Examples with State org.apache.storm.trident.state.State used on opensource projects

Example 1 with State

use of org.apache.storm.trident.state.State in project storm by apache.

the class SubtopologyBolt method prepare.

@Override
public void prepare(Map conf, TopologyContext context, BatchOutputCollector batchCollector) {
    int thisComponentNumTasks = context.getComponentTasks(context.getThisComponentId()).size();
    for (Node n : _nodes) {
        if (n.stateInfo != null) {
            State s = n.stateInfo.spec.stateFactory.makeState(conf, context, context.getThisTaskIndex(), thisComponentNumTasks);
            context.setTaskData(n.stateInfo.id, s);
        }
    }
    DirectedSubgraph<Node, Object> subgraph = new DirectedSubgraph(_graph, _nodes, null);
    TopologicalOrderIterator it = new TopologicalOrderIterator<>(subgraph);
    int stateIndex = 0;
    while (it.hasNext()) {
        Node n = (Node) it.next();
        if (n instanceof ProcessorNode) {
            ProcessorNode pn = (ProcessorNode) n;
            String batchGroup = _batchGroups.get(n);
            if (!_myTopologicallyOrdered.containsKey(batchGroup)) {
                _myTopologicallyOrdered.put(batchGroup, new ArrayList());
            }
            _myTopologicallyOrdered.get(batchGroup).add(pn.processor);
            List<String> parentStreams = new ArrayList<>();
            List<Factory> parentFactories = new ArrayList<>();
            for (Node p : TridentUtils.getParents(_graph, n)) {
                parentStreams.add(p.streamId);
                if (_nodes.contains(p)) {
                    parentFactories.add(_outputFactories.get(p));
                } else {
                    if (!_roots.containsKey(p.streamId)) {
                        _roots.put(p.streamId, new InitialReceiver(p.streamId, getSourceOutputFields(context, p.streamId)));
                    }
                    _roots.get(p.streamId).addReceiver(pn.processor);
                    parentFactories.add(_roots.get(p.streamId).getOutputFactory());
                }
            }
            List<TupleReceiver> targets = new ArrayList<>();
            boolean outgoingNode = false;
            for (Node cn : TridentUtils.getChildren(_graph, n)) {
                if (_nodes.contains(cn)) {
                    targets.add(((ProcessorNode) cn).processor);
                } else {
                    outgoingNode = true;
                }
            }
            if (outgoingNode) {
                targets.add(new BridgeReceiver(batchCollector));
            }
            TridentContext triContext = new TridentContext(pn.selfOutFields, parentFactories, parentStreams, targets, pn.streamId, stateIndex, batchCollector);
            pn.processor.prepare(conf, context, triContext);
            _outputFactories.put(n, pn.processor.getOutputFactory());
        }
        stateIndex++;
    }
// TODO: get prepared one time into executor data... need to avoid the ser/deser
// for each task (probably need storm to support boltfactory)
}