117 lines
2.9 KiB
Go
117 lines
2.9 KiB
Go
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// Copyright 2016 Google Inc. All Rights Reserved.
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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 longrunning
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import (
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"fmt"
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"time"
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"github.com/golang/protobuf/ptypes"
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"github.com/golang/protobuf/ptypes/duration"
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"github.com/golang/protobuf/ptypes/timestamp"
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"golang.org/x/net/context"
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pb "google.golang.org/genproto/googleapis/longrunning"
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)
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func bestMomentInHistory() (*Operation, error) {
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t, err := time.Parse("2006-01-02 15:04:05.999999999 -0700 MST", "2009-11-10 23:00:00 +0000 UTC")
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if err != nil {
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return nil, err
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}
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resp, err := ptypes.TimestampProto(t)
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if err != nil {
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return nil, err
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}
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respAny, err := ptypes.MarshalAny(resp)
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if err != nil {
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return nil, err
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}
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metaAny, err := ptypes.MarshalAny(ptypes.DurationProto(1 * time.Hour))
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return &Operation{
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proto: &pb.Operation{
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Name: "best-moment",
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Done: true,
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Metadata: metaAny,
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Result: &pb.Operation_Response{
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Response: respAny,
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},
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},
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}, err
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}
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func ExampleOperation_Wait() {
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// Complex computation, might take a long time.
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op, err := bestMomentInHistory()
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if err != nil {
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// TODO: Handle err.
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}
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var ts timestamp.Timestamp
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err = op.Wait(context.TODO(), &ts)
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if err != nil && !op.Done() {
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fmt.Println("failed to fetch operation status", err)
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} else if err != nil && op.Done() {
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fmt.Println("operation completed with error", err)
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} else {
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fmt.Println(ptypes.TimestampString(&ts))
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}
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// Output:
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// 2009-11-10T23:00:00Z
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}
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func ExampleOperation_Metadata() {
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op, err := bestMomentInHistory()
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if err != nil {
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// TODO: Handle err.
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}
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// The operation might contain metadata.
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// In this example, the metadata contains the estimated length of time
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// the operation might take to complete.
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var meta duration.Duration
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if err := op.Metadata(&meta); err != nil {
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// TODO: Handle err.
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}
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d, err := ptypes.Duration(&meta)
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if err == ErrNoMetadata {
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fmt.Println("no metadata")
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} else if err != nil {
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// TODO: Handle err.
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} else {
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fmt.Println(d)
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}
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// Output:
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// 1h0m0s
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}
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func ExampleOperation_Cancel() {
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op, err := bestMomentInHistory()
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if err != nil {
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// TODO: Handle err.
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}
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if err := op.Cancel(context.Background()); err != nil {
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// TODO: Handle err.
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}
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}
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func ExampleOperation_Delete() {
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op, err := bestMomentInHistory()
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if err != nil {
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// TODO: Handle err.
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}
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if err := op.Delete(context.Background()); err != nil {
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// TODO: Handle err.
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}
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}
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