Why do we have SOAP connect option while creating a connector when we already have a Web Service Consumer connector? We can configure a wsdl with Web Service Consumer and access a web service. What is the difference between the two options?
"Why do we have SOAP connect option" because MuleSoft want to provide a method for ISV to provide connectors to new and existing endpoints without Mulesoft themselves having to create them. Mulesoft Anypoint Platform success is built on the premise of connecting to anything and therefore SOAP Connect helps this.
Secondly connecting to a using WSDL location for consuming a soap web service involves a developer to know the service pretty well and therefore allowing error and interpretation errors but if you internally create a connector you can reduce implementation time and errors.
Thirdly on WSDL there are often many methods not applicable or and an enterprise does not want to consume and therefore a connector can filter these methods.
Connectors = Re-Use
Web Service Consumer connector = manual process
The Web Service Consumer is an existing connector that you can configure to point to a WSDL location for consuming a soap web service. SOAP Connect is a DevKit wizard that creates an Anypoint Connector that connects to a specific service, which can expose multiple WSDLs of the service.
With Web Service Consumer we have to call each API separately in separate flows. With SOAP Connect, you can package multiple WSDL files and API versions into a single connector, making the process of creating, maintaining and using a connector for SOAP APIs much faster and easier.
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I have a query on a design hope you guys can clarify my doubt.
I have a specific requirement in which Mule is used just to expose the back end services in API gateway, backend services are written in Spring boot and other technology, all these services needs to be exposed in API gateway.
Is this a good practice to do that and if yes how can we do that?
I saw that in API manager we can create proxy layer on top of the services developed in Mule but is it possible to create proxies for the services developed in different technologies?
Absolutely ... For creating proxy service, it doesn't matter what type of technology does the backend service have.
It can create a proxy layer for any kind of backend service available either locally, in cloud or other remote location till the service url is accessible.
This proxy will create an additional layer hiding the actual url to the external world.
it doesn't matter what technology you are using for development as long as those are REST services and accessible to the cloudhub application. You can deploy those on-premise and can integrate your local runtime with cloudhub. Also, mule supports spring projects and you can directly configure your spring project/details inside mule.
What is the difference between a Proxy service and API service in wso2esb?
To expose my service I can give proxy URL and API URL then in which scenario both differs? and in which scenario I can use proxy and in which I can use API?
Please help me in understanding..,
An API has resources so it is suitable when you have to perform multiple operations like CRUD etc. then you can call particular resource which will be performing some particular operation.
A proxy service is suitable when you have to perform an isolated operation (single operation).
So, what you can do is, make an API for multiple operations and then create proxy services for each operation.
Moreover, API can be called as REST service and Proxy service is called as a soap service.
Use a proxy service to expose a SOAP web service
You can consume JMS messages or files with VFS, but since ESB 4.9.0 you can use inbound endpoints for that purpose
Use API to expose a REST service
Based on WSO2 Architecture blog posts
http://wso2.com/blogs/architecture/2013/05/a-pragmatic-approach-to-the-api-faade-pattern/
http://wso2.com/blogs/architecture/2013/05/implementing-an-api-faade-with-the-wso2-api-management-platform/
I tried to publish API, but exposed WSDL is direct link to back-end ESB.
I planned to expose to outer Internet just API Manager so all calls will be proxied through it. Access to ESB should be limited to internal services and not to public.
Did I something wrong in configuration or API Manager doesn't support this function?
I use WSO2 API Manager 1.4.0 and WSO2 ESB 4.7.0.
DO NOT expose the WSDL of ESB proxy service. The use case for exposing wsdl to allow users to get to know the service contract. You can host the wsdl in a separate location and provide that in the APIManager.
But i think, when we host a WSDL from APIManager, it's port bindings need to be changed according to the gateway node.SO,the requests will be routed via gateway..But that feature is not available in the released versions..We will consider that in the future release.
I have created a WCF service and hosted it through self hosting. This service doesn't have any metada published.
First Question
Can I consume it through Visual Studio, Add Service Reference? Hopefully not.
Can I consume it by creating manual proxy, i.e. ChannelFactory<ServiceContract>....?Hopefully yes.
Now in the second scenario, the client must be .Net, right?
So it implies that, to consume a wcf service on a non-.net platform, we have to expose its metadata?
Can't a WCF service without metadata, consume by Ajax client, or say Java client??
There are 3 options to consume a WCF Service:
If the service exposes a WSDL use "add service reference" from VS (or an equivalent from another platform). Note that if you do not want to expose the WSDL you could expose it just temporarly, save the WSDL in a file, and then send it to user in any platform to generate proxy from it. You can turn off the WSDL immediately after you save it. Also note that even if the WSDL is not exposed still you need to protect the web service from unauthorized access.
If this is a .Net client it can compile with the same Service Contract assembly and use ChannelFactory etc.
Any platform can send raw soap message (e.g. XML) to the service. Of course they need to know what is the right format. A WSDL can help but even without it if they have a working sample they can imitate it.
WCF provides REST (Representational State Transfer) support to consume it by non .NET client like JavaScript (AJAX), java, Objective C, web browser, etc...
Basically WCF REST is exposes methods and transferring data over the HTTP protocol and it supports all HTTP operations (GET, POST, PUT, and DELETE). This feature is making it platform independent as well as it doesn’t require metadata exposed.
Please refere below links to get more about WCF REST:
An Introduction To RESTful Services With WCF
WCF REST Programming Model Overview
WCF Rest vs. WCF SOAP
Create RESTful WCF Service API: Step By Step Guide
We are investigating using NServiceBus for our ESB implementation. We have several external partners that do not use Microsoft technologies. Is there a way of routing using NServiceBus to a SOAP or REST service and then accepting the message as processed based on the response from the service.
Yes, you can have a service expose a WCF endpoint to accept a Command, process it, and return an error/return code which is then delivered in the web service response.
Check out the article How Do I Expose An NServiceBus Endpoint As A Web/Wcf Service? on the NServiceBus support site, but be aware that as of NServiceBus 4.0 (currently in beta) the Webservice option the article mentions is being removed, as Microsoft has officialy declared ASMX web services to be a "legacy technology".
That aside, a WcfService should work quite well for this scenario.