Aug 6, 2015
Rendering BPMN and highlight current task using bpmn.io
With bpmn.io and the Camunda REST API it is really simple to develop a small HTML page that displays a process instance graphically and highlights some activities. In our “JSF Simple Tasklist” snippet we used this to highlight the current Task (like it is done in the Camunda BPM Tasklist): The cool thing – you do not need a lot of code to do this! This is what we do: Handed over the taskId via URL parameter (see Screenshot). Load the Task details and BPMN XML via REST API. Instantiate the BPMN viewer and hand over the XML for rendering Add a CSS class for the activity to be highlighted Load JavaScript/CSS dependencies, we used WebJars, so they are…
Aug 5, 2015
Start and complete a process with the REST API
Please note that this post is getting older and parts are out of date. If you’re looking to use our REST API, you can find updated versions here: Camunda Platform 8: Start a Camunda Platform 8 Process via REST with Webhooks Camunda Platform 7: Start and Step Through a Process with REST (feat. SwaggerUI) If you’ve already downloaded the Camunda BPM platform you’ve already got our invoice example running locally. So I’m going to start with how you might run through that process using our REST API. I’m going to assume that you’ve got some method of making those calls either programmatically or using a RestClient (I’ve used chrome’s advanced rest client to test the calls). So lets begin… Starting…
By Niall Deehan
Aug 3, 2015
Job Prioritization for Asynchronous Processing at Scale
Camunda users process heavy workloads with the process engine. Often this includes asynchronous processing which is handled using the job executor component. The amount of jobs that need to be processed can quickly reach an order of magnitude of millions of jobs per day. To bring order into situations of high job executor load, Camunda BPM 7.4.0 will ship job prioritization. With our first 7.4.0-alpha1 release, you can already have a look at it and give it a try. This article deals with three questions: What is Job Prioritization useful for? How to use Job Prioritization? What will this look like in 7.4.0? The Case for Job Prioritization Up to date, Camunda BPM is used by a growing number of…
Jul 31, 2015
Camunda BPM 7.4.0 Alpha 1 Released
Today we release Camunda BPM 7.4.0-Alpha1. This is the first alpha release previewing the upcoming 7.4.0 Release. The highlights of this release are: DMN (Decision Model and Notation): DMN Engine and browser based Decision Table Editor, Job Priorities: Control execution order of asynchronous Jobs, Enhanced BPMN Support: add Signal Start events, Compensation Event Subprocess, enhanced asynchronous continuations for Multi Instance Activities, Native support for File Variables in Api and Html Forms, Many Bugfixes Overall more than 140 issues were closed. See complete Release Notes in Jira. Download For Free Run with Docker DMN: Decision Model and Notation This is the first release which supports DMN (Decision Model and Notation). DMN is a new OMG (Object Management Group) standard for Business…
By Daniel Meyer
Jul 28, 2015
Setting up a Development Environment for Camunda HTML Forms
Are you developing HTML forms for Camunda Tasklist? Are you re-packaging your application with maven and re-deploying it to Tomcat or WildFly for each HMTL form change? Are you annoyed by this? 🙂 There is hope: this post explains how to setup a development environment which allows you to develop forms inside Camunda Tasklist and refresh your changes without re-packaging and re-deploying your application. We use this kind of setup ourselves when working on the Invoice Example which is provided with the Camunda Distribution. In the following I am assuming that you have setup an application according to the blueprint provided by our Getting Started Guide. Step 1: Adding a Maven Profile for development First you need to add a…
By Daniel Meyer
Jul 7, 2015
How to clean up/purge the camunda history tables
We get this question very often from customers: How can we get rid of old history data that we don’t need anymore? First it’s important to ask: “What do you mean by ‘old data’?”. This is completely business focused and depends on the use of cockpit, who is working with the history data, how reports are generated and maybe even constraints due to legislation. One of our customers – Hamburger Sparkasse (Haspa) – built a solution that is flexible enough to address the issues raised by the questions above: They created a bunch of SQL scripts Created a parameter for the number of days that completed process instances should remain in the database which then moved the old data into a set of archive…
Jun 26, 2015
Deploy a Camunda BPM Docker Image with Amazon Web Services
No one could argue that deploying the Camunda BPM platform to a web server is unmatched in its adrenaline-inducing excitement, but we should spare a thought for those people whose aversion to scripts and consoles has meant that they have never had the opportunity to enjoy Camunda BPM deployments to their fullest. Until now… In this post I’m going to explain in detail how you can deploy Camunda BPM to a server using docker and Amazon Web Services (AWS) and interestingly enough – it doesn’t require so much as a glance at a console cursor. To achieve this we’re going to be using two Amazon services: RDS – to setup the process engine’s database EC2 Container Service – as…
By Niall Deehan
Jun 19, 2015
Spring Boot Support in Camunda – new Community Extension
I am very, very excited about this: the Camunda community now actively collaborates around providing support for Spring Boot. This is extremely cool and allows users to deploy Camunda process engine including the Rest Api and the Webapplication in Spring Boot. The project is in a very early stage, if you want to participate, join the ongoing discussion on the dev list and checkout the sources in GitHub! Many thanks to Oliver Steinhauer who provided an initial implementation that the community decided to collaborate around.
By Daniel Meyer
Jun 15, 2015
Would you use Apache Cassandra for Camunda persistence?
I am currently planning a hack session with people who are interested in using Apache Cassandra as database for Camunda Process engine. Their main motivation for supporting us is that their whole application is running on Apache Cassandra and they want to use Cassandra as persistence provider for their workflows as well. They have extensive experience with Cassandra and want to contribute their work as open source. If the hacksession which will take place at the beginning of July is successful, we would setup a public repository on GitHub were the community could collaborate around this. I have blogged about our friends at Zalando doing work in that direction as well. Would more people be interested in being able to…
By Daniel Meyer
