I new to SOAP web service. In my project there is a requirement where I need to consume the SOAP web service in spring MVC. I tried search in google I am not getting simple example to integrate the SOAP services with spring MVC.
I have few other question as well.
What is JAXB? As per my understanding the JAXB is used for marshalling and unmarshalling the objects from service.
2.Whether I can use both restful web service and SOAP web service together in same spring mvc application?
3.What is different between Spring-WS and JAX-WS?
What is JAXB? As per my understanding the JAXB is used for marshalling
and unmarshalling the objects ?
Yes, JAXB is a framework which can be used to convert Java object into an XML file (stream) and vice versa.
Java Object to an XML file conversion is called marshalling and the opposite is unmarshalling.
This technique will be useful when two applications are exchanging the business data using XML.
2.Whether I can use both restful web service and SOAP web service together in same spring mvc application ?
Yes, you can use both together with in the same project as per your business requirements.
For example, assume that your application (project) might need some data from two external sources i.e., external system1 (assume that it exposes it's endpoints in SOAP) and
external system2 (assume that it exposes it's endpoints in REST), your application has to interact with both of those to exchange the data.
Similarly your application might need to expose few services in REST and few services in SOAP (assume that the other system can consume only SOAP), it is all about agreeing between different systems on data exchanging formats.
3.What is the difference between Spring-WS and JAX-WS ?
JAX-WS is a specification & implementation built into JDK for consuming/producing SOAP services.
Spring-WS is a Spring API for consuming/producing SOAP services.
There are two types of SOAP frameworks available for the development of projects:
Compliant to JAX-WS - like Apache CXF, Apache Axis2, etc..
Non compliant to JAX-WS - Spring-WS
You can look at here for the list of web service frameworks
Related
I have recently encountered a problem statement ,there is a legacy code using soap based web service and ant as build tool.
My task is to convert the soap based web service to rest endpoint using spring boot and then end goal is to convert to microservice.
I have seen lot of articles where spring starter project is created with spring webservice dependency and they are also generating the classes through xsd's and using annotations like payload and SOAP configuration and checking the wsdl after running the application.
Is this the right approach to convert soap to rest but in my understanding it is simply creating soap web services using spring boot.
If we expose Rest Controllers with Pojos generated and generating the response type as xml or json ,do we need to do something apart from this to achieve the goal of converting soap to rest?
Any suggestions?
I am still exploring the working solution.
So far I have created the config client and server and I am thinking how to code inside the client code to expose soap as rest service.
I have a system (kind of aggregator) that integrates with hundreds of different SOAP services - most of them do the same business functionality, but each service having different data structure in SOAP request & very few having 2 API calls to complete one transaction.
The present service integration workflow is
create stubs from WSDL
map data to the generated stub api
setup a new endpoint to fire this api
I see this a repeated, unintelligent work & requires development effort for every new service integration.
Was there different approaches to integrate with lot many systems? Any libraries that can generate soap requests based on configurations, or I have to rely on some Java SOAP, Spring lirbaries to create custom SOAP xml request from my own configurations? I see Spring's WebServiceGatewaySupport for webservice client but requires stubs created from wsdl?
Is it wise to define soap request xml as templates for every service, generate xml with input data?
Other ways I thought was to develop each integrations as independent microservice layered under an API gateway that routes each requests to specific service. But this design approach will have hundreds of services running, consuming more resources (in case of Spring boot).
Generate stubs & deposit the jar to disk, load this jar with a classloader & use the stubs using reflection - not so simple, I believe.
Use of serverless looks promising but is not possible immediately.
I'm reading tutorial for Apache CXF and I see one of the samples is using Spring framework. Looking at the following example I don't understand how it is different from just using Spring (it seems CXF doesn't add any add'l functionality?) http://cxf.apache.org/docs/writing-a-service-with-spring.html
Apache CXF is a Services Framework which can be used to create web services and support JAX-RS/JAX-WS/SAAJ etc (various specifications for developing Web Services).
From there documentation they support the following:
Multiple Transports, Protocol Bindings, Data Bindings, and Formats
Transports: HTTP, Servlet, JMS, In-VM and many others via the Camel transport for CXF such as SMTP/POP3, TCP and Jabber
Protocol Bindings:SOAP, REST/HTTP, pure XML Data bindings: JAXB 2.x, Aegis, Apache XMLBeans, Service Data Objects (SDO), JiBX
Formats: XML Textual, JSON,FastInfoset
Extensibility API allows additional bindings for CXF, enabling additional message format support such as CORBA/IIOP
Where as Spring is an Application Framework and supports
IOC Container / DI Framework
MVC Framework (Web Applications and Web Services support)
Data/JPA wrappers etc
To make your enterprise application creation experience smooth.
What are the advantages of using Spring Rest Web Services over Core Servlet ?
As we know Spring Rest Web Services also use Servlet internally.
REST is a special kind of web service. Whether this is the right thing for your application varies. If it is you should use a framework/library that is designed for REST to make coding simpler. You might also want to have a look at JAX-RS.
If you need a non-REST web service Servlet may be an option, but there are other options, too.
REST is not a type of Web Service - it is an Architecture and specification - JAX-RS. Spring has its own REST implementation libraries primarily based on its MVC controller. I would recommend you not to go for Spring Rest Web Services until you have any Spring specific requirement (Though I cant think of any such requirement which cant be solved by other light wait JAX-RS implementations). Jersey is the most light weight JAX-RS reference implementation by Sun/Oracle which, has support for Spring as well which, can be plugged in on requirement basis.
I am trying to work on a PoC to replace an IBM WESB Proxy mediation (Exposed as a web service, Receives the soap request, Invokes different other Web Services based on the Soap Header passed in the request).
These web services are built using JAX-RPC and Spring framework running in WAS 7 container.
Is it possible to use Camel for this usecase? I don't want to migrate the underlying web services to CXF or SpringWS yet.
Does Camel have any URI's to solve this purpose? (like a web service adapter to call other non-CXF/non-SpringWS web services)
Any help is very much appreciated. Thanks.
First thing - If it is a RPC /ENCODED web service then you CANNOT call it even with cxf.There are ways that you can modify the rpc wsdl to use doc/literal but I would not suggest using that approach.
The simplest way to do this if you do not want to use cxf component or spring-ws is to create a java bean to invoke the Axis web service using the generated stubs.