4.2. Remote Console

4. Understanding ServiceMix Kernel

4.4. Deployer

4.3. Logging system

Apache ServiceMix Kernel provides a powerful logging system based on OPS4j Pax Logging.

In addition to being a standard OSGi Log service, it supports the following APIs:

• Apache Commons Logging
• SLF4J
• Apache Log4j
• Java Util Logging

The Kernel also comes with a set of console commands that can be used to display, view and change the log levels.

Configuration

The configuration of the logging system uses a standard Log4j configuration file at the following location:

[SMX4KNL:kernel]/etc/org.ops4j.pax.logging.cfg

You can edit this file at runtime and any change will be reloaded and be effective immediately.

Commands

The log subshell comes with 3 commands:

• ld or log/display: display the last log entries
• lde or log/display-exception: display the last exception from the log
• log/get: show the log levels
• log/set: set the log levels

For example, if you want to debug something, you might want to run the following commands:

> log/set DEBUG
... do something ...
> ld

Note that the log levels set using the log set commands are not persistent and will be lost upon restart.
To configure those in a persistent way, you should edit the configuration file mentioned above.
SMX4KNL:#top

4.2. Remote Console

4. Understanding ServiceMix Kernel

4.4. Deployer