580:, and multiple nodes may be involved in each tier. Each type of node has a different name and all are capable of manipulating objects and executing business logic. A collection of nodes can be deployed across one or several machines. Database servers handle data storage and can also execute business logic, while application servers handle processing. In a three-tier model, presentation clients provide the user interface. JADE also provides a two-tier client that combines the abilities of an application server and presentation client. Traditionally, these three tiers would be created by combining three programs and having them communicate to form one system. Having the different programs separate like this has many advantages, the main one is that the system becomes scalable, that is, raising the power of the system involves simply adding more nodes.
588:
happening on one computer. When the program runs on three tiers, JADE automatically knows to run all the code by default on the application server, and to send database requests up to the database server and user interface information down to the presentation client. However, it is very easy for the programmer to switch the location at which a particular method is run and move it to a different tier by changing the method signature. Because of this, the decision on where a particular piece of code should run can be made late in the development cycle, and refactoring code to run on different parts of the system ends up being a lot easier because of the way JADE allows end-to-end development of software.
336:
77:
117:
219:
36:
626:
be a very powerful computer, and it does not require a fast network connection as it is not loading data from the database – JADE thin clients are often run over a dial-up connection. This is the reason they are called thin clients, as there is not a heavy requirement on computational power to run these clients.
583:
Designing a system like this gives the programmer a decision to consider every time they want to code in a particular function. They need to decide whether the function would run best on the database server, application server or presentation client before they begin coding as it will be difficult to
625:
The Smart Thin Client works by connecting to an
Application Server which generally does all the processing on behalf of the Smart Thin Client, meaning the thin client only needs to be responsible for displaying forms and taking input. This means the computer running the thin client does not have to
629:
The
Standard Client is just the Smart Thin Client combined with the Application Server on one machine. In this case, the node running the client does all of the processing as well as the presentation. Standard clients have greater demands on computational power than thin clients, as they must load
478:
All the code for a JADE application is stored in its object-oriented database. This allows for multi-user development as the database maintains concurrency control, and with each piece of the code being a separate object in the database, it is often possible to recode a system while it is live and
702:
are used to allow different programs to communicate with each other from remote locations in an object-oriented form. Web services cannot be accessed directly by human users. One of the uses of Web services with JADE is to allow other technologies such as .NET or Java to use JADE as the backend
587:
This is different for JADE applications, as they are coded as one application from end-to-end. When creating a JADE application, the programmer can think as if they were creating a program that will be running on the database server – as if all the data storage, processing and presentation were
711:
In addition to Web services, JADE is also capable of interfacing with other programs through language APIs (including .NET, Java, C/C++), DLL calls, ActiveX/COM objects and .NET assemblies. This allows other programs to access objects and execute methods, and can be used to provide a different
533:
to the programmer as if all the objects in the entire database were in local memory. Most of the time, JADE's object-oriented database is used in a multi-user system, and so JADE makes it appear to the programmer as if all the objects in the database were stored in shared memory that all users
474:
and define their properties and methods. Instead of locating methods in large files, programmers select the method they would like to edit and only the code for that particular method is displayed. Also instead of compiling all the code of a program at once, in JADE, each method is compiled
525:
JADE automatically works in the background to store and retrieve the object in the database when necessary. Persistent objects can be distributed across multiple co-operating servers, with JADE automatically handling object caching and cache coherency.
671:
JADE supports deployment of applications to the web through its HTML documents feature. These work very similarly to ASP.NET, where developers create templates of HTML pages and leave parts in the template for the program to fill in.
487:
The main goal of JADE was to create a seamlessly integrated programming language that would allow developers to create one application that would go from end-to-end instead of having to write three separate applications for the
443:. JADE was designed to have all the most important features of object-oriented programming, but does not support the overloading of methods or operators, and until Jade 2018 lacked parameterised constructors.
575:
methodology with applications being split into three tiers – data storage, processing and presentation. In the data storage and processing tiers, JADE systems are a collection of co-operating servers, called
516:
is similar to creating objects in other object-oriented programming languages – the object is simply created in memory, and then lost when the program ends. On the other hand, when an object is created as
712:
interface to a JADE application. JADE 6.2 provided a Java API, .NET Assembly integration and the ability to run Smart Thin
Clients on Windows Mobile devices. JADE 6.3 provides an API for .NET languages.
754:
Currently JADE applications can only be run on
Windows, Linux support has been dropped. JADE 6.2 allows Smart Thin Clients and a specialised Standard Client to run on Windows Mobile devices.
687:
When JADE applications use HTML documents, they are no longer using the same technology from end to end. Checking at the front end of the system may be done through JavaScript for example.
424:, which was derived from Pascal. While it includes innovations lacking in Pascal or Modula-2, it lacks certain features of other modern object-oriented languages such as C# and Java.
663:, without any modifications to the code. This is a very quick way for programmers that are not competent with HTML and other web technologies to deliver a program through the web.
559:
purposes JADE since 2010 has provided a "Relational
Population Service" that enables automatically replicating objects from its native object-orientated database to one or more
977:
Witten, Ian H.; Birtwistle, Graham M.; Cleary, John; Hill, David R.; Levinson, Danny; Lomow, Greg; Neal, Radford; Peterson, Murray; Unger, Brian W.; Wyvill, Brian (July 1983).
537:
With all of the program code centralised on the database server as well the data, all client nodes can be programmed as if they were running on the database server.
1093:
655:
JADE Forms have an interesting twist to them though. It is actually possible to run a JADE Forms application through a web browser by changing its mode to
610:
In the same schema, a JADE developer can create many completely separate applications which may provide different interfaces to access the same database.
240:
233:
462:
methodology, as model classes can be put in one schema, then the controller and view classes can be built on top of the model classes in a subschema.
735:
Many versions of the same form can be created to suit each language. This means interfaces can look entirely different from one language to the next.
544:-compliant, and has all of the standard features such as atomic transactions, locking, rollback, crash recovery and the ability to keep one or more
512:
is a native part of its language. For example, when creating an object in JADE, it can be created as transient or persistent. Creating an object as
1108:
1098:
1058:
596:
Programmers have the facility to allow three different kinds of clients to connect to a JADE system. These three types of clients are named:
91:
134:
49:
1088:
283:
181:
1113:
1083:
1073:
255:
153:
1103:
1078:
703:
object-oriented database. Web services also allow JADE systems to interoperate with services provided by other non-JADE systems.
262:
160:
458:
in .NET, but have a hierarchy, and inherit classes from superschemas. This becomes useful especially when programming using the
521:, when the program ends, the object will still exist and be there the next time the program starts up. So, when an object is
408:
Although a free limited licence is available for development, using the JADE platform requires per-process fees to be paid.
269:
167:
355:
24:
746:
JADE will automatically switch to the language it detects on the system if the language is provided by the developer.
251:
149:
320:
302:
200:
63:
618:
JADE Forms applications are made up of forms, as the name suggests. Clients need to connect through the JADE Smart
55:
20:
138:
643:
Smart thin clients can be packaged up so they can be installed and run on client computers in several clicks.
459:
417:
949:
439:
Like all of the other popular programming languages used to create database-driven software, JADE is fully
856:
637:
Out of the three kinds of clients, JADE Forms provide the shortest development time of JADE applications.
440:
390:
373:
Designed as an end-to-end development environment to allow systems to be coded in one language from the
851:
739:
276:
174:
659:. When this happens, JADE automatically generates HTML code to make pages that resemble the forms and
529:
There are very few differences between manipulating transient and persistent objects so JADE makes it
508:
The most striking difference between JADE and other object-oriented programming languages is that its
885:
545:
351:
471:
394:
229:
127:
572:
470:
JADE programs are developed using a user interface that allows programmers to visually create
552:
899:
548:
synchronised with the main database for backup, disaster recovery and performance reasons.
19:
This article is about the end-to-end development environment. For the Java middleware, see
1028:
475:
individually as soon as the method is completed, meaning code can be checked immediately.
94:. Please help update this article to reflect recent events or newly available information.
8:
771:
560:
497:
660:
493:
378:
363:
690:
Offloading some of the processing to front-end clients is no longer as easy or secure.
1000:
577:
990:
924:
335:
861:
833:
509:
489:
374:
367:
347:
350:
software development and deployment platform product from the New
Zealand-based
978:
556:
447:
386:
742:
of the system and so they can implement their own language-dependent features.
1067:
1053:
1004:
584:
change that decision once the functionality is coded into one of the tiers.
721:
563:. This feature supports Microsoft SQL Server versions 2000, 2005 and 2008.
451:
995:
699:
619:
402:
881:
479:
online as long as the parts of the system being changed are not in use.
354:, first released in 1996. It consists of the JADE programming language,
651:
Cannot reach a worldwide audience as is possible on the World Wide Web.
622:
or
Standard Client to be able to run applications that use JADE Forms.
455:
732:, which means they will be change depending on the current language.
218:
116:
534:
connected to the system can access, even from different computers.
428:
421:
359:
500:
and then write the code for them to communicate with each other.
23:. For the Pug (formerly Jade) Javascript templating engine, see
839:
The first version of JADE was JADE 3, released
September 1996.
1017:
903:
836:
and is currently developed by the Jade
Software Corporation.
398:
1046:
630:
data from the database as well as do their own processing.
541:
1059:
JADE 6.1 delivers data replication to
Microsoft SQL Server
976:
738:
The developer has methods available to access the current
551:
To interoperate with relational databases for reporting,
382:
640:
Allows developers to use the same technology end-to-end.
979:"Jade: a distributed software prototyping environment"
842:
The current version is JADE 2022, replacing JADE 2020
762:
In this section are some short examples of JADE code.
679:
Allows the application to reach a worldwide audience.
540:JADE's database is inherently object-oriented, and
141:. Unsourced material may be challenged and removed.
950:"JADE: Obscure Programming Language of the Month"
1065:
972:
970:
1011:
675:The advantages of using HTML documents are:
633:The advantages of using JADE Forms include:
16:Software development and deployment platform
1094:Object-oriented database management systems
1054:Examples and Tutorials for JADE Programmers
967:
64:Learn how and when to remove these messages
431:programs and was initially its core role.
994:
943:
941:
715:
321:Learn how and when to remove this message
303:Learn how and when to remove this message
201:Learn how and when to remove this message
724:programs. It does this in several ways:
334:
90:Relevant discussion may be found on the
571:Database-driven software, often uses a
1066:
938:
420:; its syntax is based on the language
239:Please improve this article by adding
1109:Programming languages created in 1996
1099:Object-oriented programming languages
947:
917:
832:JADE was originally conceived by Sir
446:Classes in JADE are kept together in
465:
450:. Schemas serve the same purpose as
434:
212:
139:adding citations to reliable sources
110:
70:
29:
983:ACM SIGOPS Operating Systems Review
925:"Scoop Independent News – JADE 6.3"
706:
591:
566:
416:In syntax, JADE is very similar to
13:
1089:Data-centric programming languages
503:
356:Integrated development environment
339:The Jade Software Corporation logo
25:Comparison of web template engines
14:
1125:
1114:Software companies of New Zealand
1084:Class-based programming languages
1074:Algol programming language family
1038:
900:"Jade Software delivers Jade 7.1"
666:
45:This article has multiple issues.
1104:Persistent programming languages
1079:Concurrent programming languages
757:
252:"JADE" programming language
217:
150:"JADE" programming language
115:
75:
34:
21:Java Agent Development Framework
765:
694:
427:JADE is able to import and run
385:for other languages, including
126:needs additional citations for
53:or discuss these issues on the
1022:
892:
874:
749:
1:
867:
613:
241:secondary or tertiary sources
7:
857:Object-oriented programming
845:
482:
411:
10:
1130:
948:Toady, Tim (3 June 2009).
852:Database management system
827:
546:secondary database servers
18:
1018:Jade Software Corporation
886:Jade Software Corporation
728:Strings can be marked as
352:Jade Software Corporation
84:This article needs to be
798:MsgBox_Information_Icon
720:JADE natively supports
683:The disadvantages are:
647:The disadvantages are:
716:Multilingual abilities
340:
228:relies excessively on
996:10.1145/850742.850744
553:business intelligence
460:model–view–controller
338:
135:improve this article
882:"Jade – Who We Are"
561:relational database
498:presentation client
381:, it also provides
370:management system.
494:application server
364:application server
341:
466:Program structure
435:Programming model
346:is a proprietary
331:
330:
323:
313:
312:
305:
287:
211:
210:
203:
185:
109:
108:
68:
1121:
1050:
1049:
1047:Official website
1032:
1029:"Latest version"
1026:
1020:
1015:
1009:
1008:
998:
974:
965:
964:
962:
960:
945:
936:
935:
933:
931:
921:
915:
914:
912:
910:
896:
890:
889:
878:
823:
819:
816:
813:
803:
799:
795:
791:
787:
783:
780:
707:Interoperability
592:Types of clients
567:Three-tier model
326:
319:
308:
301:
297:
294:
288:
286:
245:
221:
213:
206:
199:
195:
192:
186:
184:
143:
119:
111:
104:
101:
95:
79:
78:
71:
60:
38:
37:
30:
1129:
1128:
1124:
1123:
1122:
1120:
1119:
1118:
1064:
1063:
1045:
1044:
1041:
1036:
1035:
1027:
1023:
1016:
1012:
975:
968:
958:
956:
946:
939:
929:
927:
923:
922:
918:
908:
906:
898:
897:
893:
880:
879:
875:
870:
862:Object database
848:
834:Gilbert Simpson
830:
825:
821:
818:"Hello, World!"
817:
814:
811:
805:
801:
797:
793:
790:"Hello, World!"
789:
786:"Hello, World!"
785:
781:
778:
768:
760:
752:
718:
709:
697:
669:
616:
594:
569:
510:object database
506:
504:Object database
490:database server
485:
468:
441:object-oriented
437:
414:
375:database server
368:object database
348:object-oriented
327:
316:
315:
314:
309:
298:
292:
289:
246:
244:
238:
234:primary sources
222:
207:
196:
190:
187:
144:
142:
132:
120:
105:
99:
96:
89:
80:
76:
39:
35:
28:
17:
12:
11:
5:
1127:
1117:
1116:
1111:
1106:
1101:
1096:
1091:
1086:
1081:
1076:
1062:
1061:
1056:
1051:
1040:
1039:External links
1037:
1034:
1033:
1021:
1010:
966:
937:
916:
891:
872:
871:
869:
866:
865:
864:
859:
854:
847:
844:
829:
826:
810:helloWorld();
809:
794:MsgBox_OK_Only
777:helloWorld();
776:
774:code in JADE:
772:"Hello World!"
767:
764:
759:
756:
751:
748:
744:
743:
736:
733:
717:
714:
708:
705:
696:
693:
692:
691:
688:
681:
680:
668:
667:HTML documents
665:
653:
652:
645:
644:
641:
638:
615:
612:
608:
607:
604:
603:HTML Documents
601:
593:
590:
568:
565:
557:data warehouse
505:
502:
484:
481:
467:
464:
436:
433:
413:
410:
387:.NET Framework
329:
328:
311:
310:
225:
223:
216:
209:
208:
123:
121:
114:
107:
106:
83:
81:
74:
69:
43:
42:
40:
33:
15:
9:
6:
4:
3:
2:
1126:
1115:
1112:
1110:
1107:
1105:
1102:
1100:
1097:
1095:
1092:
1090:
1087:
1085:
1082:
1080:
1077:
1075:
1072:
1071:
1069:
1060:
1057:
1055:
1052:
1048:
1043:
1042:
1030:
1025:
1019:
1014:
1006:
1002:
997:
992:
988:
984:
980:
973:
971:
955:
951:
944:
942:
926:
920:
905:
901:
895:
887:
883:
877:
873:
863:
860:
858:
855:
853:
850:
849:
843:
840:
837:
835:
808:
775:
773:
763:
758:Code examples
755:
747:
741:
737:
734:
731:
727:
726:
725:
723:
713:
704:
701:
689:
686:
685:
684:
678:
677:
676:
673:
664:
662:
658:
650:
649:
648:
642:
639:
636:
635:
634:
631:
627:
623:
621:
611:
605:
602:
599:
598:
597:
589:
585:
581:
579:
574:
564:
562:
558:
554:
549:
547:
543:
538:
535:
532:
527:
524:
520:
515:
511:
501:
499:
495:
491:
480:
476:
473:
463:
461:
457:
453:
452:Java packages
449:
444:
442:
432:
430:
425:
423:
419:
409:
406:
404:
400:
396:
392:
388:
384:
380:
376:
371:
369:
365:
362:, integrated
361:
357:
353:
349:
345:
337:
333:
325:
322:
307:
304:
296:
293:December 2012
285:
282:
278:
275:
271:
268:
264:
261:
257:
254: –
253:
249:
248:Find sources:
242:
236:
235:
231:
226:This article
224:
220:
215:
214:
205:
202:
194:
191:December 2012
183:
180:
176:
173:
169:
166:
162:
159:
155:
152: –
151:
147:
146:Find sources:
140:
136:
130:
129:
124:This article
122:
118:
113:
112:
103:
100:December 2016
93:
87:
82:
73:
72:
67:
65:
58:
57:
52:
51:
46:
41:
32:
31:
26:
22:
1024:
1013:
989:(3): 10–23.
986:
982:
957:. Retrieved
953:
928:. Retrieved
919:
907:. Retrieved
894:
876:
841:
838:
831:
806:
770:This is the
769:
766:Hello World!
761:
753:
745:
730:translatable
729:
722:multilingual
719:
710:
700:Web services
698:
695:Web services
682:
674:
670:
656:
654:
646:
632:
628:
624:
617:
609:
606:Web Services
595:
586:
582:
570:
550:
539:
536:
530:
528:
522:
518:
513:
507:
486:
477:
469:
445:
438:
426:
415:
407:
403:Web services
377:down to the
372:
343:
342:
332:
317:
299:
290:
280:
273:
266:
259:
247:
227:
197:
188:
178:
171:
164:
157:
145:
133:Please help
128:verification
125:
97:
85:
61:
54:
48:
47:Please help
44:
930:21 December
909:21 December
750:Portability
657:web-enabled
620:thin client
1068:Categories
868:References
614:JADE Forms
600:JADE Forms
573:three-tier
523:persistent
519:persistent
456:namespaces
263:newspapers
230:references
161:newspapers
50:improve it
1005:0163-5980
954:DevTopics
514:transient
92:talk page
56:talk page
959:12 March
846:See also
784:.msgBox(
661:controls
483:Features
429:LINC 4GL
422:Modula-2
412:Language
360:debugger
828:History
472:classes
448:schemas
379:clients
277:scholar
175:scholar
86:updated
1003:
740:locale
531:appear
418:Pascal
279:
272:
265:
258:
250:
177:
170:
163:
156:
148:
904:ZDnet
815:write
812:begin
779:begin
578:nodes
284:JSTOR
270:books
182:JSTOR
168:books
1001:ISSN
961:2021
932:2019
911:2019
555:and
542:ACID
496:and
401:and
391:Java
383:APIs
366:and
358:and
344:JADE
256:news
154:news
991:doi
822:end
807:or
802:end
800:);
782:app
454:or
399:C++
232:to
137:by
1070::
999:.
987:17
985:.
981:.
969:^
952:.
940:^
902:.
884:.
824:;
820:;
804:;
796:+
792:,
788:,
492:,
405:.
393:,
389:,
243:.
59:.
1031:.
1007:.
993::
963:.
934:.
913:.
888:.
397:/
395:C
324:)
318:(
306:)
300:(
295:)
291:(
281:·
274:·
267:·
260:·
237:.
204:)
198:(
193:)
189:(
179:·
172:·
165:·
158:·
131:.
102:)
98:(
88:.
66:)
62:(
27:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
_logo.svg){kind=logo}