JarScan, scan all JAR files in all subfolders for specific class

Question

We are seeing an older version of a class being used, although we had the latest one deploy. To scan all JAR files in all subfolders of an application server, how do we writ

Answer 1

Now to answer this question here is a simple shell command that did that for us.

for jarFile in $(
    ls -R | 
    awk '
        match($0, ".*:") { 
            folder=$0 
        } 
        ! match($0, ".*:") {
            print folder$0 
        }' | 
        grep "\.jar" | 
        sed -e "s/:/\//g"
); 
do  
    unzip -l $jarFile; 
done | 
awk '
    match($0, "Archive.*") { 
        jar=$0 
    } 
    ! match($0, "Archive.*") {
        print jar" : "$0 
    }' | 
grep org.jboss.Main

Answer 2

Years ago I wrote a utility classfind to resolve issues like this. Set your classpath to point to your .jar set, and classfind will tell you in which jars it'll find a particular class.

example% classfind -c Document
/usr/java/j2sdk1.4.0/jre/lib/rt.jar -> org.w3c.dom.Document
/usr/java/j2sdk1.4.0/jre/lib/rt.jar -> javax.swing.text.Document