Stefan Wittmann · Oct 21, 2016
Zen Mojo 1.1.2 released

I am happy to share the news that Zen Mojo 1.1.2 has been released. This release includes a critical fix for Firefox that we had to get out as fast as possible. No other changes are included to allow easy upgrades. We recommend upgrading to this release if you are running on Zen Mojo 1.1.1.

All upcoming Caché and Ensemble releases will ship with Zen Mojo 1.1.2.

You can download Zen Mojo kits from the WRC distribution page:

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This is a beginner’s guide to the design of a “MicroService” implemented in Ensemble. “MicroService” is a popular phrase these days which has a broad interpretation. My interpretation is: “MicroService” is a “NoSQL Service”. A what? The answer is in the article.

We learnt what the difference is between SQL and NoSQL databases. For me the difference is nearly the same between a SOA Web Service and a “MicroService”. I am going to explain it through an example.

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Istvan Hahn · Oct 12, 2016 12m read

Beginner’s guide to RESTful Application Program Interface (API) design and documentation. Through the example you will learn some common pattern for RESTful API.

Before you read

You need to know

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The goal of this writing was to illustrate how to restore backup before the patch would be applied. The alert notes that:

The risk can be avoided by applying journals from the beginning of the journal file that was switched to at the start of the backup, rather than accepting the default of starting from the journal marker position.

Having non-patched Caché 2015.1.4, I ran sample database backup and restore just to get where I should answer "No". Collecting journal info from the backup log:

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We are interfacing through Ensemble with an application that does not like diacritic signs in text. I have been searching for a way to strip these signs from the HL7 messages that get send to that application.
The problem in short is we have an incoming HL7 message with e.g. é (or ë, á etc), this goes into Ensemble. In the outgoing message the é should be replaced with an e.

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Paul Hula · Oct 10, 2016
Telepath PMEP File

Hello All,

Does anyone have a specification for Telepath PMEP file formats?

They look like this

01|XXX|005|MIC|XXX Microbiology & Mycology|123456|25.08.16 15:06|
03|F|SURNAME|FORNAME|111222333|MRN1|01.01.1950|52 Some Lane|Somewhere|||AA11 1AB|MRN1|01.01.1950

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I have to connect to an external database and I'd like to use the JDBC SQL Gateway.

I followed this tutorial [1] to create a JDBC SQL Gateway and after configured it works as expected, but I don't know

how use this connection into source code. Maybe these other tutorial is related [2] and [3].


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maybe I am not looking in the correct spots, but how should one handle an Exception from a SOAP web service within the Business Process Language? For example I am sending a request to a Web Service to try to get information, but the response I am getting is an Exception like "Patient Not Found".

Is there a function I can call to check the response similar to what I do to check a SQL Snapshot to see if it is valued?


Scott Roth

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Istvan Hahn · Oct 6, 2016 4m read
RESTful Exception Handling

A beginner’s guide to Exception Handling in RESTful web services. The article gives an example how the various error conditions during processing a service request can be handled.

We expect our client – server communication working in a flawless operational condition, running error free software. But we are prepared to handle exceptions. Are we? So far in the examples of the previous sessions were not. We did not care about exceptions. The result? In any error incident it took ages to figure out what the problem is and more importantly how to fix it.

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I'm trying to read PID-3 and route the message based on if a certain prefix existed, but I keep getting Property Does Not Exist.

I've tried

HL7.(PID:PatientIDInternalID()) Contains "COS"

HL7.(PID:PatientIDInternalID(1)) Contains "COS"

HL7.{PID:PatientIDInternalID()} Contains "COS"

HL7.{PID:PatientIDInternalID(1)} Contains "COS"

This is a 2.3 MDM message. Thanks!

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Istvan Hahn · Oct 5, 2016 13m read
RESTful way of data transfer

This article gives a brief introduction how a RESTful service consumer and a RESTful service provider exchange data. It is a beginner’s guide. Data is transferred from a consumer to a provider as parameters of the service. Parameters are part of a service request. The result of the service action a response is returned from a provider to a consumer. Both the service request and response are standard HTTP messages. Since HTTP is a flexible standard regarding to the message contents, RESTful services also enjoy the versatility of data transfer methods.

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Hi All

I have a question on working with dev and prod environments.

After project is ready and signed, I usually migrate outcome to production using the export tool from the studio.

For changes/adding to existing projects, I exclude the production class (as it has some different values differing the dev from the live) and I add the differences manually afterwards.

My questions on migrating are:

Does anyone has (to share) his/her best practice steps on "migrating dev to prod"?

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Cross-origin Resource Sharing (CORS) is one of the basic security features built into browsers. CORS controls accessing resources from a HTML page in domains other than the original domain. It is particularly important for AJAX calls. Since RESTful services can be used as data provider to any AJAX call, you have to be able to control cross-origin access. By default services are not allowed to do CORS. You are going to learn how to enable it for Ensemble RESTful services.

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Preface: our small, but very ambitious company called “Black Mushroom Studio” came up with an idea for an e-commerce project and a mobile app that would let users pay for certain goods/services via a payment aggregator.

What we had initially: an Android app skeleton that, of course, liked communicating via HTTP and JSON, and a payment system with an API – web services with SOAP content.

Goal: make it all work together.

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Can someone please explain the affect of the Failure Timeout on an ensemble business operation with a EnsLib.HL7.Adapter.TCPOutboundAdapter

Is this setting indicating the number of seconds that the operation will attempt to resend a message to a target before it fails?

How does this setting affect message processing of messages that fail because of a missing or failure response code that comes back in an HL7 message response?

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Istvan Hahn · Sep 21, 2016 7m read
REST in Pieces

A beginners guide to develop Ensemble RESTful web services.


Before you start reading this short introduction please go through the on-line documentation of Ensemble with special attention to chapter “Creating REST services and clients with Ensemble”.

The approach in the documentation is undisputable the fastest and easiest way to create RESTful services. As a beginner I went through the documentation and I had several questions. This short article is listing those questions plus my humble answers.

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Hi all,

We're in the process of creating several courses for creating custom business components for productions. This includes custom business operations, BPL processes, and custom business services. Custom Business Operations and Custom Business Services are both aimed at software developers while BPL processes can be also be created by business analysts. What are some gotchas or best practices you've learned that you wish you knew when first building these components?

We'd love to include what you've learned into these courses so others can learn from them as well!

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Ahuja Sagar · Sep 21, 2016
Ensemble Upgrade From v3.0.0

Hi All,

We have an application running on Ensemble, And we want to upgrade to latest version of Ensemble.

Can somebody please outline the process of upgrading from version and all the risks involved?


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Brendan Batchelder · Sep 20, 2016 4m read
Diagnosing Framing Errors

Framing refers to the characters that mark the start and end of an HL7 message (or other types of framed messages). Most HL7 services and operations have a Framing setting that allows the user to define this framing. The most common choices are available as defaults, but with the AsciiMM/NN setting, components can be configured to recognize any framing characters.

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