OpcXmlDaClient

Operations

type Op i o = Manager -> RequestTimeout -> Uri -> i -> IO (Either Error o)

Alias to an HTTP request operation in the scope of HTTP connection manager, timeout for the operation, URI of the server.

All errors are explicit and are wrapped by the Error type.

getStatus :: Op GetStatus GetStatusResponse

read :: Op Read ReadResponse

write :: Op Write WriteResponse

subscribe :: Op Subscribe SubscribeResponse

subscriptionPolledRefresh :: Op SubscriptionPolledRefresh SubscriptionPolledRefreshResponse

subscriptionCancel :: Op SubscriptionCancel SubscriptionCancelResponse

browse :: Op Browse BrowseResponse

getProperties :: Op GetProperties GetPropertiesResponse

Operation parameter types

data Uri

URI of the server.

textUri :: Text -> Maybe Uri

Construct a correct URI by validating a textual value.

data RequestTimeout

Instances

Default RequestTimeout

RequestTimeout of 30 seconds.

Defined in OpcXmlDaClient

Methods

def :: RequestTimeout

millisecondsRequestTimeout :: Int -> Maybe RequestTimeout

Construct a request timeout value, ensuring that it's in the proper range.

Operation errors

data Error

Error during the execution of an operation.

Constructors

HttpError HttpExceptionContent

IoError IOException

ParsingError Text

SoapError SoapFault

Instances

Eq Error

Defined in OpcXmlDaClient

Methods

(==) :: Error -> Error -> Bool

(/=) :: Error -> Error -> Bool

Show Error

Defined in OpcXmlDaClient

Methods

showsPrec :: Int -> Error -> ShowS

show :: Error -> String

showList :: [Error] -> ShowS

Value types

module OpcXmlDaClient.Protocol.Types