public Task <ITriggerBinding> TryCreateAsync(TriggerBindingProviderContext context)
{
// Tries to parse the context parameters and see if it belongs to this [CosmosDBTrigger] binder
if (context == null)
{
throw new ArgumentNullException("context");
}
ParameterInfo parameter = context.Parameter;
CosmosDBCassandraTriggerAttribute attribute = parameter.GetCustomAttribute <CosmosDBCassandraTriggerAttribute>(inherit: false);
if (attribute == null)
{
return(null);
}
string contactPoint = ResolveConfigurationValue(attribute.ContactPoint, nameof(attribute.ContactPoint));
string user = ResolveConfigurationValue(attribute.User, nameof(attribute.User));
string password = ResolveConfigurationValue(attribute.Password, nameof(attribute.Password));
ICosmosDBCassandraService cosmosDBCassandraService = _configProvider.GetService(contactPoint, user, password);
return(Task.FromResult((ITriggerBinding) new CosmosDBCassandraTriggerBinding(
parameter,
ResolveAttributeValue(attribute.KeyspaceName),
ResolveAttributeValue(attribute.TableName),
attribute.StartFromBeginning,
attribute.FeedPollDelay,
cosmosDBCassandraService,
_logger)));
}
public CosmosDBCassandraTriggerBinding(ParameterInfo parameter,
string keyspace,
string table,
bool startFromBeginning,
int feedpolldelay,
ICosmosDBCassandraService cosmosDBCassandraService,
ILogger logger)
{
_keyspace = keyspace;
_table = table;
_cosmosDBCassandraService = cosmosDBCassandraService;
_parameter = parameter;
_startFromBeginning = startFromBeginning;
_feedpolldelay = feedpolldelay;
_logger = logger;
}
public CosmosDBTriggerListener(ITriggeredFunctionExecutor executor,
string functionId,
string keyspace,
string table,
bool startFromBeginning,
int feedpolldelay,
ICosmosDBCassandraService cosmosDBCassandraService,
ILogger logger)
{
this._logger = logger;
this._executor = executor;
this._functionId = functionId;
this._keyspace = keyspace;
this._table = table;
this._startFromBeginning = startFromBeginning;
this._defaultTimeSpan = feedpolldelay > 0 ? TimeSpan.FromMilliseconds(feedpolldelay) : TimeSpan.FromMilliseconds(5000);
this._cosmosDBCassandraService = cosmosDBCassandraService;
this._hostName = Guid.NewGuid().ToString();
}
