public async Task RunAsync(DocumentClient client, GraphAction act, TraceWriter log, ExecutionContext context)
{
//load query map from local file - could be changed to Azure Storage or http endpoint
//debug file location
//string queriesFilePath = context.FunctionDirectory.Replace(context.FunctionName, "content\\querymaps.json");
//production file location
string queriesFilePath = context.FunctionDirectory.Replace(context.FunctionName, "bin\\content\\querymaps.json");
string jsontxt = (File.ReadAllText(queriesFilePath));
string GremlinQuery = "";
try {
//find the correct query by entity and action
DataSet queries = JsonConvert.DeserializeObject <DataSet>(jsontxt);
DataTable qryTbl = queries.Tables["queries"];
GremlinQuery = qryTbl.Select($"entity='{act.entity.ToLower()}' and action='{act.action.ToLower()}'")[0]["query"].ToString();
//id = 0, property = 1, value = 2
//do the string replacement
GremlinQuery = String.Format(GremlinQuery, act.id, act.property, act.value);
}
catch (Exception err)
{
log.Info(err.Message);
this.JSONResults = "{'error': '" + err.Message + "'}";
return;
}
//setup query
//DB and Collection Connections
string databaseName = ConfigurationManager.AppSettings["databaseName"];
string collectionName = act.collection;
Database database = await client.CreateDatabaseIfNotExistsAsync(new Database { Id = databaseName });
DocumentCollection graph = await client.CreateDocumentCollectionIfNotExistsAsync(
UriFactory.CreateDatabaseUri(databaseName),
new DocumentCollection { Id = collectionName },
new RequestOptions { OfferThroughput = 1000 });
JArray lst = new JArray();
// Execute the Gremlin Query
try
{
IDocumentQuery <dynamic> query = client.CreateGremlinQuery <dynamic>(graph, GremlinQuery);
while (query.HasMoreResults)
{
foreach (dynamic result in await query.ExecuteNextAsync())
{
log.Info($"\t {JsonConvert.SerializeObject(result)}");
lst.Add(JObject.Parse(result.ToString()));
}
}
}catch (Exception err)
{
log.Info(err.Message);
lst.Add(err.Message);
}finally
{
this.JSONResults = lst.ToString(Newtonsoft.Json.Formatting.Indented);
}
}
public static HttpResponseMessage Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "{collection}/{entity}/{action}/{id}/{property}/{value}")] HttpRequestMessage req, string collection, string entity, string action, string id, string property, string value, TraceWriter log, ExecutionContext context)
{
log.Info("AddGraphEntity entring");
GraphAction grpAct;
try
{
grpAct = new GraphAction(collection, entity, action, id, property, value);
}
catch (Exception err)
{
return(req.CreateResponse(HttpStatusCode.BadRequest, err.Message));
}
string endpoint = ConfigurationManager.AppSettings["Endpoint"];
string authKey = ConfigurationManager.AppSettings["AuthKey"];
string retval = "";
using (DocumentClient client = new DocumentClient(
new Uri(endpoint),
authKey,
new ConnectionPolicy {
ConnectionMode = ConnectionMode.Direct, ConnectionProtocol = Protocol.Tcp
}))
{
try
{
Talk2Graph t2g = new Talk2Graph();
t2g.RunAsync(client, grpAct, log, context).Wait();
retval = t2g.JSONResults;
} catch (Exception err)
{
log.Info(err.Message);
return(req.CreateResponse(HttpStatusCode.OK, retval, "application/json"));
}
}
return(req.CreateResponse(HttpStatusCode.OK, retval, "application/json"));
}
