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- issue #32
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package wampv2 | ||
|
|
||
| type Callee interface { | ||
| ErrorHandler | ||
| // Acknowledge that the endpoint was succesfully registered | ||
| SendRegistered(*Registered) | ||
| // Acknowledge that the endpoint was succesfully unregistered | ||
| SendUnregistered(*Unregistered) | ||
| // Dealer requests fulfillment of a procedure call | ||
| SendInvocation(*Invocation) | ||
| } | ||
|
|
||
| type Caller interface { | ||
| ErrorHandler | ||
| // Dealer sends the returned result from the procedure call | ||
| SendResult(*Result) | ||
| } | ||
|
|
||
| type Dealer interface { | ||
| // Register a procedure on an endpoint | ||
| Register(Callee, *Register) | ||
| // Unregister a procedure on an endpoint | ||
| Unregister(Callee, *Unregister) | ||
| // Call a procedure on an endpoint | ||
| Call(Caller, *Call) | ||
| // Return the result of a procedure call | ||
| Yield(Callee, *Yield) | ||
| } | ||
|
|
||
| type RemoteProcedure struct { | ||
| Endpoint Callee | ||
| Procedure URI | ||
| } | ||
|
|
||
| type DefaultDealer struct { | ||
| // map registration IDs to procedures | ||
| procedures map[ID]RemoteProcedure | ||
| // map procedure URIs to registration IDs | ||
| // TODO: this will eventually need to be `map[URI][]ID` to support | ||
| // multiple callees for the same procedure | ||
| registrations map[URI]ID | ||
| // keep track of call IDs so we can send the response to the caller | ||
| calls map[ID]Caller | ||
| // link the invocation ID to the call ID | ||
| invocations map[ID]ID | ||
| } | ||
|
|
||
| func NewDefaultDealer() *DefaultDealer { | ||
| return &DefaultDealer{ | ||
| procedures: make(map[ID]RemoteProcedure), | ||
| registrations: make(map[URI]ID), | ||
| calls: make(map[ID]Caller), | ||
| invocations: make(map[ID]ID), | ||
| } | ||
| } | ||
|
|
||
| func (d *DefaultDealer) Register(callee Callee, msg *Register) { | ||
| if _, ok := d.registrations[msg.Procedure]; ok { | ||
| callee.SendError(&Error{ | ||
| Type: msg.MessageType(), | ||
| Request: msg.Request, | ||
| Error: WAMP_ERROR_PROCEDURE_ALREADY_EXISTS, | ||
| }) | ||
| return | ||
| } | ||
| reg := NewID() | ||
| d.procedures[reg] = RemoteProcedure{callee, msg.Procedure} | ||
| d.registrations[msg.Procedure] = reg | ||
| callee.SendRegistered(&Registered{ | ||
| Request: msg.Request, | ||
| Registration: reg, | ||
| }) | ||
| } | ||
|
|
||
| func (d *DefaultDealer) Unregister(callee Callee, msg *Unregister) { | ||
| if procedure, ok := d.procedures[msg.Registration]; !ok { | ||
| // the registration doesn't exist | ||
| callee.SendError(&Error{ | ||
| Type: msg.MessageType(), | ||
| Request: msg.Request, | ||
| Error: WAMP_ERROR_NO_SUCH_REGISTRATION, | ||
| }) | ||
| } else { | ||
| delete(d.registrations, procedure.Procedure) | ||
| delete(d.procedures, msg.Registration) | ||
| callee.SendUnregistered(&Unregistered{ | ||
| Request: msg.Request, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func (d *DefaultDealer) Call(caller Caller, msg *Call) { | ||
| if reg, ok := d.registrations[msg.Procedure]; !ok { | ||
| caller.SendError(&Error{ | ||
| Type: msg.MessageType(), | ||
| Request: msg.Request, | ||
| Error: WAMP_ERROR_NO_SUCH_PROCEDURE, | ||
| }) | ||
| } else { | ||
| if rproc, ok := d.procedures[reg]; !ok { | ||
| // found a registration id, but doesn't match any remote procedure | ||
| caller.SendError(&Error{ | ||
| Type: msg.MessageType(), | ||
| Request: msg.Request, | ||
| // TODO: what should this error be? | ||
| Error: URI("wamp.error.internal_error"), | ||
| }) | ||
| } else { | ||
| // everything checks out, make the invocation request | ||
| d.calls[msg.Request] = caller | ||
| invocationID := NewID() | ||
| d.invocations[invocationID] = msg.Request | ||
| rproc.Endpoint.SendInvocation(&Invocation{ | ||
| Request: invocationID, | ||
| Registration: reg, | ||
| Arguments: msg.Arguments, | ||
| ArgumentsKw: msg.ArgumentsKw, | ||
| }) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (d *DefaultDealer) Yield(callee Callee, msg *Yield) { | ||
| if callID, ok := d.invocations[msg.Request]; !ok { | ||
| callee.SendError(&Error{ | ||
| Type: msg.MessageType(), | ||
| Request: msg.Request, | ||
| // TODO: what should this error be? | ||
| Error: URI("wamp.error.no_such_invocation"), | ||
| }) | ||
| } else { | ||
| if caller, ok := d.calls[callID]; !ok { | ||
| // found the invocation id, but doesn't match any call id | ||
| callee.SendError(&Error{ | ||
| Type: msg.MessageType(), | ||
| Request: msg.Request, | ||
| // TODO: what should this error be? | ||
| Error: URI("wamp.error.no_such_call"), | ||
| }) | ||
| } else { | ||
| // return the result to the caller | ||
| caller.SendResult(&Result{ | ||
| Request: callID, | ||
| Arguments: msg.Arguments, | ||
| ArgumentsKw: msg.ArgumentsKw, | ||
| }) | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package wampv2 | ||
|
|
||
| import ( | ||
| . "github.com/smartystreets/goconvey/convey" | ||
| "testing" | ||
| ) | ||
|
|
||
| type TestCallee struct { | ||
| received Message | ||
| } | ||
|
|
||
| func (c *TestCallee) SendError(msg *Error) { c.received = msg } | ||
| func (c *TestCallee) SendRegistered(msg *Registered) { c.received = msg } | ||
| func (c *TestCallee) SendUnregistered(msg *Unregistered) { c.received = msg } | ||
| func (c *TestCallee) SendInvocation(msg *Invocation) { c.received = msg } | ||
|
|
||
| func TestRegister(t *testing.T) { | ||
| Convey("Registering a procedure", t, func() { | ||
| dealer := NewDefaultDealer() | ||
| callee := &TestCallee{} | ||
| testProcedure := URI("turnpike.test.endpoint") | ||
| msg := &Register{Request: 123, Procedure: testProcedure} | ||
| dealer.Register(callee, msg) | ||
|
|
||
| Convey("The callee should have received a REGISTERED message", func() { | ||
| reg := callee.received.(*Registered).Registration | ||
| So(reg, ShouldNotEqual, 0) | ||
| }) | ||
|
|
||
| Convey("The dealer should have the endpoint registered", func() { | ||
| reg := callee.received.(*Registered).Registration | ||
| reg2, ok := dealer.registrations[testProcedure] | ||
| So(ok, ShouldBeTrue) | ||
| So(reg, ShouldEqual, reg2) | ||
| proc, ok := dealer.procedures[reg] | ||
| So(ok, ShouldBeTrue) | ||
| So(proc.Procedure, ShouldEqual, testProcedure) | ||
| }) | ||
|
|
||
| Convey("The same procedure cannot be registered more than once", func() { | ||
| msg := &Register{Request: 321, Procedure: testProcedure} | ||
| dealer.Register(callee, msg) | ||
| So(callee.received, ShouldHaveSameTypeAs, &Error{}) | ||
| }) | ||
| }) | ||
| } |
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