/// <summary>
/// Loads the application configuration from an XML document
/// </summary>
/// <param name="document">The document</param>
/// <param name="settings">An optional settings file</param>
/// <param name="checkForMissingSettings">If set to true then any missing settings generate an exception</param>
/// <param name="applicationSecretStore">Optional secret store to use in addition to the settings</param>
/// <param name="verboseLogger">Optional verbose logger</param>
/// <returns>An application configuration</returns>
public static async Task<ApplicationConfiguration> FromXDocumentAsync(XDocument document, ApplicationConfigurationSettings settings,
bool checkForMissingSettings, IAsyncConfiguration applicationSecretStore = null, Action<string> verboseLogger = null)
{
if (document.Root == null) return null;
HashSet<string> secrets = new HashSet<string>();
verboseLogger?.Invoke("Processing settings");
ApplicationConfiguration configuration = new ApplicationConfiguration();
IApplicationResourceSettingNameProvider nameProvider = new ApplicationResourceSettingNameProvider();
IEnumerable<XElement> allDescendants = document.Descendants();
Regex settingPattern = new Regex(@"(?:\{\{)([^}]*)(?:\}\})");
foreach (XElement element in allDescendants)
{
if (!element.HasElements)
{
Match match = settingPattern.Match(element.Value);
string value = element.Value;
bool containsSecret = false;
while (match.Success)
{
string settingName = match.Groups[1].Value;
ApplicationConfigurationSetting setting;
if (!settings.Settings.TryGetValue(settingName, out setting) && checkForMissingSettings)
{
throw new MissingSettingException();
}
if (setting != null)
{
containsSecret |= setting.IsSecret;
value = value.Replace($"{{{{{settingName}}}}}", setting.Value);
}
match = match.NextMatch();
}
element.Value = value;
if (containsSecret)
{
secrets.Add(value);
}
}
}
document.Root.XPathSelectElements("infrastructure/sql-server").ToList().ForEach(element =>
{
var xfqn = element.Element("fqn");
if (xfqn != null)
{
var xconnectionstring = element.Element("connection-string");
if (xconnectionstring != null)
configuration.SqlServerConnectionStrings.Add(xfqn.Value, xconnectionstring.Value);
}
});
document.Root.XPathSelectElements("infrastructure/storage-account").ToList().ForEach(element =>
{
ApplicationStorageAccount storageAccount = new ApplicationStorageAccount(element);
configuration.StorageAccounts.Add(storageAccount.Fqn, storageAccount);
});
document.Root.XPathSelectElements("infrastructure/service-bus").ToList().ForEach(element =>
{
var xfqn = element.Element("fqn");
if (xfqn != null)
{
var xconnectionstring = element.Element("connection-string");
if (xconnectionstring != null)
configuration.ServiceBusConnectionStrings.Add(xfqn.Value, xconnectionstring.Value);
}
});
foreach (XElement element in document.Root.Elements("component").ToList())
{
ApplicationComponent component = new ApplicationComponent
{
Fqn = element.Attribute("fqn").Value
};
IComponentIdentity componentIdentity = new ComponentIdentity(component.Fqn);
verboseLogger?.Invoke($"Parsing component {componentIdentity}");
XElement sqlServerElement = element.Element("sql-server");
XElement storageElement = element.Element("storage-account");
XElement serviceBusElement = element.Element("service-bus");
XElement dbContextTypeElement = element.Element("db-context-type");
XElement defaultBlobContainerNameElement = element.Element("default-blob-container-name");
XElement defaultQueueNameElement = element.Element("default-queue-name");
XElement defaultTableNameElement = element.Element("default-table-name");
XElement defaultTableData = element.Element("table-data");
XElement defaultLeaseBlockNameElement = element.Element("default-lease-block-name");
XElement defaultSubscriptionNameElement = element.Element("default-subscription-name");
XElement defaultTopicNameElement = element.Element("default-topic-name");
XElement defaultBrokeredMessageQueueNameElement = element.Element("default-brokered-message-queue-name");
XElement settingsElement = element.Element("settings");
XAttribute defaultBlobContainerAccessAttribute = defaultBlobContainerNameElement?.Attribute("public-permission");
if (sqlServerElement != null)
{
try
{
string secret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.SqlConnectionString(componentIdentity)) : null;
component.SqlServerConnectionString = secret ?? configuration.SqlServerConnectionStrings[sqlServerElement.Value];
}
catch (KeyNotFoundException)
{
throw new InvalidDataException($"Sql server with fqn of {sqlServerElement.Value} is missing from configuration file.");
}
}
if (storageElement != null)
{
try
{
string secret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.StorageAccountConnectionString(componentIdentity)) : null;
component.StorageAccountConnectionString = secret ?? configuration.StorageAccounts[storageElement.Value].ConnectionString;
}
catch (Exception)
{
throw new InvalidDataException($"Storage account with fqn of {storageElement.Value} is missing from configuration file.");
}
}
if (serviceBusElement != null)
{
try
{
verboseLogger?.Invoke($"Looking for service bus connection string for component {componentIdentity}");
string secret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.ServiceBusConnectionString(componentIdentity)) : null;
if (secret != null)
{
verboseLogger?.Invoke($"Using secret store service bus connection string for component {componentIdentity}");
}
component.ServiceBusConnectionString = secret ?? configuration.ServiceBusConnectionStrings[serviceBusElement.Value];
}
catch (Exception)
{
throw new InvalidDataException($"Service bus account with fqn of {serviceBusElement.Value} is missing from configuration file.");
}
}
string name = nameProvider.SqlContextType(componentIdentity);
verboseLogger?.Invoke(name);
string dbContextTypeSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(name) : null;
if (!string.IsNullOrWhiteSpace(dbContextTypeSecret)) verboseLogger?.Invoke($"Using secret store for dbContextType for component {componentIdentity}");
component.DbContextType = dbContextTypeSecret ?? dbContextTypeElement?.Value;
string defaultBlobContainerNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultBlobContainerName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultBlobContainerNameSecret)) verboseLogger?.Invoke($"Using secret store for default blob container name for component {componentIdentity}");
component.DefaultBlobContainerName = defaultBlobContainerNameSecret ?? defaultBlobContainerNameElement?.Value;
string defaultQueueNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultQueueName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultQueueNameSecret)) verboseLogger?.Invoke($"Using secret store for default queue name for component {componentIdentity}");
component.DefaultQueueName = defaultQueueNameSecret ?? defaultQueueNameElement?.Value;
string defaultTableNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultTableName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultTableNameSecret)) verboseLogger?.Invoke($"Using secret store for default table name for component {componentIdentity}");
component.DefaultTableName = defaultTableNameSecret ?? defaultTableNameElement?.Value;
component.DefaultBlobContainerAccessType = BlobContainerPublicAccessTypeEnum.Off;
string defaultLeaseBlockNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultLeaseBlockName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultLeaseBlockNameSecret)) verboseLogger?.Invoke($"Using secret store for default lease block name for component {componentIdentity}");
component.DefaultLeaseBlockName = defaultLeaseBlockNameSecret ?? defaultLeaseBlockNameElement?.Value;
string defaultTopicNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultTopicName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultTopicNameSecret)) verboseLogger?.Invoke($"Using secret store for default topic name for component {componentIdentity}");
component.DefaultTopicName = defaultTopicNameSecret ?? defaultTopicNameElement?.Value;
string defaultSubscriptionNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultSubscriptionName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultSubscriptionNameSecret)) verboseLogger?.Invoke($"Using secret store for default subscription name for component {componentIdentity}");
component.DefaultSubscriptionName = defaultSubscriptionNameSecret ?? defaultSubscriptionNameElement?.Value;
string defaultBrokeredMessageQueueNameSecret = applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.DefaultBrokeredMessageQueueName(componentIdentity)) : null;
if (!string.IsNullOrWhiteSpace(defaultBrokeredMessageQueueNameSecret)) verboseLogger?.Invoke($"Using secret store for default brokered message queue name for component {componentIdentity}");
component.DefaultBrokeredMessageQueueName = defaultBrokeredMessageQueueNameSecret ?? defaultBrokeredMessageQueueNameElement?.Value;
component.TableData = defaultTableData?.Value;
component.Uploads = element.Elements("upload").Select(x => x.Value).ToList();
if (defaultBlobContainerAccessAttribute != null)
{
string accessAttribtueValue = defaultBlobContainerAccessAttribute.Value.ToLower();
if (accessAttribtueValue == "blob")
{
component.DefaultBlobContainerAccessType = BlobContainerPublicAccessTypeEnum.Blob;
}
else if (accessAttribtueValue == "container")
{
component.DefaultBlobContainerAccessType = BlobContainerPublicAccessTypeEnum.Container;
}
}
verboseLogger?.Invoke($"Processing settings for {componentIdentity}");
if (settingsElement != null)
{
foreach (XElement componentSettingsElement in settingsElement.Elements().ToList())
{
string resourceType = null;
XAttribute resourceTypeAttr = componentSettingsElement.Attribute("resource-type");
if (resourceTypeAttr != null)
{
resourceType = resourceTypeAttr.Value;
}
Dictionary<string, string> attributeDictionary = componentSettingsElement.Attributes().ToDictionary(attribute => attribute.Name.LocalName, attribute => attribute.Value);
component.Settings.Add(new ApplicationComponentSetting
{
Key = componentSettingsElement.Name.LocalName,
ResourceType = resourceType,
Value = (applicationSecretStore != null ? await applicationSecretStore.GetAsync(nameProvider.SettingName(componentIdentity, componentSettingsElement.Name.LocalName)) : null) ?? componentSettingsElement.Value,
Attributes = attributeDictionary
});
}
}
configuration.ApplicationComponents.Add(component);
verboseLogger?.Invoke($"Finished parsing component {componentIdentity}");
}
configuration.Secrets = secrets.ToList();
return configuration;
}
public static ApplicationConfiguration FromFile(string filename, ApplicationConfigurationSettings settings)
{
ApplicationConfiguration configuration = new ApplicationConfiguration();
XDocument document;
using (StreamReader reader = new StreamReader(filename))
{
if (settings != null)
{
string processedXml = settings.Merge(reader);
document = XDocument.Parse(processedXml);
}
else
{
document = XDocument.Load(reader);
}
}
document.Root.XPathSelectElements("infrastructure/sql-server").ToList().ForEach(element =>
{
configuration.SqlServerConnectionStrings.Add(element.Element("fqn").Value, element.Element("connection-string").Value);
});
document.Root.XPathSelectElements("infrastructure/storage-account").ToList().ForEach(element =>
{
ApplicationStorageAccount storageAccount = new ApplicationStorageAccount(element);
configuration.StorageAccounts.Add(storageAccount.Fqn, storageAccount);
});
document.Root.XPathSelectElements("infrastructure/service-bus").ToList().ForEach(element =>
{
configuration.ServiceBusConnectionStrings.Add(element.Element("fqn").Value, element.Element("connection-string").Value);
});
document.Root.Elements("component").ToList().ForEach(element =>
{
ApplicationComponent component = new ApplicationComponent
{
Fqn = element.Attribute("fqn").Value
};
XElement sqlServerElement = element.Element("sql-server");
XElement storageElement = element.Element("storage-account");
XElement serviceBusElement = element.Element("service-bus");
XElement dbContextTypeElement = element.Element("db-context-type");
XElement defaultBlobContainerNameElement = element.Element("default-blob-container-name");
XElement defaultQueueNameElement = element.Element("default-queue-name");
XElement defaultTableNameElement = element.Element("default-table-name");
XElement defaultTableData = element.Element("table-data");
XElement defaultLeaseBlockNameElement = element.Element("default-lease-block-name");
XElement defaultSubscriptionNameElement = element.Element("default-subscription-name");
XElement defaultTopicNameElement = element.Element("default-topic-name");
XElement defaultBrokeredMessageQueueNameElement = element.Element("default-brokered-message-queue-name");
XElement settingsElement = element.Element("settings");
XAttribute defaultBlobContainerAccessAttribute = defaultBlobContainerNameElement?.Attribute("public-permission");
if (sqlServerElement != null)
{
try
{
component.SqlServerConnectionString = configuration.SqlServerConnectionStrings[sqlServerElement.Value]; component.SqlServerConnectionString = configuration.SqlServerConnectionStrings[sqlServerElement.Value];
}
catch (KeyNotFoundException)
{
throw new InvalidDataException($"Sql server with fqn of {sqlServerElement.Value} is missing from configuration file.");
}
}
if (storageElement != null)
{
try
{
component.StorageAccountConnectionString = configuration.StorageAccounts[storageElement.Value].ConnectionString;
}
catch (Exception)
{
throw new InvalidDataException($"Storage account with fqn of {storageElement.Value} is missing from configuration file.");
}
}
if (serviceBusElement != null)
{
try
{
component.ServiceBusConnectionString = configuration.ServiceBusConnectionStrings[serviceBusElement.Value];
}
catch (Exception)
{
throw new InvalidDataException($"Service bus account with fqn of {serviceBusElement.Value} is missing from configuration file.");
}
}
component.DbContextType = dbContextTypeElement?.Value;
component.DefaultBlobContainerName = defaultBlobContainerNameElement?.Value;
component.DefaultQueueName = defaultQueueNameElement?.Value;
component.DefaultTableName = defaultTableNameElement?.Value;
component.DefaultBlobContainerAccessType = BlobContainerPublicAccessTypeEnum.Off;
component.DefaultLeaseBlockName = defaultLeaseBlockNameElement?.Value;
component.DefaultTopicName = defaultTopicNameElement?.Value;
component.DefaultSubscriptionName = defaultSubscriptionNameElement?.Value;
component.DefaultBrokeredMessageQueueName = defaultBrokeredMessageQueueNameElement?.Value;
component.TableData = defaultTableData?.Value;
component.Uploads = element.Elements("upload").Select(x => x.Value).ToList();
if (defaultBlobContainerAccessAttribute != null)
{
string accessAttribtueValue = defaultBlobContainerAccessAttribute.Value.ToLower();
if (accessAttribtueValue == "blob")
{
component.DefaultBlobContainerAccessType = BlobContainerPublicAccessTypeEnum.Blob;
}
else if (accessAttribtueValue == "container")
{
component.DefaultBlobContainerAccessType = BlobContainerPublicAccessTypeEnum.Container;
}
}
settingsElement?.Elements().ToList().ForEach(x =>
{
string resourceType = null;
XAttribute resourceTypeAttr = x.Attribute("resource-type");
if (resourceTypeAttr != null)
{
resourceType = resourceTypeAttr.Value;
}
Dictionary<string, string> attributeDictionary = x.Attributes().ToDictionary(attribute => attribute.Name.LocalName, attribute => attribute.Value);
component.Settings.Add(new ApplicationComponentSetting
{
Key = x.Name.LocalName,
ResourceType = resourceType,
Value = x.Value,
Attributes = attributeDictionary
});
});
configuration.ApplicationComponents.Add(component);
});
return configuration;
}