/
recordset.go
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/
recordset.go
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// Copyright 2013-2014 Aerospike, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package aerospike
import (
. "github.com/aerospike/aerospike-client-go/types/atomic"
)
// Recordset encapsulates the result of Scan and Query commands.
type Recordset struct {
// Records is a channel on which the resulting records will be sent back.
Records chan *Record
// Errors is a channel on which all errors will be sent back.
Errors chan error
active *AtomicBool
chans []chan *Record
errs []chan error
commands []multiCommand
}
// NewRecordset generates a new RecordSet instance.
func NewRecordset(size int) *Recordset {
return &Recordset{
Records: make(chan *Record, size),
Errors: make(chan error, size),
active: NewAtomicBool(true),
commands: []multiCommand{},
}
}
// IsActive returns true if the operation hasn't been finished or cancelled.
func (rcs *Recordset) IsActive() bool {
return rcs.active.Get()
}
// Close all streams to different nodes.
func (rcs *Recordset) Close() {
rcs.active.Set(false)
for i := range rcs.commands {
// send signal to close
rcs.commands[i].Stop()
}
}
// drains a records channel into the results chan
func (rcs *Recordset) drainRecords(recChan chan *Record) {
// drain the results chan
for rec := range recChan {
rcs.Records <- rec
}
}
// drains a channel into the errors chan
func (rcs *Recordset) drainErrors(errChan chan error) {
// drain the results chan
for err := range errChan {
// if channel is closed, or is empty, exit the loop
rcs.Errors <- err
}
}