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server.go
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server.go
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package server
import (
"context"
"errors"
"github.com/Azure/azure-sdk-for-go/sdk/azcore/runtime"
"github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/resources/armresources"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
gpb "github.com/element-of-surprise/examples/testing/servwithclients/proto/greeter/proto"
pb "github.com/element-of-surprise/examples/testing/servwithclients/server/proto"
)
// resourceClient represents a client for the Azure Resource Manager API.
// Usually implemented with github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/resources/armresources.ResourceGroupsClient{}.
type resourceClient interface {
CreateOrUpdate(ctx context.Context, resourceGroupName string, parameters armresources.ResourceGroup, options *armresources.ResourceGroupsClientCreateOrUpdateOptions) (armresources.ResourceGroupsClientCreateOrUpdateResponse, error)
BeginDelete(ctx context.Context, resourceGroupName string, options *armresources.ResourceGroupsClientBeginDeleteOptions) (*runtime.Poller[armresources.ResourceGroupsClientDeleteResponse], error)
Get(ctx context.Context, resourceGroupName string, options *armresources.ResourceGroupsClientGetOptions) (armresources.ResourceGroupsClientGetResponse, error)
NewListPager(options *armresources.ResourceGroupsClientListOptions) *runtime.Pager[armresources.ResourceGroupsClientListResponse]
Update(ctx context.Context, resourceGroupName string, parameters armresources.ResourceGroupPatchable, options *armresources.ResourceGroupsClientUpdateOptions) (armresources.ResourceGroupsClientUpdateResponse, error)
}
// Server implements a gRPC server that acts as a proxy for the greeter service and the Azure Resource Manager.
type Server struct {
pb.UnimplementedRPCServer
greeterClient gpb.GreeterClient
resourceClient resourceClient
}
// New is the constructore for Server.
func New(greeter gpb.GreeterClient, resources resourceClient) (*Server, error) {
if greeter == nil {
return nil, errors.New("greeter is required")
}
if resources == nil {
return nil, errors.New("resources is required")
}
return &Server{
greeterClient: greeter,
resourceClient: resources,
}, nil
}
// SayHello implements gpb.GreeterClient.SayHello().
func (s *Server) SayHello(ctx context.Context, in *gpb.HelloRequest) (*gpb.HelloReply, error) {
const maxTries = 3
var resp *gpb.HelloReply
var err error
for i := 0; i < maxTries; i++ {
resp, err = s.greeterClient.SayHello(ctx, in)
if err == nil {
return resp, nil
}
switch status.Code(err) {
case codes.Unavailable:
continue
default:
return nil, err
}
}
return nil, err
}
func (s *Server) CreateResourceGroup(ctx context.Context, in *pb.CreateResourceGroupRequest) (*pb.CreateResourceGroupReply, error) {
_, err := s.resourceClient.CreateOrUpdate(ctx, in.GetName(), armresources.ResourceGroup{Location: &in.Region}, nil)
if err != nil {
return nil, err
}
return &pb.CreateResourceGroupReply{Status: "Success"}, nil
}
func (s *Server) ReadResourceGroup(ctx context.Context, in *pb.ReadResourceGroupRequest) (*pb.ReadResourceGroupReply, error) {
_, err := s.resourceClient.Get(ctx, in.GetId(), nil)
if err != nil {
return nil, err
}
return &pb.ReadResourceGroupReply{Status: "Success"}, nil
}
func (s *Server) UpdateResourceGroup(ctx context.Context, in *pb.UpdateResourceGroupRequest) (*pb.UpdateResourceGroupReply, error) {
_, err := s.resourceClient.Update(ctx, in.GetName(), armresources.ResourceGroupPatchable{ManagedBy: &in.Id}, nil)
if err != nil {
return nil, err
}
return &pb.UpdateResourceGroupReply{Status: "Success"}, nil
}
func (s *Server) DeleteResourceGroup(ctx context.Context, in *pb.DeleteResourceGroupRequest) (*pb.DeleteResourceGroupReply, error) {
poll, err := s.resourceClient.BeginDelete(ctx, in.GetId(), nil)
if err != nil {
return nil, err
}
_, err = poll.PollUntilDone(ctx, nil)
if err != nil {
return nil, err
}
return &pb.DeleteResourceGroupReply{Status: "Success"}, nil
}
func (s *Server) ListResourceGroups(ctx context.Context, in *pb.ListResourceGroupsRequest) (*pb.ListResourceGroupsReply, error) {
pager := s.resourceClient.NewListPager(nil)
groups := []*pb.ResourceGroup{}
for pager.More() {
page, err := pager.NextPage(ctx)
if err != nil {
return nil, err
}
for _, group := range page.Value {
if group.Name == nil {
continue
}
groups = append(groups, &pb.ResourceGroup{Name: *group.Name})
}
}
return &pb.ListResourceGroupsReply{ResourceGroups: groups}, nil
}