java - Java web services to allow large file streaming

Question

I am building a java web services server that needs to scale and to be highly available. User can upload large file (~20M) through the services. SOAP is preferred.

My question are: is there any such a web service framework which support large file streaming? Any building blocks that I should consider? Any good practices?

Any thoughts would be appreciated. Thanks.

Answer 1

如果你需要高性能，webservices 不是很好。

您可以尝试（流式 SOAP 附件）：

• http://docs.oracle.com/cd/E12840_01/wls/docs103/webserv_adv/mtom.html
• 例如 http://www.mkyong.com/webservices/jax-ws/jax-ws-attachment-with-mtom/

File : ImageServer.java //服务端点接口

package com.mkyong.ws;     
import java.awt.Image; 
import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import javax.jws.soap.SOAPBinding.Style;



@WebService
@SOAPBinding(style = Style.RPC)
public interface ImageServer{

    //download a image from server
    @WebMethod Image downloadImage(String name);

    //update image to server
    @WebMethod String uploadImage(Image data);

}

//File : ImageServerImpl.java
package com.mkyong.ws;

import java.awt.Image;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.jws.WebService;
import javax.xml.ws.WebServiceException;
import javax.xml.ws.soap.MTOM;

//Service Implementation Bean
@MTOM
@WebService(endpointInterface = "com.mkyong.ws.ImageServer")
public class ImageServerImpl implements ImageServer{

    @Override
    public Image downloadImage(String name) {

        try {

            File image = new File("c:\\images\\" + name);
            return ImageIO.read(image);

        } catch (IOException e) {

            e.printStackTrace();
            return null; 

        }
    }

    @Override
    public String uploadImage(Image data) {

        if(data!=null){
            //store somewhere
            return "Upload Successful";
        }

        throw new WebServiceException("Upload Failed!");

    }

}