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package main
import (
"fmt"
"os"
"time"
"go.sudomsg.com/cache"
)
func main() {
// Create an in-memory cache with LRU eviction policy
db, err := cache.Open[int, int](
"cache.db",
cache.WithPolicy(cache.PolicyLRU),
cache.WithMaxCost(20),
cache.SetCleanupTime(1*time.Second),
)
if err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
defer func() {
err := db.Close()
if err != nil {
fmt.Println("Error:", err)
}
}()
fmt.Println("Loaded Cache")
// Check which keys are present
for n := range 4 {
key := n + 1
value, _, err := db.GetValue(key)
if err != nil {
fmt.Printf("Key %d not found\n", key)
} else {
fmt.Printf("Key %d found with value: %d\n", key, value)
}
}
fmt.Println("Set Values")
// Set values
if err := db.Set(1, -1, 10*time.Second); err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
if err := db.Set(2, -2, 10*time.Second); err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
if err := db.Set(3, -3, 10*time.Second); err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
// Access some keys
if _, _, err := db.GetValue(1); err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
if _, _, err := db.GetValue(2); err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
fmt.Println("Add Key 4")
// Add another key to trigger eviction
if err := db.Set(4, -4, 0); err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
fmt.Println("Sleep")
time.Sleep(2 * time.Second)
fmt.Println("Resume")
// Check which keys are present
for n := range 4 {
key := n + 1
value, _, err := db.GetValue(key)
if err != nil {
fmt.Printf("Key %d not found\n", key)
} else {
fmt.Printf("Key %d found with value: %d\n", key, value)
}
}
}
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