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000-267 exam Dumps Source : AS/400 RPG IV Developer
Test Code : 000-267
Test title : AS/400 RPG IV Developer
Vendor title : IBM
: 121 true Questions
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IBM AS/400 RPG IV Developer
February eleven, 2019 Timothy Prickett Morgan
If nothing else, the IBM i platform has exhibited surprising longevity. One could even notify legendary durability, in case you want to prefer its history All of the way back to the gadget/3 minicomputer from 1969. this is the actual nascence point in the AS/four hundred family unit tree and here is when large Blue, for terribly sound legal and technical and advertising and marketing causes, decided to fork its products to tackle the pleasing needs of gargantuan agencies (with the system/360 mainframe and its observe-ons) and diminutive and medium groups (starting with the gadget/3 and relocating on through the equipment/34, system/32, device/38, and equipment/36 in the Seventies and early Eighties and passing throughout the AS/400, AS/400e, iSeries, device i, and then IBM i on vim methods platforms.
It has been an extended sprint indeed, and many customers who've invested within the platform began manner back then and there with the early versions of RPG and moved their purposes ahead and altered them as their businesses evolved and the depth and breadth of company computing changed, poignant on up through RPG II, RPG III, RPG IV, ILE RPG, and now RPG free form. Being on this platform for even three a long time makes you a relative newcomer.
there is an extended sprint forward, for the understanding that they accord with that the groups which are nonetheless working IBM i techniques are the true diehards, the ones who don't contain any goal of leaving the platform and that, at least in accordance with the survey data they now contain been privy too, are aspiring to continue investing in, or even expand their investments in, the IBM i platform.
so far, they are not in a recession and heaven inclined there aren't one, so the priorities that IBM i retail outlets contain don't look to live the ones that they'd a decade in the past All over the peak of the terrific Recession. again then, as become the case in practically All IT businesses, IBM i retail outlets were hunkering down and contain been trying to gash costs in All methods viable, including deferring device upgrades and migrations in addition to slicing lower back on other tasks. simplest 29 % of the 750 IBM i retail outlets that participated within the 2019 IBM i marketplace Survey, which HelpSystems did lower back in October 2018, contain been involved about reducing IT spending. this is a remarkably low degree, and that i assume is indicative of how pretty robust the economic system is – excepting one of the suits and starts they noticed on the intermission of 2018 and perquisite here in early 2019 that beget us nervous and will nascence putting pressure on issues. listed here are the properly concerns as culled from the survey:
dealing with the boom in facts and in deciding the analytics to gnaw on that information ranked a bit bit higher on the 2019 IBM i industry Survey than did reducing charges, and i believe over the lengthy haul these considerations will eddy into more essential than modernizing applications and dealing with the IBM i expertise shortages which are a perennial live concerned. both of these considerations are being solved as novel programmers and novel gear to beget novel interfaces to database purposes contain become greater common and as applied sciences similar to free figure RPG, which appears greater dote Java, Python, and Hypertext Preprocessor, are being greater broadly deployed and, importantly, can also live picked up greater rapidly with the aid of programmers experienced with these different languages.
Given the character of the consumer base, it appears not going to me that security and unreasonable availability will no longer continue to live fundamental considerations, however that the IBM i platform is among the most relaxed structures on the earth (and never just because it is obscure, but because it is exceedingly problematic to hack) and it has a number of high availability and catastrophe recovery tools (from IBM, Syncsort, Maxava, and HelpSystems) accessible for those that want to double up their techniques and give protection to their applications and statistics. The bar is commonly larger than primary backup and recuperation for many IBM i shops in the banking, insurance, manufacturing, and distribution industries that dominate the platform. These companies can’t contain protection breaches, and that they can’t contain downtime.
there's a outstanding amount of steadiness within the IBM i consumer groundwork that they believe, at this element, is reflective in the steadiness of the IBM i platform and large Blue’s personal perception that it needs a match IBM i platform to contain an universal fit vigour techniques enterprise. All of us know that the energy techniques hardware company has simply became in 5 quarters of profits boom – whatever thing they discussed currently in constructing their own income model for the vim methods company – but what they didn't recognize, and what you'll want to understand, is that in the 2nd and third quarters of 2018, the IBM i element of the company grew tremendously quicker than the accustomed power techniques business, and the best understanding that this did not occur within the closing quarter of 2018 is that income of IBM i gear in this autumn 2017 became fairly efficacious and represented a very hard examine. The aspect is, the IBM i enterprise has been elevating the energy techniques class normal. (These guidelines about the IBM i company forward compliments of Steve Sibley, vice chairman and providing supervisor of Cognitive systems at IBM.)
IBM’s personal monetary poise of the power platform – which has been bolstered by way of a movement into Linux clusters for analytics and unreasonable performance computing simulation and modeling in addition to with the aid of the adoption of the HANA in-reminiscence database through SAP purchasers on large iron machines together with Power8 and now Power9 techniques – helps IBM i customers feel extra confident in investing in the latest IBM i platform. The recent proof from a number of different surveys, not just the one completed by way of HelpSystems each year, suggests that agencies are by way of and colossal either carrying on with to beget investments within the platform and even in some circumstances are planning to augment their spending on the IBM i platform in 2019.
As you can see, the sample of investment plans for the IBM i platform, as proven within the chart above, has now not modified very tons at All in the past four years. it's a remarkably solid pattern with but a bit wiggling perquisite here and there that may additionally no longer even live statistically tremendous. simply beneath 1 / 4 of IBM i stores contain mentioned during the past 4 years that they method to boost their investment in the platform in each and every yr, and just under half notify that they're keeping constant. This doesn't imply that the equal companies, year after year, are investing more and different agencies are staying pat, year after yr. it is far more probably that every handful of years – greater dote four or five – customers better their programs and expand their capacity, and they then prefer a seat tight. The phenomenon is that the split isn’t showing some distance fewer organizations investing and much extra sitting tight. That greater than a tenth of the stores don’t live cognizant of what their method is as every prior yr comes to an in depth is just a exiguous stressful, nevertheless it is wholehearted and indicates that a wonderful portion of retailers contain other priorities aside from hardware and operating gear enhancements. they now contain spoke of this earlier than and they are able to notify it once more: They assume that the people who respond to surveys and read weekly publications focused on the IBM i platform are the most vigorous retail outlets – the ones more prone to stay extraordinarily present on hardware and utility. So the tempo of adoption for brand novel applied sciences, and the rate of funding, should live larger than in the specific base, lots of which doesn't exchange a distinguished deal in any respect.
So if they needed to adjust this records to prefer on the total base, there might live some distance fewer websites which are investing extra money, far more businesses that are sitting tight, and perhaps fewer sites that are deliberating poignant off the IBM i platform. I feel the distribution of facts is doubtless whatever thing dote 10 percent of outlets haven't any concept what they're doing investment perspicacious with IBM this 12 months, 5 % are brooding about poignant some or All of their purposes to one other platform, probably 10 percent are investing greater this 12 months, and the ultimate 75 p.c are sitting tight. this is only a bet, of route. as far as they will inform, the rate of attrition – how many websites they basically lose each and every 12 months – only a tad over 1 p.c. So the rate of movement of functions off the platform, or incidences of unplugging IBM i databases and applications, might also no longer live anyplace proximate as high in the common groundwork because the facts above suggests. what is alarming, perhaps, is that the price of relocating some or All applications off the platform is balanced against folks that notify they're going to enhance investments. possibly these are hopeful survey takers, and people who feel it's facile to movement locate it isn't and those that assume they will find the funds to invest will not.
What they achieve recognize is that if the cost of utility attrition was anywhere near as high as these surveys imply, then the IBM i enterprise would no longer live growing to be, however shrinking. And they are cognizant of it is not shrinking, so they account there is a disconnect between planning and reality, each on the upside and the draw back.
in case you drill down into the data for the 2019 IBM i industry Survey, there were 13 percent of retailers that said they might live poignant some purposes to a novel platform, and a further 9 p.c that spoke of they had been going to movement All of their applications off IBM i. (This quantity is consistent with the fresh ALL400s survey performed through John Rockwell.)
Anyway, wonderful luck with that.
Porting applications from one platform to one more, of purchasing a brand novel suite on that novel platform, is an exceptionally difficult project. It is not dote making an attempt to exchange a jade while using down the highway, as is a typical metaphor, but quite dote making an attempt to prefer the jade off one motor vehicle relocating down the highway and installing it on another automobile riding beside it within the adjacent lane without crashing both motor vehicle or smashing into anybody else on the road. Optimism abounds, but when thrust comes to shove, very few companies try this nature of maneuver, and when they do, it is constantly as a result of there's a corporate mandate, greater times than not brought about via a merger or acquisition, that pits another platform towards IBM i running on vim methods. companies that notify they're making any such movement off IBM i are sanguine for their own very own motives, most likely, but they don't look to live always realistic about how long it may take, what disruption it's going to cost, and what most efficacious advantage, if any, could live realized.
if you achieve the mathematics on the chart above, eight-tenths of the groundwork has no theory how long a circulate will take, yet another 1.7 percent thinks it'll prefer greater than five years, and 3 percent notify it will prefer between two years and 5 years. handiest three.four % of the replete groundwork notify they could achieve it in beneath two years. They suppose All of those numbers are positive, and the companies who could with no stitch leave OS/four hundred and IBM i already did a very long time ago and those which are remain contain a harder time, no longer an easier time, moving. If this had been now not proper, the IBM i groundwork can live a hell of a lot smaller than the 120,000 clients they believe are available, in line with what massive Blue has instructed us in the past. here is the contrast between dread or drive or subculture and the truth of attempting to stream a company off one platform and onto a different. These strikes are All the time a distinguished deal tougher than they issue on the entrance conclusion, and they suspect lots of the merits additionally don’t materialize for those who achieve start platforms.
on the yardstick attrition expense cautioned through this survey statistics – 9 p.c circulate off the platform in somewhere between three hundred and sixty five days and more than five years, with most organizations no longer being able to perceive greater than 5 years into the longer term it truly is a desirable trick – the achieve in groundwork would shrink dramatically. it's difficult to title how a long way on account of the colossal selection of timeframes within the survey. If it was 9 p.c of the groundwork within two years – title it 4.5 p.c of the groundwork per yr – then within a decade the common groundwork would reduce from one hundred twenty,000 IBM i websites worldwide down to about 72,000. this would melodramatic indeed. however at a 1 p.c attrition expense per 12 months, the bottom remains at 107,500 entertaining customers (no longer websites and not achieve in machines, both of which are larger) by means of 2029. They feel there's each break that the attrition rate will definitely tedious and drop beneath 1 % as IBM demonstrates commitment to the vim techniques platform and its IBM i operating device. There are at All times some novel purchasers being delivered in novel markets, to beget sure, however the bleed price (besides the fact that it's small) remains likely an order of magnitude larger than the feed cost.
when they achieve feel about making the move, IBM i shops know precisely where they wish to go, and this own has been regularly altering through the years: Linux as an alternative election to IBM i is on the upward thrust and home windows Server as an alternative is on the wane. in the latest survey, 52 % of the businesses that mentioned they had been relocating All or a few of their purposes to an extra platform stated they had been deciding upon windows Server, while 34 % selected Linux. This reflects the relative popularity of windows Server and Linux in the datacenters of the realm at massive, and may live tipped just a exiguous more closely towards Linux in comparison to the comfort of the world. interestingly, 10 % of those polled who stated they had been relocating were AIX platforms, and one more four % were going upscale to gear z mainframes – as not going as this may look. platforms are inclined to roll downhill; they achieve not constantly defy gravity dote that.
The issue about such surveys is that they panoply intent, no longer motion. They regularly intend to achieve a lot more than they really can accomplish, and relocating structures after spending many years of build up expertise is not constantly a very smart circulate except the platform is in proper obstacle – just dote the Itanium techniques from Hewlett Packard commercial enterprise running OpenVMS or HP-UX or the HP 3000s running MPE or the Sparc methods from Oracle working Solaris. These contain been once superb systems with colossal achieve in bases and giant earnings streams, however now, IBM is the ultimate of these Unix and proprietary systems with its vim techniques line. And it is via a ways the greatest and for certain the only 1 displaying any boom.
The IBM i groundwork Did certainly stream On Up
The IBM i groundwork Is able to stream On Up
investment And Integration warning signs For IBM i
protection silent Dominates IBM i dialogue, HelpSystems’ 2018 Survey reveals
The IBM i groundwork not As Jumpy because it Has Been
The Feeds And Speeds Of The IBM i Base
IBM i Priorities For 2017: Pivot To protection
IBM i tendencies, issues, And Observations
IBM i Survey receives superior As Numbers grow
the space achieve those IBM i Machines Work?
finding IBM i: A video game Of forty Questions
it is time to command Us What you're as much as
IBM i industry Survey: The significance Of Being Earnest
What’s Up in the IBM i industry?
IBM i market Survey Fills within the Blanks
street to Java Goes via RPG IV
[Editor’s Note: This article is participate one of a three-part train on making the transition from RPG to Java in an AS/400 shop.]
You’re committed to the AS/400 and better applications in RPG. it works first-class for you, All the time has. but you’ve heard so a entire lot about Java being the way forward for AS/400 utility building, if now not the savior of the platform. really, nothing runs it more desirable than the AS/400. so you want to perceive what Java can achieve in your green-screen RPG applications.
You’re no longer by myself. At consumer conferences coast-to-coast, standing-room simplest crowds are packing convention rooms to ascertain just what Java is All about. however the transition from accustomed RPG to Java doesn’t ensue in a single day. IBM has outlined five phases AS/400 shops may silent dart through alongside the street to Java.
this article offers with participate I – upgrading RPG III and CL to RPG IV and ILE CL.
Why upgrade to RPG IV? firstly, IBM is not any longer investing in RPG III. For that weigh number, it simplest invests in RISC versions of RPG IV. Secondly, RPG IV, accessible due to the fact the V3R1 release of OS/400 4 years in the past, is a extra up to date utility building environment.
“RPG IV is more modular,” says George Farr, VisualAge RPG and ILE RPG IV technical construction supervisor. “You don’t contain monolithic purposes with lines and features of code.”
additionally, RPG IV is ILE-enabled, significance it can live integrated with purposes written in different ILE (integrated Language environment) languages dote C and COBOL . “that you could fuse RPG with different languages, it combines All of the traces together,” says Farr. “You create something in RPG, C or COBOL and sprint it All from a single technique.”
Farr says RPG IV has similarities to Java in language facets and syntax, notwithstanding it doesn’t contain any object-oriented facets dote encapsulation, polymorphism and inheritance. He explains that RPG IV has structured op codes that “examine at once” to loops and “if…opt for” services in Java. records varieties used through each languages are similar.
“in case you movement straight from RPG III to Java, the getting to know curve is plenty steeper,” he says. “If it’s 50 percent going from RPG IV to Java, it’s eighty % going from RPG III to Java.” And even if you don’t intend to stream from RPG to Java, you’ll nevertheless should circulate to RPG IV to integrate Java into your device environment.
“if you’re going to contain any interoperability between Java and RPG, contain Java title RPG or RPG muster Java, most efficacious RPG IV can supply that enablement,” Farr says.
“As they stream ahead, I basically don’t suppose Java will ever substitute RPG. RPG is perquisite here to stay. although they wanted to destroy it, what on the planet would they achieve with the hundreds of thousands of traces of RPG code which are accessible? if you believe your present applications don’t exigency Java, which you could depart away them the style they are. but you can enable Java to deal with RPG and RPG to check with Java with RPG IV.”
The RPG tide is slowly turning toward RPG IV. Farr estimates that the percent of RPG clients on RPG IV became in the single digits in the first two years after RPG IV became released. He says it’s doubtless within the 40-50 p.c purview now.
“when you stream to RPG IV, beget certain to invest in cleaning up your RPG code,” he says. “With RPG IV’s op codes, that you could achieve things in a single line of code – dote add a date/time stamp – that you would exigency to write traces of code for in RPG III. You stream to RPG IV, you eddy them into approaches.”
So transitioning to RPG IV received’t flip RPG developers into Java developers. nonetheless it’s a vital first step. Farr cautions that the thing-oriented nature of Java will also live tangled to hold proximate for the RPG programmer.
“Java is an object-oriented language akin to C++. It’s now not being pushed through organizations however by way of the consumer group. Java is a very conditional language. It cleans up loads of the mess of C++, with assorted inheritance, with pointers, with rubbish assortment. Java’s made it an abominable lot sooner to achieve object-oriented programming than C++. however any OO language is going to live tough to an RPG person.
“It’ll live more convenient to gain information of Java than C++. The language facets can live effortless to study, however the OO facets will live extremely difficult. it will possibly prefer americans a few months just to live trained what OO is All about.”
Farr says now not every RPG programmer will exigency to live taught Java. He suggests that most retail outlets may live combined RPG and Java. novel hires is usually the Java consultants.
“I perceive Java as unavoidable in particular with the web. Most corporations will should tune in to it at some factor.” in case you convert your RPG III functions to RPG IV, don’t leave your CL purposes at the back of. They ought to live converted to ILE CL.
“if in case you contain functions written in RPG III and you convert them to RPG IV, it’s not wonderful ample if your CL continues to live in an OPM (usual software module) ambiance,” says Jing Wang, senior utility engineer at IBM’s Rochester, Minn. AS/four hundred building center. “RPG IV runs perquisite into a divorce ILE motion neighborhood. Sharing open data and confide manage doesn't travail that well with CL. You ought to migrate CL to ILE CL and beget the entire utility ILE.
“We’ve create out lots of applications achieve participate open info. devoid of poignant to ILE CL, that you could silent beget info shareable, but it surely’s now not that easy.”
Like RPG IV, ILE CL is a must for interfacing with Java functions. aside from being an extra step alongside the highway to Java, ILE CL offers efficiency merits as well.
“When an RPG program executes an external name, efficiency intelligent, it’s not nearly as wonderful with CL,” Wang says. “if you betide to stream CL to ILE and combine that CL module with the [ILE] RPG module to figure a single program object, efficiency intelligent, it’ll live superior than anything else you had earlier than.”
[Editor’s Note: participate two of the Road to Java series, due to sprint in the Jan. 11, 1999 MIDRANGE Systems, will focus on making the transition to modular ILE application development.]
Developer family members withdrawal: IBM iSeries AS/four hundred computing device-primarily based practicing curriculum from computerized practicing methods (ATS)IBM united states Withdrawal Announcement 905-218September 27, 2005
available codecs: ENUS905-218.PDF(9KB)
useful January 13, 2006, IBM will withdraw from marketing below the Developer advertising and marketing Partnerships-Remarketing utility program, the following selected computer-based practicing courses from program supplier computerized training systems, Inc. (ATS):
ProgramProgram title number edition
AS/four hundred(R) COBOL/four hundred(R) Programming 5620-BYE 1AS/four hundred Interactive COBOL Programming 5620-BYF 1AS/400 COBOL/400 Subfile Programming 5620-BYG 1AS/400 advanced COBOL Programming 5620-BYH 1AS/four hundred RPG/400(R) Programming 5620-BYI 1AS/400 Interactive RPG/four hundred Programming 5620-BYJ 1AS/four hundred RPG/four hundred Subfile Programming 5620-BYK 1AS/four hundred advanced RPG/four hundred Programming 5620-BYL 1AS/400 RPG IV Programming 5620-BYM 1AS/four hundred Database Administration I: 5620-BYU 1Data Description SpecificationsAS/400 Database Administration II: 5620-BYV 1Design and ImplementationAS/four hundred SQL/400(R) 5620-BYW 1AS/400 question for users 5620-BYX 1AS/400 query for advanced users 5620-BYY 1OfficeVision/400(TM) very own services 5620-BYZ 1OfficeVision/400 primary note Processing 5620-BZA 1OfficeVision/400 superior notice Processing 5620-BZB 1AS/four hundred Introduction: advanced sequence 5620-BZC 1AS/four hundred manage Language Programming 5620-BZD 1AS/four hundred CL and Programming concepts 5620-BZE 1AS/400 travail management 5620-BZF 1AS/400 application construction 5620-BZG 1AS/400 security 5620-BZH 1Client entry RUMBA/400 5620-BZI 1AS/four hundred web.facts(R) power 5620-BZJ 1AS/400 Java(TM) Introduction 5620-DAQ 1Client access for administrators 5620-DAR 1On or after January 13, 2006, that you may no longer order these items directly from IBM or an IBM approved Distributor.
This withdrawal applies to the IBM Developer marketing Partnership relationship best. different relationships between ATS and IBM, within the U.S. or global, are unaffected.
replacement product assistance: None
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program capabilities don't follow.
confer with the utility license agreements (SLA) web web page for assistance on the application functions conclusion date
OfficeVision/400 is a trademark of overseas company Machines enterprise in the united states or different international locations or both.
AS/400, COBOL/400, RPG/four hundred, SQL/four hundred, and internet.statistics are registered trademarks of overseas company Machines supplier in the u.s. or different nations or both.
Java is a trademark of solar Microsystems, Inc.
different enterprise, product, and repair names may well live emblems or service marks of others.
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AS/400 RPG IV Developer
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Road to Java Goes Through RPG IV
[Editor’s Note: This article is participate one of a three-part train on making the transition from RPG to Java in an AS/400 shop.]
You’re committed to the AS/400 and develop applications in RPG. It works fine for you, always has. But you’ve heard so much about Java being the future of AS/400 application development, if not the savior of the platform. In fact, nothing runs it better than the AS/400. So you want to perceive what Java can achieve for your green-screen RPG applications.
You’re not alone. At user conferences coast-to-coast, standing-room only crowds are packing conference rooms to find out just what Java is All about. But the transition from traditional RPG to Java doesn’t betide overnight. IBM has outlined five phases AS/400 shops should depart through along the road to Java.
This article deals with aspect I – upgrading RPG III and CL to RPG IV and ILE CL.
Why upgrade to RPG IV? First of all, IBM is no longer investing in RPG III. For that matter, it only invests in RISC versions of RPG IV. Secondly, RPG IV, available since the V3R1 release of OS/400 four years ago, is a more modern application development environment.
“RPG IV is more modular,” says George Farr, VisualAge RPG and ILE RPG IV technical development manager. “You don’t contain monolithic applications with lines and lines of code.”
Furthermore, RPG IV is ILE-enabled, significance it can live integrated with applications written in other ILE (Integrated Language Environment) languages dote C and COBOL . “You can fuse RPG with other languages, it combines All the lines together,” says Farr. “You create something in RPG, C or COBOL and sprint it All from a single process.”
Farr says RPG IV has similarities to Java in language elements and syntax, though it doesn’t contain any object-oriented features dote encapsulation, polymorphism and inheritance. He explains that RPG IV has structured op codes that “compare directly” to loops and “if…select” functions in Java. Data types used by both languages are identical.
“If you dart straight from RPG III to Java, the learning curve is a lot steeper,” he says. “If it’s 50 percent going from RPG IV to Java, it’s 80 percent going from RPG III to Java.” And even if you don’t intend to dart from RPG to Java, you’ll silent exigency to dart to RPG IV to integrate Java into your system environment.
“If you’re going to contain any interoperability between Java and RPG, contain Java muster RPG or RPG muster Java, only RPG IV can provide that enablement,” Farr says.
“As they dart forward, I really don’t assume Java will ever supersede RPG. RPG is here to stay. Even if they wanted to destroy it, what on earth would they achieve with the millions of lines of RPG code that are out there? If you feel your existing applications don’t exigency Java, you can leave them the way they are. But you can enable Java to talk to RPG and RPG to talk to Java with RPG IV.”
The RPG tide is slowly turning toward RPG IV. Farr estimates that the percentage of RPG users on RPG IV was in the single digits in the first two years after RPG IV was released. He says it’s likely in the 40-50 percent purview now.
“Once you dart to RPG IV, you should invest in cleaning up your RPG code,” he says. “With RPG IV’s op codes, you can achieve things in a single line of code – dote add a date/time stamp – that you would contain to write lines of code for in RPG III. You dart to RPG IV, you eddy them into procedures.”
So transitioning to RPG IV won’t eddy RPG developers into Java developers. But it’s an essential first step. Farr cautions that the object-oriented nature of Java can live difficult to grasp for the RPG programmer.
“Java is an object-oriented language similar to C++. It’s not being pushed by companies but by the user community. Java is a very elegant language. It cleans up a lot of the mess of C++, with multiple inheritance, with pointers, with garbage collection. Java’s made it a lot faster to achieve object-oriented programming than C++. But any OO language is going to live hard to an RPG user.
“It’ll live easier to learn Java than C++. The language features will live facile to learn, but the OO features will live extremely hard. It may prefer people a yoke of months just to learn what OO is All about.”
Farr says not every RPG programmer will exigency to learn Java. He suggests that most shops will live mixed RPG and Java. novel hires will likely live the Java experts.
“I perceive Java as unavoidable especially with the Internet. Most companies will contain to tune in to it at some point.” If you convert your RPG III applications to RPG IV, don’t leave your CL applications behind. They must live converted to ILE CL.
“If you contain applications written in RPG III and you convert them to RPG IV, it’s not wonderful enough if your CL is silent in an OPM (original program module) environment,” says Jing Wang, senior software engineer at IBM’s Rochester, Minn. AS/400 development center. “RPG IV runs into a divorce ILE action group. Sharing open files and confide control does not travail that well with CL. You must migrate CL to ILE CL and beget the entire application ILE.
“We’ve create out a lot of applications achieve participate open files. Without poignant to ILE CL, you can silent beget files shareable, but it’s not that smooth.”
Like RPG IV, ILE CL is a must for interfacing with Java applications. Aside from being another step along the road to Java, ILE CL offers performance benefits as well.
“When an RPG program executes an external call, performance wise, it’s not as wonderful with CL,” Wang says. “When you dart CL to ILE and combine that CL module with the [ILE] RPG module to figure a single program object, performance wise, it’ll live better than anything you had before.”
[Editor’s Note: participate two of the Road to Java series, due to sprint in the Jan. 11, 1999 MIDRANGE Systems, will focus on making the transition to modular ILE application development.]
Many of you contain heard about one of the oldest programming languages, COBOL, and you contain also heard that COBOL programmers are much asked for nowadays to maintain stale legacy code. There’s another old-timer which few know about and which is silent in expend and will live in expend for quite a while for applications in various specific fields (i.e. finance, banking, etc.). Its title is IBM RPG.
Once upon a time…
RPG is a high-level programming language for trade applications. It is an IBM proprietary programming language and its later versions are available only on IBM i- or OS/400-based systems.
RPG has been around for more than half a century. By the intermission of the 1950s, IBM had built a huge number of electromechanical devices called tabulating machines. The final mass-produced tabulator model was the IBM 407 Accounting Machine:
Figure 1. IBM 407 at U.S. Army’s Redstone Arsenal, 1961
By the way, this tabulator rented from $800 to $920 per month ($8100 to $9300 per month in 2016 dollars), depending on the model. They were withdrawn from marketing on December 17, 1976.
As you know, scientific and technological progress was striding forward at the time, and the intermission of the 1950s saw the birth of the first transistor computers. The first IBM computer of this nature was IBM 1401 built in 1959:
Figure 2. IBM 1401 at the Endicott History and Heritage Center
The Computer History Museum has one working unit. prefer a view at how it All worked — that’s really captivating (I especially dote the phrase “We exigency a exiguous bit of cooling” at 4:41):
To facilitate ease of transition for their customers to the novel transistor computers, IBM developed two tools in 1959 to replicate punched-card processing on computers: FARGO (Fourteen-o-one Automatic Report Generation Operation) and RPG (Report Program Generator). Both languages’ syntax resembled that of the instruction language of electromechanical tabulators. FARGO and RPG also replicated an essential feature of tabulators: cyclic processing mode (known as the program cycle), in which tabulators read punched cards, summarized their contents, and printed a result. IBM silent maintains backward compatibility with the program cycle even in the latest dialect, RPG IV.
Even though RPG was developed under much influence of FARGO, it took RPG just a few years to supersede its predecessor as a more superior language. The next system to receive RPG advocate was mainframe IBM System/360 Model 20:
Figure 3. IBM System/360 Model 20 at the Deutsches Museum
A yoke of years later (at the intermission of the 1960s), IBM released the next dialect, RPG II, for midrange computer System/3:
Figure 4. Midrange computer IBM System/3 Model 10 and the operator at work
RPG has since evolved into an HLL equivalent to COBOL and PL/I. Its distinctive feature (in contrast to modern languages) was the so called fixed-format syntax, so programs were difficult to read without a special debugging template.
An RPG program once typically started off with File Specifications, listing All files being written to, read from, or updated, followed by Data Definition Specificationscontaining program elements such as Data Structures and dimensional arrays, much dote a “Working-Storage” section of a COBOL program or “var” statements in Pascal. A variable is defined with a fixed-format Definition Specification. In the Definition Specification, denoted by a missive D in column 6 of a source line, the data nature character (see the table below) would live encoded in column 40. Also, if the data nature character is omitted, that is, left blank, the default will live A if no decimal positions are specified. Otherwise, the default will live P.
Further the Calculation Specifications were given, which are the list of commands for execution. Output Specifications could also follow, they determined the layout of other files or reports.
The following is the description of All the specifications types:
The U or Auto Report spec is only required for Auto Report programs.
The H or Header spec is at the top of the program and describes compiler options such as maximum compile size, whether the program is an MRT (Multiple Requestor Terminal) program, and what nature of listing is generated when the program is compiled. The demur title of the program created is located in columns 75–80; if a source does not contain an H spec, the title RPGOBJ is used.
The F or File spec(s) are next, and describes the files used in the program. Files may live disk files (DISK) or may live devices such as a printer (PRINTER), the workstation (WORKSTN), keyboard (KEYBORD), unformatted panoply (CRT or DISPLAY), or user-defined (SPECIAL). Record size, obscure size, overflow indicators, and external indicators are described. It is possible that an RPG program will not expend any F specs.
The E or Extension spec(s) are next, and relate arrays and tables, which may live prefetched from disk files (an Input table), drawn from constants placed at the intermission of the source between ** and /* symbols, or built from calculations.
The L or Line Counter spec(s) are next, and if present, relate the figure to live printed. It defines the number of lines in a page and the positions where printing begins and ends.
The I or Input specs are next, and relate the data areas within files. RPG II permits redefinition of data areas so that a domain named FLDA might occupy the same region as an array AR that contains 8 elements of 1 character each. Non-record areas such as data structures can live described. Depending on the values of the input record, indicators may live conditioned.
The C or Calculation spec(s) are next. Total fields may live described and accumulated. tangled computations and string manipulations are possible. Indicators may live conditioned.
The final specification(s) are O or Output specifications, which relate the output record in terms of fields and output positions.
Now, here’s a diminutive illustration for you to rehearse reading RPG programs (F and D specifications are omitted):
* Asterisk (*) in column 7 defines a comment line
* In column 6, you write a character denoting* the specification nature to live used. The nature of specification* defines what the source line does (i.e. definitions section,* calculations section, etc.).* "C" spec (calculation) describes calculations to live done.C HOURS IFLE 40C HOURS MULT RATE PAYC ELSEC RATE MULT 40 PAY 72C HOURS SUB 40 OTIME 30C RATE MULT 1.5 OTRATE 94C OTRATE MULT OTIME OTPAY 72C ADD OTPAY PAYC END
This code looks complicated, doesn’t it? And that’s just a simple payroll tax calculation for an hourly employee (employees procure time and a half for hour worked beyond the first 40).
In 1978, IBM introduced midrange computer System/38 and a novel RPG dialect, RPG III, for it:
Figure 6. Midrange computer IBM System/38
From that minute on, IBM was gradually abolishing the limitations of the language; programmers were allowed to write specifications in free form:
If Hours <= 40;
Pay = Hours * Rate;
Pay = (40 * Rate) + ((Hours — 40) * (Rate * 1.5));
Finally, the final version, RPG IV (aka RPGLE, ILE RPG), was released in 1994. Its three prominent features are built-in functions, procedures, and free-form programming. Until November 2013, the free format applied exclusively to the calculation specifications. With the V7R1 TR7 upgrade to the language, the “/free” and “/end-free” calculations are no longer necessary, and the language has finally broken the ties to punched cards.
I also recommend looking at this document where IBM demonstrates the drastic changes made to the language. RPG remains a current programming language on the IBM i operating system, which runs on IBM Power i platform hardware:
Figure 7. IBM Power i server series
All in all, the RPG programming language has been used on 1401, /360, /3, /32, /34, /36, /38 AS/400 and System i systems. There contain also been implementations for the Digital VAX, Sperry Univac BC/7, Univac system 80, Siemens BS2000, Burroughs B700, B1700, Hewlett Packard HP3000, ICL 2900 series, Honeywell 6220 and 2020, Four-Phase IV/70 and IV/90 series, Singer System 10 and WANG VS, as well as heterogeneous compilers and runtime environments for Unix-based systems, such as Infinite36 (formerly Unibol 36), and PCs (Baby/400, Lattice-RPG).
Today, RPG IV is a more robust language. Editing can silent live done via SEU, the simple green-screen editor:
Figure 8. Green-screen editor
However, a long progression of tools has been developed over time. Some of these contain included Visual Age for RPG, which was developed by IBM and promoted by Jon Paris and others. Currently the preferred editing platform is IBM’s Websphere development Studio client, now named RDi (Rational Developer for i), which is a customized implementation of Eclipse:
Figure 9. Rational Developer for i
There is also an RPG compiler for Microsoft .NET. This version contains extensions to RPG IV beyond that of the groundwork IBM compiler. These extensions provide Microsoft Windows and .NET hooks in the aboriginal and System 36 environment, as well as the ability to port DB/2 files to Microsoft Access and Microsoft SQL Server databases via ODBC.
Although RPG is quite an exotic language, it is a fact that there exists a large amount of code written in it in specific fields such as finance, banking, and the like. The language is quite diverse: it includes 4 dialects and supports both fixed- and free-form programming. The exigency to maintain stale legacy code and write novel code favor companies to hunt RPG developers, who look to live on the Red List for threatened species. Given the circumstances, additional code-quality control tools such as static analyzers are much called for.
You must contain already guessed what the understanding for writing this article is and what they are driving at. You’re right: they are now considering the scheme of creating a static code analyzer for the RPG language. I believe such an analyzer would live a distinguished aid to those who silent maintain and develop RPG programs. But they haven’t forward to a determination yet. Needless to say, it’s quite a specific niche.
That’s why they exigency you to command us if you want PVS-Studio analyzer to become a appliance that could detect bugs in RPG programs. Dear potential users of PVS-Studio RPG, they are looking for you. Don’t vacillate to email us!
February 11, 2019 Timothy Prickett Morgan
If nothing else, the IBM i platform has exhibited extraordinary longevity. One might even notify legendary longevity, if you want to prefer its history All the way back to the System/3 minicomputer from 1969. This is the true starting point in the AS/400 family tree and this is when colossal Blue, for very sound legal and technical and marketing reasons, decided to fork its products to address the unique needs of large enterprises (with the System/360 mainframe and its follow-ons) and diminutive and medium businesses (starting with the System/3 and poignant on through the System/34, System/32, System/38, and System/36 in the 1970s and early 1980s and passing through the AS/400, AS/400e, iSeries, System i, and then IBM i on Power Systems platforms.
It has been a long sprint indeed, and many customers who contain invested in the platform started way back then and there with the early versions of RPG and moved their applications forward and changed them as their businesses evolved and the depth and breadth of corporate computing changed, poignant on up through RPG II, RPG III, RPG IV, ILE RPG, and now RPG free form. Being on this platform for even three decades makes you a relative newcomer.
There is a longer sprint ahead, since they believe that the companies that are silent running IBM i systems are the proper diehards, the ones who contain no goal of leaving the platform and that, at least according to the survey data they contain been privy too, are intending to continue investing in, or even expand their investments in, the IBM i platform.
Thus far, they are not in a recession and heaven willing there will not live one, so the priorities that IBM i shops contain are not the ones that they had a decade ago during the height of the distinguished Recession. Back then, as was the case in just about All IT organizations, IBM i shops were hunkering down and were trying to gash costs in All ways possible, including deferring system upgrades and migrations as well as cutting back on other projects. Only 29 percent of the 750 IBM i shops that participated in the 2019 IBM i Marketplace Survey, which HelpSystems did back in October 2018, were concerned about reducing IT spending. This is a remarkably low level, and I assume is indicative of how relatively sturdy the economy is – excepting some of the fits and starts they saw at the intermission of 2018 and here in early 2019 that beget us nervous and could start putting pressure on things. Here are the top concerns as culled from the survey:
Dealing with the growth in data and in figuring out the analytics to chew on that data ranked a exiguous bit higher on the 2019 IBM i Marketplace Survey than did reducing costs, and I assume over the long haul these issues will become more essential than modernizing applications and dealing with the IBM i skills shortages that are a perennial worry. Both of these issues are being solved as novel programmers and novel tools to beget novel interfaces to database applications are becoming more common and as technologies such as free figure RPG, which looks more dote Java, Python, and PHP, are being more widely deployed and, importantly, can live picked up more quickly by programmers experienced with these other languages.
Given the nature of the customer base, it seems unlikely to me that security and high availability will not continue to live primary concerns, despite the fact that the IBM i platform is among the most secure platforms on the planet (and not just because it is obscure, but because it is exceedingly difficult to hack) and it has a purview of high availability and calamity recovery tools (from IBM, Syncsort, Maxava, and HelpSystems) available for those who want to double up their systems and protect their applications and data. The bar is often higher than simple backup and recovery for many IBM i shops in the banking, insurance, manufacturing, and distribution industries that dominate the platform. These companies can’t contain security breaches, and they can’t contain downtime.
There is a remarkable amount of stability in the IBM i customer groundwork that they think, at this point, is reflective in the stability of the IBM i platform and colossal Blue’s own faith that it needs a healthy IBM i platform to contain an overall healthy Power Systems business. They All know that the Power Systems hardware trade has just turned in five quarters of revenue growth – something they discussed recently in developing their own revenue model for the Power Systems trade – but what they did not know, and what you should know, is that in the second and third quarters of 2018, the IBM i portion of the trade grew significantly faster than the overall Power Systems business, and the only understanding that this did not betide in the final quarter of 2018 is that sales of IBM i machinery in Q4 2017 was quite sturdy and represented a very tough compare. The point is, the IBM i trade has been raising the Power Systems class average. (These hints about the IBM i trade forward compliments of Steve Sibley, vice president and offering manager of Cognitive Systems at IBM.)
IBM’s own monetary stability of the Power platform – which has been bolstered by a dart into Linux clusters for analytics and high performance computing simulation and modeling as well as by the adoption of the HANA in-memory database by SAP customers on colossal iron machines including Power8 and now Power9 systems – helps IBM i customers feel more confident in investing in the current IBM i platform. The recent evidence from several different surveys, not just the one done by HelpSystems every year, suggests that companies are by and large either continuing to invest in the platform or even in some cases are planning to augment their spending on the IBM i platform in 2019.
As you can see, the pattern of investment plans for the IBM i platform, as shown in the chart above, has not changed very much at All in the past four years. It is a remarkably stable pattern with but a exiguous wiggling here and there that may not even live statistically significant. Just under a quarter of IBM i shops contain reported in the past four years that they method to augment their investment in the platform in each year, and just under half notify that they are holding steady. This does not live substantive that the same companies, year after year, are investing more and other companies are staying pat, year after year. It is far more likely that every handful of years – more dote four or five – customers upgrade their systems and expand their capacity, and they then sit tight. The phenomenon is that the split isn’t showing far fewer companies investing and far more sitting tight. That more than a tenth of the shops don’t know what their method is as each prior year comes to a proximate is a bit disturbing, but it is honest and shows that a significant portion of shops contain other priorities aside from hardware and operating system upgrades. They contain said this before and they will notify it again: They assume that the people who respond to surveys and read weekly publications focused on the IBM i platform are the most vigorous shops – the ones more likely to stay relatively current on hardware and software. So the pace of adoption for novel technologies, and the rate of investment, should live higher than in the actual base, much of which does not change much at all.
So if they had to adjust this data to prefer on the entire base, there might live far fewer sites that are investing more money, far more companies that are sitting tight, and maybe fewer sites that are contemplating poignant off the IBM i platform. I assume the distribution of data is probably something dote 10 percent of shops contain no scheme what they are doing investment sapient with IBM this year, 5 percent are thinking about poignant some or All of their applications to another platform, maybe 10 percent are investing more this year, and the remaining 75 percent are sitting tight. This is just a guess, of course. As far as they can tell, the rate of attrition – how many sites they actually lose each year – just a tad over 1 percent. So the rate of movement of applications off the platform, or incidences of unplugging IBM i databases and applications, may not live anywhere near as high in the overall groundwork as the data above suggests. What is alarming, perhaps, is that the rate of poignant some or All applications off the platform is balanced against those who notify they will augment investments. Perhaps these are hopeful survey takers, and those who assume it is facile to dart find it is not and those who assume they will find the money to invest will not.
What they achieve know is that if the rate of application attrition was anywhere near as high as these surveys suggest, then the IBM i trade would not live growing, but shrinking. And they know it is not shrinking, so they assume there is a disconnect between planning and reality, both on the upside and the downside.
If you drill down into the data for the 2019 IBM i Marketplace Survey, there were 13 percent of shops that said they would live poignant some applications to a novel platform, and another 9 percent that said they were going to dart All of their applications off IBM i. (This number is consistent with the recent ALL400s survey done by John Rockwell.)
Anyway, wonderful luck with that.
Porting applications from one platform to another, of buying a novel suite on that novel platform, is an exceedingly difficult task. It is not dote trying to change a jade while driving down the road, as is a common metaphor, but rather dote trying to prefer the jade off one car poignant down the highway and installing it on another car driving beside it in the adjacent lane without crashing either car or smashing into anyone else on the road. Optimism abounds, but when thrust comes to shove, very few companies try such a maneuver, and when they do, it is usually because there is a corporate mandate, more times than not caused by a merger or acquisition, that pits some other platform against IBM i running on Power Systems. Companies that notify they are making such a dart off IBM i are sanguine for their own personal reasons, perhaps, but they are not necessarily realistic about how long it might take, what disruption it will cost, and what ultimate benefit, if any, will live realized.
If you achieve the math on the chart above, eight-tenths of the groundwork has no scheme how long a dart will take, another 1.7 percent thinks it will prefer more than five years, and 3 percent notify it will prefer between two years and five years. Only 3.4 percent of the total groundwork notify they can achieve it in under two years. They assume All of these numbers are optimistic, and the companies who could easily leave OS/400 and IBM i already did a long time ago and those that are remain contain a harder time, not an easier time, moving. If this were not true, the IBM i groundwork would live a hell of a lot smaller than the 120,000 customers they assume are out there, based on what colossal Blue has told us in the past. This is the contrast between dread or pressure or culture and the reality of trying to dart a trade off one platform and onto another. These moves are always a lot harder than they look on the front end, and they suspect many of the benefits also don’t materialize for those who achieve jump platforms.
At the objective attrition rate suggested by this survey data – 9 percent dart off the platform in somewhere between one year and more than five years, with most companies not being able to perceive more than five years into the future that is a desirable trick – the installed groundwork would shrink dramatically. It is tough to notify how far because of the wide purview of timeframes in the survey. If it was 9 percent of the groundwork within two years – muster it 4.5 percent of the groundwork per year – then within a decade the overall groundwork would shrink from 120,000 IBM i sites worldwide down to about 72,000. This would melodramatic indeed. But at a 1 percent attrition rate per year, the groundwork is silent at 107,500 unique customers (not sites and not installed machines, both of which are larger) by 2029. They assume there is every random that the attrition rate will actually tedious and drop underneath 1 percent as IBM demonstrates commitment to the Power Systems platform and its IBM i operating system. There are always some novel customers being added in novel markets, to live sure, but the bleed rate (even if it is small) is silent probably an order of magnitude larger than the feed rate.
When they achieve assume about making the move, IBM i shops know exactly where they want to go, and this own has been gradually changing over the years: Linux as an alternative to IBM i is on the mount and Windows Server as an alternative is on the wane. In the latest survey, 52 percent of the companies that said they were poignant All or some of their applications to another platform said they were choosing Windows Server, while 34 percent chose Linux. This reflects the relative popularity of Windows Server and Linux in the datacenters of the world at large, and may live tipped just a exiguous more heavily towards Linux compared to the comfort of the world. Interestingly, 10 percent of those polled who said they were poignant were looking at AIX platforms, and another 4 percent were going upscale to System z mainframes – as unlikely as this may seem. Platforms watch to roll downhill; they achieve not usually defy gravity dote that.
The thing about such surveys is that they panoply intent, not action. They often intend to achieve a lot more than they actually can accomplish, and poignant platforms after spending decades of building up expertise is not usually a very smart dart unless the platform is in true stitch – dote the Itanium systems from Hewlett Packard Enterprise running OpenVMS or HP-UX or the HP 3000s running MPE or the Sparc systems from Oracle running Solaris. These were once distinguished platforms with huge installed bases and tremendous revenue streams, but now, IBM is the final of these Unix and proprietary platforms with its Power Systems line. And it is by far the biggest and for certain the only one showing any growth.
The IBM i groundwork Did Indeed dart On Up
The IBM i groundwork Is Ready To dart On Up
Investment And Integration Indicators For IBM i
Security silent Dominates IBM i Discussion, HelpSystems’ 2018 Survey Reveals
The IBM i groundwork Not As Jumpy As It Has Been
The Feeds And Speeds Of The IBM i Base
IBM i Priorities For 2017: Pivot To Defense
IBM i Trends, Concerns, And Observations
IBM i Survey Gets Better As Numbers Grow
Where achieve Those IBM i Machines Work?
Finding IBM i: A Game Of 40 Questions
It Is Time To command Us What You Are Up To
IBM i Marketplace Survey: The significance Of Being Earnest
What’s Up In The IBM i Marketplace?
IBM i Marketplace Survey Fills In The Blanks