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Informix Genero, a modern IBM offering developed beneath partnership with 4 Js structure tools, is a analytic enhancement to the Informix 4GL language and atmosphere that offers wide capabilities for developing simultaneous web and laptop GUI functions, studies, and internet services.
looking for a short, budget friendly alternative to rewriting IBM Informix 4GL purposes? With IBM Informix Genero, clients can recompile 4GL purposes and elope them as GUI and internet applications whereas conserving the traffic logic. transformed purposes are able to deploy on a considerable number of platforms, in most circumstances with out a code change and intensely cramped trying out. It permits clients to leverage their ability foundation to replace "eco-friendly reveal" applications and enhance the graphical interface over time, total while the applications continues to be purchasable.
ASuperset of Informix 4GL
Informix Genero is a superset of Informix 4GL. because just about total 4GL syntax and semantics exist in Informix Genero, the Informix Genero compiler can recompile the 4GL supply code. In confident instances, the Genero compiler is stricter than the 4GL compiler, however any changes required for the Genero compiler are additionally legitimate for the 4GL compiler. as soon as the 4GL source code is recompiled with the Genero compiler, it might probably then be elope the usage of the numerous Informix Genero runtime apparatus options. because the 4GL supply code is still unchanged, the trying out distress required to flood modernized functions into production is significantly decreased.
After recompilation, the resulting GUI or net application can rear expertise of wealthy consumer-interface components whereas leveraging the underlying 4GL enterprise common sense. And, since the converted utility continues to be totally useful and usable after complication, pull-down menus, toolbars, actual dialog packing containers, and different favourite GUI controls can besides be phased in over time, and the modern software can be automatically obtainable to the user neighborhood. users can engage with the software the employ of the same keyboard-based mostly controls, role keys, default menus, and different primary controls that had been defined for 4GL.
Modernizing Versus changing to Java
Let's believe an illustration of a customary Informix 4GL application suite such as
242 separately compiled 4GL courses
1522 4GL source-code modules
596 screens (4GL types)
575 KLOC of 4GL supply code
This utility gives records-entry and records-preservation operations through a personality-based interface, and has some batch-updating and reporting services. The application includes 596 displays, of which 250 (~40%) are used for interior records preservation and housekeeping operations. The remaining 346 monitors can be create to the consumer for facts entry, but best about 100 of these displays are used generally.
changing the fashioned application to Java would be an "all or nothing method," as a minimum with respect to leveraging the customary 4GL supply code. The complete software would bask in to be rewritten. Assuming about 160 traces of code per day (based on the Gartner Group1 estimates for code modernization), the coding distress for this venture may well be mammoth: over one hundred sixty person months. Assuming that modern code written in Java has an error expense of approximatley 61 defects per a thousand strains of code2, extra distress would deserve to be spent debugging and fixing doubtlessly as many as 35K blunders. also, because the modern software could be utterly modern Java first-rate judgment, a complete trying out and certification system would requisite to be carried out, as with any other modern application.
Modernizing the customary utility with Informix Genero would reuse the 4GL source code. The 4GL source code would be recompiled with the Informix Genero compiler in order that the utility could elope on various styles of screen valued clientele. The compiler path within the construct file might with no mischance be modified to collect the Genero applications in the equal build atmosphere. There would doubtless be just a few minor differences between the 4GL and Genero compilers and there can be changes essential for coping with exterior C code. After any required alterations would be made, the Genero utility can be in a position to elope in text mode, identical to the fashioned Informix 4GL utility.
Configuring the Informix Genero computing device client would allow the Genero software to be rendered in GUI mode on windows, Linux, and Mac operating systems. making a diminutive XML configuration file for the Informix Genero utility Server would enable the same utility to be rendered in internet browsers. trying out the utility may open instantly. because this utility would be using the present 4GL syntax and semantics, the useful and verification checking out would require appreciably much less distress than for a modern Java-based mostly utility.
the hassle to raise this utility would deserve to focal point only on the graphical person interface of the one hundred monitors that are -used generally for records entry. The underlying first-rate judgment can be left mostly unchanged. The different 246 displays which are offered to the user could be deployed in a phased method, most likely 50 monitors a month over a 5-month length. The remaining 250 monitors (and the underlying logic) may well be left unchanged because they'd be used infrequently by artery of interior workforce. less distress would be spent on checking out and the certification for the Informix Genero challenge than for the Java venture.
The bottom line
converting the Informix 4GL application to Java would rear tremendous time and be lofty priced. The compatibility between Informix Genero and Informix 4GL saves time and funds by using leveraging the underlying traffic common sense of the current application. Informix Genero minimizes introductory prices and efforts, and enables the graphical consumer interface to be enhanced over time whereas the software remains available to the consumer community.
1Gartner community, "Forecasting the global IT functions industry: 1999"
2Geoffrey Phipps, "comparing followed trojan horse and productiveness rates for Java and C++," application-follow & event, v.29(4), p.345-358, 1999
concerning the creator:
Shawn Moe is a software architect at IBM, specializing in UI modernization, SQL compatibility, application construction, and tooling assist for the Informix database servers. For more suggestions, evaporate to www-01.ibm.com/software/information/informix.
4 J's enterprise construction Suite offers graphical structure device for Informix 4GL clients. whereas retaining investments in 4GL supply code, it allows developers to open applications seamlessly to vast variety of graphical computing environments. It provides N-tier skinny client architecture and scales to heaps of clients concurrently. users can write applications once and set up anywhere, with out recompilation for diverse working programs.
original Press release:
four J's enterprise structure Suite presents a Graphical construction device for Informix 4GL users
At a GlanceFour J's enterprise structure Suite:o enables applications to elope throughout heterogeneous customer, database, and operating device environments for a single source code throughout the intranet and the Interneto Improves developer productiveness via structure on present 4GL enterprise logico Develops intention-constructed enterprise purposes option to J2EE, EJB, .Neto allows for you to set aside in writing once and installation any place, without recompilationo enables projects to be achieved on time and within funds whereas specializing in the company logic in preference to the infrastructureo gives N-tier thin customer architecture and scales to heaps of users simultaneously
OverviewFour J's is frequent within the Informix(TM) neighborhood because the creator of Informix Dynamic 4GL, a graphical construction tool for Informix 4GL (I-4GL) clients.
The traffic structure Suite brings modern cost to traffic purposes written in I-4GL or Dynamic 4GL (D4GL). This efficacious and scalable software server platform accesses numerous databases (Informix, DB2®, Oracle, MS SQL, and MySQL) and GUIs (X11, Microsoft® windows®, Java(TM), HTML, WML, and XML) with minimal effort. which you could write functions once and installation them any place, without the deserve to recompile for distinctive working methods (UNIX®, Linux, and Microsoft windows NT®).
using company evolution Suite, organizations and impartial application providers (ISVs) can raise productiveness and beef up their investments in existing 4GL enterprise first-rate judgment, enabling them to tackle modern user needs and market alternatives at a inexpensive.
The products in this announcement are available as portion of the IBM Developer revenue Channel software Remarketing software. Product counsel has been provided by means of the application employer, 4 J's structure equipment, LTD.
Key PrerequisitesUNIX, Microsoft windows 2000 Server, XP, AIX® 5.X or Linux 7.x and eight.x
Availability DateJuly 8, 2003
DescriptionFour J's traffic construction Suite is the quickest solution to attain windows, the web, and mobile gadgets for existing and modern 4GL applications.
while conserving investments in 4GL source code, structure staff, and consumer training, enterprise structure Suite allows builders to open purposes seamlessly to a big selection of latest graphical computing environments. Its three-tier, thin-customer structure presents unmatched software performance and scalability with server assist for windows NT, Linux, and UNIX platforms.
With four J's Open Database Interface (ODI), connectivity is supplied to database servers such as DB2, Informix, and different database servers through a library of aboriginal database drivers.
Thomas trade update
live up up to now on traffic word and developments, product bulletins and the newest improvements.
at the possibility of over simplification, I believe that a "contemporary software" can be illustrated with the assist of the photograph in determine 1. For the most half, when legacy purposes are mentioned, one usually thinks of monolithic purposes that were written in older programming languages,. An instance of here's COBOL, which is a terminal-based mostly consumer interfaces that always uses records retailers comparable to ISAM, flat data, and proprietary database management techniques. The left most bottom of the diagram shows this type of utility. as the diagram demonstrates, software architectures bask in evolved into internet and cell user.
determine 1 - simultaneous utility
Interfaces that will besides be loosely coupled with exterior applications are sometimes based within the cloud. This diagram doesn't parade that applications developed today are most frequently capable of be hosted on virtualized servers and/or in containers. The diagram additionally does not exhibit that purposes developed today are developed with more moderen programming languages and with a brace of diverse database technologies.
This dichotomy between legacy functions — both from a function, usability, can charge, and relative issue perspectives — supply increasingly efficacious motivations for stakeholders to replace and modernize these legacy functions.
what's the CUBA-Platform?
The CUBA-Platform provides a full-stack architecture for constructing three tier functions. It contains prevalent facets for traffic apps, equivalent to tender deletion, facts-aware accessories, file storage, and inordinate plane modules, together with authentication, authorization, audit of information, and others. This class is most applicable for constructing ERP-like systems, line of enterprise functions, or custom utility for the company phase.
On the floor, the CUBA-Platform seems to be in particular applicable to structure custom purposes from scratch. despite the fact, a better seem reveals a platform that provides the ability to reuse present databases, auto generate domain fashions from latest databases, instantly create relaxation APIs from present artifacts, standardize entrance-conclusion by using prebuilt responsive UI templates, revolve present enterprise logics into regular functions, and, lastly, combine any leisure primarily based third-birthday party functions without coding. These aspects originate the CUBA-Platform benchmark for the mixing of a plenary stack Java framework with legacy functions.
What Are TransformixTools?
TransformixTools for CUBA-Platform are a number of customized engineering add-ons and adapters that link legacy applications to the CUBA Platform. amongst these are database adapters, terminal monitor adapters, COBOL capabilities integration add-ons, and Eclipse plugins. These tools role CUBA-Platform plugins to facilitate the combination of the legacy application to CUBA points.
For the stakeholders of legacy applications for traffic shoppers, ModerinzationInPlace™ is an creative strategy to software construction and efficacious open supply know-how that helps builders integrate present legacy purposes with the entire stack CUBA-Platform traffic evolution framework. This non-invasive mode transforms the software into a multi-mannequin evolution platform. existing tools can besides be used to lengthen and raise present legacy software code, whereas, on the same time, modern evolution apparatus can be used to enlarge and prolong application functionality. therefore, ModernizationInPlace™ makes customizations and improvements to the software performance tremendously painless.
ModernizationInPlace™ is a framework for reinforcing the utility's enterprise layer (with internet provider APIs) and database
equipment from Transformix enable the application person interface to be supplemented with browser entry that enables combining present internal applications displays, devotion Legacy applications (mainframe eco-friendly screen purposes), with exterior internet capabilities and internet pages with ordinary sites designed with out integration interfaces (APIs), XML assistance, and databases.
The CUBA-Platform is an open source, plenary stack Java framework that provides an open source basis.
according to a Java know-how stack, here's compiled of the most fulfilling practices for designing a traffic software's database, traffic layer kick mannequin, and net API
There is not any hidden magic; the generated server software is an everyday leisure net service that can be debugged the usage of its supply and the typical Java IDE's.
toward the Multi-model functions Platform
figure 2 - Multi-mannequin functions Platform
yes, Virginia. it's viable to bask in your cake and eat it too, at least, in so far as legacy purposes are involved. by that, I imply it is workable to permit for continuing construction within the legacy paradigm in parallel with evolution in more recent paradigms. determine 2 illustrates an environment in which an software become built for an HP 3000 in COBOL with a proprietary HP TurboIMAGE database administration device that has been migrated to Linux with a PostgreSQL RDBMS. here is performed with best minimal alterations to utility sources. during this atmosphere, the COBOL functions nonetheless employ the identical APIs they used on the HP 3000. as an example, database calls are TurboIMAGE calls and monitor IO calls are VPLUS calls. besides the fact that children, the employ of the aggregate of the CUBA-Platform with the TransformixTools enhancements makes it workable to disclose the terminal based mostly user interface in an internet browser and the database may besides be accessed using SQL. hence, at the identical time that the legacy courses are used, the software can be more suitable in the same manner as a newly developed Java-primarily based CUBA application is better. furthermore, the developers who toil on the software as a CUBA utility don't deserve to bask in an HP 3000 abilities or talents to achieve their jobs.
five Steps to ModernizationInPlace™
determine three provides a inordinate stage overview of how the multi-mannequin purposes platform is carried out. A SQL purchasable database is needed to be able to rear plenary competencies of the aspects the CUBA-Platform has to offer. hence, the first step is emigrate the utility facts access to enable for multi-mannequin SQL entry. This skill that the customary application will still be able to access the records the employ of the habitual APIs, whereas, at the equal time, different functions, comparable to CUBA, should be in a position to employ SQL to entry that same facts. Step two is to permit browser entry to the software screens. in this 2d step, it additionally contains the installing of the CUBA-Platform alongside the software. The application takes on the qualities of a multi-mannequin utility once the CUBA-Platform is installed. This capability that from then on the utility can besides be extended and more advantageous with simultaneous apparatus through developers with cramped or no competencies of the legacy programming environment.
below is an improved edition of the 5 steps in opposition t creating a multi-mannequin applications platform.
step one: A Multi-model records Platform
A established "trick" in migrations is to provide a simulated legacy device API on exact of a relational database. This makes it workable for the existing software to entry the statistics the usage of the equal database calls or APIs. at the same time, this provides selection trade ordinary interfaces to newer and commercially available off-the-shelf applications. here's the mode Transformix makes employ of. listed below are some examples:
HP 3000 TurboIMAGE or Eloquence Database to RDBMS
TransformixTools gives a TurboIMAGE API that allows functions that were at first written for the HP 3000 to bask in the facts and schema's migrated to Oracle, PostgreSQL, MSSQL, IBM DB2, or IBM Informix with few or no alterations to the utility classes. Then, other purposes can access the statistics the usage of benchmark APIs reminiscent of SQL.
MS entry to RDBMS
Microsoft access allows you to with ease create databases to rescue and current your facts in forms and stories. When starting, a database may be very fundamental and trivial, however, over time, it might revolve into extra essential as you add facts, points, and even participate it with others. It gains a lifetime of its own and the habitual design becomes critical.
determine 3 - ModernizationInPlace 5 Steps
one of the vital essential architectural designs is splitting the database birthright into a front-end and lower back-conclusion database. here is how access is designed to let you embolden multi-user databases and significantly simplify how you raise the software over time.
keeping apart your application and facts databases allows for you to back distinct clients and upgrade the utility without wiping out their statistics. Assuming the utility doesn't change that often, the separation additionally makes it more straightforward to simply backup the facts database seeing that simplest it truly is changing every day.
Splitting a database is a relatively elementary conception. you're taking an current entry MDB/ACCDB database with its tables, queries, kinds, reviews, macros, modules, and so on. and divide it into two databases:
The "lower back-end" database that just contains the tables
The "entrance-end" database that contains the utility objects (every cramped thing apart from the tables) and hyperlinks to the tables in the again-conclusion database
This design is peculiarly positive in multi-consumer environments where the back-end database is stored on a community and consists of the shared information. each person then has a duplicate of the front-conclusion database on their laptop pointing to the shared database.
In multi-person environments, the front-end database can additionally accommodate tables which are inner most to the user. These local tables can store the person's settings, selections, temporary or intermediate tables for processing facts or reviews, and so forth.
once the database is split, using ODBC to entry it from MS entry and the usage of MS access as a frontend makes it workable for the backend to be accessed with the CUBA-Plaform.
Microfocus ISAM to Ctree
FairCom's No+SQL technology provides flexibility with an ISAM utility's data structure with the aid of allowing information ISAM of any class to be kept within your listing structure, with nonexistent pre-described schemas. at the same time, it supports trade-normal SQL (relational) interfaces and excessive-efficiency NoSQL (non-relational) interfaces to the identical facts on the same time.
c-treeACE is an ANSI-compliant SQL database with sheperd for every thing you foretell from an RDBMS, together with kept tactics, triggers, user-defined capabilities, ODBC, JDBC, and a wealth of regular interfaces. c-treeACE offers simultaneous access to the identical facts by means of NoSQL interfaces for the top of the line in efficiency.
TransformixTools gives a CUBA-Platform interface to C-tree SQL.
Informix 4GL to Aubit4gl and RDBMS
once the database is in the RDBMS CUBA-Platform, it can besides be used to prolong and boost the application.
Step Two: Browser UI
TransformixTools gives options based on the CUBA-Platform and Vaadin that flip legacy utility user interfaces into browser-primarily based interfaces.
Our terminal emulation solution provides an instant internet browser based terminal emulator to key enterprise techniques, including UNIX or a VMS gadget on any device with zero client application installing. This may be centrally managed. The Transformix reply is based on the CUBA-Platform. for this reason, at this step, the CUBA-Platform is installed and made accessible to the utility developers.
VPLUS API Intercept
one more approach they employ is the terminal API intercept method. The greatest instance is their VPDM HP VPlus alternative. They transform the HP VPLUS kinds file to Java courses and create an xmlrpc-based mostly intercept library that implements a plug-appropriate replacement for VPLUS calls.
MS access kinds
This reply is in line with the CUBA-Platform, as smartly. The TransformixTools DBForms reply comprises software apparatus that revolve MS access forms to internet pages written in Java code and is purchasable for viewing via your cyber web browser. A prerequisite for this is to point to MS access tables and queries into their revolve and transform them to RDBMS. For now, this solution is proscribed to PostgreSQL.
Step Three: better Browser
A composite utility (also known as a "Mashup") is a website portion or application that displays blended content mixed from heterogeneous sources. conclusion-users shouldn't bask in to understand which underlying sources and purposes this aggregated information is coming. In its easiest implementation, adding fantastically simple exterior enhancements to a legacy user interface, equivalent to dropdowns or a kind-ahead search, can significantly enhance the consumer journey with the software. These two features require database access this is reduce lax the habitual utility and that they can besides be implemented devoid of editing the habitual software. determine 4 indicates what the user sees on their laptop and is a further composite of the common utility reveal. On amend of that, a Google Map is made attainable via a leisure API and the CUBA-Platform. This, too, doesn't require a modification of the long-established utility.
determine 4 - Composite utility monitor
the employ of the CUBA-Platform in Step Two is not only a improvement for growing the browser UI within the first area; it besides makes it feasible to lengthen and boost the software from the user's point of view devoid of changing the customary application.
Step four: mobile and internet functions
The CUBA-Platform become delivered to the utility environment in Step Two as a vehicle to facilitate improving the user interface to the utility. Step Three gave us the probability to explore how CUBA can aid additional enhance consumer interfaces. In Step 4, they start to seem at the actual power of the platform. It gives a no Code and Low Code Platform that allows you to reshape the artery you engage together with your legacy UNIX or VMS equipment, as well as your home windows, Linux, or MAC system. With legacy terminal based functions, we've noticed that it gives us tools to embolden trade green monitor user experiences into simultaneous interfaces which are delivered over the internet. This offers you the license to fitting and evolve enterprise methods, birthright now realizing modern efficiencies and gaining snappily ROI and tactical merits which are with no mischance not obtainable in different places. What's greater, this can be finished by means of a brilliant user or national Developer.
relaxation APIs are total of the rage this present day. the employ of leisure and other HTTP(S) primarily based APIs bask in become the lingua franca of the zone of computing. The CUBA-Platform is built on excellent of leisure APIs and it plays very smartly with leisure APIs provided by others. the employ of CUBA as a modernization groundwork for legacy systems transforms your host atmosphere birthright into a dynamic element of your enterprise techniques interface layer, which is invariably restrained to the transaction layer of the commercial enterprise. These modern apparatus will unleash the funding for your host device to freely interact with and feed tertiary company programs, expanding the availability, timeliness, and integrity of vital company facts.
a bit of more About developing With the CUBA-Platform
At its highest stage, the CUBA-Platform includes the design time CUBA Studio, which works in concert with both Intellij conception IDE or Eclipse IDE. At runtime, it makes employ of a Java utility server, continually, Apache Tomcat.
figure 5 - CUBA inordinate stage Overview
The CUBA Studio is a specialized tool for swift software evolution that streamlines constructing purposes upon CUBA Platform. With Studio, functions are up and operating within minutes. It additionally hurries up modernizing legacy purposes by scaffolding the records mannequin and CRUD UI on precise of an current database.
Studio is designed for employ in parallel with a Java IDE (figure 6) , so builders won't bask in to abandon their beloved working environments. The focal element of the construction mode is the studio. projects are open in Studio and many of the configuration and enhancement is managed with Studio at the side of the IDE. additionally, trying out and debugging are managed through Studio as smartly.
figure 6 - Studio with IDE
purposes developed using the CUBA-Platform occupy three tiers as proven in determine 7. they are the database tier, the headquarters tier, and the customer tier. These tiers are linked the employ of relaxation and HTTP APIs.
determine 7 - CUBA lofty degree utility architecture
using this structure, the same backend can besides be used for net, desktop, mobile, and relaxation API functions.
Step five: Loosely Coupled web services
one of the crucial necessary ideas on the planet of utility engineering is the concept of free coupling. In a loosely coupled design, add-ons are impartial and changes in a single will not touch the operation of others. This mode offers choicest flexibility and reusability when components are brought, changed, or modified. add-ons that may operate independently and bask in a smartly-defined conversation channel are loosely coupled.
The architecture of the CUBA-Platform is built to back this lax coupling of add-ons. for this reason, when legacy functions are built-in with the CUBA-Platform, it makes it workable for their facets and components to be used with the equal flexibility as more lately developed software add-ons.
ModernizationInPlace™ is the Transformix computing device enterprise approach for changing legacy applications into future-proof traffic functions with the CUBA-Platform. This approach helps agencies create multi-model purposes structures that permit legacy purposes and utility extensions written in the CUBA-Platform (offered by means of a plenary stack Java framework) to toil aspect-by using-side. using this strategy, the prominent benefits of application modernization are achieved birthright now and at low chance.
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Informix Genero, a modern IBM offering developed under partnership with Four Js evolution Tools, is a analytic enhancement to the Informix 4GL language and environment that offers extensive capabilities for developing modern web and desktop GUI applications, reports, and web services.
Looking for a quick, cost-effective alternative to rewriting IBM Informix 4GL applications? With IBM Informix Genero, users can recompile 4GL applications and elope them as GUI and web applications while retaining the traffic logic. Converted applications are ready to deploy on various platforms, in most cases with no code modification and very cramped testing. It allows users to leverage their skill foundation to update "green screen" applications and enhance the graphical interface over time, total while the applications remains available.
ASuperset of Informix 4GL
Informix Genero is a superset of Informix 4GL. Because virtually total 4GL syntax and semantics exist in Informix Genero, the Informix Genero compiler can recompile the 4GL source code. In confident situations, the Genero compiler is stricter than the 4GL compiler, but any changes required for the Genero compiler are besides cogent for the 4GL compiler. Once the 4GL source code is recompiled with the Genero compiler, it can then be elope using the various Informix Genero runtime system options. Because the 4GL source code remains unchanged, the testing distress required to vein modernized applications into production is greatly reduced.
After recompilation, the resulting GUI or web application can rear advantage of wealthy user-interface components while leveraging the underlying 4GL traffic logic. And, because the converted application is still fully functional and usable after complication, pull-down menus, toolbars, actual dialog boxes, and other commonly used GUI controls can be phased in over time, and the modern application can be immediately available to the user community. Users can interact with the application using the same keyboard-based controls, role keys, default menus, and other basic controls that were defined for 4GL.
Modernizing Versus Converting to Java
Let's respect an example of a typical Informix 4GL application suite consisting of
242 separately compiled 4GL programs
1522 4GL source-code modules
596 screens (4GL forms)
575 KLOC of 4GL source code
This application provides data-entry and data-maintenance operations through a character-based interface, and has some batch-updating and reporting functions. The application contains 596 screens, of which 250 (~40%) are used for internal data maintenance and housekeeping operations. The remaining 346 screens are available to the user for data entry, but only about 100 of those screens are used frequently.
Converting the original application to Java would be an "all or nothing approach," at least with respect to leveraging the original 4GL source code. The entire application would bask in to be rewritten. Assuming approximately 160 lines of code per day (based on the Gartner Group1 estimates for code modernization), the coding distress for this project could be substantial: over 160 person months. Assuming that modern code written in Java has an error rate of approximatley 61 defects per 1000 lines of code2, additional distress would requisite to be spent debugging and fixing potentially as many as 35K errors. Also, because the modern application would be entirely modern Java logic, a complete testing and certification process would requisite to be performed, as with any other modern application.
Modernizing the original application with Informix Genero would reuse the 4GL source code. The 4GL source code would be recompiled with the Informix Genero compiler so that the application could elope on various types of parade clients. The compiler path in the build file could easily be changed to compile the Genero applications in the same build environment. There would likely be a few minor differences between the 4GL and Genero compilers and there would be changes needed for dealing with external C code. After any required changes would be made, the Genero application would be able to elope in text mode, just devotion the original Informix 4GL application.
Configuring the Informix Genero Desktop Client would allow the Genero application to be rendered in GUI mode on Windows, Linux, and Mac operating systems. Creating a diminutive XML configuration file for the Informix Genero Application Server would allow the same application to be rendered in web browsers. Testing the application could open immediately. Because this application would be using the existing 4GL syntax and semantics, the functional and verification testing would require substantially less distress than for a modern Java-based application.
The distress to enhance this application would requisite to focus only on the graphical user interface of the 100 screens that are -used frequently for data entry. The underlying logic could be left largely unchanged. The other 246 screens that are presented to the user could be deployed in a phased approach, perhaps 50 screens a month over a five-month period. The remaining 250 screens (and the underlying logic) could be left unchanged because they would be used infrequently by internal staff. Less distress would be spent on testing and the certification for the Informix Genero project than for the Java project.
The Bottom Line
Converting the Informix 4GL application to Java would rear significant time and be expensive. The compatibility between Informix Genero and Informix 4GL saves time and money by leveraging the underlying traffic logic of the existing application. Informix Genero minimizes initial costs and efforts, and allows the graphical user interface to be enhanced over time while the application remains available to the user community.
1Gartner Group, "Forecasting the Worldwide IT Services Industry: 1999"
2Geoffrey Phipps, "Comparing observed bug and productivity rates for Java and C++," Software-Practice & Experience, v.29(4), p.345-358, 1999
About the author:
Shawn Moe is a software architect at IBM, focusing on UI modernization, SQL compatibility, application development, and tooling back for the Informix database servers. For more information, evaporate to www-01.ibm.com/software/data/informix.
Four J's traffic evolution Suite offers graphical evolution tool for Informix 4GL users. While preserving investments in 4GL source code, it enables developers to open applications seamlessly to wide variety of graphical computing environments. It provides N-tier thin client architecture and scales to thousands of users simultaneously. Users can write applications once and deploy anywhere, without recompilation for different operating systems.
Original Press Release:
Four J's traffic evolution Suite Offers a Graphical evolution tool for Informix 4GL Users
At a GlanceFour J's traffic evolution Suite:o Enables applications to elope across heterogeneous client, database, and operating system environments for a single source code across the intranet and the Interneto Improves developer productivity by structure on existing 4GL traffic logico Develops purpose-built traffic applications alternative to J2EE, EJB, .Neto Enables you to write once and deploy anywhere, without recompilationo Allows projects to be completed on time and within budget while focusing on the traffic logic rather than the infrastructureo Provides N-tier thin client architecture and scales to thousands of users simultaneously
OverviewFour J's is known within the Informix(TM) community as the author of Informix Dynamic 4GL, a graphical evolution tool for Informix 4GL (I-4GL) users.
The traffic evolution Suite brings modern value to traffic applications written in I-4GL or Dynamic 4GL (D4GL). This robust and scalable application server platform accesses multiple databases (Informix, DB2®, Oracle, MS SQL, and MySQL) and GUIs (X11, Microsoft® Windows®, Java(TM), HTML, WML, and XML) with minimal effort. You can write applications once and deploy them anywhere, without the requisite to recompile for different operating systems (UNIX®, Linux, and Microsoft Windows NT®).
Using traffic evolution Suite, enterprises and independent software vendors (ISVs) can enlarge productivity and strengthen their investments in existing 4GL traffic logic, enabling them to address modern user needs and market opportunities at a low cost.
The products in this announcement are available as a portion of the IBM Developer Sales Channel Software Remarketing program. Product information has been provided by the program supplier, Four J's evolution Tools, LTD.
Key PrerequisitesUNIX, Microsoft Windows 2000 Server, XP, AIX® 5.X or Linux 7.x and 8.x
Availability DateJuly 8, 2003
DescriptionFour J's traffic evolution Suite is the fastest artery to gain Windows, the Internet, and mobile devices for existing and modern 4GL applications.
While preserving investments in 4GL source code, evolution staff, and user training, traffic evolution Suite enables developers to open applications seamlessly to a wide variety of modern graphical computing environments. Its three-tier, thin-client architecture offers unmatched application performance and scalability with server back for Windows NT, Linux, and UNIX platforms.
With Four J's Open Database Interface (ODI), connectivity is provided to database servers such as DB2, Informix, and other database servers through a library of aboriginal database drivers.
Thomas Industry Update
Stay up to date on industry word and trends, product announcements and the latest innovations.
At the risk of over simplification, I believe that a "modern application" can be illustrated with the embolden of the image in motif 1. For the most part, when legacy applications are mentioned, one usually thinks of monolithic applications that were written in older programming languages,. An example of this is COBOL, which is a terminal-based user interfaces that usually uses data stores such as ISAM, flat files, and proprietary database management systems. The left most bottom of the diagram shows this type of application. As the diagram demonstrates, application architectures bask in evolved into web and mobile user.
Figure 1 - Modern Application
Interfaces that can be loosely coupled with external applications are often based in the cloud. This diagram does not point to that applications developed today are most often able to be hosted on virtualized servers and/or in containers. The diagram besides does not point to that applications developed today are developed with newer programming languages and with a number of different database technologies.
This dichotomy between legacy applications — both from a feature, usability, cost, and relative hardship perspectives — provide increasingly tough motivations for stakeholders to replace and modernize these legacy applications.
What Is the CUBA-Platform?
The CUBA-Platform provides a full-stack architecture for structure three tier applications. It includes widely used features for enterprise apps, such as soft deletion, data-aware components, file storage, and lofty plane modules, including authentication, authorization, audit of data, and others. This class is most arrogate for developing ERP-like systems, line of traffic applications, or custom software for the corporate segment.
On the surface, the CUBA-Platform seems to be mainly suited to structure custom applications from scratch. However, a closer behold reveals a platform that provides the ability to reuse existing databases, auto generate domain models from existing databases, automatically create leisure APIs from existing artifacts, standardize front-end by using prebuilt responsive UI templates, revolve existing traffic logics into benchmark services, and, lastly, integrate any leisure based third-party services without coding. These features originate the CUBA-Platform well suited for the integration of a plenary stack Java framework with legacy applications.
What Are TransformixTools?
TransformixTools for CUBA-Platform are a number of custom engineering components and adapters that link legacy applications to the CUBA Platform. Among these are database adapters, terminal screen adapters, COBOL services integration components, and Eclipse plugins. These tools serve as CUBA-Platform plugins to facilitate the integration of the legacy application to CUBA features.
What is ModernizationInPlace™
For the stakeholders of legacy applications for enterprise customers, ModerinzationInPlace™ is an innovative approach to software evolution and efficient open source technology that helps developers integrate existing legacy applications with the plenary stack CUBA-Platform enterprise evolution framework. This non-invasive approach transforms the application into a multi-model evolution platform. Existing tools can be used to extend and enhance existing legacy application code, while, at the same time, modern evolution tools can be used to enhance and extend application functionality. Therefore, ModernizationInPlace™ makes customizations and upgrades to the application functionality relatively painless.
ModernizationInPlace™ is a framework for enhancing the application's traffic layer (with web service APIs) and database
Tools from Transformix allow the application user interface to be supplemented with browser access that allows combining existing internal applications screens, devotion Legacy applications (mainframe green screen applications), with external Web services and Web pages with benchmark websites designed without integration interfaces (APIs), XML information, and databases.
The CUBA-Platform is an open source, plenary stack Java framework that provides an open source foundation.
Based on a Java technology stack, this is compiled of the best practices for designing a traffic application's database, traffic layer kick model, and Web API
There is no hidden magic; the generated server application is a regular leisure Web service that can be debugged using its source and the well-liked Java IDE's.
Toward the Multi-model Applications Platform
Figure 2 - Multi-model Applications Platform
Yes, Virginia. It is workable to bask in your cake and eat it too, at least, in so far as legacy applications are concerned. By that, I add up to it is workable to allow for continuing evolution in the legacy paradigm in parallel with evolution in newer paradigms. motif 2 illustrates an environment in which an application was built for an HP 3000 in COBOL with a proprietary HP TurboIMAGE database management system that has been migrated to Linux with a PostgreSQL RDBMS. This is done with only minimal changes to application sources. In this environment, the COBOL applications still employ the same APIs they used on the HP 3000. For example, database calls are TurboIMAGE calls and screen IO calls are VPLUS calls. However, using the combination of the CUBA-Platform with the TransformixTools enhancements makes it workable to point to the terminal based user interface in a Web browser and the database can be accessed using SQL. Therefore, at the same time that the legacy programs are used, the application can be enhanced in the same artery as a newly developed Java-based CUBA application is enhanced. Furthermore, the developers who toil on the application as a CUBA application achieve not requisite to bask in an HP 3000 scholarship or skills to achieve their jobs.
Five Steps to ModernizationInPlace™
Figure 3 provides a lofty plane overview of how the multi-model applications platform is implemented. A SQL accessible database is needed in order to rear plenary advantage of the features the CUBA-Platform has to offer. Therefore, the first step is to migrate the application data access to allow for multi-model SQL access. This means that the original application will still be able to access the data using the original APIs, while, at the same time, other applications, such as CUBA, will be able to employ SQL to access that same data. Step two is to allow browser access to the application screens. In this second step, it besides includes the installation of the CUBA-Platform alongside the application. The application takes on the characteristics of a multi-model application once the CUBA-Platform is installed. This means that from then on the application can be extended and enhanced with modern tools by developers with cramped or no scholarship of the legacy programming environment.
Below is an expanded version of the five steps towards creating a multi-model applications platform.
Step One: A Multi-model Data Platform
A commonly used "trick" in migrations is to provide a simulated legacy system API on top of a relational database. This allows the existing application to access the data using the same database calls or APIs. At the same time, this provides alternative industry benchmark interfaces to newer and commercially available off-the-shelf applications. This is the approach Transformix uses. Here are some examples:
HP 3000 TurboIMAGE or Eloquence Database to RDBMS
TransformixTools provides a TurboIMAGE API that allows applications that were originally written for the HP 3000 to bask in the data and schema's migrated to Oracle, PostgreSQL, MSSQL, IBM DB2, or IBM Informix with few or no changes to the application programs. Then, other applications can access the data using benchmark APIs such as SQL.
MS Access to RDBMS
Microsoft Access lets you easily create databases to store and present your data in forms and reports. When starting, a database may be very simple and trivial, but, over time, it may become more necessary as you add data, features, and even participate it with others. It gains a life of its own and the overall design becomes critical.
Figure 3 - ModernizationInPlace 5 Steps
One of the most necessary architectural designs is splitting the database into a front-end and back-end database. This is how access is designed to let you back multi-user databases and significantly simplify how you enhance the application over time.
Separating your application and data databases enables you to back multiple users and upgrade the application without wiping out their data. Assuming the application doesn't change that often, the separation besides makes it easier to just backup the data database since only that is changing every day.
Splitting a database is a relatively simple concept. You rear an existing Access MDB/ACCDB database with its tables, queries, forms, reports, macros, modules, etc. and divide it into two databases:
The "Back-End" database that just contains the tables
The "Front-End" database that contains the application objects (everything except the tables) and links to the tables in the back-end database
This design is especially useful in multi-user environments where the back-end database is stored on a network and contains the shared data. Each user then has a copy of the front-end database on their desktop pointing to the shared database.
In multi-user environments, the front-end database can besides accommodate tables that are private to the user. These local tables can store the user's settings, selections, temporary or intermediate tables for processing data or reports, etc.
Once the database is split, using ODBC to access it from MS Access and using MS Access as a frontend allows the backend to be accessed with the CUBA-Plaform.
Microfocus ISAM to Ctree
FairCom's No+SQL technology provides flexibility with an ISAM application's data architecture by allowing data ISAM of any type to be stored within your record structure, without any pre-defined schemas. At the same time, it supports industry-standard SQL (relational) interfaces and high-performance NoSQL (non-relational) interfaces to the same data at the same time.
c-treeACE is an ANSI-compliant SQL database with back for everything you expect from an RDBMS, including stored procedures, triggers, user-defined functions, ODBC, JDBC, and a wealth of benchmark interfaces. c-treeACE provides simultaneous access to the same data via NoSQL interfaces for the ultimate in performance.
TransformixTools provides a CUBA-Platform interface to C-tree SQL.
Informix 4GL to Aubit4gl and RDBMS
Once the database is in the RDBMS CUBA-Platform, it can be used to extend and enhance the application.
Step Two: Browser UI
TransformixTools provides solutions based on the CUBA-Platform and Vaadin that revolve legacy application user interfaces into browser-based interfaces.
Our terminal emulation solution provides an instant Web browser based terminal emulator to key traffic systems, including UNIX or a VMS system on any device with zero client software installation. This will be centrally managed. The Transformix solution is based on the CUBA-Platform. Therefore, at this step, the CUBA-Platform is installed and made available to the application developers.
VPLUS API Intercept
Another technique they employ is the terminal API intercept approach. The best example is their VPDM HP VPlus replacement. They transform the HP VPLUS forms file to Java classes and create an xmlrpc-based intercept library that implements a plug-compatible replacement for VPLUS calls.
MS Access Forms
This solution is based on the CUBA-Platform, as well. The TransformixTools DBForms solution includes software tools that revolve MS Access forms to Web pages written in Java code and is available for viewing through your Internet browser. A prerequisite for this is to revolve MS Access tables and queries into their revolve and transform them to RDBMS. For now, this solution is limited to PostgreSQL.
Step Three: Enhanced Browser
A composite application (also known as a "Mashup") is a website component or application that displays mixed content combined from heterogeneous sources. End-users don't bask in to know which underlying sources and applications this aggregated information is coming. In its simplest implementation, adding relatively simple external enhancements to a legacy user interface, such as dropdowns or a type-ahead search, can greatly enhance the user smack with the application. These two features require database access that is divorce from the original application and they can be implemented without modifying the original application. motif 4 shows what the user sees on their desktop and is a further composite of the original application screen. On top of that, a Google Map is made available through a leisure API and the CUBA-Platform. This, too, does not require a modification of the original application.
Figure 4 - Composite Application Screen
The employ of the CUBA-Platform in Step Two is not only a capitalize for creating the browser UI in the first place; it besides makes it workable to extend and enhance the application from the user's point of view without changing the original application.
Step Four: Mobile and Web Services
The CUBA-Platform was introduced to the application environment in Step Two as a vehicle to facilitate enhancing the user interface to the application. Step Three gave us the opportunity to explore how CUBA can embolden further enhance user interfaces. In Step Four, they open to behold at the actual power of the platform. It provides a no Code and Low Code Platform that allows you to reshape how you interact with your legacy UNIX or VMS system, as well as your Windows, Linux, or MAC system. With legacy terminal based applications, they bask in noticed that it gives us tools to embolden change green screen user experiences into simultaneous interfaces that are delivered over the web. This gives you the license to fitting and evolve traffic processes, quickly realizing modern efficiencies and gaining instant ROI and tactical advantages that are simply not available elsewhere. What's more, this can be done by a super user or national Developer.
REST APIs are total the rage these days. The employ of leisure and other HTTP(S) based APIs bask in become the lingua franca of the world of computing. The CUBA-Platform is built on top of leisure APIs and it plays very well with leisure APIs provided by others. The employ of CUBA as a modernization foundation for legacy systems transforms your host environment into a dynamic component of your traffic systems interface layer, which is normally confined to the transaction layer of the enterprise. These modern tools will unleash the investment in your host system to freely interact with and feed tertiary traffic systems, increasing the availability, timeliness, and integrity of necessary traffic data.
A Bit More About Developing With the CUBA-Platform
At its highest level, the CUBA-Platform consists of the design time CUBA Studio, which works in concert with either Intellij blueprint IDE or Eclipse IDE. At runtime, it uses a Java application server, usually, Apache Tomcat.
Figure 5 - CUBA lofty plane Overview
The CUBA Studio is a specialized tool for rapid application evolution that streamlines structure applications upon CUBA Platform. With Studio, applications are up and running within minutes. It besides accelerates modernizing legacy applications by scaffolding the data model and CRUD UI on top of an existing database.
Studio is designed to be used in parallel with a Java IDE (Figure 6) , so developers achieve not bask in to abandon their beloved working environments. The focal point of the evolution process is the studio. Projects are open in Studio and most of the configuration and enhancement is managed with Studio in conjunction with the IDE. Moreover, testing and debugging are managed through Studio as well.
Figure 6 - Studio with IDE
Applications developed using the CUBA-Platform occupy three tiers as shown in motif 7. They are the database tier, the middle tier, and the client tier. These tiers are connected using leisure and HTTP APIs.
Figure 7 - CUBA lofty plane Application Architecture
Using this architecture, the same backend can be used for Web, desktop, mobile, and leisure API applications.
Step Five: Loosely Coupled Web Services
One of the most necessary ideas in the world of software engineering is the concept of lax coupling. In a loosely coupled design, components are independent and changes in one will not touch the operation of others. This approach offers optimal flexibility and reusability when components are added, replaced, or modified. Components that can operate independently and bask in a well-defined communication channel are loosely coupled.
The architecture of the CUBA-Platform is built to back this lax coupling of components. Therefore, when legacy applications are integrated with the CUBA-Platform, it allows their features and components to be used with the same flexibility as more recently developed application components.
ModernizationInPlace™ is the Transformix Computer Corporation approach for converting legacy applications into future-proof enterprise applications with the CUBA-Platform. This approach helps organizations create multi-model applications platforms that allow legacy applications and application extensions written in the CUBA-Platform (provided by a plenary stack Java framework) to toil side-by-side. Using this approach, the sought after benefits of application modernization are achieved quickly and at low risk.
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