def on_service_init(self, service):
        self.port = service.port
Validates a single node excluding links.
dataset/ETHPy150Open dieseldev/diesel/diesel/protocols/http/core.py/HttpServer.on_service_init--crossover with--dataset/ETHPy150Open cloudera/hue/apps/oozie/src/oozie/views/api.py/_validate_node_json