Examples of org.apache.derby.iapi.store.raw.Loggable

org.apache.derby.iapi.store.raw.Loggable
A Loggable is a record of a change of state or an event that happened in the RawStore in the context of a transaction. All changes in the RawStore must be logged. This is the root class for all log operations. @see Transaction#logAndDo

    StreamLogScan scan = (StreamLogScan)
      openForwardsScan(checkpointInstant, (LogInstant)null);


    // estimated size of a checkpoint log record, which contains 3 longs
    // and assorted other log record overhead
    Loggable lop = logger.readLogRecord(scan, 100);
                
    scan.close();


    if (lop instanceof CheckpointOperation)
      return (CheckpointOperation)lop;

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  */
  public void actionAllocatePage(RawTransaction t, BasePage allocPage, 
                   long pageNumber, int doStatus, int undoStatus)
     throws StandardException
  {
    Loggable lop = new AllocPageOperation((AllocPage)allocPage, pageNumber, doStatus, undoStatus);


    // mark the page as pre-dirtied so that if a checkpoint happens after
    // the log record is sent to the log stream, the cache cleaning will
    // wait for this change.
    allocPage.preDirty();

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  */
  public void actionChainAllocPage(RawTransaction t, BasePage allocPage, 
                long pageNumber, long pageOffset)
     throws StandardException
  {
    Loggable lop = new ChainAllocPageOperation((AllocPage)allocPage, pageNumber, pageOffset);


    // mark the page as pre-dirtied so that if a checkpoint happens after
    // the log record is sent to the log stream, the cache cleaning will
    // wait for this change.
    allocPage.preDirty();

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    BasePage        allocPage, 
    int             new_highest_page, 
    int             num_pages_truncated)
        throws StandardException
    {
    Loggable lop = 
            new CompressSpacePageOperation(
                (AllocPage)allocPage, new_highest_page, num_pages_truncated);
        allocPage.preDirty();


        t.logAndDo(lop);

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    StreamLogScan scan = (StreamLogScan)
      openForwardsScan(checkpointInstant, (LogInstant)null);


    // estimated size of a checkpoint log record, which contains 3 longs
    // and assorted other log record overhead
    Loggable lop = logger.readLogRecord(scan, 100);
                
    scan.close();


    if (lop instanceof CheckpointOperation)
      return (CheckpointOperation)lop;

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Related Classes of org.apache.derby.iapi.store.raw.Loggable

org.apache.derby.impl.store.raw.data.LoggableAllocActions

org.apache.derby.impl.store.raw.log.FileLogger

org.apache.derby.impl.store.raw.log.LogToFile

org.apache.derby.impl.store.raw.log.Scan

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