I am developing a mobile app which retrieves data from a Liferay-based portal. I am using JSON web services to access the data which works well for e.g. Blog Entries. How can I make a new web service for existing tables? Each tutorial I have found starts with the definition of a new entity (i.e. database table), but I don't need that. I just want to access existing data in such a way which is not provided by system ws, e.g. to filter web content which have a specific structure.
Note: I tried also a workaround, I managed to make a struts action which prints out the desired JSON data and returns null. When I enter the address for the action in a browser, I see the JSON string. But if I put it in my mobile app, I see an HTML code, it seems that it is redirected to the home page of the portal.
Neat trick if you don't want to define a new entity with servicebuilder: Just leave the entity empty, this defines just a type, but no fields, e.g. no underlying table. Then implement your methods by just delegating to whatever persistence you'd like to access (or even without any persistence).
<Entity name="Foo" local-service="true" remote-service="true">
</Entity>
This will create FooServiceImpl and FooLocalServiceImpl that you can use to implement your business logic, without any attached database table.
Related
Do any of the front end frameworks (Like Vue.js) have the ability to generate a prototype form/view directly from various an Endpoints?
I am wanting to quickly knock up a few forms to capture and submit data to a set of JSON Rest Post APIs and Display pages to render data retrieved from other JSON Rest Get APIs.
I don't want to have to go through the pain of having to map each and every field out in a set of .js file, it would be great if the boilerplate could just be generated from interface in a similar way to what Apache Isis does from a Domain model.
The above would allow me/clients to generate a UI directly off the interface and interact with it using a web browser in a similar way one would using Postman, without having to install and understand Postman.
You can try one of these:
https://vue-crud.github.io/
https://github.com/dionmaicon/vue-crudgen
https://github.com/ais-one/vue-crud-x - described in https://codeburst.io/vue-crud-x-a-highly-customisable-crud-component-using-vuejs-and-vuetify-2b1539ce2054
https://api-platform.com/docs/distribution/
I want to render a UI from a jSON string that has multiple layers.
The user should be able to enter data, which will then be stored and shared, without the overhead of the jSON Render Structure.
However, the assignment of the data must be possible.
The app renders a template from a multidimensional json string that can capture metrics (user inputs). The measured data are entered via text fields by the user.
There are different windows in the app, which are rendered from different json UI-render-files.
The stored algorithms in the windows at the Frontend differ.
The following should be possible:
All windows are created with different jSON strings (works with build_value now).
The user's input is saved. (Currently only works by saving the render json string with the data under a different name (with Package: Shared Preferences)).
The data entered by the user is copied from one window to the other window. (Data Binding / Data Mapping)
The data entered by the user will be sent to a backend.
I only have the idea to use id's in the render json, which allow a mapping.
Are there better solutions?
Saving the entered data is possible by saving the whole jSON - String with an other name.
The goal is to map the data.
It should also be possible for the user to insert another object for the measurement data acquisition at the client / device. The entered data must also be saved.
This sounds like a REST API. Then you would use a frontend framework like angular or react to take user input.
I could build this with a .net core web api with sql db as the backend. this would be a web service (REST API solution) on the backend of your solution.
Next I would integrate Swagger with dependency injection and add authentication.
now its time to create the front end that will use your tested Web Service.
you would have 1 side of your SPA POST new JSON to the Web service in a form.
you would have the other side GET the new record as a new tab with pagination or in a table with pagination.
This would be a good PoC for your idea and will let you learn the parts of the solutions architecture in your language of choice. the "design" would be the same no matter what language your choice.
backend web service can be done in a flask and with a MySQL DB. or with any other combo you have skills with.
the Frontend could be done in knockout.js, making it a little easier to learn than angular or react.
Please create new questions when you choose your software design. I would love to give answers for each:)
I would love to level up with you! ;)
I have a field in my website where I want users to enter book names that they can checkout from the database. I want it so that when they start typing the names I want suggestions or drop down under the input box matching the name of the book they are typing.
Is it possible to achieve something like this? I have a books table in my MySQL database and I am using Nodejs as my backend. I have searched a lot online but did not find anything related to this online. Therefore, I decided to ask the question here.
You have to send AJAX request with type GET and send the typed character to the Backend.
and in backend you have to do query for ex :select * from book where name like %input%
Then you have to return the result as an array to the front-end.
Finally, in your front-end code you have to render the result array under the input.
Also, you can use any ready jquery plugin to do this task in front-end code.
The UI element is commonly called a "typeahead" or autocomplete.
Twitter release their frontend component as a jQuery plugin called typeahead.js. Most frontend frameworks will have an equivalent plugin or component.
The backend datasource for the books is up to you to implement.
For small datasets you can render the required book data within the page so it is directly accessible from your javascript.
For large datasets you will probably need to create a backend "book search" service in Nodejs. Typeahead libraries can send that user input to a URL via an AJAX request and the service returns the matching results, usually as a JSON object.
Code for geek example for your stack.
You can make a drop-down menu with book names and using ajax you can get value from the input and search in database and display data .
I suggest you to use mongo db as database.
You can find tutorials in w3 schools or
in malayalam https://www.youtube.com/c/Crossroadstalk
Hi I am new for nopcommerce 3.5. I need to write a restful web service api to third party(for eg mobile) access the service. I know that we can access through Nop.Plugin.Misc.WebServices . I had enable the service from administrator site.
But now is my question. How can i call the web service for eg GetPaymentMethod , product list and etc
And if I want to write my custom web service by using web api. what is step to create? I cant find any documentation about the web service. Please guide me some example
Thanks
If you want a really quick start in writing a web service in NopCommerce, you can follow the MVC architecture and:
Create an Action method inside a Controller that you find appropriate for your purpose. For example, if you want access to a product list, you might create an Action inside CatalogController that follows the logic of the existing ProductList action.
Set up a Route in RouteProvider.cs to point to the Action you created. Based on this route you can deduce the URL of your service.
Do the processing that you need inside the Action. If this Action/service is to be called with parameters (in query string format: param=value¶m2=value2), you can just put these parameters in the Action's header:
public ActionResult QuickService(int param, string param2) { ... and .NET will take care of having them initialized.
Store results in an object (can also be an anonymous object) and at the end of your action, return it as Json: return Json(resultsObject); Again, ASP.NET takes care of the JSON serialization and automatically sets the Content-Type HTTP response header to "application/json".
You can consume the service calling the URL that corresponds to the route of your Action.
If you want users to be able to log in, by using the above method, it gets a little bit trickier. You need the webservice client to be able to accept and send cookies, as well as make appropriate services for Login, Logout, Register,...
However, in this case, you might be better off with a mobile version of the site.
Final note: If you don't want to alter base NopCommerce code, you can apply the steps above to a plugin. The majority of NopCommerce plugins follow the MVC architecture, so you can apply the steps above.
I am trying to build my application's admin UI using sling's userManager REST interface, but I would like to customize the json rendering. For example, I would like the response of "Get group" to include the members only if the requestor is a member.
I started by adding libs/sling/group/json.esp but I don't understand how I can get hold of the default response and customize it. Even if I had to query and form the json from scratch, where can I find information about APIs available to get this data from JCR/Sling?
I found that I could use ResourceTraversor to dump the resource object in json form but using new Packages.org.apache.sling.servlets.get.impl.helpers.ResourceTraversor(-1, 10000, resource, true) in the esp throws up an error
There are a few things to note here.
First, you should avoid putting your code under the libs directory. Your app code should live under the apps directory. When attempting to resolve a servlet for a URI, Sling will check apps before it checks libs so if you need to completely override functionality delivered with Sling, you would place your code in apps.
Second, what is (probably, depending on how you have things setup) happening when you request http://localhost:8080/system/userManager/group/administrators.tidy.1.json is the request is being handled by Sling's default GET servlet, because it finds no other script or servlet which is applicable. For research purposes it might be worth looking at the code for the default get servlet, org.apache.sling.servlets.get.impl.DefaultGetServlet, to see what it's using to render JSON. If you need to handle the rendering of a user group in a manner different than what the default GET servlet is doing, then you would need to create a servlet which is listening for requests for resources of type sling/group. It would probably be ideal to create a servlet for this purpose and register it with OSGI. http://sling.apache.org/site/servlets.html provides the various properties you would need to set to ensure the servlet resolver finds your servlet. Your servlet then would handle the request and as such would have direct and easy access to the requested resource.
Third, the particular need you specified is that you do not want the group members to render unless the requesting user is a member of the group requested. This is more of an access control issue than a rendering issue. Sling and Jackrabbit, out of the box, make as few assumptions as possible concerning how you might want your application to be setup. That being the case, you need to establish the access controls that are applicable for your particular use case. The wiki post on Access Control in the Jackrabbit wiki ( http://wiki.apache.org/jackrabbit/AccessControl ) goes into this to an extent.
Using directions from Paul Michelotti's answer, I researched further and found a suitable solution to my problem.
Sling accepts request filters (javax.servlet.Filter) through SCR annotations like the one below
#SlingFilter(scope = SlingFilterScope.REQUEST, order = Integer.MIN_VALUE)
Every request is passed down to the filter before it is processed by the servlet. Using the resourceType, I was able to distinguish requests to group.1.json and group/mygroup.1.json. Since the filter also has access to the current user, I was able to decide to deny the request if it did not abide by my security model and return a 404 status code.
Please refer to this page for details on filters. You can also check out the sample project urlfilter for directions on usage.