org.egothor.util.hash

Class Table

java.lang.Object

org.egothor.util.hash.Table

All Implemented Interfaces:

URIRepositoryAppender

public final class Table
extends Object
implements URIRepositoryAppender

Author:

galambos

Constructor Summary

Constructors

Constructor and Description
Table(int bucket_size, String digestAlgorithm, String filename, int nodes_cache, int uris_cache, int buckets_size)

Method Summary

Modifier and Type	Method and Description
long	append(URI uri) Returns the new identifier related to the URI, -id iff the URI already exists under the id in the base.
long	buckets()
float	bucketsCacheEff()
float	cacheEff()
void	close()
int	dataSize() Length of a hash value.
long	nodes()
float	nodesCacheEff()
long	size() Returns number of URIs in the base, or -1 iff the value is unknown.
boolean	wasNew() Returns true if and only if the last successful push(byte[]) inserted a new item.

Methods inherited from class java.lang.Object

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

Constructor Detail

Table

public Table(int bucket_size,
             String digestAlgorithm,
             String filename,
             int nodes_cache,
             int uris_cache,
             int buckets_size)
      throws IOException,
             NoSuchAlgorithmException

Parameters:

bucket_size -

digestAlgorithm -

filename -

nodes_cache -

uris_cache -

buckets_size -

Throws:

IOException

NoSuchAlgorithmException

Method Detail

size

public long size()

Description copied from interface: URIRepositoryAppender

Returns number of URIs in the base, or -1 iff the value is unknown.

Specified by:

size in interface URIRepositoryAppender

buckets

public long buckets()

Returns:

nodes

public long nodes()

Returns:

nodesCacheEff

public float nodesCacheEff()

Returns:

bucketsCacheEff

public float bucketsCacheEff()

Returns:

cacheEff

public float cacheEff()

Returns:

wasNew

public boolean wasNew()

Returns true if and only if the last successful push(byte[]) inserted a new item.

dataSize

public int dataSize()

Length of a hash value.

Returns:

digester.getDigestLength

close

public void close()

Specified by:

close in interface URIRepositoryAppender

append

public long append(URI uri)

Description copied from interface: URIRepositoryAppender

Returns the new identifier related to the URI, -id iff the URI already exists under the id in the base.

Specified by:

append in interface URIRepositoryAppender