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The next expiry that the future needs to do is to flare the IProductBrowser interface in response to inherit its investors. Marxist Templates While I describe the premium of knowing project and strong templates as a classic, and I show you how to process everything else, you can sometimes create your own data to build for what I definition Visual Fuck is made.
This can also be done through the IDE. This will also replace the. If you made config changes in your client config, be aware that you may end up wev double entries with names such as MyWCFServiceBasicHttp1 to use the example above. You should clean those up, or you will end up with a holy mess after a while. If your service moved, referwnce you want to test, say, the staging or production service, the procedure differs between VS and Open the. It looks something like this: Edit the ServiceReferenceUri only, and save the. You will see the Aervice Address change automatically as the refernce is contacted, a new proxy is generated and the.
You will see the Service Reference Settings dialog see above. Change the Address value, click OK, and everything that needs to happen happens. Remember again, to copy the config section into your executing assembly if you are operating in a class library. Using svcutil. In VS, this may be your best option if you want to establish service references in a web site project. Note that the tool resides in different locations for the different VS versions: For more information see http: Configurations will be written into an output. If you had other config sections, you have just lost them. Notice that the namespace of the generated proxy class is based on the service's namespace if you don't specify it explicitly through the commandline.
Hosts will have the service configuration information in either a web. This is the largest culprit for anti-reusability and configuration bloat. This proxy class is not difficult to write and, in fact, attacking this manually gives you a couple of different choices. NET of course. Should I have a case where I have a Java client or some other type of. NET service consumer would not only need a proxy class but also service contracts that represent the messages that are being used. If you recall, I had decided to branch off my service and data contracts into their own assembly, and now I can reuse this assembly by simply referencing it from my service consumer.
The service consumer which will contain the service proxies will also become its own assembly. Deference gives sedvice the ability to use these proxies from more updatig one client application. Remember that a client application does not necessarily have to be a UI application, but can be an unmanned process as well. Having my service client proxies in their own assembly can be analogous to branching out the business layer of a conventional object-oriented architecture in order to make it accessible by a number of client tiers. The last set of assemblies I will have are simply the clients of my service proxies, which would of course be my UI applications or unmanned processes that want to use what my services have to offer.
The ideas illustrate a more likely system id with both a Daily historical and an Lose service. In severity you can take a census object numerous the one stored in the important topic above and use it in many binding.
Convig diagrams illustrate a more complete system fonfig with both a Product service and an Order service. For the purposes of this article, Nnot will concentrate only on updaying Product part of the system in order to not take over this issue of CoDe Magazine in its entirety. I also want to say, before someone freaks over my code, that in the interest of time and space I will not put any error handling or Fault Contract code in any of my examples. I updatung this as a given when developing any real application. Figure 2: Application architecture.
Figure 3: Assembly separation. This contract will contain data having to do with product information. Serialization assembly that I must reference. You can see this class in Listing 2. In this example, I did not see the need to separate any of this out into more assemblies. IProductBrowser will contain operations that allow the browsing of a product catalog by defining operations that will signify the retrieval of a single product as well as an entire product listing. It will also contain operations for searching for products given some incoming information. IProductAdmin will contain operations for adding and maintaining the product catalog.
The separate contracts will allow me to control access on these two sets of operations separately. Listing 3 shows the full listings for these two service contracts. ServiceModel namespace, which is part of another assembly I need to reference: Also notice that the ServiceContract attribute defines the name and unique namespace for my service contracts.
My next project will contain the implementation details and will remain behind the services layer. Afd the benefit of reusing my contracts from my client proxies later, separating them from this "services" project also allow me Add service reference not updating web config create multiple implementations of each contract if I so desire. My next project will be called Service and will reference not only System. ServiceModel but my Contracts assembly rrference well. This project will contain one service class called ProductService.
The implementation in this service will be the meat wbe my service and can call out to anything it needs to perform its functionality. Listing 4 shows the code for the ProductService class. Hosting So let me recap where I am so far. I have my contracts wdb data and service in one assembly, which is referenced by my other project containing my service. Remember earlier I said that endpoints are created on a per-contract basis. You also saw that I split off my public and admin functions into two separate service contracts.
Given this information, you can conclude that each service contract will need to be exposed using its own endpoint and can thus be exposed using its own host. The IProductAdmin contract will be exposed using a TCP host running in a console application since it will sit inside a firewall. This service will benefit from the speed of TCP and will only be consumed by. NET clients. I could have certainly chosen to host both service contracts using my IIS solution, but I would be limited to HTTP transport on a service that would not be public and can sit inside a firewall.
You can probably already see the benefits of decoupling the hosts from the rest of the components. NET application. Both projects will need to reference the System. ServiceModel assembly, as well as my Service and Contracts assemblies. I used a standard ASP. NET application and simply deleted the Default. That will over-bloat my web. Instead I added a text file item to my application and renamed it ProductService. Unlike the "everything automatic" walkthrough I gave you at the beginning of this article, this SVC file will not have a code-behind file containing the service implementation.
Remember, I already have that in my Service project which I referenced here. The reason for that is simple. You end up copying the system. Although you might accept the duty to do it every time your class library config file gets updated adding service reference, changing address, changing security etc.
Although this is a very famous issue, there are not many solutions for that except to copy. Possible solution to servicee problem you can find herehowever the code that generates the client is very complicated. A better solution can be found herebut it assumes that you know the endpoint name and it is hard-coded. My solution is based on the latter, but is dynamic.