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114 lines
3.5 KiB
Go
114 lines
3.5 KiB
Go
// Copyright 2013 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 module provides functions for interacting with modules.
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The appengine package contains functions that report the identity of the app,
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including the module name.
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*/
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package module // import "google.golang.org/appengine/module"
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import (
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"github.com/golang/protobuf/proto"
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"golang.org/x/net/context"
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"google.golang.org/appengine/internal"
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pb "google.golang.org/appengine/internal/modules"
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)
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// List returns the names of modules belonging to this application.
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func List(c context.Context) ([]string, error) {
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req := &pb.GetModulesRequest{}
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res := &pb.GetModulesResponse{}
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err := internal.Call(c, "modules", "GetModules", req, res)
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return res.Module, err
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}
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// NumInstances returns the number of instances of the given module/version.
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// If either argument is the empty string it means the default.
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func NumInstances(c context.Context, module, version string) (int, error) {
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req := &pb.GetNumInstancesRequest{}
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if module != "" {
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req.Module = &module
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}
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if version != "" {
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req.Version = &version
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}
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res := &pb.GetNumInstancesResponse{}
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if err := internal.Call(c, "modules", "GetNumInstances", req, res); err != nil {
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return 0, err
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}
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return int(*res.Instances), nil
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}
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// SetNumInstances sets the number of instances of the given module.version to the
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// specified value. If either module or version are the empty string it means the
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// default.
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func SetNumInstances(c context.Context, module, version string, instances int) error {
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req := &pb.SetNumInstancesRequest{}
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if module != "" {
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req.Module = &module
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}
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if version != "" {
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req.Version = &version
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}
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req.Instances = proto.Int64(int64(instances))
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res := &pb.SetNumInstancesResponse{}
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return internal.Call(c, "modules", "SetNumInstances", req, res)
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}
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// Versions returns the names of the versions that belong to the specified module.
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// If module is the empty string, it means the default module.
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func Versions(c context.Context, module string) ([]string, error) {
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req := &pb.GetVersionsRequest{}
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if module != "" {
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req.Module = &module
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}
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res := &pb.GetVersionsResponse{}
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err := internal.Call(c, "modules", "GetVersions", req, res)
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return res.GetVersion(), err
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}
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// DefaultVersion returns the default version of the specified module.
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// If module is the empty string, it means the default module.
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func DefaultVersion(c context.Context, module string) (string, error) {
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req := &pb.GetDefaultVersionRequest{}
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if module != "" {
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req.Module = &module
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}
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res := &pb.GetDefaultVersionResponse{}
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err := internal.Call(c, "modules", "GetDefaultVersion", req, res)
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return res.GetVersion(), err
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}
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// Start starts the specified version of the specified module.
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// If either module or version are the empty string, it means the default.
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func Start(c context.Context, module, version string) error {
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req := &pb.StartModuleRequest{}
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if module != "" {
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req.Module = &module
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}
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if version != "" {
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req.Version = &version
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}
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res := &pb.StartModuleResponse{}
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return internal.Call(c, "modules", "StartModule", req, res)
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}
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// Stop stops the specified version of the specified module.
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// If either module or version are the empty string, it means the default.
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func Stop(c context.Context, module, version string) error {
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req := &pb.StopModuleRequest{}
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if module != "" {
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req.Module = &module
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}
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if version != "" {
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req.Version = &version
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}
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res := &pb.StopModuleResponse{}
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return internal.Call(c, "modules", "StopModule", req, res)
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}
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