= Configuring Logging in Tests
:index-group: Testing Techniques
:jbake-date: 2018-12-05
:jbake-type: page
:jbake-status: published

= embedded.logging.properties

When in embedded mode OpenEJB uses an embedded.logging.properties file
packed in our openejb-core jar which use to configure the logging. This
logging configuration is a bit lighter than the conf/logging.properties
file created in a full standalone OpenEJB setup.

When searching for any config file in the classpath, multiple files with
the same name may exist. OpenEJB will always attempt to favor the one
closest to the openejb.base variable. This variable is set by default to
the current directory where your vm is executing, which is more than
likely the directory of your current module. So simply adding a file
named embedded.logging.properties to your module may be all that you
need to specify a new logging configuration for your tests.

Alternatively, you can set "openejb.logger.external" to "true" as a
system property (will not work as an InitialContext property). Then
OpenEJB will not attempt to configure logging at all and you can
configure logging with Log4j directly using any of its APIs; xml,
properties, or code.

There are a couple good reasons for _not_ replacing the
embedded.logging.properties file.

[arabic]
. If you want to just change 5% of the logging settings, why take
control over the other 95% as well.
. We do occasionally add new logging categories. If you are not
replacing the embedded.logging.properties you will pick these up
automatically when you upgrade.

= Overriding (recommended)

As mentioned in link:embedded-configuration.html[Embedded Configuration]
much can be done with simple overriding. The default
embedded.logging.properties is quite good and there is really no need to
replace it completely if all you want to do is tweak a few values.

You can also put logging tweaks right in your InitialContext properties
like so:

[source,java]
----
Properties p = new Properties();
p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.core.LocalInitialContextFactory");

p.put("log4j.rootLogger", "fatal,C");
p.put("log4j.category.OpenEJB", "warn");
p.put("log4j.category.OpenEJB.options", "info");
p.put("log4j.category.OpenEJB.server", "info");
p.put("log4j.category.OpenEJB.startup", "info");
p.put("log4j.category.OpenEJB.startup.service", "warn");
p.put("log4j.category.OpenEJB.startup.config", "info");
p.put("log4j.category.OpenEJB.hsql", "info");
p.put("log4j.category.CORBA-Adapter", "info");
p.put("log4j.category.Transaction", "warn");
p.put("log4j.category.org.apache.activemq", "error");
p.put("log4j.category.org.apache.geronimo", "error");
p.put("log4j.category.openjpa", "error");
p.put("log4j.appender.C", "org.apache.log4j.ConsoleAppender");
p.put("log4j.appender.C.layout", "org.apache.log4j.SimpleLayout");

Context context = new InitialContext(p);
----

Essentially, everything starting with "log4j." gets applied as overrides
on top of the embedded.logging.properties we find in the classpath. This
makes it possible to easily tweak the log levels while debugging a
particular test.

Note, that InitialContext properties can also be supplied in a
jndi.properties file in the classpath or via system properties. The
overriding order is as follows: 1 = highest, 4 = lowest.

[arabic]
. InitialContext properties
. jndi.properties in classpath
. system propertes
. embedded.logging.properties in classpath

By default there are no logging settings in 1-3, so #4 is the only
source of logging information.

= Default embedded.logging.properties contents

For your purposes, here are the contents of the default
embedded.logging.properties file contained in OpenEJB 3.1.1

[source,properties]
----
log4j.rootLogger           = fatal,C
log4j.category.OpenEJB         = warn
log4j.category.OpenEJB.server      = info
log4j.category.OpenEJB.startup     = info
log4j.category.OpenEJB.startup.service = warn
log4j.category.OpenEJB.startup.config = info
log4j.category.OpenEJB.hsql    = info
log4j.category.CORBA-Adapter       = info
log4j.category.Transaction     = warn
log4j.category.org.apache.activemq = error
log4j.category.org.apache.geronimo = error
log4j.category.openjpa         = error

log4j.appender.C           = org.apache.log4j.ConsoleAppender
log4j.appender.C.layout        = org.apache.log4j.SimpleLayout
----

Here is that file's location in svn as well as all of the previous
versions. Future versions will follow the same pattern.

* http://svn.apache.org/repos/asf/openejb/tags/openejb-3.1.1/container/openejb-core/src/main/resources/embedded.logging.properties
* http://svn.apache.org/repos/asf/openejb/tags/openejb-3.1/container/openejb-core/src/main/resources/embedded.logging.properties
* http://svn.apache.org/repos/asf/openejb/tags/openejb-3.0/container/openejb-core/src/main/resources/embedded.logging.properties
* http://svn.apache.org/repos/asf/openejb/tags/openejb-3.0-beta-2/container/openejb-core/src/main/resources/embedded.logging.properties
* http://svn.apache.org/repos/asf/openejb/tags/openejb-3.0-beta-1/container/openejb-core/src/main/resources/embedded.logging.properties