I'm new to Google App Engine.
I know the Cloud concept and I know a bit about the API and Storage of GAE.
Problem:
One Desktop application (Java, Swing) needs some services. These services should be given to the app via HTTP/HTTPS.
For example the app sends some parameters and receive a result (String(s)).
Is GAE good for providing the services to the App?
If so, What is the best point to start?
Thanks in advance
Maybe you could create a web service and put it on GAE. So that could be way how to use it from your Swing app.
There is no reason why this approach shouldn't work.
Related
I'm going to start developing a new simple "X management" kind app, like contact management or events management. What I want to know is which tools would be the best to achieve it in the way I want.
My app needs to be a web app running on a server that has a mysql database to save and retrieve some simple information. This app must have a web client but I want it to be able to be extended to work with an Android app client.
Things I've thought:
I've worked on Java with facelets and JPA travels management app running on a GlassFish server on localhost with a JSF web view, so maybe my web client and the full app could be done with this.
I've worked with web services such as SOAP and REST with Jaxb and xml schemes to retrieve information parsing some webs into xml or json to show on a client .net app. So I've thought I can add to my app, like last topic we talked about, a REST web service layer to easily work as I want, or at least I think it would be easy. If I do this the Android app could share the same app core code but using the REST service.
My question is what could be the best way to do an app with 2 client side in different platforms that could share some code to be easy to extend it moreover to a desktop app. I've talked about these 2 options because I'm a students of computers at university and those are the tools I know, but I can easy learn more. I've also think about just a REST service and create a web and an Android client to work on same service or something like that.
This post is getting long, so here is the summary: What technologies and tools do you think are the best choice to create an java web app that needs to have web and Android client? Also what server, like tomcat, GlassFish or another, should I use? And what about persistence layer? JPA with mysql is the best I know to work with.
Thanks a lot.
P.D: I work with eclipse
From my point of view:
You can use java jersey and java spring both ( java spring as Dependency injection) for creating RESTful Web service. So, In server side you will create endpoint and you can access data from any platform through those endpoint.
Server can be anyone. It's up to you. I always try to use tomcat but tomcat is not a full JavaEE container it's only a servlet container. So if you want to use full JavaEE version then you should use Glassfish.
And yes JPA .It can be easily used in any environment supporting JPA including Java SE applications, Java EE application servers, Enterprise OSGi containers etc.
On the other hand, still choice is yours.
I am shifting my applications to cloud foundry. I have pushed my front end as an html app and my backend REST services provider as a Java app. Now, I want to make HTTP calls to my backend java app from my html app. I know I can hardcode java app's url, but what is the best practice here? I can't seem to find anything after considerable world wide web search.
Best practice is to use a dedicated directory service like Eureka to discover your backend Java app. Chris Richardson provides a good overview here:
http://microservices.io/patterns/client-side-discovery.html
Spring Boot/Spring Cloud make it extremely easy to a Eureka server up and running, and for your Java app to register with the server:
http://cloud.spring.io/spring-cloud-netflix/
For your HTML app, you will want to use a Javascript client library to access your directory service, like this one:
https://www.npmjs.com/package/eureka-js-client
I have been looking for an answer since an long time now and i gte answer that i Should use RestApi or i should try it with this and that code but now i want to aks what is the easiest and securest way to send data from and desktop app to an web app and then get the web apps respond and giving it back to the desktop app. I used the direct way with hardcoding the passwords and all the database things so the desktop app will directly connect to the Database but that isn't secure at all. If you could provide me with a link or with the code i would help me more then just giving hints and playing hide and seek with me :)
Thanks in advance
You could use Web Services like , RESTful or WSDL. I think you could start it from WSDL. Othewise you could use encryption methods your own.
Please refer following links to get some idea
Web Service Introduction
https://docs.oracle.com/cd/E19509-01/821-0236/ghyto/index.html
Here is the background of my situation:
I want to create an iPad application that interacts with a oracle SQL database. I have existing Java code from my Flex application that handles all the database requests, and modifications using the Spring Framework. The Flex Application ran as a web service through TomCat. Now I want to make that flex application into a mobile iPad version. I am having trouble figuring out what is the easiest way to use existing Java code and use it for the iPad because the iPad interacts using URL requests instead of direct with the Java.
My question is, can I use the existing Java code with the Spring framework to save time from coding all the back-end handling? Basically I want to access all the classes from my Java code by doing Requests from the iPad. Is this possible and will I need JSON or XML to interact between the iPad and the Java code?
Summary:
Can I use
iPad Objective-C <-----> Java (with spring framework) on TomCat Web Service to handle oracle SQL data handeling? If so, how and what technologies do I need? Will I need JSON or XML and how does that factor between the iPad and Java?
Thanks!
A good approach would be to design your app to communicate with RESTful services that return JSON. Once this is done your iPad app doesn't have to even know that the server code is written in Java.. it's just interacting over HTTP.
Here's a good tutorial on setting up your tomcat to host your RESTful services: http://www.vogella.com/articles/REST/article.html - I've used this for an app I'm developing. Spring isn't even necessary.
You could go XML, but JSON is just easier in my opinion. Here's a good blog outlining the good and bad of both sides. http://digitalbazaar.com/2010/11/22/json-vs-xml/
OK, I'm making the following presumptions.
Your flex application runs on a different machine from the Tomcat
server
Your flex application makes web service calls to the Tomcat server
So, the flex application doesn't know the underlying technology that provides the web services. It's just seeing/consuming the output
There's no reason why the iPad app can't do the same thing. There's no reason why it can't use the same web services that the Flex application uses. It could consume the same messages (Assuming it can handle the request/response format currently employed by the Flex application).
You can make changes if you like if you want to change the structure of the requests/responses between the clients. But the clients don't know (nor care) how the web services are implemented. They are just requesting and consuming info.
I'm creating a web app that runs on Google App Engine. I'm also developing a desktop client that needs to access/update data on the webapp.
I would like to create a web sevice api between the server and the client. What would be my best options?
According to GAE the do not support RMI og JAX out of the box.
I hate to answer my own question but Restlet is working on a GAE version. The current development version seems to work well.
http://wiki.restlet.org/docs_1.2/13-restlet/252-restlet.html