Monday, November 30, 2009

EMF and SMM to export code metrics to Sonar and Squale

How to facilitate the integration between code quality measurement tools and code quality reporting tools ?

This is the problem we are faced with at Mia-Software: to address modernization projects, we have developped a lot of parsers creating models of code from which we can compute quality metrics (from COBOL, Natural or VB6 to Smalltalk, C# or Java). But as our customers are interested in getting these metrics in the quality report tool of their choice, we don't want to multiply the development of adhoc bridges (one for each couple "metrics calculator" <-> "report tool")

To reduce the cost of bridging the tools, we chose SMM (Structured Metrics Metamodel) as a pivot. SMM is the OMG/ADM standard for defining metrics related to software and for representing their measurement on existing systems. Its reference EMF implementation can be found in MoDisco, the Eclipse Modeling project focused on discovering models from software assets.

The main classes defined by SMM are quite simple :
- Measure : the definition of an indicator (nb lines of code, cyclomatic complexity, …)
- Scope : the kind of elements on which the indicator can be measured
- Measurand : an element on which an indicator has been measured
- Measurement : the measured value of an indicator
- Observation : who ? how ? when ?
Then, for each measurement tool that we need to integrate with a report tool, we just have to create a SMM model describing the kind of metrics to exchange (instances of Measure and Scope) and a connector to translate the specific export format of the measurement tool to a SMM model containing the measured values (instances of Measurement, Measurand and Scope).

In parallel, we create one generator for each report tool to integrate with. This generator takes the SMM model defining the measures and generates :

• the files declaring the metrics within the report tool
• the files configuring the report tool to integrate the new kind of metrics
• the source code of the component which will import SMM models containing the measurements
At this time we have experimented this approach to import COBOL and VB6 metrics (calculated by Mia-Insight) into the quality report tools Sonar and Squale.

Screenshots : COBOL -> Sonar

Screenshots : COBOL -> Squale

Our conclusion is that SMM fits the need of integration between these kind of tools.

The next step will be the integration of XRadar (suggestions of other report tools are welcome ;-) ).

We also have to solve the problem of metrics aggregation. There are three possibilities :
- aggregation at measurement time
- aggregation in SMM model
- aggregation in report tool
We have already identified pros and cons for each alternative. Depending on the kind of aggregation to perform, experimentation will probabely give an answer !


  1. Nice post . Thanks for the shearing valuable information. I really fiend this type blog. Special thanks to writer.

    Buy Facebook Likes

  2. Nice post . Thanks for the shearing valuable information. I really fiend this type blog. Special thanks to writer. Buy Facebook Likes

  3. My friend mentioned to me your blog, so I thought I’d read it for myself. Very interesting insights, will be back for more!
    buy facebook likes cheap

  4. Thanks for your marvelous posting! I seriously enjoyed reading it, you can be a great author. I will be sure to bookmark your blog and will come back in the foreseeable future. I want to encourage that you continue your great job, have a nice afternoon! buy followers on twitter intended for facebook marketing and advertising you can actually gain twitter followers, Facebook or myspace fans/likes along with Dailymotion landscapes along with remarks. If you would like to help buy followers on twitter, we could enable you to! i am All Social Service provider . I am selling those service on, please take a look Buy Fast Like

  5. Thank you for your amazing post.This post is very helpful for everybody. buy-twitter-followers