func MyCassandraSave(cp gossie.ConnectionPool, data *ExampleData) error {
mapping, _ := gossie.NewMapping(&ExampleData{})
b := cp.Batch()
b.Insert(mapping, data)
return b.Run()
}
func MyCassandraLoad(cp gossie.ConnectionPool, id string) (*ExampleData, error) {
mapping, _ := gossie.NewMapping(&ExampleData{})
query := cp.Query(mapping)
result, err := query.Get(id)
if err != nil {
return nil, err
}
data := &ExampleData{}
err = result.Next(data)
return data, err
}
// getColumnFamily starts a read in a goroutine and returns a channel.
func getColumnFamily(cf string, pool gossie.ConnectionPool, rowKey string) <-chan rowResult {
outChan := make(chan rowResult)
go func() {
glog.V(3).Infoln("Reading data for " + cf + " ...")
row, err := pool.Reader().Cf(cf).Get([]byte(rowKey))
if err != nil {
outChan <- rowResult{nil, err}
}
outChan <- rowResult{row, nil}
}()
return outChan
}
// getColumnFamilyRange starts a range read in a goroutine and returns a channel.
func getColumnFamilyRange(cf string, pool gossie.ConnectionPool, startPrefix string,
endPrefix string, maxResults int) <-chan rowResults {
outChan := make(chan rowResults)
go func() {
glog.V(3).Infoln("Reading data for " + cf + " ...")
rows, err := pool.Reader().Cf(cf).ReturnNilRows(true).RangeGet(
&gossie.Range{Start: []byte(startPrefix), End: []byte(endPrefix), Count: maxResults})
if err != nil {
outChan <- rowResults{nil, err}
}
outChan <- rowResults{rows, nil}
}()
return outChan
}
