VOSibilities

This talk describes BPMN’s concept of boundary events, how they should be used, and how they are related to events that are in the normal sequence flow and to event subprocesses. I also describe the difference between interrupting and non-interrupting boundary events and how processes that use boundary events are mapped to BPEL.

 

 CTOT 35: Boundary Events [39:55m]: Play Now | Play in Popup | Download (13)

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Service-oriented BPM is all about using and providing services. Even tasks done by people are modeled as services. Services use and return XML documents. This means that every decision, every loop condition and generally every use of data has to be able to pull the appropriate data out of XML documents. This is the job of XPath. Many people only have a rudimentary knowledge is XPath, letting their tools generate it for them, but a more complete understanding of the language can help you make simpler processes and allow you a greater understanding is what is going on at runtime. Use the links below to either view a recording of this episode of CTO Tuesdays or just read the slides (the last link).

 

 CTOT 34: XPath [48:27m]: Play Now | Play in Popup | Download (51)

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 CTOT 34: XPath: Download (6)

In this week’s CTO Tuesday, I addressed the question of whether the architectural style called “REST” is well suited to BPM. I’ll save you the suspense and tell you the answer is no. That isn’t to say that ActiveVOS doesn’t support REST. It does. But if you have a choice, should you follow that style? That is where the answer is no.

Contrary to many of the APIs that call themselves REST-based, REST means more than using HTTP GET to call the service and getting plain XML documents back as results. The talk describes the five key principals of REST, including the most important one, which is called HATEOAS. It is an interesting principal that works well for the Web, but it is antithetical to design-time type checking. In fact the REST style is, in general, in conflict with any kind of design-time typing (Roy Fielding refers to typing as “out-of-band” information that creates a tight coupling between client and server).

However, design-time typing is just part of a well-defined service contract and good service contracts are one of the most important characteristics of a service-oriented architecture. I describe this more fully in the talk and also describe the critical value of design-time typing for BPM. I also show how fragile business processes become when they have to depend on REST.

You can view the talk using one of the formats below or just look at the slides (the PDF at the bottom).

 

 CTOT 33: is Rest Right for BPM? [35:10m]: Play Now | Play in Popup | Download (105)

 CTOT 33: is Rest Right for BPM? [35:10m]: Download (76)

 CTOT 33: is Rest Right for BPM?: Download (70)

A number of standards efforts related to BPM are nearing completion of major milestones. This includes 4 standards efforts in 3 different standards development organizations:

• OASIS: BPEL4People 1.1 and WS-HumanTask 1.1
• OMG: BPMN 2.0
• WfMC: XPDL 2.2
• OASIS: SCA 1.1

In this week’s CTO Tuesdays, I describe the current state of each of these efforts along with a brief description of the history and main goals of these standards. Here is a recording of the presentation and a copy of the slides.

 

 CTO 32: BPM Standards Update [50:26m]: Play Now | Play in Popup | Download (177)

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In this recording of CTO Tuesdays, I describe the history of the key standards that are important for SOA, such as XML (starting back with SGML), XML Schema, SOAP, WSDL and BPEL. I also describe some of the key architectural characteristics of SOA that drove the standards, as well as some of the standards-making politics that was peculiar to service-oriented standards. If you are curious about the history of SOA and its related standards, you may find this talk to be interesting.

 

 CTOT 31: History of SOA, part 2 [43:07m]: Play Now | Play in Popup | Download (180)

 CTOT 31: History of SOA, part 2 [55:20m]: Download (53)

 CTOT 31: History of SOA, part 2: Download (73)

 CTOT 31: History of SOA, part 2: Download (93)

In this recording of CTO Tuesdays, the BPMS podcast, Michael Rowley describes how we got here — taking a special look at previous attempts to solve some core development problems. Whatever your interest: SOA, BPM, application development, even just a passing historical curiosity, you will want to watch this (and future) episodes.

 

 CTO Tuesdays #30: SOA , part 1 [50:32m]: Play Now | Play in Popup | Download (277)

 CTO Tuesdays #30: SOA , part 1 [50:32m]: Download (78)

 CTO Tuesdays #30: SOA , part 1: Download (144)

 CTO Tuesdays #30: SOA , part 1: Download (111)

OK, OK…I know. The pun on SOAP and soap opera is a little much. But doesn’t the SOA world feel like a never-ending, overwrought daytime TV drama?

I mean, c’mon. Nobody can decide if SOA is dead or alive…if it’s a product (or set of products) or if it’s JBOI (just a bunch of ideas, a pun on “JBOD.” I just can’t help myself.).

So, starting tomorrow on CTO Tuesdays, the BPM podcast, Michael Rowley will begin another “miniseries” within the larger podcast that begins with the very basics of SOA and builds over time to paint a complete picture of this much discussed and often misunderstood development approach. We intend this as a primer for both new and expert users and we are excited that the recurring SOA topics will expand CTO Tuesdays’ regular line-up of BPM technology talks.

Register for CTO Tuesdays at http://www.activevos.com/ctot and, as always, you can return to this blog for replays. But we hope you can join us live because we expect the discussion after Michael’s presentation on these topics to be very lively and we hope to have you join in the discussion.

If you’ve been attending the live recordings of CTO Tuesdays, our BPM podcast, and/or watching the replays, you know that we have stuck to our knitting for the most part: detailed technical discussions of BPM technology.

Starting with last week’s CTO Tuesdays and continuing with the episode posted below, we have increased our range to crucial technical decisions for BPM users which may have very long-term effects.

We are, to put it bluntly, very concerned that the marketplace is receiving — and accepting — incorrect information about the real relationship between BPEL and BPMN 2.0. Last week, Michael Rowley dispelled this myth in the abstract. This week, Michael has gone further: he actually shows what a two-toolset, two-engine BPMS environment with only a fig-leaf of integration looks like, using Oracle’s BPM Suite 11g and SOA Suite 11g as the poster children.

Yes, Oracle is a competitor. And yes, we have a “dog in the hunt,” as they say. Therefore, for sure, we have an opinion.

None of that undoes the fact that users should consider alternative points of view — views based, as we attempt to do, on the exact text and meaning of the BPMN 2.0 specification. And the fact that we have an opinion — and a product based on that belief — doesn’t undo the fact that much of the argument that BPMN should execute directly and that BPEL is passe is as self-serving as anything we may say.

So, I urge you to watch the replay of CTO Tuesdays attached to this post and to consider the alternative arguments we make. We’re not going to convince everybody, but we truly believe that the people who do consider their long-term BPMS strategy will find that BPMN as notation with BPEL execution is the better alternative.

 

 CTO Tuesdays #29: Oracle: BPMN and BPEL [41:20m]: Play Now | Play in Popup | Download (304)

 CTO Tuesdays #29: Oracle: BPMN and BPEL [41:20m]: Download (78)

 CTO Tuesdays #29: Oracle: BPMN and BPEL [41:20m]: Download (260)

 CTO Tuesdays #29: Oracle: BPMN and BPEL: Download (137)

If you follow Active Endpoints and ActiveVOS on the web and/or in social media, you know we aren’t timid about…well…anything. We try hard, however, to make sure that as we forcefully make our points we are backing them up not just with emotion (a remarkably clarifying attribute often missing vendors’ discussions of technology) but also with hard facts.

You can see the very best of that loud-but-authentic aesthetic at work in episode 28 of CTO Tuesdays, the BPM podcast.

For too long — and, frankly, for reasons that mystify me — some voices have spoken of a “conflict” between BPMN and BPEL. It has always seemed to me that those points of view — that BPMN 2.0 is somehow a “successor” or “replacment” for BPEL –  have an agenda that’s more about their preferred results in the marketplace than about the “best” or the “right” thing for users. IOW, politicking is at play.

But, as we all know, in politics, negative campaigning works. “BPEL is dead;” “BPMN 2.0 execution obviates BPEL.” These misstatements have gained far more attention than they deserve. They have escalated to the level of myth — or worse, conventional wisdom — both of which can have lives very separate from reality.

Our response: BPMN 2.0 is better with BPEL execution for users for a plethora of reasons. Far from dead, BPEL’s fundamental mistake of not specifying a visual notation is cured by BPMN 2.0. And BPMN 2.0 achieves its highest likelihood of success when coupled with BPEL execution.

Still, the myth that these two crucial standards are in conflict persists. Watch this podcast replay to see and hear Michael Rowley debunk these myths — passionately and accurately.

And be sure to join us next week for episode 29, titled “Oracle’s misguided approach to BPMN and BPEL” for even more myth-busting. Register at http://www.activevos.com/ctot.

 

 CTO Tuesdays #28: BPEL BPMN myths [56:26m]: Play Now | Play in Popup | Download (156)

 CTO Tuesdays #28: BPEL BPMN myths [56:26m]: Download (39)

 CTO Tuesdays #28: BPEL BPMN myths [56:26m]: Download (222)

 CTO Tuesdays #28: BPEL BPMN myths: Download (90)

Next Tuesday, June 22, at noon EDT, Active Endpoints CTO Michael Rowley will present “Debunking the myth of conflict between BPMN and BPEL.”

In this talk, Michael will address the fact that some people believe that there is a conflict between using BPMN and BPEL for business processes. He will show how in the latest 2.0 version of the BPMN standard, substantial work has been done to bring the two into alignment and how, according to the latest public draft of the standard, “complete conformance” for BPMN actually requires that it be executable using BPEL.

As they say, you’ve heard the rest…now come listen to the best. We are going to clear the air for users about this myth, which has sometimes been perpetrated by folks with an agenda for BPMN that’s different from what the standard actually intends.

Register for CTO Tuesdays at http://www.activevos.com/ctot. Seats aren’t limited…and you don’t have to hurry.

But I do want to encourage you to join us for the recording of the June 22 podcast because the discussion is sure to be lively. Plus, you’ll want to be caught up on podcasts because the next podcast after this one will be even more incendiary. Michael will be nominating a poster child for a poor approach to integrating BPMN and BPEL: Oracle BPM Suite 11g.

So, that’s two not-to-be-missed episodes of CTO Tuesdays that’ll “hot up” your summer. Who’s made you a better offer lately?

We are pleased to present the recording of the 27th episode of CTO Tuesdays, the BPM podcast from Active Endpoints.

In this talk, Michael Rowley, Active Endpoints’ CTO discusses how a business process management suite (BPMS) can provide the infrastructure necessary to survive serious disruptions.

There are several previous CTO Tuesdays episodes which are related to this topic and which you might also find interesting:

• CTO Tuesdays #16: The state of BPMS state: persistence for process
• CTO Tuesdays #17: How BPMSs support long-running business
• CTO Tuesdays #25: BPM 911 – how a BPMS calls for help

Together, these podcasts make a compelling case that BPM-style development has the features and capabilities necessary for enterprises to be comfortable placing their most crucial processes on BPM suites.

Please register for next week’s live recording of the podcast at http://www.activevos.com/ctot.

 

 CTO Tuesdays #27: BPMS and disaster recovery [35:04m]: Play Now | Play in Popup | Download (238)

 CTO Tuesdays #27: BPMS and disaster recovery [35:04m]: Download (33)

 CTO Tuesdays #27: BPMS and disaster recovery [35:04m]: Download (237)

 CTO Tuesdays #27: BPMS and disaster recovery: Download (127)

Next Tuesday, June 15, at 1pm EDT (10am PDT, 17:00 GMT) our next edition of CTO Tuesdays, the BPM podcast, will present “BPMSs and Disaster Recovery”

Running a BPMS in a cluster of machines can help a system continue to operate even when a single machine goes down, but what can you do if an entire data center goes offline? In this talk, Michael Rowley, Active Endpoints’ CTO, will describe a deployment option that permits the BPMS runs in multiple geographically distributed clusters so that the loss of a data center does not prevent access to the BPMS. Michael will also describe how such a configuration can also be used to handle increased loads when all sites are online.

Register for CTO Tuesdays here: http://www.activevos.com/ctot. Please note our special time this week. Instead of noon EDT (9am PDT), we are holding the live recording of the podcast at 1pm EDT (10am PDT).

Episode 26 of CTO Tuesdays, the BPM podcast, is a must see.

Michael Rowley discusses how WS-HumanTask, coupled with capabilities provided by JSON and AJAX make it possible to eliminate presentation tier services on application servers for worklist management and process initiation in BPMSs.

It’s a look into how the browser, courtesy of AJAX techniques, has become so powerful for presentation logic that it has obviated the need for extra server-side work. While that may not be the latest news, what is fascinating is the application of these capabilities to BPM — and the inside look at the protocol enabled by the move of presentation logic to the client.

A note: I had a problem with the recoding of this podcast. The bad news is for the first couple of minutes, you’ll hear me give my welcome and introduction to the webinar, but you won’t see my PowerPoint slides. The good news is, once Michael begins his talk, you will see everything perfectly.

Update: During the Q&A in this episode, a user asks about parsing JSON on the server side. One of our engineers, PJ, heard that question and offers this answer:

Here’s a link to the JSON specs and libs and links to for parsing in Java, C, C++, ASP, PHP, etc.: http://json.org/

In ActiveVOS, you do not need to parse JSON because it is automatically converted to XML by the ActiveVOS engine and passed into the Receive (or onEvent) activity in your process. So, in ActiveVOS, one works with XML using XQuery & XPath.

For those using REST based services and want to parse JSON or respond with JSON, they can use the following extension functions:abx:jsonToXml(jsonStr) -> returns XML element
abx:xmlToJson(xmlElement) -> return JSON string

For more information, in ActiveVOS’s Expression dialog picklist, see Functions->BPEL->ActiveVOS->JSON

PJ also notes that we have documentation on using JSON in ActiveVOS at http://www.activevos.com/dev/sdks/XML-JSON-Binding/docs/Part1-ActiveVOS-XML-JSON-API.html and sample code in our SDKs at http://www.activevos.com/developers-sdks.php.

Thanks, PJ.

 

 CTO Tuesdays #26: Eliminating the presentation tier [44:00m]: Play Now | Play in Popup | Download (244)

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 CTO Tuesdays #26: Eliminating the presentation tier: Download (148)

On the next episode of CTO Tuesdays, the BPM podcast, Active Endpoints CTO Michael Rowley will discuss how to eliminate the presentation tier when access worklists.

Typical web applications have a service tier and a presentation tier on the application server. However, AJAX technologies have made it possible to move more presentation logic to the web browser. Michael will describe how ActiveVOS has used these techniques to completely eliminate the presentation tier for our worklist application.

Sign up (free!) for CTO Tuesdays at http://www.activevos.com/ctot.

On CTO Tuesdays #25, Active Endpoints CTO Michael Rowley discusses BPMS alert monitors and services which can be used when the BPMS detects issues in running processes.

 

 CTO Tuesdays #25: BPM 911 - how a BPMS calls for help [33:28m]: Play Now | Play in Popup | Download (269)

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