/**
* 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;
}
// changed to public
public boolean isTargetEntry(byte entryTypeNum, byte entryTypeVersion) throws DatabaseException {
lastEntryWasDelete = false;
lastEntryWasDupDelete = false;
targetLogEntry = null;
dbIdTrackingEntry = null;
txnIdTrackingEntry = null;
nodeTrackingEntry = null;
inTrackingEntry = null;
fsTrackingEntry = null;
isProvisional = LogEntryType.isProvisional(entryTypeVersion);
/* Get the log entry type instance we need to read the entry. */
fromLogType = LogEntryType.findType(entryTypeNum, entryTypeVersion);
LogEntry possibleTarget = (LogEntry) targetEntryMap.get(fromLogType);
/*
* If the entry is provisional, we won't be reading it in its entirety;
* otherwise, we try to establish targetLogEntry.
*/
if (!isProvisional) {
targetLogEntry = possibleTarget;
}
/* Was the log entry an IN deletion? */
if (LogEntryType.LOG_IN_DELETE_INFO.equals(fromLogType)) {
lastEntryWasDelete = true;
}
if (LogEntryType.LOG_IN_DUPDELETE_INFO.equals(fromLogType)) {
lastEntryWasDupDelete = true;
}
if (trackIds) {
/*
* Check if it's a db or txn id tracking entry. Note that these
* entries do not overlap with targetLogEntry.
*/
if (!isProvisional) {
dbIdTrackingEntry = (LNLogEntry) dbIdTrackingMap.get(fromLogType);
txnIdTrackingEntry = (LNLogEntry) txnIdTrackingMap.get(fromLogType);
}
/*
* Determine nodeTrackingEntry, inTrackingEntry, fsTrackingEntry.
* Note that these entries do overlap with targetLogEntry.
*/
if (fromLogType.isNodeType()) {
if (possibleTarget != null) {
nodeTrackingEntry = (NodeLogEntry) possibleTarget;
} else if (dbIdTrackingEntry != null) {
nodeTrackingEntry = dbIdTrackingEntry;
} else if (txnIdTrackingEntry != null) {
nodeTrackingEntry = txnIdTrackingEntry;
} else {
nodeTrackingEntry = (NodeLogEntry) otherNodeTrackingMap.get(fromLogType);
if (nodeTrackingEntry == null) {
nodeTrackingEntry = (NodeLogEntry) fromLogType.getNewLogEntry();
otherNodeTrackingMap.put(fromLogType, nodeTrackingEntry);
}
}
if (nodeTrackingEntry instanceof INLogEntry) {
inTrackingEntry = (INLogEntry) nodeTrackingEntry;
}
if (LogEntryType.LOG_FILESUMMARYLN.equals(fromLogType)) {
fsTrackingEntry = (LNLogEntry) nodeTrackingEntry;
}
}
/* Count all entries as new. */
tracker.countNewLogEntry(
getLastLsn(), fromLogType, LogManager.HEADER_BYTES + currentEntrySize);
/*
* Return true if this entry should be passed on to processEntry. If
* we're tracking ids, return if this is a targeted entry or if it's
* any kind of tracked entry or node.
*/
return (targetLogEntry != null)
|| (dbIdTrackingEntry != null)
|| (txnIdTrackingEntry != null)
|| (nodeTrackingEntry != null);
} else {
/*
* Return true if this entry should be passed on to processEntry. If
* we're not tracking ids, only return true if it's a targeted
* entry.
*/
return (targetLogEntry != null);
}
}
