1 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3 ;;; Confidential and proprietary information of ITA Software, Inc. ;;;
5 ;;; Copyright (c) 2012 ITA Software, Inc. All rights reserved. ;;;
7 ;;; Original author: Scott McKay ;;;
9 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
11 (in-package "PROTO-IMPL")
14 ;;; Protocol buffer defining macros
16 ;; Define a schema named 'type', corresponding to a .proto file of that name
17 (defmacro define-schema (type (&key name syntax package lisp-package import optimize
18 options documentation)
19 &body messages &environment env)
20 "Define a schema named 'type', corresponding to a .proto file of that name.
21 'name' can be used to override the defaultly generated Protobufs name.
22 'syntax' and 'package' are as they would be in a .proto file.
23 'lisp-package' can be used to specify a Lisp package if it is different from
24 the Protobufs package given by 'package'.
25 'import' is a list of pathname strings to be imported.
26 'optimize' can be either :space (the default) or :speed; if it is :speed, the
27 serialization code will be much faster, but much less compact.
28 'options' is a property list, i.e., (\"key1\" \"val1\" \"key2\" \"val2\" ...).
30 The body consists of 'define-enum', 'define-message' or 'define-service' forms."
31 (let* ((name (or name (class-name->proto type)))
32 (package (and package (if (stringp package) package (string-downcase (string package)))))
33 (lisp-pkg (and lisp-package (if (stringp lisp-package) lisp-package (string lisp-package))))
34 (options (loop for (key val) on options by #'cddr
35 collect (make-instance 'protobuf-option
36 :name (if (symbolp key) (slot-name->proto key) key)
38 (imports (if (listp import) import (list import)))
39 (schema (make-instance 'protobuf-schema
42 :syntax (or syntax "proto2")
44 :lisp-package (or lisp-pkg package)
47 (append options (list (make-instance 'protobuf-option
49 :value (if (eq optimize :speed) "SPEED" "CODE_SIZE")
52 :documentation documentation))
54 (*protobuf-package* (or (find-package lisp-pkg)
55 (find-package (string-upcase lisp-pkg))
57 (apply #'process-imports schema imports)
58 (with-collectors ((forms collect-form))
59 (dolist (msg messages)
60 (assert (and (listp msg)
61 (member (car msg) '(define-enum define-message define-extend define-service))) ()
62 "The body of ~S must be one of ~{~S~^ or ~}"
63 'define-schema '(define-enum define-message define-extend define-service))
64 ;; The macro-expander will return a form that consists
65 ;; of 'progn' followed by a symbol naming what we've expanded
66 ;; (define-enum, define-message, define-extend, define-service),
67 ;; followed by the Lisp model object created by the defining form,
68 ;; followed by other defining forms (e.g., deftype, defclass)
69 (destructuring-bind (&optional progn model-type model definers)
70 (macroexpand-1 msg env)
71 (assert (eq progn 'progn) ()
72 "The macroexpansion for ~S failed" msg)
73 (map () #'collect-form definers)
76 (setf (proto-enums schema) (nconc (proto-enums schema) (list model))))
77 ((define-message define-extend)
78 (setf (proto-parent model) schema)
79 (setf (proto-messages schema) (nconc (proto-messages schema) (list model)))
80 (when (eq (proto-message-type model) :extends)
81 (setf (proto-extenders schema) (nconc (proto-extenders schema) (list model)))))
83 (setf (proto-services schema) (nconc (proto-services schema) (list model)))))))
84 (let ((var (intern (format nil "*~A*" type) *protobuf-package*)))
88 (let* ((old-schema ,var)
91 (multiple-value-bind (upgradable warnings)
92 (schema-upgradable old-schema new-schema)
94 (protobufs-warn "The old schema for ~S (~A) can't be safely upgraded; proceeding anyway"
96 (map () #'protobufs-warn warnings))))
97 (setq ,var new-schema)
98 (record-protobuf ,var)
99 ,@(with-collectors ((messages collect-message))
100 (labels ((collect-messages (message)
101 (collect-message message)
102 (map () #'collect-messages (proto-messages message))))
103 (map () #'collect-messages (proto-messages schema)))
105 (mapcar #'(lambda (m) `(record-protobuf ,m)) messages)
106 (when (eq optimize :speed)
107 (append (mapcar #'generate-object-size messages)
108 (mapcar #'generate-serializer messages)
109 (mapcar #'generate-deserializer messages)))))
112 ;; Define an enum type named 'type' and a Lisp 'deftype'
113 (defmacro define-enum (type (&key name conc-name alias-for options documentation)
115 "Define a Protobufs enum type and a Lisp 'deftype' named 'type'.
116 'name' can be used to override the defaultly generated Protobufs enum name.
117 'conc-name' will be used as the prefix to the Lisp enum names, if it's supplied.
118 If 'alias-for' is given, no Lisp 'deftype' will be defined. Instead, the enum
119 will be used as an alias for an enum type that already exists in Lisp.
120 'options' is a set of keyword/value pairs, both of which are strings.
122 The body consists of the enum values in the form 'name' or (name index)."
123 (let* ((name (or name (class-name->proto type)))
124 (options (loop for (key val) on options by #'cddr
125 collect (make-instance 'protobuf-option
126 :name (if (symbolp key) (slot-name->proto key) key)
129 (enum (make-instance 'protobuf-enum
134 :documentation documentation)))
135 (with-collectors ((vals collect-val)
136 (forms collect-form))
138 (let* ((idx (if (listp val) (second val) (incf index)))
139 (name (if (listp val) (first val) val))
140 (val-name (kintern (if conc-name (format nil "~A~A" conc-name name) (symbol-name name))))
141 (enum-name (if conc-name (format nil "~A~A" conc-name name) (symbol-name name)))
142 (enum-val (make-instance 'protobuf-enum-value
143 :name (enum-name->proto enum-name)
146 (collect-val val-name)
147 (setf (proto-values enum) (nconc (proto-values enum) (list enum-val)))))
149 ;; If we've got an alias, define a a type that is the subtype of
150 ;; the Lisp enum so that typep and subtypep work
151 (unless (eq type alias-for)
152 (collect-form `(deftype ,type () ',alias-for)))
153 ;; If no alias, define the Lisp enum type now
154 (collect-form `(deftype ,type () '(member ,@vals))))
160 ;; Define a message named 'name' and a Lisp 'defclass'
161 (defmacro define-message (type (&key name conc-name alias-for options documentation)
162 &body fields &environment env)
163 "Define a message named 'type' and a Lisp 'defclass'.
164 'name' can be used to override the defaultly generated Protobufs message name.
165 The body consists of fields, or 'define-enum' or 'define-message' forms.
166 'conc-name' will be used as the prefix to the Lisp slot accessors, if it's supplied.
167 If 'alias-for' is given, no Lisp class is defined. Instead, the message will be
168 used as an alias for a class that already exists in Lisp. This feature is intended
169 to be used to define messages that will be serialized from existing Lisp classes;
170 unless you get the slot names or readers exactly right for each field, it will be
171 the case that trying to (de)serialize into a Lisp object won't work.
172 'options' is a set of keyword/value pairs, both of which are strings.
174 Fields take the form (slot &key type name default reader)
175 'slot' can be either a symbol giving the field name, or a list whose
176 first element is the slot name and whose second element is the index.
177 'type' is the type of the slot.
178 'name' can be used to override the defaultly generated Protobufs field name.
179 'default' is the default value for the slot.
180 'reader' is a Lisp slot reader function to use to get the value, instead of
181 using 'slot-value'; this is often used when aliasing an existing class.
182 'writer' is a Lisp slot writer function to use to set the value."
183 (let* ((name (or name (class-name->proto type)))
184 (options (loop for (key val) on options by #'cddr
185 collect (make-instance 'protobuf-option
186 :name (if (symbolp key) (slot-name->proto key) key)
188 (message (make-instance 'protobuf-message
193 :conc-name (and conc-name (string conc-name))
195 :documentation documentation))
197 (*protobuf* message))
198 (with-collectors ((slots collect-slot)
199 (forms collect-form))
200 (dolist (field fields)
202 ((define-enum define-message define-extend define-extension define-group)
203 (destructuring-bind (&optional progn model-type model definers extra-field extra-slot)
204 (macroexpand-1 field env)
205 (assert (eq progn 'progn) ()
206 "The macroexpansion for ~S failed" field)
207 (map () #'collect-form definers)
210 (setf (proto-enums message) (nconc (proto-enums message) (list model))))
211 ((define-message define-extend)
212 (setf (proto-parent model) message)
213 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
214 (when (eq (proto-message-type model) :extends)
215 (setf (proto-extenders message) (nconc (proto-extenders message) (list model)))))
217 (setf (proto-parent model) message)
218 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
220 (collect-slot extra-slot))
221 (setf (proto-fields message) (nconc (proto-fields message) (list extra-field))))
223 (setf (proto-extensions message) (nconc (proto-extensions message) (list model)))))))
225 (multiple-value-bind (field slot idx)
226 (process-field field index :conc-name conc-name :alias-for alias-for)
227 (assert (not (find (proto-index field) (proto-fields message) :key #'proto-index)) ()
228 "The field ~S overlaps with another field in ~S"
229 (proto-value field) (proto-class message))
233 (setf (proto-fields message) (nconc (proto-fields message) (list field)))))))
235 ;; If we've got an alias, define a a type that is the subtype of
236 ;; the Lisp class that typep and subtypep work
237 (unless (or (eq type alias-for) (find-class type nil))
238 (collect-form `(deftype ,type () ',alias-for)))
239 ;; If no alias, define the class now
240 (collect-form `(defclass ,type () (,@slots)
241 ,@(and documentation `((:documentation ,documentation))))))
247 (defmacro define-extension (from to)
248 "Define an extension range within a message.
249 The \"body\" is the start and end of the range, both inclusive."
252 ,(make-instance 'protobuf-extension
254 :to (if (eq to 'max) #.(1- (ash 1 29)) to))
257 (defmacro define-extend (type (&key name options documentation)
258 &body fields &environment env)
259 "Define an extension to the message named 'type'.
260 'name' can be used to override the defaultly generated Protobufs message name.
261 The body consists only of fields.
262 'options' is a set of keyword/value pairs, both of which are strings.
264 Fields take the form (slot &key type name default reader)
265 'slot' can be either a symbol giving the field name, or a list whose
266 first element is the slot name and whose second element is the index.
267 'type' is the type of the slot.
268 'name' can be used to override the defaultly generated Protobufs field name.
269 'default' is the default value for the slot.
270 'reader' is a Lisp slot reader function to use to get the value, instead of
271 using 'slot-value'; this is often used when aliasing an existing class.
272 'writer' is a Lisp slot writer function to use to set the value."
273 (let* ((name (or name (class-name->proto type)))
274 (options (loop for (key val) on options by #'cddr
275 collect (make-instance 'protobuf-option
276 :name (if (symbolp key) (slot-name->proto key) key)
278 (message (find-message *protobuf* name))
279 (conc-name (and message (proto-conc-name message)))
280 (alias-for (and message (proto-alias-for message)))
281 (extends (and message
282 (make-instance 'protobuf-message
285 :parent (proto-parent message)
288 :enums (copy-list (proto-enums message))
289 :messages (copy-list (proto-messages message))
290 :fields (copy-list (proto-fields message))
291 :options (or options (copy-list (proto-options message)))
292 :extensions (copy-list (proto-extensions message))
293 :message-type :extends ;this message is an extension
294 :documentation documentation)))
298 "There is no message named ~A to extend" name)
299 (assert (eq type (proto-class message)) ()
300 "The type ~S doesn't match the type of the message being extended ~S"
302 (with-collectors ((forms collect-form))
303 (dolist (field fields)
304 (assert (not (member (car field)
305 '(define-enum define-message define-extend define-extension))) ()
306 "The body of ~S can only contain field and group definitions" 'define-extend)
309 (destructuring-bind (&optional progn model-type model definers extra-field extra-slot)
310 (macroexpand-1 field env)
311 (assert (eq progn 'progn) ()
312 "The macroexpansion for ~S failed" field)
313 (map () #'collect-form definers)
316 (setf (proto-parent model) extends)
317 (setf (proto-messages extends) (nconc (proto-messages extends) (list model)))
319 ;;--- Fix all this duplicated code!
320 (let* ((inits (cdr extra-slot))
321 (sname (car extra-slot))
322 (stable (fintern "~A-VALUES" sname))
323 (stype (getf inits :type))
324 (reader (or (getf inits :accessor)
326 (intern (if conc-name (format nil "~A~A" conc-name sname) (symbol-name sname))
327 *protobuf-package*)))
328 (writer (or (getf inits :writer)
329 (intern (format nil "~A-~A" reader 'setter)
330 *protobuf-package*)))
331 (default (getf inits :initform)))
332 (collect-form `(without-redefinition-warnings ()
333 (let ((,stable (make-hash-table :test #'eq :weak t)))
334 ,@(and reader `((defmethod ,reader ((object ,type))
335 (gethash object ,stable ,default))))
336 ,@(and writer `((defmethod ,writer ((object ,type) value)
337 (declare (type ,stype value))
338 (setf (gethash object ,stable) value))))
339 ;; For Python compatibility
340 (defmethod get-extension ((object ,type) (slot (eql ',sname)))
341 (values (gethash object ,stable ,default)))
342 (defmethod set-extension ((object ,type) (slot (eql ',sname)) value)
343 (setf (gethash object ,stable) value))
344 (defmethod has-extension ((object ,type) (slot (eql ',sname)))
345 (multiple-value-bind (value foundp)
346 (gethash object ,stable ,default)
347 (declare (ignore value))
349 (defmethod clear-extension ((object ,type) (slot (eql ',sname)))
350 (remhash object ,stable))
351 ,@(and writer `((defsetf ,reader ,writer))))))))
352 (setf (proto-message-type extra-field) :extends) ;this field is an extension
353 (setf (proto-fields extends) (nconc (proto-fields extends) (list extra-field)))
354 (setf (proto-extended-fields extends) (nconc (proto-extended-fields extends) (list extra-field)))))))
356 (multiple-value-bind (field slot idx)
357 (process-field field index :conc-name conc-name :alias-for alias-for)
358 (assert (not (find (proto-index field) (proto-fields extends) :key #'proto-index)) ()
359 "The field ~S overlaps with another field in ~S"
360 (proto-value field) (proto-class extends))
361 (assert (index-within-extensions-p idx message) ()
362 "The index ~D is not in range for extending ~S"
363 idx (proto-class message))
366 (let* ((inits (cdr slot))
368 (stable (fintern "~A-VALUES" sname))
369 (stype (getf inits :type))
370 (reader (or (getf inits :accessor)
372 (intern (if conc-name (format nil "~A~A" conc-name sname) (symbol-name sname))
373 *protobuf-package*)))
374 (writer (or (getf inits :writer)
375 (intern (format nil "~A-~A" reader 'setter)
376 *protobuf-package*)))
377 (default (getf inits :initform)))
378 ;; For the extended slots, each slot gets its own table
379 ;; keyed by the object, which lets us avoid having a slot in each
380 ;; instance that holds a table keyed by the slot name
381 ;; Multiple 'define-extends' on the same class in the same image
382 ;; will result in harmless redefinitions, so squelch the warnings
383 ;;--- Maybe these methods need to be defined in 'define-message'?
384 (collect-form `(without-redefinition-warnings ()
385 (let ((,stable (make-hash-table :test #'eq :weak t)))
386 ,@(and reader `((defmethod ,reader ((object ,type))
387 (gethash object ,stable ,default))))
388 ,@(and writer `((defmethod ,writer ((object ,type) value)
389 (declare (type ,stype value))
390 (setf (gethash object ,stable) value))))
391 ;; For Python compatibility
392 (defmethod get-extension ((object ,type) (slot (eql ',sname)))
393 (values (gethash object ,stable ,default)))
394 (defmethod set-extension ((object ,type) (slot (eql ',sname)) value)
395 (setf (gethash object ,stable) value))
396 (defmethod has-extension ((object ,type) (slot (eql ',sname)))
397 (multiple-value-bind (value foundp)
398 (gethash object ,stable ,default)
399 (declare (ignore value))
401 (defmethod clear-extension ((object ,type) (slot (eql ',sname)))
402 (remhash object ,stable))
403 ,@(and writer `((defsetf ,reader ,writer))))))
404 ;; This so that (de)serialization works
405 (setf (proto-reader field) reader
406 (proto-writer field) writer)))
407 (setf (proto-message-type field) :extends) ;this field is an extension
408 (setf (proto-fields extends) (nconc (proto-fields extends) (list field)))
409 (setf (proto-extended-fields extends) (nconc (proto-extended-fields extends) (list field)))))))
415 (defun index-within-extensions-p (index message)
416 (let ((extensions (proto-extensions message)))
417 (some #'(lambda (ext)
418 (and (i>= index (proto-extension-from ext))
419 (i<= index (proto-extension-to ext))))
422 (defmacro define-group (type (&key index arity name conc-name alias-for options documentation)
423 &body fields &environment env)
424 "Define a message named 'type' and a Lisp 'defclass', *and* a field named type.
425 This is deprecated in Protobufs, but if you have to use it, you must give
426 'index' as the field index and 'arity' of :required, :optional or :repeated.
427 'name' can be used to override the defaultly generated Protobufs message name.
428 The body consists of fields, or 'define-enum' or 'define-message' forms.
429 'conc-name' will be used as the prefix to the Lisp slot accessors, if it's supplied.
430 If 'alias-for' is given, no Lisp class is defined. Instead, the message will be
431 used as an alias for a class that already exists in Lisp. This feature is intended
432 to be used to define messages that will be serialized from existing Lisp classes;
433 unless you get the slot names or readers exactly right for each field, it will be
434 the case that trying to (de)serialize into a Lisp object won't work.
435 'options' is a set of keyword/value pairs, both of which are strings.
437 Fields take the form (slot &key type name default reader)
438 'slot' can be either a symbol giving the field name, or a list whose
439 first element is the slot name and whose second element is the index.
440 'type' is the type of the slot.
441 'name' can be used to override the defaultly generated Protobufs field name.
442 'default' is the default value for the slot.
443 'reader' is a Lisp slot reader function to use to get the value, instead of
444 using 'slot-value'; this is often used when aliasing an existing class.
445 'writer' is a Lisp slot writer function to use to set the value."
446 (check-type index integer)
447 (check-type arity (member :required :optional :repeated))
448 (let* ((slot (or (and name (proto->slot-name name *protobuf-package*)) type))
449 (name (or name (class-name->proto type)))
450 (options (loop for (key val) on options by #'cddr
451 collect (make-instance 'protobuf-option
452 :name (if (symbolp key) (slot-name->proto key) key)
454 (mslot (unless alias-for
455 `(,slot ,@(case arity
459 `(:type (or ,type null)
462 `(:type (list-of ,type)
464 :initarg ,(kintern (symbol-name slot)))))
465 (mfield (make-instance 'protobuf-field
466 :name (slot-name->proto slot)
470 ;; One of :required, :optional or :repeated
473 :message-type :group))
474 (message (make-instance 'protobuf-message
478 :conc-name (and conc-name (string conc-name))
480 :message-type :group ;this message is a group
481 :documentation documentation))
483 (*protobuf* message))
484 (with-collectors ((slots collect-slot)
485 (forms collect-form))
486 (dolist (field fields)
488 ((define-enum define-message define-extend define-extension define-group)
489 (destructuring-bind (&optional progn model-type model definers extra-field extra-slot)
490 (macroexpand-1 field env)
491 (assert (eq progn 'progn) ()
492 "The macroexpansion for ~S failed" field)
493 (map () #'collect-form definers)
496 (setf (proto-enums message) (nconc (proto-enums message) (list model))))
497 ((define-message define-extend)
498 (setf (proto-parent model) message)
499 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
500 (when (eq (proto-message-type model) :extends)
501 (setf (proto-extenders message) (nconc (proto-extenders message) (list model)))))
503 (setf (proto-parent model) message)
504 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
506 (collect-slot extra-slot))
507 (setf (proto-fields message) (nconc (proto-fields message) (list extra-field))))
509 (setf (proto-extensions message) (nconc (proto-extensions message) (list model)))))))
511 (multiple-value-bind (field slot idx)
512 (process-field field index :conc-name conc-name :alias-for alias-for)
513 (assert (not (find (proto-index field) (proto-fields message) :key #'proto-index)) ()
514 "The field ~S overlaps with another field in ~S"
515 (proto-value field) (proto-class message))
519 (setf (proto-fields message) (nconc (proto-fields message) (list field)))))))
521 ;; If we've got an alias, define a a type that is the subtype of
522 ;; the Lisp class that typep and subtypep work
523 (unless (or (eq type alias-for) (find-class type nil))
524 (collect-form `(deftype ,type () ',alias-for)))
525 ;; If no alias, define the class now
526 (collect-form `(defclass ,type () (,@slots)
527 ,@(and documentation `((:documentation ,documentation))))))
535 (defun process-field (field index &key conc-name alias-for)
536 "Process one field descriptor within 'define-message' or 'define-extend'.
537 Returns a 'proto-field' object, a CLOS slot form and the incremented field index."
538 (when (i= index 18999) ;skip over the restricted range
540 (destructuring-bind (slot &rest other-options
541 &key type reader writer name (default nil default-p) packed
542 options documentation &allow-other-keys) field
543 (let* ((idx (if (listp slot) (second slot) (iincf index)))
544 (slot (if (listp slot) (first slot) slot))
545 (reqd (clos-type-to-protobuf-required type))
546 (reader (if (eq reader 't)
547 (intern (if conc-name (format nil "~A~A" conc-name slot) (symbol-name slot))
551 (loop for (key val) on other-options by #'cddr
552 unless (member key '(:type :reader :writer :name :default :packed :documentation))
553 collect (make-instance 'protobuf-option
554 :name (slot-name->proto key)
556 (loop for (key val) on options by #'cddr
557 collect (make-instance 'protobuf-option
558 :name (if (symbolp key) (slot-name->proto key) key)
560 (multiple-value-bind (ptype pclass)
561 (clos-type-to-protobuf-type type)
562 (let ((slot (unless alias-for
567 `(:accessor ,reader)))
570 :initarg ,(kintern (symbol-name slot))
571 ,@(cond ((and (not default-p)
574 ((and (not default-p)
576 ;; Use unbound for booleans only
577 (not (eq pclass :bool)))
580 `(:initform ,(protobuf-default-to-clos-init default type)))))))
581 (field (make-instance 'protobuf-field
582 :name (or name (slot-name->proto slot))
591 ;; Pack the field only if requested and it actually makes sense
592 :packed (and (eq reqd :repeated) packed t)
594 :documentation documentation)))
595 (values field slot idx))))))
597 ;; Define a service named 'type' with generic functions declared for
598 ;; each of the methods within the service
599 (defmacro define-service (type (&key name options documentation)
601 "Define a service named 'type' and Lisp 'defgeneric' for all its methods.
602 'name' can be used to override the defaultly generated Protobufs service name.
603 'options' is a set of keyword/value pairs, both of which are strings.
605 The body is a set of method specs of the form (name (input-type output-type) &key options).
606 'input-type' and 'output-type' may also be of the form (type &key name)."
607 (let* ((name (or name (class-name->proto type)))
608 (options (loop for (key val) on options by #'cddr
609 collect (make-instance 'protobuf-option
610 :name (if (symbolp key) (slot-name->proto key) key)
612 (service (make-instance 'protobuf-service
616 :documentation documentation)))
617 (with-collectors ((forms collect-form))
618 (dolist (method method-specs)
619 (destructuring-bind (function (input-type output-type) &key name options documentation) method
620 (let* ((input-name (and (listp input-type)
621 (getf (cdr input-type) :name)))
622 (input-type (if (listp input-type) (car input-type) input-type))
623 (output-name (and (listp output-type)
624 (getf (cdr output-type) :name)))
625 (output-type (if (listp output-type) (car output-type) output-type))
626 (options (loop for (key val) on options by #'cddr
627 collect (make-instance 'protobuf-option
628 :name (if (symbolp key) (slot-name->proto key) key)
630 (method (make-instance 'protobuf-method
632 :name (or name (class-name->proto function))
633 :input-type input-type
634 :input-name (or input-name (class-name->proto input-type))
635 :output-type output-type
636 :output-name (or output-name (class-name->proto output-type))
638 :documentation documentation)))
639 (setf (proto-methods service) (nconc (proto-methods service) (list method)))
640 ;; The following are the hooks to CL-Stubby
641 (let* ((package *protobuf-package*)
643 (server-fn (intern (format nil "~A-~A" 'do function) package))
644 (vinput (intern (format nil "~A-~A" (symbol-name input-type) 'in) package))
645 (voutput (intern (format nil "~A-~A" (symbol-name output-type) 'out) package))
646 (vchannel (intern (symbol-name 'channel) package))
647 (vcallback (intern (symbol-name 'callback) package)))
648 ;; The client side stub, e.g., 'read-air-reservation'.
649 ;; The expectation is that CL-Stubby will provide macrology to make it
650 ;; easy to implement a method for this on each kind of channel (HTTP, TCP socket,
651 ;; IPC, etc). Unlike C++/Java/Python, we don't need a client-side subclass,
652 ;; because we can just use multi-methods.
653 ;; The CL-Stubby macros take care of serializing the input, transmitting the
654 ;; request over the wire, waiting for input (or not if it's asynchronous),
655 ;; filling in the output, and calling the callback (if it's synchronous).
656 ;; It's not very Lispy to side-effect an output object, but it makes
657 ;; asynchronous calls simpler.
658 (collect-form `(defgeneric ,client-fn (,vchannel ,vinput ,voutput &key ,vcallback)
659 ,@(and documentation `((:documentation ,documentation)))
660 (declare (values ,output-type))))
661 ;; The server side stub, e.g., 'do-read-air-reservation'.
662 ;; The expectation is that the server-side program will implement
663 ;; a method with the business logic for this on each kind of channel
664 ;; (HTTP, TCP socket, IPC, etc), possibly on a server-side subclass
665 ;; of the input class
666 ;; The business logic is expected to perform the correct operations on
667 ;; the input object, which arrived via Protobufs, and produce an output
668 ;; of the given type, which will be serialized as a result.
669 ;; The channel objects hold client identity information, deadline info,
670 ;; etc, and can be side-effected to indicate success or failure
671 ;; CL-Stubby provides the channel classes and does (de)serialization, etc
672 (collect-form `(defgeneric ,server-fn (,vchannel ,vinput ,voutput &key ,vcallback)
673 ,@(and documentation `((:documentation ,documentation)))
674 (declare (values ,output-type))))))))
681 ;;; Ensure everything in a Protobufs schema is defined
683 (defvar *undefined-messages*)
685 ;; A very useful tool during development...
686 (defun ensure-all-schemas ()
689 (loop for p being the hash-values of *all-schemas*
691 #'string< :key #'proto-name)))
692 (mapcan #'ensure-schema protos)))
694 (defmethod ensure-schema ((schema protobuf-schema))
695 "Ensure that all of the types are defined in the Protobufs schema 'schema'.
696 This returns two values:
697 - A list whose elements are (<undefined-type> \"message:field\" ...)
698 - The accumulated warnings table that has the same information as objects."
699 (let ((*undefined-messages* (make-hash-table))
700 (trace (list schema)))
701 (map () (curry #'ensure-message trace) (proto-messages schema))
702 (map () (curry #'ensure-service trace) (proto-services schema))
703 (loop for type being the hash-keys of *undefined-messages*
704 using (hash-value things)
706 (mapcar #'(lambda (thing)
707 (format nil "~A:~A" (proto-name (car thing)) (proto-name (cdr thing))))
708 things)) into warnings
709 finally (return (values warnings *undefined-messages*)))))
711 (defmethod ensure-message (trace (message protobuf-message))
712 (let ((trace (cons message trace)))
713 (map () (curry #'ensure-message trace) (proto-messages message))
714 (map () (curry #'ensure-field trace message) (proto-fields message))))
716 (defmethod ensure-field (trace message (field protobuf-field))
717 (ensure-type trace message field (proto-class field)))
719 (defmethod ensure-service (trace (service protobuf-service))
720 (map () (curry #'ensure-method trace service) (proto-methods service)))
722 (defmethod ensure-method (trace service (method protobuf-method))
723 (ensure-type trace service method (proto-input-type method))
724 (ensure-type trace service method (proto-output-type method)))
726 ;; 'message' and 'field' can be a message and a field or a service and a method
727 (defun ensure-type (trace message field type)
728 (unless (keywordp type)
729 (let ((msg (loop for p in trace
730 thereis (or (find-message p type)
731 (find-enum p type)))))
733 (push (cons message field) (gethash type *undefined-messages*))))))