage allocPage = findLastAllocPage(handle, tran);

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