public static bool TryParse(string connectionString, out CosmosDBConnectionString parsedConnectionString)
{
if (String.IsNullOrWhiteSpace(connectionString))
{
parsedConnectionString = null;
return(false);
}
try
{
return(ParseImpl(connectionString, out parsedConnectionString, err => { }));
}
catch (Exception)
{
parsedConnectionString = null;
return(false);
}
}
private static bool ParseImpl(string connectionString, out CosmosDBConnectionString parsedConnectionString, Action <string> error)
{
IDictionary <string, string> settings = ParseStringIntoSettings(connectionString, error);
if (settings == null)
{
parsedConnectionString = null;
return(false);
}
if (!RequireSettings.IsSubsetOf(settings.Keys))
{
parsedConnectionString = null;
return(false);
}
parsedConnectionString = new CosmosDBConnectionString(
new Uri(settings[AccountEndpointKey]), settings[AccountKeyKey]);
return(true);
}
private static void EnsureClient(ExecutionContext context)
{
if (cosmosDbClient != null)
{
return;
}
lock (staticLock)
{
if (cosmosDbClient != null)
{
return;
}
IConfigurationRoot config = new ConfigurationBuilder()
.SetBasePath(context.FunctionAppDirectory)
.AddJsonFile("local.settings.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables()
.Build();
string connectionStringValue = config.GetConnectionString(ConnectionStringName);
if (String.IsNullOrWhiteSpace(connectionStringValue))
{
throw new InvalidOperationException(
Invariant($"Connection string '{ConnectionStringName}' has not been defined."));
}
var connectionString = CosmosDBConnectionString.Parse(connectionStringValue);
cosmosDbClient = new DocumentClient(
connectionString.Endpoint,
connectionString.AuthKey,
CosmosDBConnectionString.DefaultPolicy);
}
}