snake-rpc

An RPC framework based on Hessian(http://hessian.caucho.com)

the name 'snake' comes from the Animal Year of snake in Chinese(the year 2013).

compared with hessian, snake-rpc has several new features:

• ablity to serialize InputStream/OutputStream;
• unlimited InputStream/OutputStream parameters;
• ablity to reuse remote objects returned by a method call;

for example:

Connection con = client.getConnection();
ResultSet rs = con.queryForResultSet("select * from users");

this feature is very useful for those objects which are valid only on the server-side, e.g, the Connection or ResultSet objects;

see https://github.com/bluejoe2008/snake-rpc/blob/master/test/cn/bluejoe/snake/client/SnakeClientTest.java for example usage.

###server side codes

• Step 1: since a SnakeServlet class is provided by snake-rpc, users can create a derived classes and register accessible service objects within init() methods:

    public class MySnakeServlet extends SnakeServlet
    {
    
    	@Override
    	public void init(ServletConfig config) throws ServletException
    	{
    		super.init(config);
    		//declares that FileObjects are only avaliable on server side
    		_skeleton.declareServerSideObjectClass(FileObject.class);
    		//register an object named file
    		_skeleton.registerServiceObject("file", new FileObjectImpl(new File("./testdir")));
    	}
    
    }
  

• Step 2: configures the Servet in web.xml as normal.

• Step 3: start up web server.

###client side codes

• Step 1: creates a SnakeClient first:

    HttpHost hc = new HttpHost("http://localhost:8080");
    _client = new SnakeClient(hc, "http://localhost:8080/rpc", "", "");
  

• Step 2: uses createServiceObjectProxy() to retrieve remote object:

    FileObject fo = (FileObject) _client.createServiceObjectProxy("file", FileObject.class);
  

• Step 3: now you got the FileObject object, just call methods on it:

    FileObject[] cfs = fo.listFiles();
    Assert.assertEquals(1, cfs.length);
    FileObject cfs0 = cfs[0];
    Assert.assertEquals(false, cfs0.isDirectory());
    Assert.assertEquals(f1.length(), cfs0.length());