mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package clientv3_test
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import (
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"context"
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"fmt"
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"log"
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"github.com/coreos/etcd/clientv3"
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)
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func ExampleWatcher_watch() {
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cli, err := clientv3.New(clientv3.Config{
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Endpoints: endpoints,
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DialTimeout: dialTimeout,
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})
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if err != nil {
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log.Fatal(err)
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}
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defer cli.Close()
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rch := cli.Watch(context.Background(), "foo")
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for wresp := range rch {
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for _, ev := range wresp.Events {
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fmt.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
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}
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}
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// PUT "foo" : "bar"
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}
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func ExampleWatcher_watchWithPrefix() {
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cli, err := clientv3.New(clientv3.Config{
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Endpoints: endpoints,
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DialTimeout: dialTimeout,
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})
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if err != nil {
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log.Fatal(err)
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}
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defer cli.Close()
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rch := cli.Watch(context.Background(), "foo", clientv3.WithPrefix())
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for wresp := range rch {
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for _, ev := range wresp.Events {
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fmt.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
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}
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}
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// PUT "foo1" : "bar"
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}
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func ExampleWatcher_watchWithRange() {
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cli, err := clientv3.New(clientv3.Config{
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Endpoints: endpoints,
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DialTimeout: dialTimeout,
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})
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if err != nil {
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log.Fatal(err)
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}
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defer cli.Close()
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// watches within ['foo1', 'foo4'), in lexicographical order
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rch := cli.Watch(context.Background(), "foo1", clientv3.WithRange("foo4"))
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for wresp := range rch {
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for _, ev := range wresp.Events {
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fmt.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
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}
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}
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// PUT "foo1" : "bar"
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// PUT "foo2" : "bar"
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// PUT "foo3" : "bar"
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}
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func ExampleWatcher_watchWithProgressNotify() {
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cli, err := clientv3.New(clientv3.Config{
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Endpoints: endpoints,
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DialTimeout: dialTimeout,
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})
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if err != nil {
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log.Fatal(err)
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}
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rch := cli.Watch(context.Background(), "foo", clientv3.WithProgressNotify())
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wresp := <-rch
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fmt.Printf("wresp.Header.Revision: %d\n", wresp.Header.Revision)
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fmt.Println("wresp.IsProgressNotify:", wresp.IsProgressNotify())
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// wresp.Header.Revision: 0
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// wresp.IsProgressNotify: true
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}
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