Building HATEOAS Links with JAX-RS
Learn to build JAX-RS 2.0 HATEOAS links in REST resources using it’s javax.ws.rs.core.Link, javax.ws.rs.core.UriBuilder and javax.ws.rs.core.UriInfo classes.
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Tutorials
RESTEasy – Enable Gzip Compression Content Encoding
JAX-RS Resteasy has automatic GZIP decompression support. If the client framework or a JAX-RS service receives a message body with a Content-Encoding of “gzip”, it will automatically decompress it. The client framework automatically sets the Accept-Encoding header to be “gzip, deflate”. So you do not have to set this header …
JAX-RS 2.0 RESTEasy 3.0.2.Final Client API example
JAX-RS 2.0 has brought lots of improvement over previous version. One of major improvement is client API which was completely missing in JAX-RS 1.0. While it was easy to write a portable JAX-RS service, each JAX-RS implementation defined their own proprietary API. JAX-RS 2.0 fills in this gap with a …
[SOLVED] java.lang.ClassNotFoundException: org.glassfish.jersey.client.JerseyClientBuilder
If you are using RESTEasy 3.x.y which has been support for JAX-RS 2.0, and you are trying to write RESTEasy client then you can face this exception. Full stack trace might look like this: Root cause Probably you are following trying to wrire the client code as follows: JAX-RS relies …
Securing REST APIs with RESTEasy Filter
Learn to use RESTEasy ContainerRequestFilter to create security filter which is able to to perform authentication and authorization on RESTEasy based web applications.
RESTEasy Basic Authentication and Authorization Tutorial
Security is an integral part of any enterprise application. Security involves two phases i.e. authentication and authorization. Authentication verifies who you are. Authorization verifies what you are authorized to do. In this post, we will learn to build role based basic authentication/ authorization security for REST APIs. Sections in this …
RESTEasy Cache control with ETag Example
ETags or entity tags are useful HTTP headers which can help in building a super fast application by minimizing the server load on system. ETag is set to the response to the client so a client can use various control request headers such as If-Match and If-None-Match for conditional requests. …
Exception Handling with RESTEasy ExceptionMapper
Learn to create and handle custom exceptions using resteasy ExceptionMapper interface implementations. It must be annotated with @Provider to work.
RESTEasy Bean Validation using Hibernate Validator Provider
The Bean Validation API (JSR-303) defines a meta-data model and API for bean validation based on annotations. The functionality is achieved through the resteasy-hibernatevalidator-provider component. In order to integrate, we need to add resteasy-hibernatevalidator-provider.jar and hibernate-validator.jar files to the classpath. If you are using maven the, you need to add …
Generate JS/AJAX Client with RESTEasy JSAPI
RESTEasy can generate a JavaScript API that uses AJAX calls to invoke JAX-RS operations. Learn to use JSAPIServlet with examples.
Intro to JAX-RS Custom Validation
In this example, I will show the usage of ValidatorAdapter in association with @ValidateRequest annotation. For sending the request from UI, I will use ajax. You can use form submission if needed in your project. In that case, you will need @FormParam annotation to capture request parameters. Below if the …
RESTEasy File Upload – Html Form Example
In previous post, we learned about uploading a file in JAX-RS RESTEasy application where the client to upload the file was built using HttpClient library. This client was pure java client and does not have any UI associated. In this post, I am building the same uploading feature but this …
Uploading a File with RESTEasy and HttpClient
In previous posts, we learned about file downloading and building RESTful clients. Now, let move further. In this post, I am giving sample code of file upload using jax-rs resteasy. For uploading the file, httpclient library will be used instead of HTML form. I am using MultipartFormDataInput class which is …
Consuming REST APIs with RESTEasy Client
So far in this blog, we have been learning about building RESTful webservices which are server side components. In this post, we will learn to build a RESTful client for consuming the webservices written in previous posts. I will be re-using the code base written for RESTEasy + JAXB xml …
RESTEasy – Share Context Data with ResteasyProviderFactory
Learn to use ResteasyProviderFactory to share data between multiple classes and interceptors in a RESTEasy based web application.
JAX-RS @Path URI Matching – Static and Regex URIs
Learn to use JAX-RS @Path annotation and write resource path in it for URI matching. Paths can be written in simple form (static or path parameter) or complex form (regex based). 1. JAX-RS @Path URI Matching Types JAX-RS @Path annotation is used to specify the URI on which the resources …
RESTEasy – File Download Example
RESTEasy is JBOSS provided implementation of JAX-RS specification for building RESTful Web Services and RESTful Java applications. RESTEasy works in combination with HTTP media types for providing the response in specific formats such as images, pdf or text. The core component to configure for enabling support for multiple media types …
Writing a Native Java REST Client
So far in this blog, we have been learning about building RESTful webservices which are server side components. In this post, we will learn to build a RESTful client for consuming the webservices written in previous posts. I will be re-using the code base written for RESTEasy + JAXB xml …
JSON Response with RESTEasy
Learn to use Jackson or Jettison libraries with RESTEasy to convert the API response into JSON format with example.
XML Response with RESTEasy and JAXB
Learn to use Jackson with RESTEasy to convert the API response into XML format with example.
RESTEasy Tutorial for Beginners
RESTEasy example web application to to create REST APis using maven and tomcat server. This resteasy tutorial helps in create restful webservices.
Building HATEOAS Links with RESTEasy and JAX-RS
HATEOAS is a constraint on REST that says that a client of a REST application need only know a single fixed URL to access it. Any and all resources should be discoverable dynamically from that URL through hyperlinks included in the representations of returned resources.