List of scanForwards() Examples

Examples of scanForwards()

com.sleepycat.je.rep.stream.FeederReader.scanForwards()

Forward scanning for feeding the replica: get the log record for this VLSN. If the log record hasn't been created yet, wait for a period specified by "waitTime". Where possible, the FeederReader fetches the log record from the cache within the VLSNIndex. (See the VLSNIndex for a description of this two level cache). If the requested VLSN is not available from the cache, the reader fetches the item from the JE log -- either from the log buffers or from disk. The FeederReader is like a cursor on the log, and retains a position in the log. When there are log item cache hits, the FeederReader's position can fall behind, because it is being bypassed. It is possible for log cleaning to take place between the point of the FeederReader's stale position and the end of the log. If so, the FeederReader must not attempt to scan from its current position, because it might run afoul of gap created by the cleaned and delete log files. When there have been log item cache hits, the FeederReader must jump its position forward using the vlsnIndex mappings to safely skip over any cleaned gaps in the log.

            OutputWireRecord record = null;
            System.out.println("<DbPrintLog>");
            long lastLsn = 0;
            do  {
                if (forward) {
                    record = feederReader.scanForwards(scanVLSN, 0);
                    scanVLSN = scanVLSN.getNext();
                    lastLsn = feederReader.getLastLsn();
                } else {
                    record = backwardsReader.scanBackwards(scanVLSN);
                    scanVLSN = scanVLSN.getPrev();

            OutputWireRecord record = null;
            System.out.println("<DbPrintLog>");
            long lastLsn = 0;
            do  {
                if (forward) {
                    record = feederReader.scanForwards(scanVLSN, 0);
                    scanVLSN = scanVLSN.getNext();
                    lastLsn = feederReader.getLastLsn();
                } else {
                    record = backwardsReader.scanBackwards(scanVLSN);
                    scanVLSN = scanVLSN.getPrev();

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Examples of scanForwards()

Examples of com.sleepycat.je.rep.stream.FeederReader.scanForwards()

Examples of com.sleepycat.je.rep.stream.FeederReader.scanForwards()