{
    "description": "Monitoring a standalone connection", 
    "phases": [
        {
            "outcome": {
                "events": [
                    {
                        "topology_opening_event": {
                            "topologyId": "42"
                        }
                    }, 
                    {
                        "topology_description_changed_event": {
                            "newDescription": {
                                "servers": [
                                    {
                                        "address": "a:27017", 
                                        "arbiters": [], 
                                        "hosts": [], 
                                        "passives": [], 
                                        "type": "Unknown"
                                    }
                                ], 
                                "topologyType": "Single"
                            }, 
                            "previousDescription": {
                                "servers": [], 
                                "topologyType": "Unknown"
                            }, 
                            "topologyId": "42"
                        }
                    }, 
                    {
                        "server_opening_event": {
                            "address": "a:27017", 
                            "topologyId": "42"
                        }
                    }, 
                    {
                        "server_description_changed_event": {
                            "address": "a:27017", 
                            "newDescription": {
                                "address": "a:27017", 
                                "arbiters": [], 
                                "hosts": [], 
                                "passives": [], 
                                "type": "Standalone"
                            }, 
                            "previousDescription": {
                                "address": "a:27017", 
                                "arbiters": [], 
                                "hosts": [], 
                                "passives": [], 
                                "type": "Unknown"
                            }, 
                            "topologyId": "42"
                        }
                    }, 
                    {
                        "topology_description_changed_event": {
                            "newDescription": {
                                "servers": [
                                    {
                                        "address": "a:27017", 
                                        "arbiters": [], 
                                        "hosts": [], 
                                        "passives": [], 
                                        "type": "Standalone"
                                    }
                                ], 
                                "topologyType": "Single"
                            }, 
                            "previousDescription": {
                                "servers": [
                                    {
                                        "address": "a:27017", 
                                        "arbiters": [], 
                                        "hosts": [], 
                                        "passives": [], 
                                        "type": "Unknown"
                                    }
                                ], 
                                "topologyType": "Single"
                            }, 
                            "topologyId": "42"
                        }
                    }
                ]
            }, 
            "responses": [
                [
                    "a:27017", 
                    {
                        "ismaster": true, 
                        "maxWireVersion": 4, 
                        "minWireVersion": 0, 
                        "ok": 1
                    }
                ]
            ]
        }
    ], 
    "uri": "mongodb://a:27017"
}