Package org.aksw.jena_sparql_api.cache.staging

Class CacheBackendDaoPostgres

java.lang.Object

org.aksw.jena_sparql_api.cache.staging.CacheBackendDaoPostgres

All Implemented Interfaces:

CacheBackendDao

public class CacheBackendDaoPostgres
extends Object
implements CacheBackendDao

Author:

raven

Constructor Summary

Constructors

Constructor	Description
CacheBackendDaoPostgres()
CacheBackendDaoPostgres(long timeToLive)

Method Summary

Modifier and Type	Method	Description
String	createHashRoot(String service, String queryString)
CacheEntryImpl	lookup(Connection conn, String service, String queryString, boolean closeConn)	The lookup returns an InputStream + metadata
void	write(Connection conn, String service, String queryString, InputStream in)

Methods inherited from class java.lang.Object

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

Constructor Details

CacheBackendDaoPostgres

public CacheBackendDaoPostgres()

CacheBackendDaoPostgres

public CacheBackendDaoPostgres(long timeToLive)

Method Details

lookup

public CacheEntryImpl lookup(Connection conn,
 String service,
 String queryString,
 boolean closeConn)
                      throws SQLException

Description copied from interface: CacheBackendDao

The lookup returns an InputStream + metadata

Specified by:

lookup in interface CacheBackendDao

Parameters:

closeConn - Whether to COMMIT(!) AND CLOSE the connection after consuming or closing the result of a lookup operation

Returns:

Throws:

SQLException

write

public void write(Connection conn,
 String service,
 String queryString,
 InputStream in)
           throws SQLException,
IOException

Specified by:

write in interface CacheBackendDao

Throws:

SQLException

IOException

createHashRoot

public String createHashRoot(String service,
 String queryString)