Some useful development tricks for working with LMF

Java Runtime configuration

It is recommended to customize some variables:

export JAVA_OPTS="-Djava.net.preferIPv4Stack=true -Xmx1024m -XX:PermSize=128m -XX:MaxPermSize=256m -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -XX:+HeapDumpOnOutOfMemoryError"

Paths in Windows-based systems

In Windows some paths, the user home for instance, usually contain spaces, which could be problematic with some development environments. Therefore the recommendations are:

• Place your LMF working copy under a path without spaces
  • Tomcat, and maybe other servlet containers, are not happy with such paths
• Configure related tools (gradle, maven and so on) to use a home path also without spaces

Database configuration

Internally LMF uses a relational database to persist the data using a custom and efficient schema.

For instance, for creating such database in PostgreSQL you'd need to execute something like:

# su - postgres
$ psql 
postgres=# CREATE USER lmf WITH PASSWORD 'lmf';
postgres=# CREATE DATABASE lmf WITH OWNER lmf;

Then you'd need to configure the access to it, using the userConfig.properties file or through the web interface under LMF core.

Performance

These [[Performance Tuning|performance tricks]] may be of your interest.

Maven

See Maven for further details.

Hot Deployment / JRebel

See [JRebel] for further details.