M2MCommunication.Services

M2M Communication - Services

The goal of this project is to provide an additional layer of abstraction, so that ASP.NET DI container doesn't force the hard dependencies on the OPC-UA library. Most of them are simply wrappers for interfaces from M2MCommunication.Core which they inject using UaooiServiceLocator. For the services to work it is neccessary to initialise them - ServiceContainerSetup class provides that functionality.

Services

Name	Description
MessageBusService	A wrapper for an injected IMessageBus implementation

MessageBusService

Implements IDisposable

A wrapper for an injected IMessageBus implementation

Constructors

Name	Description
MessageBusService()	Default constructor, tries to inject an instance of IMessageBus implementation into its property

Properties

Type	Name	Accessors	Description
IMessageBus	MessageBus	get;	Injected IMessageBus service

Methods

Return type	Name	Description
void	Dispose()	Disposes the MessageBus property

MEF helper classes

Name	Description
UaooiServiceLocator	An implementation of IServiceLocator which extends CommonServiceLocator.ServiceLocatorImplBase. Also implements IDisposable
ServiceContainerSetup	A class which should be used to initialise a DI container of the ServiceLocator

UaooiServiceLocator

Extends ServiceLocatorImplBase

Implements IDisposable

An implementation of a service locator design pattern.

Constructors

Name	Description
UaooiServiceLocator(CompoistionContainer compositionContainer)	Sets up the object. Throws ArgumentNullException if the compositionContainer is null

Methods

Return type	Name	Description
void	Dispose()	Disposes the composition container
IEnumerable<object>	DoGetAllInstances(Type serviceType)	Gets all instances of the serviceType (overriden from ServiceLocatorImplBase)
object	DoGetInstance(Type serviceType, string key)	Gets an instance of the serviceType with the given key (overriden from ServiceLocatorImplBase)

ServiceContainerSetup

Implements IDisposable

A class used to initialise a container for the UaooiServiceLocator to use. Requires UaLibrary section from application settings.

Constructors

Name	Description
ServiceContainerSetup(UaLibrarySettings settings)	Sets up the object with passed in configuration

Methods

Return type	Name	Description
void	Dispose()	Disposes private members
ServiceContainerSetup	Initialise()	Initialises a composition container and sets up a service locator for OPC-UA library