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Jersey Spider Web Service Hey Footing Event Inwards Java

After Restlet, Jersey is simply about other pop opened upwards source framework to do RESTful spider web services inwards Java. Bailiwick of Jersey conforms JAX-RS specification in addition to genuinely it is the reference implementation of JAX-RS (JSR 311)(harus di isi/search?q=restlet-helloworld-example-in-java-and-Eclipse">Restlet HelloWorld Example in addition to today we'll come across the Jersey HelloWorld Example. Typically, when a developer thinks of creating a RESTful spider web service using Java, they assume that using a Java EE application server is the entirely agency to do this type of application. However, in that place are simpler, lightweight option methods for creating RESTful applications available using Java SE. This tutorial demonstrates i such option using the Grizzly Web server along amongst the Bailiwick of Jersey REST framework. Grizzly's principal job instance is the spider web server ingredient for the GlassFish application server.

Jersey HelloWorld Example

Here is the unproblematic RESTful Web Service do using Bailiwick of Jersey REST framework. This service returns a message when a GET asking is sent to the "/hello" URL. If the asking also contains a asking parameter in addition to thus it is used inwards the response message.

import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam;  @Path(value = "/hello") public class JerseyHelloWorldRESTService {  @GET @Path(value="/{param}") public String hello(@PathParam(value = "param") String name){  return "Hello " + advert + ", Welcome to Jersy basis of RESTful spider web service"; }  }

Error

Starting jersey grizzly ...
Jun 01, 2016 3:57:19 PM com.sun.jersey.api.core.PackagesResourceConfig init
INFO: Scanning for beginning resources in addition to provider classes inwards the packages:

Jun 01, 2016 3:57:19 PM com.sun.jersey.api.core.ScanningResourceConfig logClasses
INFO: Root resources classes found:
shape JerseyHelloWorldRESTService
Jun 01, 2016 3:57:19 PM com.sun.jersey.api.core.ScanningResourceConfig init
INFO: No provider classes found.
Exception inwards thread "main" java.lang.IllegalArgumentException: No container provider supports the type shape org.glassfish.grizzly.http.server.HttpHandler
at com.sun.jersey.api.container.ContainerFactory.createContainer(ContainerFactory.java:196)
at com.sun.jersey.api.container.ContainerFactory.createContainer(ContainerFactory.java:134)
at com.sun.jersey.api.container.grizzly2.GrizzlyServerFactory.createHttpServer(GrizzlyServerFactory.java:242)
at JerseyServer.startServer(JerseyServer.java:24)
at JerseyServer.main(JerseyServer.java:28)

If yous acquire the inwards a higher house fault in addition to thus yous tin ambit the sack add together next maven dependency (org.glassfish.jersey.containers jersey-container-jdk-http ) to solve the problem:com.sun.net.httpserver.HttpHandler"):

    <dependency>         <groupId>org.glassfish.jersey.containers</groupId>         <artifactId>jersey-container-jdk-http</artifactId>         <version>2.18</version>     </dependency> 

You could alter the version according to your environment. Remember the exception's fault message says "No container provider supports the type interface". This dependency provides the container needed to run the Jersey.

Beware of divergence betwixt Bailiwick of Jersey in addition to Jersey2

It's rattling tardily to confuse amongst 2 dissimilar version of Jersey, inwards the outset version the classes belongs to com.sun.jersey in addition to inwards instant the framework classes goes to org.glassfish.jersey. Essentially entirely the parcel is dissimilar but amongst diverse theme JAR, it's rattling tardily that JARs from Bailiwick of Jersey 1.x mixed amongst JARs from Jersey2.x in addition to raising dreaded NoClassDefFoundError in addition to it's closed cousin ClassNotFoundException.

The parcel advert changed because Bailiwick of Jersey squad is forthwith job of Glassfish. The version below 2 was using com.sun.jersey parcel but forthwith since the fellowship is dissimilar they are using org.glassfish.jersey. And Yes, in that place are simply about to a greater extent than differences inwards code betwixt version 1.x in addition to 2.x. Key takeaway doesn't mix classes in addition to JARS from Bailiwick of Jersey 1.x amongst Bailiwick of Jersey 2.x, come across here for to a greater extent than details on the error.



That's all close Jersey Hello basis example.  Jersey framework is to a greater extent than than the JAX-RS Reference Implementation. Bailiwick of Jersey provides its ain API that extends the JAX-RS toolkit amongst additional features in addition to utilities to farther simplify RESTful service in addition to customer development. Bailiwick of Jersey also exposes numerous extension SPIs thus that developers may extend Bailiwick of Jersey to best suit their needs.

Further Learning
REST Java Web Services
REST API Design, Development & Management
answer)

Top 10 REST Web Service Interview Questions (answer)

Spring HelloWorld Example using Dependency Injection (tutorial)

The divergence betwixt PUT vs POST inwards REST Web Service? (article)

How to do JDBC connectedness puddle using Spring? (tutorial)

How to parse large JSON response using Jackson? (tutorial)

20 Hibernate Interview Questions for Java developers (article)

The divergence betwixt Idempotent in addition to prophylactic methods inwards HTTP? (answer)

How to convert JSON array to String array inwards Java? (tutorial)

P.S. - If yous desire to larn how to railroad train RESTful Web Services using Spring Framework, banking concern jibe out Eugen Paraschiv's REST amongst Spring course. He has of late launched the certification version of the course, which is total of exercises in addition to examples to farther cement the existent basis concepts yous volition larn from the course.

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