org.treetank.bucket

Class UberBucket

java.lang.Object

org.treetank.bucket.UberBucket

All Implemented Interfaces:

IBucket, IReferenceBucket

public final class UberBucket
extends Object
implements IReferenceBucket

UberBucket

Uber bucket holds a reference to the static revision root bucket tree.

Author:

Sebastian Graf, University of Konstanz, Marc Kramis, University of Konstanz

Field Summary

Fields inherited from interface org.treetank.bucket.interfaces.IReferenceBucket

GUARANTEED_INDIRECT_OFFSET

Constructor Summary

Constructors

Constructor and Description
UberBucket(long pBucketKey, long pRevisionCount, long pBucketCounter) New uber bucket

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
long	getBucketCounter() Getter for mBucketCounter.
long	getBucketKey() Getting the key of a bucket for dereferencing over any pointers as well, the access in the log and for retrieving buckets from the persistent storage.
byte[][]	getReferenceHashs() Getting the HashValues mapped to the references guarding the integrity of the referenced buckets.
long[]	getReferenceKeys() Getting the keys of the referenced buckets.
long	getRevisionNumber() Get revision key of current in-memory state.
int	hashCode()
long	incrementBucketCounter() Incrementing the counter.
com.google.common.hash.HashCode	secureHash() Getting a secure hash for a bucket.
void	serialize(DataOutput pOutput) Serializing to given dataput
void	setReferenceHash(int pIndex, byte[] pHash) Setting the hash of a referenced bucket to this bucket.
void	setReferenceKey(int pIndex, long pKey) Setting one key of a bucket to be referenced from this bucket.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

UberBucket

public UberBucket(long pBucketKey,
          long pRevisionCount,
          long pBucketCounter)

New uber bucket

Parameters:

pBucketKey - key of this bucket

pRevisionCount - count of all revisions in this storage

pBucketCounter - Counter for all buckets

Method Detail

getRevisionNumber

public long getRevisionNumber()

Get revision key of current in-memory state.

Returns:

Revision key.

serialize

public void serialize(DataOutput pOutput)
               throws TTIOException

Serializing to given dataput

Specified by:

serialize in interface IBucket

Parameters:

pOutput - to serialize to

Throws:

TTIOException

getBucketKey

public long getBucketKey()

Getting the key of a bucket for dereferencing over any pointers as well, the access in the log and for retrieving buckets from the persistent storage.

Specified by:

getBucketKey in interface IBucket

Returns:

the key of the bucket

incrementBucketCounter

public long incrementBucketCounter()

Incrementing the counter.

Returns:

the incremented counter

getBucketCounter

public long getBucketCounter()

Getter for mBucketCounter.

Returns:

the mBucketCounter

getReferenceKeys

public long[] getReferenceKeys()

Getting the keys of the referenced buckets.

Specified by:

getReferenceKeys in interface IReferenceBucket

Returns:

the keys for the referenced buckets.

setReferenceKey

public void setReferenceKey(int pIndex,
                   long pKey)

Setting one key of a bucket to be referenced from this bucket.

Specified by:

setReferenceKey in interface IReferenceBucket

Parameters:

pIndex - offset of the key to be referenced

pKey - the key of the bucket to be referenced

toString

public String toString()

Overrides:

toString in class Object

getReferenceHashs

public byte[][] getReferenceHashs()

Getting the HashValues mapped to the references guarding the integrity of the referenced buckets.

Specified by:

getReferenceHashs in interface IReferenceBucket

Returns:

an array of checksums from the referenced buckets

setReferenceHash

public void setReferenceHash(int pIndex,
                    byte[] pHash)

Setting the hash of a referenced bucket to this bucket.

Specified by:

setReferenceHash in interface IReferenceBucket

Parameters:

pIndex - where the hash should be applied to

pHash - to be stored in

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

secureHash

public com.google.common.hash.HashCode secureHash()

Getting a secure hash for a bucket.

Specified by:

secureHash in interface IBucket

Returns:

the bytes representing a secure hash