func Example() {
// Open a DB for reading and writing (creating if not existing)
db, err := mdbm.Open("my.db")
if err != nil {
log.Fatal("Cannot open DB: " + err.Error())
}
defer db.Close()
// Store some key-value
err = db.Put([]byte("key1"), []byte("val1"))
if err != nil {
log.Println("Cannot store \"key1\":", err.Error())
}
// Get value
val, err := db.Get([]byte("key1"))
if err != nil {
log.Println("Cannot fetch value for \"key1\"", err.Error())
}
// Populate DB with entries
for i := 0; i < 1000000; i++ {
k := []byte(fmt.Sprintf("%dx%d", i, i))
v := []byte(fmt.Sprintf("%d", i*i))
db.Put(k, v)
}
// Iterate through all entries in DB
for db.Fetch() {
k, v := db.Entry()
}
}
func ExampleOpen() {
// Open with user-defined options
flags := mdbm.ReadWrite | mdbm.Truncate | mdbm.Create
db, err := mdbm.Open("my.db", mdbm.Flags(flags), mdbm.Perms(0666))
if err != nil {
log.Fatal("Cannot open my.db: " + err.Error())
}
defer db.Close()
}
func ExampleMDBM_Fetch() {
db, err := mdbm.Open("my.db")
if err != nil {
log.Fatal("Cannot open my.db: " + err.Error())
}
defer db.Close()
// Iterate with db.Fetch()
for db.Fetch() {
_, v := db.Entry()
if string(v) == "127.0.0.1" {
log.Println("Localhost IP exists!")
// Make sure to release the lock before break
db.Unlock()
break
}
}
}