Stepping into the code it looks like all the classes inside a given module in
my NetBeans RCP app get placed in their own context. Can someone give me a
more detailed explanation of a Context and what it is based upon? I need to
understand why it is a different context for each module.
If I change the code in my factory class as shown below to store the
LoggerContext returned from the initialize method and then provide a static
method to return a logger based upon the saved LoggerContext that all my
classes throughout the various modules will use, then it seems to work.
public final class MyLoggerFactory {
private static LoggerContext loggerContext;
public static void logAppInfo() {
InputStream is = MyLogFactory.class.getResourceAsStream("log4j2.xml");
ConfigurationSource source = new ConfigurationSource(is);
loggerContext =
Configurator.initialize(MyLogFactory.class.getClassLoader(), source);
}
Public static Logger getLogger(String name) {
Return loggerContext.getLogger(name);
}
}
I wish I could just programmatically add the package that I have my
configuration file in to the classpath and bypass all of this but I haven't
been able to figure out how to do that yet. I reason I don't put the
configuration file in the root is because I will be sharing the package across
all of my applications.
Blaine
From: Blaine Bergeson (bbergeson)
Sent: Thursday, January 22, 2015 4:55 PM
To: [email protected]
Subject: RE: Programmatically loading of the configuration file
Well, my previous solution works great for normal applications but it does not
work for NetBeans RCP apps. I placed the package that contains the class and
configuration file in a module and then made the package visible to other
modules. I also modified the code to read the configuration file into a stream
from the module jar file and from what I can tell it is finding it and reading
in but I still get the error message:
ERROR No log4j2 configuration file found. Using default configuration: logging
only errors to the console.
Any ideas? In the meantime I will keep working at it.
Thx Blaine
From: Blaine Bergeson (bbergeson)
Sent: Thursday, January 22, 2015 1:42 PM
To: [email protected]<mailto:[email protected]>
Subject: RE: Programmatically loading of the configuration file
I was able to get the following code to work. This code was placed in a method
in a class that was in the same package as the log4j2.xml file. I call this
method in the main entry point of my application before getting any loggers. I
had to do a google search to find out about the Configurator. Maybe it is in
the documentation on the website but I didn't see it mentioned anywhere.
InputStream is = MyLogFactory.class.getResourceAsStream("log4j2.xml");
ConfigurationSource source = new ConfigurationSource(is);
Configurator.initialize(MyLogFactory.class.getClassLoader(), source);
Thx Blaine
From: Blaine Bergeson (bbergeson)
Sent: Thursday, January 22, 2015 9:38 AM
To: [email protected]<mailto:[email protected]>
Subject: Programmatically loading of the configuration file
I can't seem to load a configuration file? The reason I am doing this is
because I have my configuration file in a package that is not on the default
classpath. Adding the package to the classpath is not straight forward. Also,
I don't want to add a system property or environment variable because we will
be reusing this package throughout all of our projects. So the idea is that
this package will just be pulled into a project and it will contain the
configuration file along with a class that will add the correct items to the
context map and will load the configuration file. The developer should just be
able to include the package and they are off and running.
I am using the following code to load the config file which resides in the same
package as the class that this method is part of, but it is not working. As I
step through the code I can see that inside ConfigurationSource the stream is
loaded correctly with the contents of my file so I know that it found it but
when the getContext line is executed I get an error saying that it could not
locate a configuration file. What am I missing?
try {
InputStream is =
MyLogFactory.class.getResourceAsStream("log4j2.xml");
ConfigurationSource source = new ConfigurationSource(is);
Configuration config =
XmlConfigurationFactory.getInstance().getConfiguration(source);
LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
ctx.stop();
ctx.start(config);
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
Thx Blaine
