/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2006
* Sleepycat Software. All rights reserved.
*
* $Id: VerifyUtils.java,v 1.1 2006/01/10 01:18:31 linda Exp $
*/
package com.sleepycat.je.cleaner;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import com.sleepycat.je.Database;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.DbInternal;
import com.sleepycat.je.dbi.DatabaseImpl;
import com.sleepycat.je.dbi.SortedLSNTreeWalker;
import com.sleepycat.je.dbi.SortedLSNTreeWalker.TreeNodeProcessor;
import com.sleepycat.je.log.LogEntryType;
import com.sleepycat.je.utilint.DbLsn;
/**
* Verify cleaner data structures
*/
public class VerifyUtils {
private static final boolean DEBUG = false;
/**
* Compare the lsns referenced by a given Database to the lsns held
* in the utilization profile. Assumes that the database and
* environment is quiescent, and that there is no current cleaner
* activity.
*/
public static void checkLsns(Database db)
throws DatabaseException {
DatabaseImpl dbImpl = DbInternal.dbGetDatabaseImpl(db);
/* Get all the lsns in the database. */
GatherLSNs gatherLsns = new GatherLSNs();
long rootLsn = dbImpl.getTree().getRootLsn();
SortedLSNTreeWalker walker =
new SortedLSNTreeWalker(dbImpl,
false, // don't remove from INList
false, // don't set db state
rootLsn,
gatherLsns);
walker.walk();
Set lsnsInTree = gatherLsns.getLsns();
lsnsInTree.add(new Long(rootLsn));
/* Get all the files used by this database. */
Iterator iter = lsnsInTree.iterator();
Set fileNums = new HashSet();
while (iter.hasNext()) {
long lsn = ((Long) iter.next()).longValue();
fileNums.add(new Long(DbLsn.getFileNumber(lsn)));
}
/* Gather up the obsolete lsns in these file summary lns */
iter = fileNums.iterator();
Set obsoleteLsns = new HashSet();
UtilizationProfile profile =
dbImpl.getDbEnvironment().getUtilizationProfile();
while (iter.hasNext()) {
Long fileNum = (Long) iter.next();
PackedOffsets obsoleteOffsets = new PackedOffsets();
TrackedFileSummary tfs =
profile.getObsoleteDetail(fileNum,
obsoleteOffsets,
false /* logUpdate */);
PackedOffsets.Iterator obsoleteIter = obsoleteOffsets.iterator();
while (obsoleteIter.hasNext()) {
long offset = obsoleteIter.next();
Long oneLsn = new Long(DbLsn.makeLsn(fileNum.longValue(),
offset));
obsoleteLsns.add(oneLsn);
if (DEBUG) {
System.out.println("Adding 0x" +
Long.toHexString(oneLsn.longValue()));
}
}
}
/* Check than none the lsns in the tree is in the UP. */
boolean error = false;
iter = lsnsInTree.iterator();
while (iter.hasNext()) {
Long lsn = (Long) iter.next();
if (obsoleteLsns.contains(lsn)) {
System.err.println("Obsolete lsns contains valid lsn " +
DbLsn.getNoFormatString(lsn.longValue()));
error = true;
}
}
/*
* Check that none of the lsns in the file summary ln is in the
* tree.
*/
iter = obsoleteLsns.iterator();
while (iter.hasNext()) {
Long lsn = (Long) iter.next();
if (lsnsInTree.contains(lsn)) {
System.err.println("Tree contains obsolete lsn " +
DbLsn.getNoFormatString(lsn.longValue()));
error = true;
}
}
if (error) {
throw new DatabaseException("Lsn mismatch");
}
}
private static class GatherLSNs implements TreeNodeProcessor {
private Set lsns = new HashSet();
public void processLSN(long childLSN, LogEntryType childType) {
lsns.add(new Long(childLSN));
}
public Set getLsns() {
return lsns;
}
}
}