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Runing btrace in a single command

/ Published in: Java
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Running a btrace script takes two separate steps by default:
1. Running jps to get the Java process ID.
2. Running btrace on the ID.
A simple awk script can merge the two into a single step.

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  1. # instead of running
  2. $ jps 
  3. 18904 Main
  4. 18951 SpringMain
  5. 19055 Jps
  6. $ btrace 18951 jdftm/ReflecTracer.class
  7.  
  8. # We issue (the traced application main class is SpringMain)
  9. $ jps | awk '/SpringMain/{system("btrace " $1 " jdftm/ReflecTracer.class")}'

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