| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build mojo |
| |
| // Implementation of Syncbase Mojo stubs. Our strategy is to translate Mojo stub |
| // requests into Vanadium stub requests, and Vanadium stub responses into Mojo |
| // stub responses. As part of this procedure, we synthesize "fake" ctx and call |
| // objects to pass to the Vanadium stubs. |
| |
| package server |
| |
| import ( |
| "bytes" |
| "fmt" |
| "strings" |
| |
| "mojo/public/go/bindings" |
| |
| mojom "mojom/syncbase" |
| wire "v.io/syncbase/v23/services/syncbase" |
| nosqlwire "v.io/syncbase/v23/services/syncbase/nosql" |
| "v.io/v23/context" |
| "v.io/v23/rpc" |
| "v.io/v23/security/access" |
| "v.io/v23/services/permissions" |
| "v.io/v23/verror" |
| "v.io/v23/vtrace" |
| ) |
| |
| const NoSchema int32 = -1 |
| |
| type mojoImpl struct { |
| ctx *context.T |
| srv rpc.Server |
| disp rpc.Dispatcher |
| } |
| |
| func NewMojoImpl(ctx *context.T, srv rpc.Server, disp rpc.Dispatcher) *mojoImpl { |
| return &mojoImpl{ctx: ctx, srv: srv, disp: disp} |
| } |
| |
| func methodDesc(desc rpc.InterfaceDesc, name string) rpc.MethodDesc { |
| for _, method := range desc.Methods { |
| if method.Name == name { |
| return method |
| } |
| } |
| panic(fmt.Sprintf("unknown method: %s.%s", desc.Name, name)) |
| } |
| |
| func (m *mojoImpl) newCtxCall(suffix string, method rpc.MethodDesc) (*context.T, rpc.ServerCall) { |
| ctx, _ := vtrace.WithNewTrace(m.ctx) |
| return ctx, newMojoServerCall(ctx, m.srv, suffix, method) |
| } |
| |
| //////////////////////////////////////// |
| // Struct converters |
| |
| func toMojoError(err error) mojom.Error { |
| if err == nil { |
| return mojom.Error{} |
| } |
| return mojom.Error{ |
| Id: string(verror.ErrorID(err)), |
| ActionCode: uint32(verror.Action(err)), |
| Msg: err.Error(), |
| } |
| } |
| |
| func toV23Perms(mPerms mojom.Perms) (access.Permissions, error) { |
| return access.ReadPermissions(strings.NewReader(mPerms.Json)) |
| } |
| |
| func toMojoPerms(vPerms access.Permissions) (mojom.Perms, error) { |
| b := new(bytes.Buffer) |
| if err := access.WritePermissions(b, vPerms); err != nil { |
| return mojom.Perms{}, err |
| } |
| return mojom.Perms{Json: b.String()}, nil |
| } |
| |
| //////////////////////////////////////// |
| // Stub getters |
| |
| func (m *mojoImpl) lookupAndAuthorize(ctx *context.T, call rpc.ServerCall, suffix string) (interface{}, error) { |
| resInt, auth, err := m.disp.Lookup(ctx, suffix) |
| if err != nil { |
| return nil, err |
| } |
| if err := auth.Authorize(ctx, call.Security()); err != nil { |
| return nil, verror.New(verror.ErrNoAccess, ctx, err) |
| } |
| return resInt, nil |
| } |
| |
| func (m *mojoImpl) getService(ctx *context.T, call rpc.ServerCall) (wire.ServiceServerStubMethods, error) { |
| resInt, err := m.lookupAndAuthorize(ctx, call, "") |
| if err != nil { |
| return nil, err |
| } |
| if res, ok := resInt.(wire.ServiceServerStubMethods); !ok { |
| return nil, verror.NewErrInternal(ctx) |
| } else { |
| return res, nil |
| } |
| } |
| |
| func (m *mojoImpl) getApp(ctx *context.T, call rpc.ServerCall, name string) (wire.AppServerStubMethods, error) { |
| resInt, err := m.lookupAndAuthorize(ctx, call, name) |
| if err != nil { |
| return nil, err |
| } |
| if res, ok := resInt.(wire.AppServerStubMethods); !ok { |
| return nil, verror.NewErrInternal(ctx) |
| } else { |
| return res, nil |
| } |
| } |
| |
| func (m *mojoImpl) getDb(ctx *context.T, call rpc.ServerCall, name string) (nosqlwire.DatabaseServerStubMethods, error) { |
| resInt, err := m.lookupAndAuthorize(ctx, call, name) |
| if err != nil { |
| return nil, err |
| } |
| if res, ok := resInt.(nosqlwire.DatabaseServerStubMethods); !ok { |
| return nil, verror.NewErrInternal(ctx) |
| } else { |
| return res, nil |
| } |
| } |
| |
| func (m *mojoImpl) getTable(ctx *context.T, call rpc.ServerCall, name string) (nosqlwire.TableServerStubMethods, error) { |
| resInt, err := m.lookupAndAuthorize(ctx, call, name) |
| if err != nil { |
| return nil, err |
| } |
| if res, ok := resInt.(nosqlwire.TableServerStubMethods); !ok { |
| return nil, verror.NewErrInternal(ctx) |
| } else { |
| return res, nil |
| } |
| } |
| |
| func (m *mojoImpl) getRow(ctx *context.T, call rpc.ServerCall, name string) (nosqlwire.RowServerStubMethods, error) { |
| resInt, err := m.lookupAndAuthorize(ctx, call, name) |
| if err != nil { |
| return nil, err |
| } |
| if res, ok := resInt.(nosqlwire.RowServerStubMethods); !ok { |
| return nil, verror.NewErrInternal(ctx) |
| } else { |
| return res, nil |
| } |
| } |
| |
| //////////////////////////////////////// |
| // Service |
| |
| // TODO(sadovsky): All stub implementations return a nil error (the last return |
| // value), since that error doesn't make it back to the IPC client. Chat with |
| // rogulenko@ about whether we should change the Go Mojo stub generator to drop |
| // these errors. |
| func (m *mojoImpl) ServiceGetPermissions() (mojom.Error, mojom.Perms, string, error) { |
| ctx, call := m.newCtxCall("", methodDesc(permissions.ObjectDesc, "GetPermissions")) |
| stub, err := m.getService(ctx, call) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| vPerms, version, err := stub.GetPermissions(ctx, call) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| mPerms, err := toMojoPerms(vPerms) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| return toMojoError(err), mPerms, version, nil |
| } |
| |
| func (m *mojoImpl) ServiceSetPermissions(mPerms mojom.Perms, version string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall("", methodDesc(permissions.ObjectDesc, "SetPermissions")) |
| stub, err := m.getService(ctx, call) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| vPerms, err := toV23Perms(mPerms) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.SetPermissions(ctx, call, vPerms, version) |
| return toMojoError(err), nil |
| } |
| |
| //////////////////////////////////////// |
| // App |
| |
| func (m *mojoImpl) AppCreate(name string, mPerms mojom.Perms) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(wire.AppDesc, "Create")) |
| stub, err := m.getApp(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| vPerms, err := toV23Perms(mPerms) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Create(ctx, call, vPerms) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) AppDelete(name string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(wire.AppDesc, "Delete")) |
| stub, err := m.getApp(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Delete(ctx, call) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) AppExists(name string) (mojom.Error, bool, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(wire.AppDesc, "Exists")) |
| stub, err := m.getApp(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), false, nil |
| } |
| exists, err := stub.Exists(ctx, call) |
| return toMojoError(err), exists, nil |
| } |
| |
| func (m *mojoImpl) AppGetPermissions(name string) (mojom.Error, mojom.Perms, string, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(permissions.ObjectDesc, "GetPermissions")) |
| stub, err := m.getApp(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| vPerms, version, err := stub.GetPermissions(ctx, call) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| mPerms, err := toMojoPerms(vPerms) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| return toMojoError(err), mPerms, version, nil |
| } |
| |
| func (m *mojoImpl) AppSetPermissions(name string, mPerms mojom.Perms, version string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(permissions.ObjectDesc, "SetPermissions")) |
| stub, err := m.getApp(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| vPerms, err := toV23Perms(mPerms) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.SetPermissions(ctx, call, vPerms, version) |
| return toMojoError(err), nil |
| } |
| |
| //////////////////////////////////////// |
| // nosql.Database |
| |
| func (m *mojoImpl) DbCreate(name string, mPerms mojom.Perms) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.DatabaseDesc, "Create")) |
| stub, err := m.getDb(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| vPerms, err := toV23Perms(mPerms) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Create(ctx, call, nil, vPerms) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) DbDelete(name string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.DatabaseDesc, "Delete")) |
| stub, err := m.getDb(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Delete(ctx, call, NoSchema) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) DbExists(name string) (mojom.Error, bool, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.DatabaseDesc, "Exists")) |
| stub, err := m.getDb(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), false, nil |
| } |
| exists, err := stub.Exists(ctx, call, NoSchema) |
| return toMojoError(err), exists, nil |
| } |
| |
| func (m *mojoImpl) DbExec(name string, query string, stream mojom.ExecStream_Pointer) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbBeginBatch(name string, bo *mojom.BatchOptions) (mojom.Error, string, error) { |
| return mojom.Error{}, "", nil |
| } |
| |
| func (m *mojoImpl) DbCommit(name string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbAbort(name string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbGetPermissions(name string) (mojom.Error, mojom.Perms, string, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(permissions.ObjectDesc, "GetPermissions")) |
| stub, err := m.getDb(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| vPerms, version, err := stub.GetPermissions(ctx, call) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| mPerms, err := toMojoPerms(vPerms) |
| if err != nil { |
| return toMojoError(err), mojom.Perms{}, "", nil |
| } |
| return toMojoError(err), mPerms, version, nil |
| } |
| |
| func (m *mojoImpl) DbSetPermissions(name string, mPerms mojom.Perms, version string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(permissions.ObjectDesc, "SetPermissions")) |
| stub, err := m.getDb(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| vPerms, err := toV23Perms(mPerms) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.SetPermissions(ctx, call, vPerms, version) |
| return toMojoError(err), nil |
| } |
| |
| //////////////////////////////////////// |
| // nosql.Database:SyncGroupManager |
| |
| func (m *mojoImpl) DbGetSyncGroupNames(name string) (mojom.Error, []string, error) { |
| return mojom.Error{}, nil, nil |
| } |
| |
| func (m *mojoImpl) DbCreateSyncGroup(name, sgName string, spec mojom.SyncGroupSpec, myInfo mojom.SyncGroupMemberInfo) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbJoinSyncGroup(name, sgName string, myInfo mojom.SyncGroupMemberInfo) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbLeaveSyncGroup(name, sgName string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbDestroySyncGroup(name, sgName string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbEjectFromSyncGroup(name, sgName string, member string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbGetSyncGroupSpec(name, sgName string) (mojom.Error, mojom.SyncGroupSpec, string, error) { |
| return mojom.Error{}, mojom.SyncGroupSpec{}, "", nil |
| } |
| |
| func (m *mojoImpl) DbSetSyncGroupSpec(name, sgName string, spec mojom.SyncGroupSpec, version string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) DbGetSyncGroupMembers(name, sgName string) (mojom.Error, map[string]mojom.SyncGroupMemberInfo, error) { |
| return mojom.Error{}, nil, nil |
| } |
| |
| //////////////////////////////////////// |
| // nosql.Table |
| |
| func (m *mojoImpl) TableCreate(name string, mPerms mojom.Perms) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.TableDesc, "Create")) |
| stub, err := m.getTable(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| vPerms, err := toV23Perms(mPerms) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Create(ctx, call, NoSchema, vPerms) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) TableDelete(name string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.TableDesc, "Delete")) |
| stub, err := m.getTable(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Delete(ctx, call, NoSchema) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) TableExists(name string) (mojom.Error, bool, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.TableDesc, "Exists")) |
| stub, err := m.getTable(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), false, nil |
| } |
| exists, err := stub.Exists(ctx, call, NoSchema) |
| return toMojoError(err), exists, nil |
| } |
| |
| func (m *mojoImpl) TableDeleteRowRange(name string, start, limit []byte) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| type scanStreamImpl struct { |
| ctx *context.T |
| proxy *mojom.ScanStream_Proxy |
| } |
| |
| func (s *scanStreamImpl) Send(item interface{}) error { |
| kv, ok := item.(nosqlwire.KeyValue) |
| if !ok { |
| return verror.NewErrInternal(s.ctx) |
| } |
| |
| return s.proxy.OnKeyValue(mojom.KeyValue{ |
| Key: kv.Key, |
| Value: kv.Value, |
| }) |
| } |
| |
| func (s *scanStreamImpl) Recv(_ interface{}) error { |
| // This should never be called. |
| return verror.NewErrInternal(s.ctx) |
| } |
| |
| var _ rpc.Stream = (*scanStreamImpl)(nil) |
| |
| // TODO(nlacasse): Provide some way for the client to cancel the stream. |
| func (m *mojoImpl) TableScan(name string, start, limit []byte, ptr mojom.ScanStream_Pointer) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.TableDesc, "Scan")) |
| stub, err := m.getTable(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| |
| proxy := mojom.NewScanStreamProxy(ptr, bindings.GetAsyncWaiter()) |
| |
| tableScanServerCallStub := &nosqlwire.TableScanServerCallStub{struct { |
| rpc.Stream |
| rpc.ServerCall |
| }{ |
| &scanStreamImpl{ |
| ctx: ctx, |
| proxy: proxy, |
| }, |
| call, |
| }} |
| |
| err = stub.Scan(ctx, tableScanServerCallStub, NoSchema, start, limit) |
| |
| // NOTE(nlacasse): Since we are already streaming, we send any error back |
| // to the client on the stream. The TableScan function itself should not |
| // return an error at this point. |
| proxy.OnDone(toMojoError(err)) |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) TableGetPermissions(name, key string) (mojom.Error, []mojom.PrefixPerms, error) { |
| return mojom.Error{}, nil, nil |
| } |
| |
| func (m *mojoImpl) TableSetPermissions(name, prefix string, mPerms mojom.Perms) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| func (m *mojoImpl) TableDeletePermissions(name, prefix string) (mojom.Error, error) { |
| return mojom.Error{}, nil |
| } |
| |
| //////////////////////////////////////// |
| // nosql.Row |
| |
| func (m *mojoImpl) RowExists(name string) (mojom.Error, bool, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.RowDesc, "Exists")) |
| stub, err := m.getRow(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), false, nil |
| } |
| exists, err := stub.Exists(ctx, call, NoSchema) |
| return toMojoError(err), exists, nil |
| } |
| |
| func (m *mojoImpl) RowGet(name string) (mojom.Error, []byte, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.RowDesc, "Get")) |
| stub, err := m.getRow(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil, nil |
| } |
| value, err := stub.Get(ctx, call, NoSchema) |
| return toMojoError(err), value, nil |
| } |
| |
| func (m *mojoImpl) RowPut(name string, value []byte) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.RowDesc, "Put")) |
| stub, err := m.getRow(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Put(ctx, call, NoSchema, value) |
| return toMojoError(err), nil |
| } |
| |
| func (m *mojoImpl) RowDelete(name string) (mojom.Error, error) { |
| ctx, call := m.newCtxCall(name, methodDesc(nosqlwire.RowDesc, "Delete")) |
| stub, err := m.getRow(ctx, call, name) |
| if err != nil { |
| return toMojoError(err), nil |
| } |
| err = stub.Delete(ctx, call, NoSchema) |
| return toMojoError(err), nil |
| } |
