gr.uoa.di.madgik.searchlibrary.operatorlibrary.extjdbc
Class JdbcOp

java.lang.Object
  gr.uoa.di.madgik.searchlibrary.operatorlibrary.extjdbc.JdbcOp

public class JdbcOp
extends Object

Operator class used to perform an external search to a jdbc database creating a org.gcube.searchservice.searchlibrary.resultset.ResultSet with the produced results

Author:

UoA

Field Summary

static String	ObjectIdFieldNameDef The default name for the Field of the object id
static String	PayloadFieldNameDef The default name for the Field of the payload

Constructor Summary

JdbcOp(long timeout, TimeUnit timeUnit, StatsContainer stats)
Creates a new JdbcOp with the default field names for object id and payload

JdbcOp(StatsContainer stats)
Creates a new JdbcOp ith the default timeout and the default field names for object id and payload

JdbcOp(String objectIdFieldName, String payloadFieldName, long timeout, TimeUnit timeUnit, StatsContainer stats)
Creates a new JdbcOp with configurable timeout and field names for object id and payload

Method Summary

URI	compute(String query) Perform the external search

Methods inherited from class java.lang.Object

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

Field Detail

ObjectIdFieldNameDef

public static String ObjectIdFieldNameDef

The default name for the Field of the object id

PayloadFieldNameDef

public static String PayloadFieldNameDef

The default name for the Field of the payload

Constructor Detail

JdbcOp

public JdbcOp(StatsContainer stats)

Creates a new JdbcOp ith the default timeout and the default field names for object id and payload

Parameters:

stats - statistics

JdbcOp

public JdbcOp(long timeout,
              TimeUnit timeUnit,
              StatsContainer stats)

Creates a new JdbcOp with the default field names for object id and payload

Parameters:

timeUnit - The time unit of the timeout

stats - Statistics

JdbcOp

public JdbcOp(String objectIdFieldName,
              String payloadFieldName,
              long timeout,
              TimeUnit timeUnit,
              StatsContainer stats)

Creates a new JdbcOp with configurable timeout and field names for object id and payload

Parameters:

objectIdFieldName - The name of the Field which will hold the object id

payloadFieldName - The name of the Field which will hold the payload

timeout - The timeout which will be used by the writer

timeUnit - The time unit of the timeout

stats - Statistics

Method Detail

compute

public URI compute(String query)
            throws Exception

Perform the external search

Parameters:

query - The query string

Returns:

The locator of the output

Throws:

Exception - An unrecoverable for the operation error occured