Now that the Web Service interfaces are defined (HelloWorld.java,FileManagement.java), let's look at their implementation details.

• The HelloWorldImpl.java implements HelloWorld.java and returns the string message. Notice the annotation @WebService(endpointInterface = "com.yosanai.tutorial.ws.hellowebservice.HelloWorld") which basically defines the end points interface contract.

  package com.yosanai.tutorial.ws.hellowebservice;
  
  import javax.jws.WebService;
  
  /**
   * @author Saravana P Shanmugam
   * 
   */
  @WebService(endpointInterface = "com.yosanai.tutorial.ws.hellowebservice.HelloWorld")
  public class HelloWorldImpl implements HelloWorld {
  
  	public String sayHi(String text) {
  		return "Hello " + text;
  	}
  }
  

• Similarly the FileManagementImpl.java implements FileManagement.java and receives the incoming File.java object; reads the file content present in it and returns a string message with the file name and file length in it. Notice the annotation @WebService(endpointInterface = "com.yosanai.tutorial.ws.hellowebservice.FileManagement") which defines the end points interface contract.

  package com.yosanai.tutorial.ws.hellowebservice;
  
  import java.io.InputStream;
  
  import javax.jws.WebService;
  
  import org.apache.cxf.helpers.IOUtils;
  
  /**
   * @author Saravana P Shanmugam
   * 
   */
  @WebService(endpointInterface = "com.yosanai.tutorial.ws.hellowebservice.FileManagement")
  public class FileManagementImpl implements FileManagement {
  
  	/*
  	 * (non-Javadoc)
  	 * 
  	 * @see
  	 * com.yosanai.tutorial.ws.hellowebservice.FileManagement#upload(com.yosanai
  	 * .tutorial.ws.hellowebservice.File)
  	 */
  	@Override
  	public String upload(File file) throws Exception {
  		String ret = null;
  		InputStream ins = file.getFileContent().getInputStream();
  		byte[] bytes = IOUtils.readBytesFromStream(ins);
  		ret = "Read " + bytes.length + " bytes of data from the uploaded file "
  				+ file.getFileName();
  		return ret;
  	}
  
  }
  

• That's it the web service implementation is done :-). With simple annotations we have exposed the web service.