org.hawkular.rx.cassandra.driver

Class ResultSetToRowsTransformer

java.lang.Object

org.hawkular.rx.cassandra.driver.ResultSetToRowsTransformer

All Implemented Interfaces:

rx.functions.Func1<rx.Observable<com.datastax.driver.core.ResultSet>,rx.Observable<com.datastax.driver.core.Row>>, rx.functions.Function, rx.Observable.Transformer<com.datastax.driver.core.ResultSet,com.datastax.driver.core.Row>

public class ResultSetToRowsTransformer
extends Object
implements rx.Observable.Transformer<com.datastax.driver.core.ResultSet,com.datastax.driver.core.Row>

Transforms an Observable of ResultSet into an Observable of Row. Use this transformer together with Observable.compose(Transformer) instead of:

 Observable<ResultSet> resultSetObservable = ...;
 Observable<Row> rowObservable = resultSetObservable.flatMap(resultSet -> {
   // ResultSet is an Iterable<Row>
   return Observable.from(resultSet);
 })
 

The code above may block the operating thread if the ResultSet is not fully fetched.

Author:

Thomas Segismont

Constructor Summary

Constructors

Constructor and Description
ResultSetToRowsTransformer() Creates a new transformer operating on the Schedulers.computation() scheduler.
ResultSetToRowsTransformer(rx.Scheduler scheduler) Creates a new transformer operating on the specified scheduler.

Method Summary

Modifier and Type	Method and Description
rx.Observable<com.datastax.driver.core.Row>	call(rx.Observable<com.datastax.driver.core.ResultSet> resultSetObservable)

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultSetToRowsTransformer

public ResultSetToRowsTransformer()

Creates a new transformer operating on the Schedulers.computation() scheduler.

ResultSetToRowsTransformer

public ResultSetToRowsTransformer(rx.Scheduler scheduler)

Creates a new transformer operating on the specified scheduler.

Parameters:

scheduler - the scheduler on which this transformer must operate

Method Detail

call

public rx.Observable<com.datastax.driver.core.Row> call(rx.Observable<com.datastax.driver.core.ResultSet> resultSetObservable)

Specified by:

call in interface rx.functions.Func1<rx.Observable<com.datastax.driver.core.ResultSet>,rx.Observable<com.datastax.driver.core.Row>>