Ruby 1.9.2 リファレンスマニュアル > ライブラリ一覧 > drbライブラリ > DRb::DRbProtocolモジュール

module DRb::DRbProtocol

クラスの継承リスト: DRb::DRbProtocol

Abstract

Module managing the underlying network protocol(s) used by drb.

By default, drb uses the [[c:DRbTCPSocket protocol]]. Other protocols can be defined.

A new protocol is registered with the DRbProtocol module using the add_protocol method.

For examples of other protocols, see DRb::DRbUNIXSocket in drb/unix, and HTTP0 in sample/http0.rb and sample/http0serv.rb in the full drb distribution.

All of these methods should raise a DRb::DRbBadScheme error if the URI does not identify the protocol they support (e.g. "druby:" for the standard Ruby protocol). This is how the DRb::DRbProtocol module, given a URI, determines which protocol implementation serves that protocol.

モジュール関数

add_protocol(prot)

Add a new protocol to the DRbProtocol module.

A protocol must define the following class methods:

open(uri, config)

Open a client connection to the server at uri, using configuration config. Return a protocol instance for this connection.

open_server(uri, config)

Open a server listening at uri, using configuration config. Return a protocol instance for this listener.

uri_option(uri, config)

Take a URI, possibly containing an option component (e.g. a trailing '?param=val'), and return a [uri, option] tuple.

The DRbProtocol module asks each registered protocol in turn to try to open the URI. Each protocol signals that it does not handle that URI by raising a DRb::DRbBadScheme error. If no protocol recognises the URI, then a DRb::DRbBadURI error is raised. If a protocol accepts the URI, but an error occurs in opening it, a DRb::DRbConnError is raised.

open_server

The protocol instance returned by open_server must have the following methods:

accept

Accept a new connection to the server. Returns a protocol instance capable of communicating with the client.

close

Close the server connection.

uri

Get the URI for this server.

open

The protocol instance returned by open must have the following methods:

send_request (ref, msg_id, arg, b)

Send a request to ref with the given message id and arguments. This is most easily implemented by calling DRbMessage.send_request, providing a stream that sits on top of the current protocol.

recv_reply

Receive a reply from the server and return it as a [success-boolean, reply-value] pair. This is most easily implemented by calling DRb.recv_reply, providing a stream that sits on top of the current protocol.

alive?

Is this connection still alive?

close

Close this connection.

open_server().accept()

The protocol instance returned by open_server().accept() must have the following methods:

recv_request

Receive a request from the client and return a [object, message, args, block] tuple. This is most easily implemented by calling DRbMessage.recv_request, providing a stream that sits on top of the current protocol.

send_reply(succ, result)

Send a reply to the client. This is most easily implemented by calling DRbMessage.send_reply, providing a stream that sits on top of the current protocol.

close

Close this connection.

Methods

Classes