org.treetank.io.berkeley

Class BerkeleyReader

java.lang.Object

org.treetank.io.berkeley.BerkeleyReader

All Implemented Interfaces:

IBackendReader

public final class BerkeleyReader
extends Object
implements IBackendReader

This class represents an reading instance of the Treetank-Application implementing the IBackendReader-interface.

Author:

Sebastian Graf, University of Konstanz

Field Summary

Fields

Modifier and Type	Field and Description
protected com.sleepycat.bind.tuple.TupleBinding<IBucket>	mBucketBinding Binding for IBucket.
protected com.google.common.cache.Cache<Long,IBucket>	mCache Cache for reading data.
protected com.sleepycat.je.Environment	mEnv

Constructor Summary

Constructors

Constructor and Description
BerkeleyReader(com.sleepycat.je.Environment pEnv, com.sleepycat.je.Database pDatabase, com.sleepycat.bind.tuple.TupleBinding<IBucket> pBucketBinding) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closing the storage.
IBucket	read(long pKey) Getting a reference for the given pointer.
UberBucket	readUber() Reading the UberBucket

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mBucketBinding

protected final com.sleepycat.bind.tuple.TupleBinding<IBucket> mBucketBinding

Binding for IBucket.

mCache

protected final com.google.common.cache.Cache<Long,IBucket> mCache

Cache for reading data.

mEnv

protected final com.sleepycat.je.Environment mEnv

Constructor Detail

BerkeleyReader

public BerkeleyReader(com.sleepycat.je.Environment pEnv,
              com.sleepycat.je.Database pDatabase,
              com.sleepycat.bind.tuple.TupleBinding<IBucket> pBucketBinding)

Constructor.

Parameters:

pEnv -

pDatabase - Storage reference to be connected to

pBucketBinding - TupleBinding for de/-serializing buckets

Method Detail

read

public IBucket read(long pKey)
             throws TTIOException

Getting a reference for the given pointer.

Specified by:

read in interface IBackendReader

Parameters:

pKey - the reference for the bucket to be determined

Returns:

a IBucket as the base for a bucket

Throws:

TTIOException

close

public void close()
           throws TTIOException

Closing the storage.

Specified by:

close in interface IBackendReader

Throws:

TTIOException - if something bad happens while access

readUber

public UberBucket readUber()
                    throws TTIOException

Reading the UberBucket

Specified by:

readUber in interface IBackendReader

Returns:

the most recent UberBucket

Throws:

TTIOException