package marceline.storm.trident.clojure;
import backtype.storm.utils.Utils;
import storm.trident.state.State;
import storm.trident.state.QueryFunction;
import storm.trident.operation.TridentCollector;
import storm.trident.operation.TridentOperationContext;
import storm.trident.tuple.TridentTuple;
import clojure.lang.IFn;
import clojure.lang.RT;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
public class ClojureQueryFunction implements QueryFunction<State, Object> {
List<String> _fnSpec;
List<Object> _params;
QueryFunction _queryFn;
public ClojureQueryFunction(List fnSpec, List<Object> params) {
_fnSpec = fnSpec;
_params = params;
}
@Override
public void prepare(final Map conf, final TridentOperationContext context) {
IFn hof = Utils.loadClojureFn(_fnSpec.get(0), _fnSpec.get(1));
try {
IFn preparer = (IFn) hof.applyTo(RT.seq(_params));
List<Object> args = new ArrayList<Object>() {{
add(conf);
add(context);
}};
_queryFn = (QueryFunction) preparer.applyTo(RT.seq(args));
try {
_queryFn.prepare(conf, context);
} catch (AbstractMethodError ame) {
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public List<Object> batchRetrieve(State state, List<TridentTuple> args) {
return _queryFn.batchRetrieve(state, args);
}
@Override
public void execute(TridentTuple tuple, Object result, TridentCollector tridentCollector) {
_queryFn.execute(tuple, result, tridentCollector);
}
@Override
public void cleanup() {
}
}