bash - how to filter java exception info
- by Michael Mao
Hi all:
We've got a multi-agent Java environment where different agent would most likely produce all sorts of exceptions thrown to stderr.
Here is a sample taken from the huge exception log
**java.security.AccessControlException: access denied (java.io.FilePermission ..\tournament\Driver\HotelRoomAnalyser.class read)**
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.length(Unknown Source)
at emarket.client.EmarketSandbox$SandboxFileLoader.loadClassData(EmarketSandbox.java:218)
at emarket.client.EmarketSandbox$SandboxFileLoader.loadClass(EmarketSandbox.java:199)
at java.lang.ClassLoader.loadClass(Unknown Source)
**java.security.AccessControlException: access denied (java.io.FilePermission ..\tournament\Driver\HotelRoomAnalyser.class read)**
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.length(Unknown Source)
at emarket.client.EmarketSandbox$SandboxFileLoader.loadClassData(EmarketSandbox.java:218)
at emarket.client.EmarketSandbox$SandboxFileLoader.loadClass(EmarketSandbox.java:199)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at MySmarterAgent.hotelRoomBookings(MySmarterAgent.java:108)
fortunately all top-tier exceptions are denoted by no leading spaces, as wrapped by ** above.
My concern is to get all of the top-tier exception name (delimited by colon :), together with the first line below which contains something like
at emarket.client.EmarketSandbox$SandboxFileLoader.loadClassData(EmarketSandbox.java:218)
Basically, something with padded style, starts with "at" and ends with ".java:108"
So this info can be forwarded to the owner of that error-prone agent and let him/her fix it.
My code in ~/.bashrc is incompleted now :
alias startmatch='java -jar "emarket.jar" ../tournament 100';
function geterrors()
{
startmatch 2>"$1";
a=0;
while read line
do
if true;
then a=$(($a+1));
echo $a;
fi;
done
}
What it does now is to redirect all stderr to a text file specified by the first argument passed in, and after that, parse that text file line by line, if certain conditions returns true, echo only that line.
And I am stuck with what to do inside the loop.
Any suggestion is much appreciates, any hint is welcomed.
