clientv3: add more code examples

clientv3/example_watch_test.go

@@ -0,0 +1,67 @@
+// 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/Godeps/_workspace/src/golang.org/x/net/context"
+	"github.com/coreos/etcd/clientv3"
+)
+
+func ExampleWatcher_watch() {
+	cli, err := clientv3.New(clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: dialTimeout,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer cli.Close()
+
+	wc := clientv3.NewWatcher(cli)
+	defer wc.Close()
+
+	rch := wc.Watch(context.Background(), "foo", 0)
+	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_watchPrefix() {
+	cli, err := clientv3.New(clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: dialTimeout,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer cli.Close()
+
+	wc := clientv3.NewWatcher(cli)
+	defer wc.Close()
+
+	rch := wc.WatchPrefix(context.Background(), "foo", 0)
+	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"
+}