streamBuilder.addField(new TypedField("a", Type.getPrimitive(Type.TypeName.INT)));
streamBuilder.setFormat(new FormatSpec("delimited"));
streamBuilder.setLocal(true);
streamBuilder.setSourceType(StreamSourceType.Source);
streamBuilder.setSource("tail(\"" + sourceFilename + "\")");
StreamSymbol inputStream = streamBuilder.build();
getSymbolTable().addSymbol(inputStream);
LocalEnvironment env = getEnvironment();
env.connect();