chickadee » remote-mailbox

remote-mailbox

Documentation

Purports to provide an API for sending and receiving remote messages. This egg attempts to duplicate the mailbox egg semantics across an IP connection.

Common Parameters

remote-mailbox-default-tcp-port-no

remote-mailbox-default-tcp-port-no #!optional TCP-PORT-NOparameter

The standard port number to establish a remote mailbox connection.

Defaults to the environment variable REMOTE_MAILBOX_TCP_PORT, or 63001 if undefined at startup.

remote-mailbox-default-expected-size

remote-mailbox-default-expected-size #!optional EXPECTEDparameter

The expected number of remote mailboxes, either as client or server.

EXPECTED
fixnum ; Defaults to 8.

Defaults to the environment variable REMOTE_MAILBOX_EXPECTED, or 8 if undefined at startup.

remote-mailbox-default-hostname

remote-mailbox-default-hostname #!optional HOSTNAMEparameter

The host name to establish a remote mailbox connection.

Defaults to the environment variable REMOTE_MAILBOX_HOSTNAME, or "localhost" if undefined at startup.

Client

Usage

(require-extension remote-mailbox-client)

remote-mailbox-default-connect

remote-mailbox-default-connect #!optional PROCEDUREparameter

The procedure used to establish network connections for a remote mailbox. Defaults to tcp-connect and must be signature-compatible.

remote-mailbox-default-hostname

remote-mailbox-default-hostname REMOTE-MAILBOXparameter

Returns the REMOTE-MAILBOX hostname.

make-remote-mailbox

(make-remote-mailbox NAME [#:hostname HOSTNAME] [#:tcp-port-no TCP-PORT-NO] [#:connect CONNECT]) -> remote-mailboxprocedure

Returns a unique remote-mailbox object for the specified NAME.

NAME
string ;
HOSTNAME
string ;. Defaults to (remote-mailbox-default-tcp-port-no).
TCP-PORT-NO
fixnum in [0 65535] or {{#f}} ; Defaults to (remote-mailbox-default-hostname).
CONNECT
procedure ; Defaults to (remote-mailbox-default-connect).

When TCP-PORT-NO is #f the HOSTNAME must contain the port or service.

remote-mailbox?

remote-mailbox? OBJECTprocedure

Is the OBJECT a valid remote-mailbox?

remote-mailbox-name

remote-mailbox-name REMOTE-MAILBOXprocedure

Returns the REMOTE-MAILBOX name.

remote-mailbox-tcp-port-no

remote-mailbox-tcp-port-no REMOTE-MAILBOXprocedure

Returns the REMOTE-MAILBOX tcp-port-no.

remote-mailbox-connected?

remote-mailbox-connected? REMOTE-MAILBOXprocedure

Is the REMOTE-MAILBOX connected? (Has it been used?)

remote-mailboxes

remote-mailboxesprocedure

Returns mailboxes.

remote-mailbox-send!

remote-mailbox-send! REMOTE-MAILBOX OBJECTprocedure

Transmit the OBJECT to the REMOTE-MAILBOX.

drop-remote-mailbox!

drop-remote-mailbox! REMOTE-MAILBOXprocedure

Invalidate and forget the REMOTE-MAILBOX.

drop-remote-mailboxes!

drop-remote-mailboxes!procedure

Invalidate and forget all the remote mailboxes. Performs a reset to the initial state.

Server

Usage

(require-extension remote-mailbox-server)

remote-mailbox-default-listen

remote-mailbox-default-listen #!optional PROCEDUREparameter

The procedure used to establish network connections for a remote mailbox. Defaults to tcp-listen and must be signature-compatible.

remote-mailbox-default-auto-create?

remote-mailbox-default-auto-create? #!optional AUTO-CREATE?parameter

Automatically create local-mailbox? Defaults to #t.

make-remote-mailbox-server

(make-remote-mailbox-server [#:name NAME] [#:tcp-port-no TCP-PORT-NO] [#:listen LISTEN] [#:request-limit REQUEST-LIMIT] [#:auto-create? AUTO-CREATE?] [#:debug DEBUG])procedure

Creates and returns a remote-mailbox-server. Uses make-tcp-server to create a server procedure. The server threads spawned by this procedure are continuously processing remote mailbox sends until the connection is closed.)

NAME
symbol ; Defaults to rtmbsv#.
TCP-PORT-NO
fixnum in [0 65535] or {{#f}} ; Defaults to (remote-mailbox-default-tcp-port-no)
LISTEN
procedure ; Defaults to (remote-mailbox-default-listen)
REQUEST-LIMIT
fixnum ; The tcp-server upper limit for currently executing requests. Defaults to 10000.
AUTO-CREATE?
boolean ; Automatically create local-mailbox. Defaults to #t
DEBUG
(or false string) ; Print tcp diagnostics with DEBUG prefix when true. Defaults to #f

make-remote-mailbox-server-thread

make-remote-mailbox-server-thread REMOTE-MAILBOX-SERVERprocedure

Returns a thread that, when started, will run the REMOTE-MAILBOX-SERVER.

remote-mailbox-server?

remote-mailbox-server? OBJECTprocedure

Is the OBJECT a remote-mailbox-server?

remote-mailbox-server-name

remote-mailbox-server-name REMOTE-MAILBOX-SERVERprocedure

Returns the name of the specified REMOTE-MAILBOX-SERVER.

remote-mailbox-server-auto-create?

remote-mailbox-server-auto-create? REMOTE-MAILBOX-SERVERprocedure

remote-mailbox-server-listener

remote-mailbox-server-listener REMOTE-MAILBOX-SERVERprocedure

Returns the listener object for the specified REMOTE-MAILBOX-SERVER.

remote-mailbox-server-request-limit

remote-mailbox-server-request-limit REMOTE-MAILBOX-SERVERprocedure

remote-mailbox-server-debug

remote-mailbox-server-debug REMOTE-MAILBOX-SERVERprocedure

remote-mailbox-server-run!

remote-mailbox-server-run! REMOTE-MAILBOX-SERVERprocedure

Starts the server continuously processing remote mailbox sends until the connection is closed.

remote-mailbox-server-start!

remote-mailbox-server-start! REMOTE-MAILBOX-SERVERprocedure

Starts the server in a thread continuously processing remote mailbox sends until the connection is closed.

Returns the started thread.

remote-mailbox-server-stop!

remote-mailbox-server-stop! REMOTE-MAILBOX-SERVERprocedure

Closes the connection & stops the server thread.

server-local-mailbox

server-local-mailbox REMOTE-MAILBOX-SERVER NAMEprocedure

Returns the mailbox of NAME for REMOTE-MAILBOX-SERVER (a mailbox object as returned by the procedure make-mailbox). Should the mailbox not exist it will be created if the REMOTE-MAILBOX-SERVER has a true AUTO-CREATE? flag, otherwise returns #f.

To receive remote messages:

(mailbox-receive! (server-local-mailbox REMOTE-MAILBOX-SERVER NAME))

drop-server-local-mailbox!

drop-server-local-mailbox! REMOTE-MAILBOX-SERVER NAMEprocedure

Forget the server's mailbox.

server-local-mailboxes

server-local-mailboxes REMOTE-MAILBOX-SERVERprocedure

Returns a list of all the mailboxes created for the server.

Remote Mailbox Service

A, singleton, convenience interface for remove-mailbox-server.

Usage

(require-extension remote-mailbox-service)

remote-mailbox-service

remote-mailbox-service NAME #!optional CREATE? DEBUGprocedure

This is a convenience interface and only recommended for the simplest of situations.

Returns the mailbox for NAME.

The DEBUG argument is passed on to tcp-server which will print tcp diagnostics with DEBUG as a prefix. The other parameters to make-remote-mailbox-server are defaulted. The default server is created and run in a separate thread upon the first call.

The AUTO-CREATE? argument is passed on to server-local-mailbox.

To receive remote messages:

(mailbox-receive! (remote-mailbox-service NAME))

remote-mailbox-service-info

remote-mailbox-service-infoprocedure

The remote-mailbox-server & thread for remote-mailbox-service.

remote-mailbox-service-stop!

remote-mailbox-service-stop!procedure

The thread object for local-mailbox.

Adapter

Usage

(require-extension remote-mailbox-adapter)

serializer

serializer #!optional PROCEDUREparameter

Parameter for Scheme object serialization procedure. Default is s11n::serialize.

deserializer

deserializer #!optional PROCEDUREparameter

Parameter for Scheme object deserialization procedure. Default is s11n::deserialize.

deserializer-input

deserializer-input #!optional INPUT-PORTparameter

Parameter for deserialization procedure input. Default is (current-input-port).

serializer-output

serializer-output #!optional OUTPUT-PORTparameter

Parameter for serialization procedure output. Default is (current-output-port).

serialize

serialize OBJECT #!optional OUTPUT-PORT serializer-outputprocedure

Serialize the OBJECT to the OUTPUT-PORT.

deserialize

deserialize #!optional INPUT-PORT deserializer-inputprocedure

Deserialize the OBJECT from the INPUT-PORT.

Requirements

tcp-server s11n mailbox srfi-18 synch miscmacros moremacros condition-utils check-errors llrb-tree

test

Bugs and Limitations

Author

Kon Lovett

Version history

1.0.4
Use llrb-tree.
1.0.3
Add remote-mailbox-service.
1.0.2
Add remote-mailbox-default-expected-size.
1.0.1
Clarify types.
1.0.0
Initial Chicken 5 release.

License

Copyright (C) 2009-2021 Kon Lovett. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the Software), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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