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53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
// Copyright 2011 Google Inc. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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/*
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Package capability exposes information about outages and scheduled downtime
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for specific API capabilities.
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This package does not work in App Engine "flexible environment".
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Example:
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if !capability.Enabled(c, "datastore_v3", "write") {
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// show user a different page
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}
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*/
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package capability // import "google.golang.org/appengine/capability"
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import (
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"golang.org/x/net/context"
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"google.golang.org/appengine/internal"
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"google.golang.org/appengine/log"
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pb "google.golang.org/appengine/internal/capability"
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)
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// Enabled returns whether an API's capabilities are enabled.
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// The wildcard "*" capability matches every capability of an API.
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// If the underlying RPC fails (if the package is unknown, for example),
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// false is returned and information is written to the application log.
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func Enabled(ctx context.Context, api, capability string) bool {
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req := &pb.IsEnabledRequest{
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Package: &api,
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Capability: []string{capability},
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}
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res := &pb.IsEnabledResponse{}
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if err := internal.Call(ctx, "capability_service", "IsEnabled", req, res); err != nil {
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log.Warningf(ctx, "capability.Enabled: RPC failed: %v", err)
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return false
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}
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switch *res.SummaryStatus {
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case pb.IsEnabledResponse_ENABLED,
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pb.IsEnabledResponse_SCHEDULED_FUTURE,
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pb.IsEnabledResponse_SCHEDULED_NOW:
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return true
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case pb.IsEnabledResponse_UNKNOWN:
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log.Errorf(ctx, "capability.Enabled: unknown API capability %s/%s", api, capability)
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return false
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default:
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return false
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}
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}
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