1 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3 ;;; Free Software published under an MIT-like license. See LICENSE ;;;
5 ;;; Copyright (c) 2012 Google, 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 (remove-options
35 (loop for (key val) on options by #'cddr
36 collect (make-instance 'protobuf-option
37 :name (if (symbolp key) (slot-name->proto key) key)
39 "optimize_for" "lisp_package"))
40 (imports (if (listp import) import (list import)))
41 (schema (make-instance 'protobuf-schema
44 :syntax (or syntax "proto2")
46 :lisp-package (or lisp-pkg (substitute #\- #\_ package))
49 (append options (list (make-instance 'protobuf-option
51 :value (if (eq optimize :speed) "SPEED" "CODE_SIZE")
54 :documentation documentation))
56 (*protobuf-package* (or (find-proto-package lisp-pkg) *package*)))
57 (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 (defmacro with-proto-source-location ((type name definition-type
113 &optional pathname start-pos end-pos)
115 "Establish a context which causes the generated Lisp code to have
116 source location information that points to the .proto file.
117 'type' is the name of the Lisp definition (a symbol).
118 'name' is the name of the Protobufs definition (a string).
119 'definition-type' is the kind of definition, e.g., 'protobuf-enum'.
120 'pathname', 'start-pos' and 'end-pos' give the location of the definition
123 (record-proto-source-location ',type ,name ',definition-type
124 ,pathname ,start-pos ,end-pos)
128 (defun record-proto-source-location (type name definition-type
129 &optional pathname start-pos end-pos)
130 (declare (ignore name))
131 (when (and ccl::*record-source-file*
132 (typep pathname '(or string pathname)))
133 (let ((ccl::*loading-toplevel-location* (ccl::make-source-note :filename pathname
136 (ccl:record-source-file type definition-type))))
139 (defun record-proto-source-location (type name definition-type
140 &optional pathname start-pos end-pos)
141 (declare (ignorable name type definition-type pathname start-pos end-pos)))
143 ;; Define an enum type named 'type' and a Lisp 'deftype'
144 (defmacro define-enum (type (&key name conc-name alias-for options
145 documentation source-location)
147 "Define a Protobufs enum type and a Lisp 'deftype' named 'type'.
148 'name' can be used to override the defaultly generated Protobufs enum name.
149 'conc-name' will be used as the prefix to the Lisp enum names, if it's supplied.
150 If 'alias-for' is given, no Lisp 'deftype' will be defined. Instead, the enum
151 will be used as an alias for an enum type that already exists in Lisp.
152 'options' is a set of keyword/value pairs, both of which are strings.
154 The body consists of the enum values in the form 'name' or (name index)."
155 (let* ((name (or name (class-name->proto type)))
156 (options (loop for (key val) on options by #'cddr
157 collect (make-instance 'protobuf-option
158 :name (if (symbolp key) (slot-name->proto key) key)
160 (conc-name (conc-name-for-type type conc-name))
162 (enum (make-instance 'protobuf-enum
165 :qualified-name (make-qualified-name *protobuf* name)
169 :documentation documentation
170 :source-location source-location)))
171 (with-collectors ((vals collect-val)
172 (forms collect-form))
174 (let* ((idx (if (listp val) (second val) (incf index)))
175 (name (if (listp val) (first val) val))
176 (val-name (kintern (if conc-name (format nil "~A~A" conc-name name) (symbol-name name))))
177 (enum-name (if conc-name (format nil "~A~A" conc-name name) (symbol-name name)))
178 (enum-val (make-instance 'protobuf-enum-value
179 :name (enum-name->proto enum-name)
183 (collect-val val-name)
184 (setf (proto-values enum) (nconc (proto-values enum) (list enum-val)))))
186 ;; If we've got an alias, define a a type that is the subtype of
187 ;; the Lisp enum so that typep and subtypep work
188 (unless (eq type alias-for)
189 (collect-form `(deftype ,type () ',alias-for)))
190 ;; If no alias, define the Lisp enum type now
191 (collect-form `(deftype ,type () '(member ,@vals))))
195 ((with-proto-source-location (,type ,name protobuf-enum ,@source-location)
198 ;; Define a message named 'name' and a Lisp 'defclass'
199 (defmacro define-message (type (&key name conc-name alias-for options
200 documentation source-location)
201 &body fields &environment env)
202 "Define a message named 'type' and a Lisp 'defclass'.
203 'name' can be used to override the defaultly generated Protobufs message name.
204 The body consists of fields, or 'define-enum' or 'define-message' forms.
205 'conc-name' will be used as the prefix to the Lisp slot accessors, if it's supplied.
206 If 'alias-for' is given, no Lisp class is defined. Instead, the message will be
207 used as an alias for a class that already exists in Lisp. This feature is intended
208 to be used to define messages that will be serialized from existing Lisp classes;
209 unless you get the slot names or readers exactly right for each field, it will be
210 the case that trying to (de)serialize into a Lisp object won't work.
211 'options' is a set of keyword/value pairs, both of which are strings.
213 Fields take the form (slot &key type name default reader)
214 'slot' can be either a symbol giving the field name, or a list whose
215 first element is the slot name and whose second element is the index.
216 'type' is the type of the slot.
217 'name' can be used to override the defaultly generated Protobufs field name.
218 'default' is the default value for the slot.
219 'reader' is a Lisp slot reader function to use to get the value, instead of
220 using 'slot-value'; this is often used when aliasing an existing class.
221 'writer' is a Lisp slot writer function to use to set the value."
222 (let* ((name (or name (class-name->proto type)))
223 (options (loop for (key val) on options by #'cddr
224 collect (make-instance 'protobuf-option
225 :name (if (symbolp key) (slot-name->proto key) key)
227 (conc-name (conc-name-for-type type conc-name))
228 (message (make-instance 'protobuf-message
231 :qualified-name (make-qualified-name *protobuf* name)
235 :options (remove-options options "default" "packed")
236 :documentation documentation
237 :source-location source-location))
239 ;; Only now can we bind *protobuf* to the new message
240 (*protobuf* message))
241 (with-collectors ((slots collect-slot)
242 (forms collect-form))
243 (dolist (field fields)
245 ((define-enum define-message define-extend define-extension define-group)
246 (destructuring-bind (&optional progn model-type model definers extra-field extra-slot)
247 (macroexpand-1 field env)
248 (assert (eq progn 'progn) ()
249 "The macroexpansion for ~S failed" field)
250 (map () #'collect-form definers)
253 (setf (proto-enums message) (nconc (proto-enums message) (list model))))
254 ((define-message define-extend)
255 (setf (proto-parent model) message)
256 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
257 (when (eq (proto-message-type model) :extends)
258 (setf (proto-extenders message) (nconc (proto-extenders message) (list model)))))
260 (setf (proto-parent model) message)
261 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
263 (collect-slot extra-slot))
264 (setf (proto-fields message) (nconc (proto-fields message) (list extra-field))))
266 (setf (proto-extensions message) (nconc (proto-extensions message) (list model)))))))
268 (multiple-value-bind (field slot idx)
269 (process-field field index :conc-name conc-name :alias-for alias-for)
270 (assert (not (find-field message (proto-index field))) ()
271 "The field ~S overlaps with another field in ~S"
272 (proto-value field) (proto-class message))
276 (setf (proto-fields message) (nconc (proto-fields message) (list field)))))))
278 ;; If we've got an alias, define a a type that is the subtype of
279 ;; the Lisp class that typep and subtypep work
280 (unless (or (eq type alias-for) (find-class type nil))
281 (collect-form `(deftype ,type () ',alias-for)))
282 ;; If no alias, define the class now
283 (collect-form `(defclass ,type () (,@slots)
284 ,@(and documentation `((:documentation ,documentation))))))
288 ((with-proto-source-location (,type ,name protobuf-message ,@source-location)
291 (defun conc-name-for-type (type conc-name)
294 ((member t) (format nil "~A-" type))
295 ((or string symbol) (string conc-name))
298 (defmacro define-extension (from to)
299 "Define an extension range within a message.
300 The \"body\" is the start and end of the range, both inclusive."
301 (let ((to (etypecase to
303 (symbol (if (string-equal to "MAX") #.(1- (ash 1 29)) to)))))
306 ,(make-instance 'protobuf-extension
308 :to (if (eq to 'max) #.(1- (ash 1 29)) to))
311 (defmacro define-extend (type (&key name conc-name options documentation)
312 &body fields &environment env)
313 "Define an extension to the message named 'type'.
314 'name' can be used to override the defaultly generated Protobufs message name.
315 The body consists only of fields.
316 'options' is a set of keyword/value pairs, both of which are strings.
318 Fields take the form (slot &key type name default reader)
319 'slot' can be either a symbol giving the field name, or a list whose
320 first element is the slot name and whose second element is the index.
321 'type' is the type of the slot.
322 'name' can be used to override the defaultly generated Protobufs field name.
323 'default' is the default value for the slot.
324 'reader' is a Lisp slot reader function to use to get the value, instead of
325 using 'slot-value'; this is often used when aliasing an existing class.
326 'writer' is a Lisp slot writer function to use to set the value."
327 (let* ((name (or name (class-name->proto type)))
328 (options (loop for (key val) on options by #'cddr
329 collect (make-instance 'protobuf-option
330 :name (if (symbolp key) (slot-name->proto key) key)
332 (message (find-message *protobuf* name))
333 (conc-name (or (conc-name-for-type type conc-name)
334 (and message (proto-conc-name message))))
335 (alias-for (and message (proto-alias-for message)))
336 (extends (and message
337 (make-instance 'protobuf-message
338 :class (proto-class message)
339 :name (proto-name message)
340 :qualified-name (proto-qualified-name message)
341 :parent (proto-parent message)
344 :enums (copy-list (proto-enums message))
345 :messages (copy-list (proto-messages message))
346 :fields (copy-list (proto-fields message))
347 :extensions (copy-list (proto-extensions message))
348 :options (remove-options
349 (or options (copy-list (proto-options message))) "default" "packed")
350 :message-type :extends ;this message is an extension
351 :documentation documentation)))
352 ;; Only now can we bind *protobuf* to the new extended message
356 "There is no message named ~A to extend" name)
357 (assert (eq type (proto-class message)) ()
358 "The type ~S doesn't match the type of the message being extended ~S"
360 (with-collectors ((forms collect-form))
361 (dolist (field fields)
362 (assert (not (member (car field)
363 '(define-enum define-message define-extend define-extension))) ()
364 "The body of ~S can only contain field and group definitions" 'define-extend)
367 (destructuring-bind (&optional progn model-type model definers extra-field extra-slot)
368 (macroexpand-1 field env)
369 (assert (eq progn 'progn) ()
370 "The macroexpansion for ~S failed" field)
371 (map () #'collect-form definers)
374 (setf (proto-parent model) extends)
375 (setf (proto-messages extends) (nconc (proto-messages extends) (list model)))
377 ;;--- Refactor to get rid of all this duplicated code!
378 (let* ((inits (cdr extra-slot))
379 (sname (car extra-slot))
380 (stable (fintern "~A-VALUES" sname))
381 (stype (getf inits :type))
382 (reader (or (getf inits :accessor)
384 (intern (if conc-name (format nil "~A~A" conc-name sname) (symbol-name sname))
385 *protobuf-package*)))
386 (writer (or (getf inits :writer)
387 (intern (format nil "~A-~A" 'set reader) *protobuf-package*)))
388 (default (getf inits :initform)))
389 (collect-form `(without-redefinition-warnings ()
390 (let ((,stable #+ccl (make-hash-table :test #'eq :weak t)
391 #+sbcl (make-hash-table :test #'eq :weakness :value)))
392 ,@(and reader `((defmethod ,reader ((object ,type))
393 (gethash object ,stable ,default))))
394 ,@(and writer `((defmethod ,writer ((object ,type) value)
395 (declare (type ,stype value))
396 (setf (gethash object ,stable) value))))
397 ;; For Python compatibility
398 (defmethod get-extension ((object ,type) (slot (eql ',sname)))
399 (values (gethash object ,stable ,default)))
400 (defmethod set-extension ((object ,type) (slot (eql ',sname)) value)
401 (setf (gethash object ,stable) value))
402 (defmethod has-extension ((object ,type) (slot (eql ',sname)))
403 (multiple-value-bind (value foundp)
404 (gethash object ,stable)
405 (declare (ignore value))
407 (defmethod clear-extension ((object ,type) (slot (eql ',sname)))
408 (remhash object ,stable)))
410 ;; 'defsetf' needs to be visible at compile time
411 `((eval-when (:compile-toplevel :load-toplevel :execute)
412 (defsetf ,reader ,writer))))))))
413 (setf (proto-message-type extra-field) :extends) ;this field is an extension
414 (setf (proto-fields extends) (nconc (proto-fields extends) (list extra-field)))
415 (setf (proto-extended-fields extends) (nconc (proto-extended-fields extends) (list extra-field)))))))
417 (multiple-value-bind (field slot idx)
418 (process-field field index :conc-name conc-name :alias-for alias-for)
419 (assert (not (find-field extends (proto-index field))) ()
420 "The field ~S overlaps with another field in ~S"
421 (proto-value field) (proto-class extends))
422 (assert (index-within-extensions-p idx message) ()
423 "The index ~D is not in range for extending ~S"
424 idx (proto-class message))
427 (let* ((inits (cdr slot))
429 (stable (fintern "~A-VALUES" sname))
430 (stype (getf inits :type))
431 (reader (or (getf inits :accessor)
433 (intern (if conc-name (format nil "~A~A" conc-name sname) (symbol-name sname))
434 *protobuf-package*)))
435 (writer (or (getf inits :writer)
436 (intern (format nil "~A-~A" 'set reader) *protobuf-package*)))
437 (default (getf inits :initform)))
438 ;; For the extended slots, each slot gets its own table
439 ;; keyed by the object, which lets us avoid having a slot in each
440 ;; instance that holds a table keyed by the slot name
441 ;; Multiple 'define-extends' on the same class in the same image
442 ;; will result in harmless redefinitions, so squelch the warnings
443 ;;--- Maybe these methods need to be defined in 'define-message'?
444 (collect-form `(without-redefinition-warnings ()
445 (let ((,stable #+ccl (make-hash-table :test #'eq :weak t)
446 #+sbcl (make-hash-table :test #'eq :weakness :value)))
447 ,@(and reader `((defmethod ,reader ((object ,type))
448 (gethash object ,stable ,default))))
449 ,@(and writer `((defmethod ,writer ((object ,type) value)
450 (declare (type ,stype value))
451 (setf (gethash object ,stable) value))))
452 (defmethod get-extension ((object ,type) (slot (eql ',sname)))
453 (values (gethash object ,stable ,default)))
454 (defmethod set-extension ((object ,type) (slot (eql ',sname)) value)
455 (setf (gethash object ,stable) value))
456 (defmethod has-extension ((object ,type) (slot (eql ',sname)))
457 (multiple-value-bind (value foundp)
458 (gethash object ,stable)
459 (declare (ignore value))
461 (defmethod clear-extension ((object ,type) (slot (eql ',sname)))
462 (remhash object ,stable)))
464 `((eval-when (:compile-toplevel :load-toplevel :execute)
465 (defsetf ,reader ,writer))))))
466 ;; This so that (de)serialization works
467 (setf (proto-reader field) reader
468 (proto-writer field) writer)))
469 (setf (proto-message-type field) :extends) ;this field is an extension
470 (setf (proto-fields extends) (nconc (proto-fields extends) (list field)))
471 (setf (proto-extended-fields extends) (nconc (proto-extended-fields extends) (list field)))))))
477 (defun index-within-extensions-p (index message)
478 (let ((extensions (proto-extensions message)))
479 (some #'(lambda (ext)
480 (and (i>= index (proto-extension-from ext))
481 (i<= index (proto-extension-to ext))))
484 (defmacro define-group (type (&key index arity name conc-name alias-for reader options
485 documentation source-location)
486 &body fields &environment env)
487 "Define a message named 'type' and a Lisp 'defclass', *and* a field named type.
488 This is deprecated in Protobufs, but if you have to use it, you must give
489 'index' as the field index and 'arity' of :required, :optional or :repeated.
490 'name' can be used to override the defaultly generated Protobufs message name.
491 The body consists of fields, or 'define-enum' or 'define-message' forms.
492 'conc-name' will be used as the prefix to the Lisp slot accessors, if it's supplied.
493 If 'alias-for' is given, no Lisp class is defined. Instead, the message will be
494 used as an alias for a class that already exists in Lisp. This feature is intended
495 to be used to define messages that will be serialized from existing Lisp classes;
496 unless you get the slot names or readers exactly right for each field, it will be
497 the case that trying to (de)serialize into a Lisp object won't work.
498 'options' is a set of keyword/value pairs, both of which are strings.
500 Fields take the form (slot &key type name default reader)
501 'slot' can be either a symbol giving the field name, or a list whose
502 first element is the slot name and whose second element is the index.
503 'type' is the type of the slot.
504 'name' can be used to override the defaultly generated Protobufs field name.
505 'default' is the default value for the slot.
506 'reader' is a Lisp slot reader function to use to get the value, instead of
507 using 'slot-value'; this is often used when aliasing an existing class.
508 'writer' is a Lisp slot writer function to use to set the value."
509 (check-type index integer)
510 (check-type arity (member :required :optional :repeated))
511 (let* ((slot (or type (and name (proto->slot-name name *protobuf-package*))))
512 (name (or name (class-name->proto type)))
513 (options (loop for (key val) on options by #'cddr
514 collect (make-instance 'protobuf-option
515 :name (if (symbolp key) (slot-name->proto key) key)
517 (conc-name (conc-name-for-type type conc-name))
519 (let ((msg-conc (proto-conc-name *protobuf*)))
521 (intern (format nil "~A~A" msg-conc slot) *protobuf-package*)))))
522 (mslot (unless alias-for
523 `(,slot ,@(case arity
527 `(:type (or ,type null)
530 `(:type (list-of ,type)
533 `(:accessor ,reader))
534 :initarg ,(kintern (symbol-name slot)))))
535 (mfield (make-instance 'protobuf-field
536 :name (slot-name->proto slot)
539 :qualified-name (make-qualified-name *protobuf* (slot-name->proto slot))
545 :message-type :group))
546 (message (make-instance 'protobuf-message
549 :qualified-name (make-qualified-name *protobuf* name)
553 :options (remove-options options "default" "packed")
554 :message-type :group ;this message is a group
555 :documentation documentation
556 :source-location source-location))
558 ;; Only now can we bind *protobuf* to the (group) message
559 (*protobuf* message))
560 (with-collectors ((slots collect-slot)
561 (forms collect-form))
562 (dolist (field fields)
564 ((define-enum define-message define-extend define-extension define-group)
565 (destructuring-bind (&optional progn model-type model definers extra-field extra-slot)
566 (macroexpand-1 field env)
567 (assert (eq progn 'progn) ()
568 "The macroexpansion for ~S failed" field)
569 (map () #'collect-form definers)
572 (setf (proto-enums message) (nconc (proto-enums message) (list model))))
573 ((define-message define-extend)
574 (setf (proto-parent model) message)
575 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
576 (when (eq (proto-message-type model) :extends)
577 (setf (proto-extenders message) (nconc (proto-extenders message) (list model)))))
579 (setf (proto-parent model) message)
580 (setf (proto-messages message) (nconc (proto-messages message) (list model)))
582 (collect-slot extra-slot))
583 (setf (proto-fields message) (nconc (proto-fields message) (list extra-field))))
585 (setf (proto-extensions message) (nconc (proto-extensions message) (list model)))))))
587 (multiple-value-bind (field slot idx)
588 (process-field field index :conc-name conc-name :alias-for alias-for)
589 (assert (not (find-field message (proto-index field))) ()
590 "The field ~S overlaps with another field in ~S"
591 (proto-value field) (proto-class message))
595 (setf (proto-fields message) (nconc (proto-fields message) (list field)))))))
597 ;; If we've got an alias, define a a type that is the subtype of
598 ;; the Lisp class that typep and subtypep work
599 (unless (or (eq type alias-for) (find-class type nil))
600 (collect-form `(deftype ,type () ',alias-for)))
601 ;; If no alias, define the class now
602 (collect-form `(defclass ,type () (,@slots)
603 ,@(and documentation `((:documentation ,documentation))))))
607 ((with-proto-source-location (,type ,name protobuf-message ,@source-location)
612 (defun process-field (field index &key conc-name alias-for)
613 "Process one field descriptor within 'define-message' or 'define-extend'.
614 Returns a 'proto-field' object, a CLOS slot form and the incremented field index."
615 (when (i= index 18999) ;skip over the restricted range
617 (destructuring-bind (slot &rest other-options
618 &key type reader writer name (default nil default-p) packed
619 options documentation &allow-other-keys) field
620 (let* ((idx (if (listp slot) (second slot) (iincf index)))
621 (slot (if (listp slot) (first slot) slot))
624 (intern (format nil "~A~A" conc-name slot) *protobuf-package*))))
626 (loop for (key val) on other-options by #'cddr
627 unless (member key '(:type :reader :writer :name :default :packed :documentation))
628 collect (make-instance 'protobuf-option
629 :name (slot-name->proto key)
631 (loop for (key val) on options by #'cddr
632 collect (make-instance 'protobuf-option
633 :name (if (symbolp key) (slot-name->proto key) key)
635 (multiple-value-bind (ptype pclass)
636 (clos-type-to-protobuf-type type)
637 (multiple-value-bind (reqd vectorp)
638 (clos-type-to-protobuf-required type)
639 (let* ((default (if (eq reqd :repeated)
640 (if vectorp $empty-vector $empty-list) ;to distinguish between list-of and vector-of
641 (if default-p default $empty-default)))
642 (cslot (unless alias-for
647 `(:accessor ,reader)))
650 :initarg ,(kintern (symbol-name slot))
651 ,@(cond ((eq reqd :repeated)
652 ;; Repeated fields get a container for their elements
654 `(:initform (make-array 5 :fill-pointer 0 :adjustable t))
656 ((and (not default-p)
658 ;; Use unbound for booleans only
659 (not (eq pclass :bool)))
662 `(:initform ,(protobuf-default-to-clos-init default type)))))))
663 (field (make-instance 'protobuf-field
664 :name (or name (slot-name->proto slot))
667 :qualified-name (make-qualified-name *protobuf* (or name (slot-name->proto slot)))
669 ;; One of :required, :optional or :repeated
676 ;; Pack the field only if requested and it actually makes sense
677 :packed (and (eq reqd :repeated) packed t)
679 :documentation documentation)))
680 (values field cslot idx)))))))
682 (defparameter *rpc-package* nil
683 "The Lisp package that implements RPC.
684 This should be set when an RPC package that uses CL-Protobufs gets loaded.")
685 (defparameter *rpc-call-function* nil
686 "The Lisp function that implements RPC client-side calls.
687 This should be set when an RPC package that uses CL-Protobufs gets loaded.")
689 ;; Define a service named 'type' with generic functions declared for
690 ;; each of the methods within the service
691 (defmacro define-service (type (&key name options
692 documentation source-location)
694 "Define a service named 'type' and Lisp 'defgeneric' for all its methods.
695 'name' can be used to override the defaultly generated Protobufs service name.
696 'options' is a set of keyword/value pairs, both of which are strings.
698 The body is a set of method specs of the form (name (input-type output-type) &key options).
699 'input-type' and 'output-type' may also be of the form (type &key name)."
700 (let* ((name (or name (class-name->proto type)))
701 (options (loop for (key val) on options by #'cddr
702 collect (make-instance 'protobuf-option
703 :name (if (symbolp key) (slot-name->proto key) key)
705 (service (make-instance 'protobuf-service
708 :qualified-name (make-qualified-name *protobuf* name)
711 :documentation documentation
712 :source-location source-location))
714 (with-collectors ((forms collect-form))
715 (dolist (method method-specs)
716 (destructuring-bind (function (input-type output-type)
717 &key name options documentation source-location) method
718 (let* ((input-name (and (listp input-type)
719 (getf (cdr input-type) :name)))
720 (input-type (if (listp input-type) (car input-type) input-type))
721 (output-name (and (listp output-type)
722 (getf (cdr output-type) :name)))
723 (output-type (if (listp output-type) (car output-type) output-type))
724 (options (loop for (key val) on options by #'cddr
725 collect (make-instance 'protobuf-option
726 :name (if (symbolp key) (slot-name->proto key) key)
728 (package *protobuf-package*)
730 (server-fn (intern (format nil "~A-~A" 'do function) package))
731 (method (make-instance 'protobuf-method
733 :name (or name (class-name->proto function))
734 :qualified-name (make-qualified-name *protobuf* (or name (class-name->proto function)))
736 :client-stub client-fn
737 :server-stub server-fn
738 :input-type input-type
739 :input-name (or input-name (class-name->proto input-type))
740 :output-type output-type
741 :output-name (or output-name (class-name->proto output-type))
744 :documentation documentation
745 :source-location source-location)))
746 (setf (proto-methods service) (nconc (proto-methods service) (list method)))
747 ;; The following are the hooks to CL-Stubby
748 (let* ((vinput (intern (format nil "~A-~A" (symbol-name input-type) 'in) package))
749 (voutput (intern (format nil "~A-~A" (symbol-name output-type) 'out) package))
750 (vchannel (intern (symbol-name 'channel) package))
751 (vcallback (intern (symbol-name 'callback) package)))
752 ;; The client side stub, e.g., 'read-air-reservation'.
753 ;; The expectation is that CL-Stubby will provide macrology to make it
754 ;; easy to implement a method for this on each kind of channel (HTTP, TCP socket,
755 ;; IPC, etc). Unlike C++/Java/Python, we don't need a client-side subclass,
756 ;; because we can just use multi-methods.
757 ;; The CL-Stubby macros take care of serializing the input, transmitting the
758 ;; request over the wire, waiting for input (or not if it's asynchronous),
759 ;; filling in the output, and calling the callback (if it's asynchronous).
760 ;; It's not very Lispy to side-effect an output object, but it makes
761 ;; asynchronous calls simpler.
762 (collect-form `(defgeneric ,client-fn (,vchannel ,vinput ,voutput &key ,vcallback)
763 ,@(and documentation `((:documentation ,documentation)))
764 #-sbcl (declare (values ,output-type))
765 (:method (,vchannel (,vinput ,input-type) (,voutput ,output-type) &key ,vcallback)
766 (declare (ignorable ,vchannel ,vcallback))
767 (let ((call (and *rpc-package* *rpc-call-function*)))
769 "There is no RPC package loaded!")
770 (funcall call ,vchannel ',method ,vinput ,voutput
771 :callback ,vcallback)))))
772 ;; The server side stub, e.g., 'do-read-air-reservation'.
773 ;; The expectation is that the server-side program will implement
774 ;; a method with the business logic for this on each kind of channel
775 ;; (HTTP, TCP socket, IPC, etc), possibly on a server-side subclass
776 ;; of the input class
777 ;; The business logic is expected to perform the correct operations on
778 ;; the input object, which arrived via Protobufs, and produce an output
779 ;; of the given type, which will be serialized as a result.
780 ;; The channel objects hold client identity information, deadline info,
781 ;; etc, and can be side-effected to indicate success or failure
782 ;; CL-Stubby provides the channel classes and does (de)serialization, etc
783 (collect-form `(defgeneric ,server-fn (,vchannel ,vinput ,voutput)
784 ,@(and documentation `((:documentation ,documentation)))
785 #-sbcl (declare (values ,output-type))))))))
789 ((with-proto-source-location (,type ,name protobuf-service ,@source-location)
793 ;;; Ensure everything in a Protobufs schema is defined
795 (defvar *undefined-messages*)
797 ;; A very useful tool during development...
798 (defun ensure-all-schemas ()
801 (loop for p being the hash-values of *all-schemas*
803 #'string< :key #'proto-name)))
804 (mapcan #'ensure-schema protos)))
806 (defgeneric ensure-schema (schema)
808 "Ensure that all of the types are defined in the Protobufs schema 'schema'.
809 This returns two values:
810 - A list whose elements are (<undefined-type> \"message:field\" ...)
811 - The accumulated warnings table that has the same information as objects.")
812 (:method ((schema protobuf-schema))
813 (let ((*undefined-messages* (make-hash-table))
814 (trace (list schema)))
815 (map () (curry #'ensure-message trace) (proto-messages schema))
816 (map () (curry #'ensure-service trace) (proto-services schema))
817 (loop for type being the hash-keys of *undefined-messages*
818 using (hash-value things)
820 (mapcar #'(lambda (thing)
821 (format nil "~A:~A" (proto-name (car thing)) (proto-name (cdr thing))))
822 things)) into warnings
823 finally (return (values warnings *undefined-messages*))))))
825 (defgeneric ensure-message (trace message)
826 (:method (trace (message protobuf-message))
827 (let ((trace (cons message trace)))
828 (map () (curry #'ensure-message trace) (proto-messages message))
829 (map () (curry #'ensure-field trace message) (proto-fields message)))))
831 (defgeneric ensure-field (trace message field)
832 (:method (trace message (field protobuf-field))
833 (ensure-type trace message field (proto-class field))))
835 (defgeneric ensure-service (trace service)
836 (:method (trace (service protobuf-service))
837 (map () (curry #'ensure-method trace service) (proto-methods service))))
839 (defgeneric ensure-method (trace service method)
840 (:method (trace service (method protobuf-method))
841 (ensure-type trace service method (proto-input-type method))
842 (ensure-type trace service method (proto-output-type method))))
844 ;; 'message' and 'field' can be a message and a field or a service and a method
845 (defun ensure-type (trace message field type)
846 (unless (keywordp type)
847 (let ((msg (loop for p in trace
848 thereis (or (find-message p type)
849 (find-enum p type)))))
851 (push (cons message field) (gethash type *undefined-messages*))))))