Saturday, February 10, 2018

Jersy Rest Webervice with eclipse and Weblogic 12c or tomcat


How to work with jersy rest webservice using eclipse and weblogic server/tomcat

Step 1: Create a dynamic web project in eclipse and provide project name





Step 2: open web.xml and add below configuration code for rest webservices.



  jersyRestService
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
      
        Jersey Web Application
        com.sun.jersey.spi.container.servlet.ServletContainer
    
    
        Jersey Web Application
        /rest/*
    



Step 3: Create one file name called weblogic.xml and add the below code.



12.2
    
        jax-rs
        2.0
        2.22.1.0
        false
    



Step 4: Download rest api related jar -http://repo1.maven.org/maven2/com/sun/jersey/jersey-archive/1.19.1/jersey-archive-1.19.1.zip Unzip the same and place the jar inside lib folder of the project.


Step 5: Create a class name called RestServiceAPI.java add below code.

package com.siva.restservice;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
/**
 * 
 * @author Siva
 *
 */

@Path("/helloRest")
public class SimpleRestService {
	
	
	@GET
	@Produces(MediaType.TEXT_PLAIN)
	public String getDetails(){
		System.out.println("This is Get request");
		return "Hello Welcome to Rest webservice";
	}
	@GET
	@Path("/getDetail/{requestParam}")
	@Produces(MediaType.TEXT_PLAIN)
	public String getDetailsWithParameter(@PathParam("requestParam") String requestParam){
		System.out.println("USer request paramater["+requestParam +"]");
		System.out.println("This is Get request");
		return "Hello Welcome to Rest webservice you have given input as -"+requestParam;
	}

}



Step 6: Create one config class called- ApplicationConfig.java
Right click on src-> Webservice->RestWebservice->select Classname- which class needs to be configured in ApplicationConfig Click Next-> Finish

package rest.application.config;

import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
/**
 * 
 * @author Siva
 *
 */
@ApplicationPath("resources")
public class ApplicationConfig  extends Application{

	public Set> getClasses(){
		return getRestClasses();
	}
	
	private Set> getRestClasses(){
	  Set> resources = new HashSet>();	
	  resources.add(com.siva.restservice.SimpleRestService.class);
	  return resources;
	}
	
}



Step 7: This is very important step

Run the weblogic server and open the console
http://localhost:7001/console provide username and password and login the same into weblogic server admin console

Step 8: Click on the Deployments- the install the jax-rs-2.0.war, which is inside-
Oracle_home/wlserver/common/deployable-libraries
If you are working on jsr311 then deploy jsr311-api-111.war which is available on same path.


For Tomcat Deployment Step 3 , 6,7,8 not required

Right click on the Project and Run AS - server- select appropriate server and deploy the same.

if you want to test in browser use-
http://localhost:8080/jersyRestService/rest/helloRest
http://localhost:8080/jersyRestService/rest/helloRest/getDetail/helloRequest


Step 9: Create rest client class which get the test results for rest webservice
package com.siva.restservice.test;

import javax.ws.rs.core.MediaType;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
/**
 * 
 * @author Siva
 *
 */
public class RestServiceClient {
	
	public static void main(String[] args) {
		String uri = "http://localhost:8080/jersyRestService/rest/helloRest";
		try{
			
			Client client = Client.create();
			WebResource resource = client.resource(uri);
			String response = resource.type(MediaType.TEXT_PLAIN).get(String.class);
			System.out.println("Response from Rest webservice["+response+"]");
			String request = "GetRestWithParam";
			uri = uri.concat("/getDetail/").concat(request);
			resource = client.resource(uri);
			String response1 = resource.type(MediaType.TEXT_PLAIN).get(String.class);
			System.out.println("Response from Rest webservice with parameter["+response1+"]");
		}
		catch(Exception ex){
			ex.printStackTrace();
		}
	}

}


Step 10: You can see the output as below

Response from Rest webservice[Hello Welcome to Rest webservice]
Response from Rest webservice with parameter[Hello Welcome to Rest webservice you have given input as -GetRestWithParam]


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