MQSeries.net :: View topic - Custom Java Node- plugin

apsy · Posted: Mon Oct 11, 2004 8:51 am Post subject:

I have written a experimental custom Java node to read a file and load the contents into a HashMap .

Every time I change my java code , I stop my broker , export my new jar into /<wbimb installpath> /jplugin and re-start my broker.

I see that the constructor in my code gets executed.

e.g: myNode()
{ Note start time;
construct input and output terminals;
while not end of file
{
Read flat file ;
append to hashmap;
}
Note end time ;
Print out timetaken ;
}

Question 1) I see that the whole code block in the constructor gets executed twice. Why is that ?

Queston2 I wanted to use log 4 J for logging debug statements. I used the following lines of code to instantiate the log4 J within my Java Node.

PropertyConfigurator.configure("abc.properties");
dlogger = Logger.getLogger("com.sears.mds.dataLogger");

contents of abc.properties

log4j.appender.root_app1=org.apache.log4j.ConsoleAppender
log4j.logger.com.sears.dataLogger=DEBUG,dataLogger_app1
log4j.appender.root_app1.Threshold=DEBUG
log4j.appender.root_app1.layout=org.apache.log4j.PatternLayout
log4j.logger.com.text.samples.myLogger=DEBUG,dataLogger_app1
log4j.appender.dataLogger_app1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.dataLogger_app1.datePattern='.'yyyyMMdd
log4j.appender.dataLogger_app1.File=d:/logs/mds/myNodeLogger.log
log4j.appender.dataLogger_app1.layout=org.apache.log4j.PatternLayout

It seems to me like the property configurator works, but there seems to be a clash between the
mynode.properties file that gets created when I initially configured my node in the toolkit .
contents of mynode.properties
#This is a generated file.
#The values in this file have syntax: key = value
#User modifications to the values in this file will be preserved
#Wed Oct 06 09:51:37 CDT 2004
OutTerminal.out=out
myNode=myNode
InTerminal.in=in
OutTerminal.failure=failure
As a result, I get errors when I try to deploy my flow.
I tried to edit this file to include my log4j configurations. The editor would not save my changes.
Am I doing something wrong?

Question3 ) If I use MbService API to log my messages, it by default logs it to the wbimb system log. Is this an asynchronous call?.

Question 4If I wanted to re-direct the output messages to a different log , and keep the logging asynchronous, what do I do ?

Thanks
Apsy