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/*
* This file is part of Go Responsiveness.
*
* Go Responsiveness is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software Foundation,
* either version 2 of the License, or (at your option) any later version.
* Go Responsiveness is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with Go Responsiveness. If not, see <https://www.gnu.org/licenses/>.
*/
package lgc
import (
"fmt"
"math/rand"
"sync"
)
type LoadGeneratingConnectionCollection struct {
Lock sync.Mutex
LGCs *[]LoadGeneratingConnection
}
func NewLoadGeneratingConnectionCollection() LoadGeneratingConnectionCollection {
return LoadGeneratingConnectionCollection{LGCs: new([]LoadGeneratingConnection)}
}
func (collection *LoadGeneratingConnectionCollection) Get(idx int) (*LoadGeneratingConnection, error) {
if collection.Lock.TryLock() {
collection.Lock.Unlock()
return nil, fmt.Errorf("collection is unlocked")
}
return collection.lockedGet(idx)
}
func (collection *LoadGeneratingConnectionCollection) lockedGet(idx int) (*LoadGeneratingConnection, error) {
return &(*collection.LGCs)[idx], nil
}
func (collection *LoadGeneratingConnectionCollection) Append(conn LoadGeneratingConnection) error {
if collection.Lock.TryLock() {
collection.Lock.Unlock()
return fmt.Errorf("collection is unlocked")
}
*collection.LGCs = append(*collection.LGCs, conn)
return nil
}
func (collection *LoadGeneratingConnectionCollection) Len() (int, error) {
if collection.Lock.TryLock() {
collection.Lock.Unlock()
return -1, fmt.Errorf("collection is unlocked")
}
return len(*collection.LGCs), nil
}
func (collection *LoadGeneratingConnectionCollection) GetRandom() (*LoadGeneratingConnection, error) {
if collection.Lock.TryLock() {
collection.Lock.Unlock()
return nil, fmt.Errorf("collection is unlocked")
}
idx := int(rand.Uint32())
idx = idx % len(*collection.LGCs)
return collection.lockedGet(idx)
}
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