org.apache.solr.client.solrj.io.stream

Class JDBCStream

java.lang.Object

org.apache.solr.client.solrj.io.stream.TupleStream

org.apache.solr.client.solrj.io.stream.JDBCStream

All Implemented Interfaces:

Closeable, Serializable, AutoCloseable, Expressible, MapSerializable, MapWriter

public class JDBCStream
extends TupleStream
implements Expressible

Connects to a datasource using a registered JDBC driver and execute a query. The results of that query will be returned as tuples. An EOF tuple will indicate that all have been read. Supported Datatypes JDBC Type | Tuple Type --------------|--------------- String | String Short | Long Integer | Long Long | Long Float | Double Double | Double Boolean | Boolean

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.solr.common.MapWriter

MapWriter.EntryWriter

Field Summary

Fields

Modifier and Type	Field and Description
protected ResultSet	resultSet
protected StreamContext	streamContext

Constructor Summary

Constructors

Constructor and Description
JDBCStream(StreamExpression expression, StreamFactory factory)
JDBCStream(String connectionUrl, String sqlQuery, StreamComparator definedSort)
JDBCStream(String connectionUrl, String sqlQuery, StreamComparator definedSort, Properties connectionProperties, String driverClassName)

Method Summary

Modifier and Type	Method and Description
List<TupleStream>	children()
void	close() Closes the JDBCStream
StreamComparator	getStreamSort()
void	open() Opens the JDBCStream
Tuple	read()
void	setStreamContext(StreamContext context)
Explanation	toExplanation(StreamFactory factory) Returns an explanation about the stream object
StreamExpressionParameter	toExpression(StreamFactory factory)

Methods inherited from class org.apache.solr.client.solrj.io.stream.TupleStream

getCost, getStreamNodeId, writeMap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.common.MapWriter

toMap

Field Detail

resultSet

protected ResultSet resultSet

streamContext

protected transient StreamContext streamContext

Constructor Detail

JDBCStream

public JDBCStream(String connectionUrl,
                  String sqlQuery,
                  StreamComparator definedSort)
           throws IOException

Throws:

IOException

JDBCStream

public JDBCStream(String connectionUrl,
                  String sqlQuery,
                  StreamComparator definedSort,
                  Properties connectionProperties,
                  String driverClassName)
           throws IOException

Throws:

IOException

JDBCStream

public JDBCStream(StreamExpression expression,
                  StreamFactory factory)
           throws IOException

Throws:

IOException

Method Detail

setStreamContext

public void setStreamContext(StreamContext context)

Specified by:

setStreamContext in class TupleStream

open

public void open()
          throws IOException

Opens the JDBCStream

Specified by:

open in class TupleStream

Throws:

IOException

close

public void close()
           throws IOException

Closes the JDBCStream

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class TupleStream

Throws:

IOException

read

public Tuple read()
           throws IOException

Specified by:

read in class TupleStream

Throws:

IOException

toExpression

public StreamExpressionParameter toExpression(StreamFactory factory)
                                       throws IOException

Specified by:

toExpression in interface Expressible

Throws:

IOException

toExplanation

public Explanation toExplanation(StreamFactory factory)
                          throws IOException

Description copied from interface: Expressible

Returns an explanation about the stream object

Specified by:

toExplanation in interface Expressible

Specified by:

toExplanation in class TupleStream

Parameters:

factory - Stream factory for this, contains information about the function name

Returns:

Explanation about this stream object containing explanations of any child stream objects

Throws:

IOException - throw on any error

children

public List<TupleStream> children()

Specified by:

children in class TupleStream

getStreamSort

public StreamComparator getStreamSort()

Specified by:

getStreamSort in class TupleStream