Engineering Excellence

All Camunda blog posts tagged with Engineering Excellence.

Apr 24, 2015

Camunda BPM 7.3.0-alpha3 released

A new alpha release of our open source BPM and Workflow platform is available for download. The highlights of this release are: Process Engine Java and REST API Process-level authorizations: define ACL-like authorizations for restricting possible interactions with process-related resources (Process Definitions, Process Instances, Tasks …), in both Java and REST API. Deep tissue refactoring of implementation of Multi Instance constructs in process engine. Many, many bug fixes related to multi instance, event sub processes, boundary events and compensation. API for process instance repair: Modify a process instance’s execution structure through the ability to start and cancel activities in a flexible way. Job Executor Threadpool can be configured for shared process engine in Apache Tomcat Improved Error Handling: call activities…

By Daniel Meyer

Engineering Excellence

Mar 17, 2015

New Camunda Workbench Release – Adds Stepping in Debugger

After a one day hack session, Nico and myself are proud to release a new version of Camunda Workbench. The Highlights of this Release are: Upgrade bpmn.io to v0.9.0 Create a new process Debugger now has stepping support Breakpoints after activities Display the type of variables Enhanced Script Editing What is Camunda Workbench? Camunda Workbench is the next big thing in browser-based tooling for BPMN based process automation 🙂 But most and foremost: Workbench is AWESOME! It brings use cases around modeling and execution of processes close together. In workbench you can model a process, deploy it to Camunda BPM Process Engine and then debug it in an interactive way. See for yourself: Camunda Workbench – Create and debug a…

By Daniel Meyer

Engineering Excellence

Mar 5, 2015

Camunda BPM 7.3.0-alpha2 released

A new alpha release of our open source BPM and Workflow platform is available for download. The highlights of this release are: Process Engine and Rest API Native JSON and XML Variable Value Types Improved Sorting: specify multiple sort parameters in Rest API, sort task by variable value Historic Job Log Support for databases: Oracle 12c Partially Order Historic Activity Instances by occurrence Cockpit UI improvements Advanced Process Instance Search (enterprise feature) Tasklist Sort by multiple parameters Sort by variable value Admin Browse Users by Group JavaScript SDK Add group resource Support local variables The full release notes can retrieved from Jira. The known issues as well. You can download Camunda, run it with Docker or add it to your…

By Daniel Meyer

Engineering Excellence

Feb 17, 2015

Feedback wanted: Camunda BPM and Business Rules

Have you ever used the business rules task in BPMN? Are your company’s business rules closely related to your processes? Many of our users will answer these questions with a ‘yes’. With the new DMN standard for decision management and business rules being close to the final release at OMG, the whole topic has recently been getting increased attention. The DMN (Decision Model and Notation) standard has been built in a way so that it can easily interact and integrate with BPMN. Camunda BPM is widely considered a great BPMN engine. We have recently added the CMMN standard for case management to this engine, which was a great success for our users. Now we are thinking about adding a solution…

By Robert Gimbel

Engineering Excellence

Feb 9, 2015

{ json : everywhere } – How to use JSON in a process

Since Camunda BPM platform 7.2 it is very easy to read, write and manipulate JSON objects by using Camunda Spin. Among other things, this feature is used to serialize Java objects inside a process instance in the process engine. But what if you want to use JSON Variables without mapping to Java objects? With the next alpha release we will introduce a new ValueType “json” (and “xml” but that is an other story). In this post I demonstrate how you can use the JSON value type to implement HTML Forms which work with a JSON Variable, implement BPMN Sequence Flow conditions based on the properties of the JSON Variable. Example Process In this post I use the following example process:…

By Roman Smirnov

Engineering Excellence

Feb 5, 2015

Data mapping and transformation with Camunda Spin and Java 8

Working with text based data formats such as Xml and JSON is a common requirement when implementing BPMN processes. Since version 7.2 Camunda provides an optional library which is called Camunda Spin. Spin is a lightweight wrapper library which provides a easy to use API when working with text based data formats such as XML and JSON. In this post I show how the Camunda Spin can be used for implementing data transformations and mapping in combination with the Java 8 Stream processing API and contrast this to the classical Java 6 / 7 way of doing it. Example The example we use is how to transform a list of The Big Bang Theory episodes (provided as…

By Daniel Meyer

Engineering Excellence

Feb 3, 2015

The symbiosis of test and documentation

We want to build a library of reusable widgets, which are tested and documented. The components of the Tasklist search are examples for such widgets: This blog entry describes how we document and test widgets and make sure that tests and documentation stay in sync. Tests With E2E tests we specify and test the desired behavior of the widgets. For our angular widgets, we use Protractor. E2E tests interact with a webpage, e.g. by clicking on links and buttons or typing text. This simulates the user behavior. To run these tests, we have to create the webpages the tests use. These webpages display the widget in the environment we want to test. Documentation For the documentation, we describe the interface…

By Sebastian Stamm

Engineering Excellence

Feb 2, 2015

Gracefully Cancelling a Process Instance

Cancelling a running process instance in Camunda is easy: DELETE /process-instance/{id} or, using Java API: RuntimeService.deleteProcessInstance(String, String) this will simply delete the process instance and remove it from the database. Sometimes this is exactly what you need. However: what if you want to cancel the process instance gracefully? Gracefully in the sense that the effects it has had on the outside world are undone? The answer to this is compensation. In this post I discuss two ways to implement compensation. Internal Compensation Modeling compensation inside the process itself: The compensation undoes the effects of the process so far. This is usually modeled in a way where you attach a compensation handler to those service tasks which have effects on…

By Daniel Meyer

Engineering Excellence

Jan 27, 2015

Camunda BPM 7.3.0-alpha1 released

The first alpha release in the 7.3 branch is ready! This is what’s inside: New Documentation Case Management Getting Started Tutorial (Docs) Multi Tenancy (Docs) Process Engine Features Namespaces in XPath (CAM-2342) Typed Variable API in CDI Module (CAM-3152, contribution by Michael Scholz) Support for CMMN Manual Activation Rule (CAM-3169) Use BPMN Call Activity for starting a CMMN Case Instance (CAM-3353) Bugfixes Multi Instance (CAM-986, contribution by Ronny Bräunlich) Variable Serialization (CAM-3167, CAM-3174, CAM-3176, CAM-3179) Cockpit Maintenance Upgrade to Bootstrap 3 (See “Known Issues” below) Switched from Angular UI to Angular Bootstrap (See “Known Issues” below) Support for requirejs-angular-define deprecated Features Improved startup time: All Javascript resources are now minified (including plugins) Advanced Process Instance Search (CAM-2697, enterprise edition only) Camunda Tasklist Features Create a standalone…

By Daniel Meyer

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