Welcome!

Mobile IoT Authors: Ed Featherston, Liz McMillan, Elizabeth White, Rostyslav Demush, Kevin Benedict

Related Topics: PowerBuilder, Mobile IoT

PowerBuilder: Article

Appeon Developer Configuration

Tips and techniques

Have you ever used a datastore that ran without a problem while you were developing your application, but once you've compiled it stopped running? Let me tell you that's a difficult bug to fix.

I remember it so well. I kept going back and forth. How in the world could the DataWindow work at design time yet not in the executable? I remember that I checked the return value of the datastore. I finally noticed that the datastore returned a -1. That's such a strange thing.

The datastore returns the number of rows that were returned or a -1. The help files used to say that a -1 was in case of 'an error'. It goes into a lot more detail in version 12.5 but still falls somewhat short of giving you the whole answer.

Here it is...

If you set the dataobject property of a DataWindow or datastore object, then at runtime PowerBuilder will be unable to find it. You will get a return value of -1.

Let me be clear. Take a look at the following code:

datastore lds_employee_list
lds_employee_list = create datastore
lds_employee_list.dataobject = "ds_employee_list"
lds_employee_list.setTransObject(sqlca)

long ll_num_rows

ll_num_rows = lds_employee_list.retrieve()

I'm sure that you've written code like that before. The subject of this article is found in the third line. In that line we set the dataobject property of the newly created datastore. Oh let's step back just a little. In this example I am assuming that you created a new DataWindow and named it ds_employee_list. You'll be able to see it right there in the library painter or in the system tree.

Then in some appropriate event you put the code that I just pointed out.

Now while you're running the code through PowerBuilder there is no problem at all. It will work great. But once you compile the code the last line of this script will always leave ll_num_rows holding a -1.

Isn't that strange? Then you go back to running it through PowerBuilder and sure enough, it works fine. So you optimize the libraries and make sure you do a full rebuild and guess what?

It still returns a -1. That just can't be. That's when you go to your boss and utter those fateful words that make you sound like a compete fool...

But... but... it works just FINE on MY machine.

You can't imagine how bosses hate to hear that.

Here's the issue.

When PowerBuilder runs and encounters that third line it goes out and looks for ds_employee_list. First it looks in the current pbl then, if it doesn't find it, PowerBuilder looks through the library list for it. Eventually PowerBuilder will almost always find that DataWindow object and everything is fine.

The problem happens when we are running the executable. When PowerBuilder builds the executable it pulls the DataWindow object into the pbd. It does that when it's looking through the window painter. It doesn't look though the code to identify those DataWindow objects to pull into the pbd.

This means that at runtime our executable will not be able to find the DataWindow object. Ds_employee_list will simply not be available and the retrieve will return a -1.

How do we fix this? We use the PBR file. That's the file where you put your bitmaps so they will be included into the executable and we won't have to deploy bitmap files with the executable. Here's how it works, you specify the pbl that contains ds_employee_list and then the DataWindow name in parenthesis.

my_app.pbr
C:\images\hand.ico
c:\images\exit.bmp
c:\devel\my_app\my_pbl(ds_employee_list)

Then, in the project painter you specify that my_app.pbr is your PBR file.

Okay, our mystery is solved, right?

Well, no.

The problem came back when I started using Appeon. It was just a bit more complex though. Now the application works at design time. It works when running the executable, but when running in the browser I get that -1.

A little research taught me that Appeon doesn't support the PBR file.

How do I get that DataWindow object where it needs to be?

Appeon has a button called Configuration. When you click on it you get the Appeon Developer Configuration. Look at Figure 1.

In the Appeon Developer Configuration you need to select the application that you are currently using. Then click on Edit. That will take you to Figure 2, The Application Profile Configuration. This is a tool with which you really need to become familiar, for now though, click on the 'Additional Files' tabpage. That will give you Figure 2.

Note the highlighted line. It specifies my appeon_mdi.pbl. This tells Appeon that when you deploy your application it should make all of the DataWindow objects in that pbl available for dynamic DataWindows. It is in fact, similar to the PBR for DataWindows.

Oh yeah, the PBR file also specifies bitmaps, icons and the like. That is handled on this tabpage as well. Look at the group box that says Deploy Image Files. If you specify a folder then Appeon will look in that folder and bring in the bitmaps, icons, jpg, png, and other resource files.

Just so you know.

More Stories By Richard (Rik) Brooks

Rik Brooks has been programming in PowerBuilder since the final beta release before version 1. He has authored or co-authored five books on PowerBuilder including “The Definitive DataWindow”. Currently he lives in Mississippi and works in Memphis, Tennessee.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@ThingsExpo Stories
DXWorldEXPO LLC announced today that ICC-USA, a computer systems integrator and server manufacturing company focused on developing products and product appliances, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. DXWordEXPO New York 2018, colocated with CloudEXPO New York 2018 will be held November 11-13, 2018, in New York City. ICC is a computer systems integrator and server manufacturing company focused on developing products and product appliances to meet a wide range of ...
JETRO showcased Japan Digital Transformation Pavilion at SYS-CON's 21st International Cloud Expo® at the Santa Clara Convention Center in Santa Clara, CA. The Japan External Trade Organization (JETRO) is a non-profit organization that provides business support services to companies expanding to Japan. With the support of JETRO's dedicated staff, clients can incorporate their business; receive visa, immigration, and HR support; find dedicated office space; identify local government subsidies; get...
René Bostic is the Technical VP of the IBM Cloud Unit in North America. Enjoying her career with IBM during the modern millennial technological era, she is an expert in cloud computing, DevOps and emerging cloud technologies such as Blockchain. Her strengths and core competencies include a proven record of accomplishments in consensus building at all levels to assess, plan, and implement enterprise and cloud computing solutions. René is a member of the Society of Women Engineers (SWE) and a m...
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at @ThingsExpo, James Kirkland, Red Hat's Chief Archi...
In his general session at 19th Cloud Expo, Manish Dixit, VP of Product and Engineering at Dice, discussed how Dice leverages data insights and tools to help both tech professionals and recruiters better understand how skills relate to each other and which skills are in high demand using interactive visualizations and salary indicator tools to maximize earning potential. Manish Dixit is VP of Product and Engineering at Dice. As the leader of the Product, Engineering and Data Sciences team at D...
Personalization has long been the holy grail of marketing. Simply stated, communicate the most relevant offer to the right person and you will increase sales. To achieve this, you must understand the individual. Consequently, digital marketers developed many ways to gather and leverage customer information to deliver targeted experiences. In his session at @ThingsExpo, Lou Casal, Founder and Principal Consultant at Practicala, discussed how the Internet of Things (IoT) has accelerated our abilit...
Organizations planning enterprise data center consolidation and modernization projects are faced with a challenging, costly reality. Requirements to deploy modern, cloud-native applications simultaneously with traditional client/server applications are almost impossible to achieve with hardware-centric enterprise infrastructure. Compute and network infrastructure are fast moving down a software-defined path, but storage has been a laggard. Until now.
Digital Transformation is much more than a buzzword. The radical shift to digital mechanisms for almost every process is evident across all industries and verticals. This is often especially true in financial services, where the legacy environment is many times unable to keep up with the rapidly shifting demands of the consumer. The constant pressure to provide complete, omnichannel delivery of customer-facing solutions to meet both regulatory and customer demands is putting enormous pressure on...
The best way to leverage your CloudEXPO | DXWorldEXPO presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering CloudEXPO | DXWorldEXPO will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at CloudEXPO. Product announcements during our show provide your company with the most reach through our targeted audienc...
@DevOpsSummit at Cloud Expo, taking place November 12-13 in New York City, NY, is co-located with 22nd international CloudEXPO | first international DXWorldEXPO and will feature technical sessions from a rock star conference faculty and the leading industry players in the world.
DXWorldEXPO LLC announced today that the upcoming DXWorldEXPO | CloudEXPO New York event will feature 10 companies from Poland to participate at the "Poland Digital Transformation Pavilion" on November 12-13, 2018.
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud ...
In his keynote at 19th Cloud Expo, Sheng Liang, co-founder and CEO of Rancher Labs, discussed the technological advances and new business opportunities created by the rapid adoption of containers. With the success of Amazon Web Services (AWS) and various open source technologies used to build private clouds, cloud computing has become an essential component of IT strategy. However, users continue to face challenges in implementing clouds, as older technologies evolve and newer ones like Docker c...
Business professionals no longer wonder if they'll migrate to the cloud; it's now a matter of when. The cloud environment has proved to be a major force in transitioning to an agile business model that enables quick decisions and fast implementation that solidify customer relationships. And when the cloud is combined with the power of cognitive computing, it drives innovation and transformation that achieves astounding competitive advantage.
Cloud-enabled transformation has evolved from cost saving measure to business innovation strategy -- one that combines the cloud with cognitive capabilities to drive market disruption. Learn how you can achieve the insight and agility you need to gain a competitive advantage. Industry-acclaimed CTO and cloud expert, Shankar Kalyana presents. Only the most exceptional IBMers are appointed with the rare distinction of IBM Fellow, the highest technical honor in the company. Shankar has also receive...
Michael Maximilien, better known as max or Dr. Max, is a computer scientist with IBM. At IBM Research Triangle Park, he was a principal engineer for the worldwide industry point-of-sale standard: JavaPOS. At IBM Research, some highlights include pioneering research on semantic Web services, mashups, and cloud computing, and platform-as-a-service. He joined the IBM Cloud Labs in 2014 and works closely with Pivotal Inc., to help make the Cloud Found the best PaaS.
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
DXWorldEXPO LLC announced today that All in Mobile, a mobile app development company from Poland, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. All In Mobile is a mobile app development company from Poland. Since 2014, they maintain passion for developing mobile applications for enterprises and startups worldwide.
We are seeing a major migration of enterprises applications to the cloud. As cloud and business use of real time applications accelerate, legacy networks are no longer able to architecturally support cloud adoption and deliver the performance and security required by highly distributed enterprises. These outdated solutions have become more costly and complicated to implement, install, manage, and maintain.SD-WAN offers unlimited capabilities for accessing the benefits of the cloud and Internet. ...
Headquartered in Plainsboro, NJ, Synametrics Technologies has provided IT professionals and computer systems developers since 1997. Based on the success of their initial product offerings (WinSQL and DeltaCopy), the company continues to create and hone innovative products that help its customers get more from their computer applications, databases and infrastructure. To date, over one million users around the world have chosen Synametrics solutions to help power their accelerated business or per...