/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002, 2011 Oracle and/or its affiliates. All rights reserved.
*
*/
package com.sleepycat.je.cleaner;
import com.sleepycat.bind.tuple.TupleInput;
import com.sleepycat.bind.tuple.TupleOutput;
import com.sleepycat.je.dbi.DatabaseImpl;
import com.sleepycat.je.dbi.MemoryBudget;
import com.sleepycat.je.log.LogEntryType;
import com.sleepycat.je.utilint.DbLsn;
/**
* A sequence of obsolete info.
*
* To save memory, a TupleOutput is used to contain a sequence of {LSN-file,
* LSN-offset, isLN, size} tuples. Packed integers are used and memory is saved
* by not using an Object for each tuple, as would be needed in a Java
* collection.
*
* An OffsetList was not used because it does not use packed integers.
* PackedOffsets was not used because it depends on offsets being sorted in
* ascending order.
*/
public class PackedObsoleteInfo extends TupleOutput {
public PackedObsoleteInfo() {
}
public int getMemorySize() {
return MemoryBudget.tupleOutputSize(this);
}
public void copyObsoleteInfo(final PackedObsoleteInfo other) {
writeFast(other.getBufferBytes(),
other.getBufferOffset(),
other.getBufferLength());
}
public void addObsoleteInfo(final long obsoleteLsn,
final boolean isObsoleteLN,
final int obsoleteSize) {
writePackedLong(DbLsn.getFileNumber(obsoleteLsn));
writePackedLong(DbLsn.getFileOffset(obsoleteLsn));
writeBoolean(isObsoleteLN);
writePackedInt(obsoleteSize);
}
public void countObsoleteInfo(final UtilizationTracker tracker,
final DatabaseImpl nodeDb) {
final TupleInput in = new TupleInput(this);
while (in.available() > 0) {
final long fileNumber = in.readPackedLong();
long fileOffset = in.readPackedLong();
final boolean isObsoleteLN = in.readBoolean();
final int obsoleteSize = in.readPackedInt();
tracker.countObsoleteNode
(DbLsn.makeLsn(fileNumber, fileOffset),
isObsoleteLN ?
LogEntryType.LOG_INS_LN /* Any LN type will do */ :
LogEntryType.LOG_IN,
obsoleteSize, nodeDb);
}
}
}