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GWT and WebServices (wsdl)
I have a project which contains Apache CXF web service and Spring 3.0 on the server side. I use gwt framework at client side and i want to call directly my web service from gwt. So i need a generator to generate gwt client side code from wsdl. Is there any solution or technic to generate gwt classes?
There is no built in or supported standard solution for calling SOAP services from client side GWT. You could look at this question but there don't seem to be any easy answers. The most standard and supported solution would be to develop a GWT server-side interface alongside your SOAP interface.
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Call another rest api from my server in Spring-Boot
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I'm building a Java application that needs to access an external Restful API.
I need to perform POST, GET and PUT on this API.
In PHP I used curl and in C# I used HTTPClient.
Which tool should I use in Java/Spring? I'm new in Java and I'm kind lost.
Use RestTemplate as Spring's way of sending HTTP methods
RestTemplate offers templates for common scenarios by HTTP method, in addition to the generalized exchange and execute methods that support of less frequent cases
Here are examples of using GET/ POST/ PUT methods
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I have developed a stand-alone java application (java 8 + javafx) using the MVC pattern. Now I should start to develop the web app and , according to the MVC pattern, only the View should change. My problem is: I don't know how to link the Angular frontend with the Java backend of the stand-alone app. How do these parts communicate? How do the frontend invoke the controller's methods?
Welcome to stackoverflow.
An Angular application is a Front-End web application. That means that it will execute in a web browser.
You cannot just plug-in an Angular app to a Java app.
What you need to do is:
on je Back-End side (Java 8 side): develop a REST server, i.e. a set of REST services that will recieve and process REST queries from the Front-End. Typically, people use Spring nowadays to wirte this kind of code (but there are other libs, frameworks...)
on the Front-End side (Angular): develop a REST client, i.e. a set of REST services that will emit queries and recieve the answers from the Back-End. Don't go looking too far: Angular comes with a full REST facility out of the box.
My recommandation at this point: Angular has a tutorial that will explain pretty well how to build client REST services. Start by doing this tutorial. If you need extra info, the documentation is pretty neet. And of course, for any complementary questions, SO is the place.
The most common way is to use REST.
Your backend needs to expose a REST API which will be used by the Angular to access/modify data.
If you're using Spring, you can use the #RestController to create your endpoints.
IIRC, you can use the HttpClient class in Angular to call rest APIs.
You'll find many examples on the web.
As I understood, you don't see how your Frontend application (Angular) lays down on MVC pattern.
It doesn't
You MVC pattern in the current case won't be fully implemented, as you will implement Model and Controllers but not View.
So you implement your controllers to return JSON results, not View, and you call those routes from your Frontend(Angular) application which is parallel to your Java application and should be started(hosted) separately or as static resources from your Java Backend.
Develop a frontend using Angular. Develop rest api with Java to communicate with the Angular frontend. Can use spring to develop rest api. Angular can process json or xml data. A rest api endpoint can output as json/xml and take input as json/xml data.
I want to create REST application with jersey and provide its api for other services. Which approach can be used? I found here answers older than 7 years ago.
Maybe does someone know better aproaches?
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There are tons of information about web services on the internet i know. But I couldn't find a simple and clear example or tutorial about how to use web services in practice for Java. I will be appreciated if someone guide me through what do i need to know to develop a webservice
using java and what re webservices usage in practice.
The reason I am asking this is because whenever I look for a job advertisement i come across these Restful, SOAP, JSON, XML web services.. So I wonder about the practical usage of this web services especially if u re not working in a company. For example i will be appreciated if u give an example of how to use web services especially for Android platform..
What web service is? A Web service is a method of communications between two electronic devices over the World Wide Web source.
In IT industry now a days web service developers are on demand,because web service are platform independent you can create a web-service using any technology and this can be consume by using any technologies. Basically web services are on demand when the organization start thinking about the product. For example If a industry wants to develop a product using java technology as a web application. letter on one of the client want to use the same application using front-end as PHP or Android or any other technology. Then organization again need to develop the same application using PHP or any other even though the organization has all the business done already. Here if the product was developed using web services then the organization just need to change the front-end technology his business are already done using web service so just need to consume the web services which will reduce the development time and cost of the product. I hope the above example will help you to understand needs of web services.
Restful and SOAP are the web services where JSON and XML are the message type of web services. you can find lots of differences between Rest and SOAP on the stackoverflow also.
A web service is an API that you give others to access data's that you have. Like how facebook
gives others websites the user friends list, and others sorts of information.
A ref to the WEB API.
restful-web-services-api-using-java-and-html Tutorial
When you expose some kind of functionality to others then you create a webservice. For example, you can create a webservice - it is just a trivial example - which receives 2 integers and returns the sum of them. Here is a small exmaple how you can implement WebService in JAVA.
WebService JAVA
A web service is a way to communicate with a server, basically since most of the apps collect some data on the user (that can also be for a login or something similar) you want to store the data in a place s.t. even if the user will switch a phone all the data of his "profile" will not be lost a practical and good place to start will be something like this
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Generating java files(stubs and skeletons) from wsdl(wsdl2java) is quite easy but I felt that generating wsdl from java(java2wsdl) is not as easy as wsdl2java.
I am starting with a webservice from scratch, I have written the java interface which contains all the web service API.
I want to generate wsdl from my java interface, I have come across about apache axis.
It is good but I want to know that what are the other tools available to generate wsdl from java interface, which are friendly to implement and what are advantages and disadvantages of them.
Suggestions and opinions are welcomed. Thanks in advance.
In addition to Apache Axis (v1.x and v2.x), I have used the IBM JAX-RPC implementation, some JAX-WS stuff and Spring-WS v2. My best experience thus far has been with the Spring framework. It advocates a contract-first development approach to web services; that is, create your XML Schema document first and then generate Java POJOs from that. Using Spring-WS you don't need to worry about creating a WSDL because (if you instruct it to) it will generate the WSDL based on your XML Schema document(s) and your configuration.
This allowed me to keep my web service interface packages nice and tidy: simple annotations hooked my Java classes into my Spring configuration, and the Spring-WS framework handled everything else. Spring-WS was the least invasive framework I've used for this, and also the easiest to get up and running with.
Using the Web Service plugin for eclipse IDE: Press 'Ctrl+N ', and go to Web Service/Web Service. For the service implementation written, wsdl will get generated in the same project directory.
This is an easy way of generating wsdl and vice versa(client stubs).
java2wsdl cmd available in apache cxf(For the cxf 2.1 versions, use java2ws instead) can do what exactly you want