How to access an object from the topology context into a bolt when using storm?

Question

We need to pass an object when creating a topology so that the bolt can access that and do some further processing based on that object. Is it possible to pass the object via

Answer 1

I am not very sure what you mean, but your bolt class can always take a parameter on initialization, and you can initialize that with the object you want to pass when creating the topology.

TopologyBuilder builder = new TopologyBuilder();
builder.setSpout( "spout", new mySpout() );
builder.setBolt( "bolt", new myBolt1(myObj) ).shuffleGrouping("spout");

And your bolt constructor could take this object as the argument.

Edit: If you want the data to be accessible without passing it explicitly to a constructor, you can again always make a static class to store this data and access it from the bolt objects