org.treetank.io.berkeley

Class BerkeleyWriter

java.lang.Object

org.treetank.io.berkeley.BerkeleyWriter

All Implemented Interfaces:

IBackendReader, IBackendWriter

public final class BerkeleyWriter
extends Object
implements IBackendWriter

This class represents an reading instance of the Treetank-Application implementing the IBackendWriter-interface. It inherits and overrides some reader methods because of the transaction layer.

Author:

Sebastian Graf, University of Konstanz

Constructor Summary

Constructors

Constructor and Description
BerkeleyWriter(com.sleepycat.je.Environment pEnv, com.sleepycat.je.Database pDatabase, com.sleepycat.bind.tuple.TupleBinding<IBucket> pBucketBinding) Simple constructor starting with an Environment and a Storage.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closing the write access.
IBucket	read(long pKey) Getting a reference for the given pointer.
UberBucket	readUber() Reading the UberBucket
void	write(IBucket bucket) Writing a bucket related to the reference.
void	writeUberBucket(UberBucket pBucket) Writing the UberBucket including the pointer to the bucket.

Methods inherited from class java.lang.Object

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

Constructor Detail

BerkeleyWriter

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

Simple constructor starting with an Environment and a Storage.

Parameters:

pEnv - env to create new reader

pDatabase - Storage reference where the data should be written to

pBucketBinding - TupleBinding for de/-serializing buckets

Throws:

TTIOException - if something odd happens

Method Detail

write

public void write(IBucket bucket)
           throws TTIOException

Writing a bucket related to the reference.

Specified by:

write in interface IBackendWriter

Parameters:

bucket - bucket to be written

Throws:

TTIOException

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 write access.

Specified by:

close in interface IBackendReader

Specified by:

close in interface IBackendWriter

Throws:

TTIOException - if closing fails

readUber

public UberBucket readUber()
                    throws TTIOException

Reading the UberBucket

Specified by:

readUber in interface IBackendReader

Returns:

the most recent UberBucket

Throws:

TTIOException

writeUberBucket

public void writeUberBucket(UberBucket pBucket)
                     throws TTException

Writing the UberBucket including the pointer to the bucket.

Specified by:

writeUberBucket in interface IBackendWriter

Parameters:

pBucket - the UberBucket to be written.

Throws:

TTException