135 lines
2.9 KiB
Go
135 lines
2.9 KiB
Go
// Copyright 2016 CoreOS, 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 clientv3_test
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
|
|
"github.com/coreos/etcd/clientv3"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
func ExampleLease_create() {
|
|
cli, err := clientv3.New(clientv3.Config{
|
|
Endpoints: endpoints,
|
|
DialTimeout: dialTimeout,
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer cli.Close()
|
|
|
|
// minimum lease TTL is 5-second
|
|
resp, err := cli.Create(context.TODO(), 5)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// after 5 seconds, the key 'foo' will be removed
|
|
_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func ExampleLease_revoke() {
|
|
cli, err := clientv3.New(clientv3.Config{
|
|
Endpoints: endpoints,
|
|
DialTimeout: dialTimeout,
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer cli.Close()
|
|
|
|
resp, err := cli.Create(context.TODO(), 5)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// revoking lease expires the key attached to its lease ID
|
|
_, err = cli.Revoke(context.TODO(), clientv3.LeaseID(resp.ID))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
gresp, err := cli.Get(context.TODO(), "foo")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
fmt.Println("number of keys:", len(gresp.Kvs))
|
|
// number of keys: 0
|
|
}
|
|
|
|
func ExampleLease_keepAlive() {
|
|
cli, err := clientv3.New(clientv3.Config{
|
|
Endpoints: endpoints,
|
|
DialTimeout: dialTimeout,
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer cli.Close()
|
|
|
|
resp, err := cli.Create(context.TODO(), 5)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// the key 'foo' will be kept forever
|
|
_, err = cli.KeepAlive(context.TODO(), clientv3.LeaseID(resp.ID))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func ExampleLease_keepAliveOnce() {
|
|
cli, err := clientv3.New(clientv3.Config{
|
|
Endpoints: endpoints,
|
|
DialTimeout: dialTimeout,
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer cli.Close()
|
|
|
|
resp, err := cli.Create(context.TODO(), 5)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// to renew the lease only once
|
|
_, err = cli.KeepAliveOnce(context.TODO(), clientv3.LeaseID(resp.ID))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|