Building Python Real time Applications with Storm

Installing Winpdb

Activate your Petrel virtual environment and then use pip to install it:

source <virtualenv directory>/bin/activate
pip install winpdb

Add Winpdb breakpoint

In the splitsentence.py file, add the following at the beginning of the run() function:

import rpdb2
rpdb2.start_embedded_debugger('password')

The 'password' value can be anything; this is simply the password that you will use in the next step to attach to splitsentence.py.

When this line of code executes, the script will freeze for a default period of 5 minutes, waiting for a debugger to attach.

Launching and attaching the debugger

Now run the topology:

petrel submit --config topology.yaml

Once you see log messages from the spout, you will know that the topology is up and running, ...