I need to change different log levels in runtime and I want to control the log levels changes by using restful webservices, but I got struck how to achieve this .
can any of you help me on this?
From the below Image from Jconsole you can see log back operations like setLoggerLevel & getLoggerLevels.
I need to expose these operations via Restful Webservices instead of accessing it from Jconsole.
Take a look at https://jolokia.org.
It exposes the JVM's JMX services via REST.
Related
I know some basic programming languages but im new at using API's.
Can someone please explain how, or where do i run my API's codes?
Will the API's be run on the website i'm trying to get my data from or can it be run on a client or from another different running environment or platform?
Apis should only (I say "should" because I am not sure that something like this can be done on the client side) to run on the server.
when you get information from an api you are not executing it on the client. you are only getting the data you requested for the endpoints you used.
Do you plan to use REST APIs as a consumer or producer? That is, do you want to expose your data, systems and processes as resources for an end consumer, or do you want to be the consumer creating applications that leverage services?
The Producer
To produce REST APIs, you'll need to run your API providers using a web server. Just about any web server will do, so long as it can map resource paths to functions. Some common ones are:
Node.JS with Express.js
Nginx with Python/Flask
Java using Spring
You should be able to run whatever you chose on nearly any hosting provider, cloud VM or wherever else you usually run websites.
The Consumer
You can use Rest APIs anywhere you have network connectivity. You'll find this commonly in mobile applications, web applications, IoT devices, etc where data are combined from multiple providers on to a single application for end users. The key feature as a consumer you'll be looking for is a directory of API providers from which you can build your application.
ProgrammableWeb maintains one such list.
In a "computer system" there are two web servers that manage independent applications, both using JSP technology. There is a necessity to have access from server A to information stored in server B. In case of interconnection with:
Invocation of a data access service with GET/POST of an URL.
Definition and use of Web services.
Direct integration in Java, with Java RMI.
Which would be the best solution? Why? What are the advantages and disadvantages of each of them?
A solution would be to use REST API on the server from where you need to invoke the information. You might want to use an ajax call or just include contact via iframe.
Get call will be simple and quick to develop and maintain however if it is low latency and high throughput application then you might want to go with Java RMI.
Is there a way to connect JCR/CRX(AEM) remotely apart from RMI/WEBDAV/JNDI? WEBDAV & RMI are not recommended to be open in PROD environment so I don't want to take that route in spite of a working solution.
Options explored which doesn't seem to fit my use case:
SLING API - sling.apache.org/documentation/development/repository-based-development.html
OAK API - github.com/davidegiannella/adaptTo16
REST/JSON - adapt.to/2016/en/schedule/remote-resources.html . Will work for a direct resource access but not for querying or CRUD operations.
JCR API- http://experience-aem.blogspot.com/2015/05/aem-6-sp2-accessing-crx-remotely-using-jcr-remoting-davex.html or https://wiki.apache.org/jackrabbit/RemoteAccess
Any pointers?
Given that Apache Sling is very good at exposing resources via HTTP, my first option would be to use the Sling Get Servlet to get resources as JSON.
For instance, accessing http://localhost:8080/content.json will get you a JSON rendering of the resource at /content.
If you want to get more data in you can specify the number of children to traverse down the hierarchy using a selector. http://localhost:8080/content.2.json will give you the properties of content and those of the children and grand-children.
If that is not enough for you, you can always create a custom servlet and perform the rendering there.
I want to implement REST service in gwt .But I don't know how to go about it. I read some documents where they have implemented it using RestyGwt and jercy. But I have one app which is deployed on tomcat. Then situation is that my client side app is calling the methods on the application present on tomcat.
I have to implement it using REST so that my client side call will first go to Proxy service on client then it make REST call to the application on tomcat and fetch result and return. How can I do this in gwt. ?
As mentioned, you can only communicate with REST service.
Anyway, maybe take a look on dispatch concept in GWTPlatform and their way of implementing it. (https://github.com/ArcBees/GWTP/wiki/Rest-Dispatch).
Idea is easy, you have an action on client side which is registered to deal with rest url. You can define action interface with some additional annotations to tell what is excepected to be send and received. They are using piriti library for json serialization.
It is up to you if you need only client side implementation or you would like to use server side service creation too.
You can NOT implement a REST service in gwt, since gwt is thought as a client-side solution.
What the GWT kit provides for server side are a few utilities to facilitate the comunication between client-side and server-side when both are written in java (RPC, RF).
So you can consume a REST service from gwt (RequestBuilder, gwtquery-ajax, etc), but if you want to provide REST services you need a 3party solution for your server side like Jersey, CXF, etc.
There are, though, 3party solutions which provides the server side and client simultaneously like restygwt, errai-jax, etc.
If you are looking for a simple and reliable solution to query rest services from the client, in this question you have a client implementation done with gwtquery (ajax, databinding, promises)
Is there a way to implement RESTful WebService using Spring 3 (or not) that does not use any web container?
Thank you !
I assume that the RESTful request will arrive over HTTP? So something needs to listen on the appropriate port and dispatch requests off to the service code. Obviously you can write such code, but you are likely to end up with something not very different from a Web Server.
If your objective is to embed this capability in some context then a lighweight container such as Jetty (as proposed by skaffman) seems like an answer - I'd be reluctant to write my own code instead
Using a framework such as JAX-RS makes writing REST services very easy, so if the actual objective is develop RESTful services quickly then I'd be prepared to live with a container that does the work for me.
In theory, yes - the various Spring-WS components are decoupled from the Servlet API. So you could, in theory, use the webserver built in to the Sun Java6 JRE.
In practice, this would be a lot of extra work. You'd have to bridge the Sun Web Server API to the Spring-WS API.
As an alternative to traditional Servlet containers, I can highly recommend Embedded Jetty, where your app can start up a lightweight servlet container within itself, and serve Spring-WS from that.