net.yacy.document.content.dao

Interface Dao

All Known Implementing Classes:

PhpBB3Dao

public interface Dao

Method Summary

Methods

Modifier and Type	Method and Description
void	close() close the connection to the database
java.util.Date	first() return the date of the first entry
DCEntry	get(int item) retrieve a single item from the database
java.util.Date	latest() return the date of the latest entry
java.util.concurrent.BlockingQueue<DCEntry>	query(java.util.Date from, int queueSize) retrieve a set of entries in the database; the result set contains all entries up to the most recent all retrieved objects are pushed to the blocking queue
java.util.concurrent.BlockingQueue<DCEntry>	query(int from, int until, int queueSize) retrieve a set of entries in the database; the object denoted with until is not contained in the result set all retrieved objects are pushed concurrently to a blocking queue
int	size() get the maximum number of possible DCEntry items in the database
int	writeSurrogates(java.util.concurrent.BlockingQueue<DCEntry> queue, java.io.File targetdir, java.lang.String versioninfo, int maxEntriesInFile)

Method Detail

size

int size()
         throws java.sql.SQLException

get the maximum number of possible DCEntry items in the database

Throws:

java.sql.SQLException

get

DCEntry get(int item)

retrieve a single item from the database

Parameters:

item -

Returns:

a single result entry in Dublin Core format

query

java.util.concurrent.BlockingQueue<DCEntry> query(int from,
                                                int until,
                                                int queueSize)

retrieve a set of entries in the database; the object denoted with until is not contained in the result set all retrieved objects are pushed concurrently to a blocking queue

Parameters:

from - the first id

until - the limit of the last id (the id is not included)

queueSize - the maximum number of entries in the blocing queue

Returns:

a quere where the results are written in concurrently

first

java.util.Date first()

return the date of the first entry

latest

java.util.Date latest()

return the date of the latest entry

Returns:

the date of the latest entry

query

java.util.concurrent.BlockingQueue<DCEntry> query(java.util.Date from,
                                                int queueSize)

retrieve a set of entries in the database; the result set contains all entries up to the most recent all retrieved objects are pushed to the blocking queue

Parameters:

from -

Returns:

a quere where the results are written in concurrently

writeSurrogates

int writeSurrogates(java.util.concurrent.BlockingQueue<DCEntry> queue,
                  java.io.File targetdir,
                  java.lang.String versioninfo,
                  int maxEntriesInFile)

close

void close()

close the connection to the database