// Copyright 2016 The etcd Authors
//
// 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 ExampleWatcher_watch() {
cli, err := clientv3.New(clientv3.Config{
Endpoints: endpoints,
DialTimeout: dialTimeout,
})
if err != nil {
log.Fatal(err)
}
defer cli.Close()
rch := cli.Watch(context.Background(), "foo")
for wresp := range rch {
for _, ev := range wresp.Events {
fmt.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
}
}
// PUT "foo" : "bar"
}
func ExampleWatcher_watchWithPrefix() {
cli, err := clientv3.New(clientv3.Config{
Endpoints: endpoints,
DialTimeout: dialTimeout,
})
if err != nil {
log.Fatal(err)
}
defer cli.Close()
rch := cli.Watch(context.Background(), "foo", clientv3.WithPrefix())
for wresp := range rch {
for _, ev := range wresp.Events {
fmt.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
}
}
// PUT "foo1" : "bar"
}
func ExampleWatcher_watchWithRange() {
cli, err := clientv3.New(clientv3.Config{
Endpoints: endpoints,
DialTimeout: dialTimeout,
})
if err != nil {
log.Fatal(err)
}
defer cli.Close()
// watches within ['foo1', 'foo4'), in lexicographical order
rch := cli.Watch(context.Background(), "foo1", clientv3.WithRange("foo4"))
for wresp := range rch {
for _, ev := range wresp.Events {
fmt.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
}
}
// PUT "foo1" : "bar"
// PUT "foo2" : "bar"
// PUT "foo3" : "bar"
}
func ExampleWatcher_watchWithProgressNotify() {
cli, err := clientv3.New(clientv3.Config{
Endpoints: endpoints,
DialTimeout: dialTimeout,
})
if err != nil {
log.Fatal(err)
}
rch := cli.Watch(context.Background(), "foo", clientv3.WithProgressNotify())
wresp := <-rch
fmt.Printf("wresp.Header.Revision: %d\n", wresp.Header.Revision)
fmt.Println("wresp.IsProgressNotify:", wresp.IsProgressNotify())
// wresp.Header.Revision: 0
// wresp.IsProgressNotify: true
}