Examples of com.sleepycat.je.log.FileManager.makeInvisible()

com.sleepycat.je.log.FileManager.makeInvisible()

Mark the specified log entries as invisible and obsolete. The entries are written here, but are fsync'ed later. If there is any problem or exception during the setting, the method will throw an EnvironmentFailureException. These changes are made directly to the file, but recently logged log entries may also be resident in the log buffers. The caller must take care to call LogManager.flush() before this method, to ensure that all entries are on disk. In addition, we must ensure that after this step, the affected log entries will only be read via a FileReader, and will not be faulted in by the LogManager. Entries may be present in the log and in the log buffers, but only the on disk version is modified by this method. The LogManager can read directly from the log buffers and may read the incorrect, non-invisible version of the log entry, rather than the invisible version from the file. This should not be an issue, because invisible log entries should be detached from the in-memory tree before they are made invisible. @param fileNum target file. @param lsns The list of LSNs to make invisible, must be sorted inascending order.

            if (DbLsn.getFileNumber(lsn) != currentFileNum) {
          /* 
           * We've moved on to a new file. Make the previous set of
           * lsns invisible.
           */
          fileManager.makeInvisible(currentFileNum, perFileLsns);


                currentFileNum = DbLsn.getFileNumber(lsn);
                filesToFsync.add(currentFileNum);


                /* make a new set to house the lsns for the next file. */

            }
            perFileLsns.add(lsn);
        }


        /* Take care of the last set. */
        fileManager.makeInvisible(currentFileNum, perFileLsns);
    }


    /* 
     * Flip the invisible bit for the rollback set of lsns, in lsn order.
     * Fsync the set of files represented in this collection of lsns. Used by

            if (DbLsn.getFileNumber(lsn) != currentFileNum) {
          /* 
           * We've moved on to a new file. Make the previous set of
           * lsns invisible.
           */
          fileManager.makeInvisible(currentFileNum, perFileLsns);


                currentFileNum = DbLsn.getFileNumber(lsn);
                filesToFsync.add(currentFileNum);


                /* make a new set to house the lsns for the next file. */

            perFileLsns.add(lsn);
        }


        /* Take care of the last set. */
        if (perFileLsns != null) {
            fileManager.makeInvisible(currentFileNum, perFileLsns);
        }
    }


    /* 
     * Flip the invisible bit for the rollback set of lsns, in lsn order.

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