/** This reader collects stats about the log entry. */
@Override
protected boolean processEntry(ByteBuffer entryBuffer) {
byte currentType = currentEntryHeader.getType();
int itemSize = currentEntryHeader.getItemSize();
int headerSize = currentEntryHeader.getSize();
/*
* Record various stats based on the entry header, then move the buffer
* forward to skip ahead.
*/
LogEntryType lastEntryType = LogEntryType.findType(currentType);
int nextEntryPosition = entryBuffer.position() + itemSize;
/*
* Get the info object for it, if this is the first time it's seen,
* create an info object and insert it.
*/
EntryInfo info = entryInfoMap.get(lastEntryType);
if (info == null) {
info = new EntryInfo();
entryInfoMap.put(lastEntryType, info);
}
/* Update counts. */
info.count++;
totalCount++;
if (currentEntryHeader.getProvisional() == Provisional.YES) {
info.provisionalCount++;
}
int size = itemSize + headerSize;
info.totalBytes += size;
info.headerBytes += headerSize;
totalLogBytes += size;
if ((info.minBytes == 0) || (info.minBytes > size)) {
info.minBytes = size;
}
if (info.maxBytes < size) {
info.maxBytes = size;
}
if (verbose) {
if (firstLsnRead == DbLsn.NULL_LSN) {
firstLsnRead = getLastLsn();
}
if (currentType == LogEntryType.LOG_CKPT_END.getTypeNum()) {
/* Start counting a new interval. */
ckptCounter.endCkptLsn = getLastLsn();
ckptCounter = new CheckpointCounter();
ckptList.add(ckptCounter);
} else {
ckptCounter.increment(this, currentType);
}
}
if (lastEntryType.isUserLNType()) {
/* Read the entry into the ByteBuffer. */
LNLogEntry<?> entry = (LNLogEntry<?>) lastEntryType.getSharedLogEntry();
entry.readEntry(envImpl, currentEntryHeader, entryBuffer);
/*
* The getUnconvertedXxx methods are used because we don't have a
* DatabaseImpl for calling LNLogEntry.postFetchInit, and we can
* tolerate statistics that use the old duplicates format.
*/
int keyLen = entry.getUnconvertedKeyLength();
realTotalKeyBytes += keyLen;
if (!entry.isDeleted()) {
int dataLen = entry.getUnconvertedDataLength();
realTotalDataBytes += dataLen;
}
}
entryBuffer.position(nextEntryPosition);
return true;
}
/**
* This reader looks at all nodes for the max node id and database id. It only returns
* non-provisional INs and IN delete entries.
*/
protected boolean processEntry(ByteBuffer entryBuffer) throws DatabaseException {
boolean useEntry = false;
boolean entryLoaded = false;
/* If this is a targetted entry, read the entire log entry. */
if (targetLogEntry != null) {
targetLogEntry.readEntry(entryBuffer, currentEntrySize, currentEntryTypeVersion, true);
DatabaseId dbId = getDatabaseId();
boolean isMapDb = dbId.equals(DbTree.ID_DB_ID);
useEntry = (!mapDbOnly || isMapDb);
entryLoaded = true;
}
/* Do a partial load during tracking if necessary. */
if (trackIds) {
/*
* Do partial load of db and txn id tracking entries if necessary.
* Note that these entries do not overlap with targetLogEntry.
*
* XXX We're doing a full load for now, since LNLogEntry does not
* read the db and txn id in a partial load, only the node id.
*/
LNLogEntry lnEntry = null;
if (dbIdTrackingEntry != null) {
/* This entry has a db id */
lnEntry = dbIdTrackingEntry;
lnEntry.readEntry(
entryBuffer, currentEntrySize, currentEntryTypeVersion, true /* full load */);
entryLoaded = true;
MapLN mapLN = (MapLN) lnEntry.getMainItem();
int dbId = mapLN.getDatabase().getId().getId();
if (dbId > maxDbId) {
maxDbId = dbId;
}
}
if (txnIdTrackingEntry != null) {
/* This entry has a txn id */
if (lnEntry == null) {
lnEntry = txnIdTrackingEntry;
lnEntry.readEntry(
entryBuffer, currentEntrySize, currentEntryTypeVersion, true /* full load */);
entryLoaded = true;
}
long txnId = lnEntry.getTxnId().longValue();
if (txnId > maxTxnId) {
maxTxnId = txnId;
}
}
/*
* Perform utilization counting under trackIds to prevent
* double-counting.
*/
if (fsTrackingEntry != null) {
/* Must do full load to get key from file summary LN. */
if (!entryLoaded) {
nodeTrackingEntry.readEntry(
entryBuffer, currentEntrySize, currentEntryTypeVersion, true /* full load */);
entryLoaded = true;
}
/*
* When a FileSummaryLN is encountered, reset the tracked
* summary for that file to replay what happens when a
* FileSummaryLN log entry is written.
*/
byte[] keyBytes = fsTrackingEntry.getKey();
FileSummaryLN fsln = (FileSummaryLN) fsTrackingEntry.getMainItem();
long fileNum = fsln.getFileNumber(keyBytes);
TrackedFileSummary trackedLN = tracker.getTrackedFile(fileNum);
if (trackedLN != null) {
trackedLN.reset();
}
/* Save the LSN of the FileSummaryLN for use by undo/redo. */
fileSummaryLsns.put(new Long(fileNum), new Long(getLastLsn()));
/*
* SR 10395: Do not cache the file summary in the
* UtilizationProfile here, since it may be for a deleted log
* file.
*/
}
/*
* Do partial load of nodeTrackingEntry (and inTrackingEntry) if not
* already loaded. We only need the node id.
*/
if (nodeTrackingEntry != null) {
if (!entryLoaded) {
nodeTrackingEntry.readEntry(
entryBuffer, currentEntrySize, currentEntryTypeVersion, false /* partial load */);
entryLoaded = true;
}
/* Keep track of the largest node id seen. */
long nodeId = nodeTrackingEntry.getNodeId();
maxNodeId = (nodeId > maxNodeId) ? nodeId : maxNodeId;
}
if (inTrackingEntry != null) {
assert entryLoaded : "All nodes should have been loaded";
/*
* Count the obsolete LSN of the previous version, if available
* and if not already counted. Use inexact counting for two
* reasons: 1) we don't always have the full LSN because earlier
* log versions only had the file number, and 2) we can't
* guarantee obsoleteness for provisional INs.
*/
long oldLsn = inTrackingEntry.getObsoleteLsn();
if (oldLsn != DbLsn.NULL_LSN) {
long newLsn = getLastLsn();
if (!isObsoleteLsnAlreadyCounted(oldLsn, newLsn)) {
tracker.countObsoleteNodeInexact(oldLsn, fromLogType);
}
}
/*
* Count a provisional IN as obsolete if it follows
* partialCkptStart. It cannot have been already counted,
* because provisional INs are not normally counted as obsolete;
* they are only considered obsolete when they are part of a
* partial checkpoint.
*
* Depending on the exact point at which the checkpoint was
* aborted, this technique is not always accurate; therefore
* inexact counting must be used.
*/
if (isProvisional && partialCkptStart != DbLsn.NULL_LSN) {
oldLsn = getLastLsn();
if (DbLsn.compareTo(partialCkptStart, oldLsn) < 0) {
tracker.countObsoleteNodeInexact(oldLsn, fromLogType);
}
}
}
}
/* Return true if this entry should be processed */
return useEntry;
}
