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VMS::ICC 0.02

Company: Dan Sugalski
Date Added: November 25, 2013  |  Visits: 180

VMS::ICC

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VMS::ICC is a Perl module that provides an interface into the IntraCluster Communication services.<br /><br />new_service<br /><br /> Registers a service in the cluster. The service_name, logical_name and logical_table parameters are all optional--if you leave one or more out, or pass them as undef, VMS::ICC will use the default values.<br /><br /> Since connection accepts are done in AST routines, and there's no good way to register a perl AST routine, VMS::ICC automatically accepts any connection request and puts it on an internal queue. The queue is currently limited to 25 entries, and any connection requests made while the queue is full will be refused. (Calling accept_connection from perl takes a connect request off the internal queue, opening up a slot for another inbound connection)<br /><br /> This returns a scalar that represents this particular service, though at the moment the scalar is unused and a program can only have one open service at a time.<br /><br />accept_connection<br /><br /> Accepts a connection and returns a handle to it, or undef if there aren't any pending connections. The service_handle parameter is the same as what's returned by new_service, though it's currently ignored.<br /><br />open_connection<br /><br /> Opens a connection to a server out there someplace. Makes the connection to the service you specified, optionally on the node you specified. (If no node parameter is passed, the ICC services choose from amongst all the services registered with that name in the cluster)<br /><br />read_data<br /><br /> Reads a message from the specified connection. This will block waiting for a message to arrive on the specified connection.<br /><br /> Currently messages are limited to a maximum of 1000 bytes.<br /><br />write_data<br /><br /> Writes data to the specified connection. The data scalar is converted to a string (if it isn't already one) and sent to the other end. If the async flag is set this will return immediately, otherwise it blocks until the message is read on the other end.<br /><br />close_connection<br /><br /> Closes the specified connection.<br /><br />delete_service<br /><br /> Deregisters the service and closes any pending accepted but unprocessed connections.<br /><br />debug<br /><br /> Turns on all sorts of debugging logic. This takes an integer. Bit 0 turns on tracing, bit 1 turns on system service status messages, and bit 2 turns on generall chatty stuff.<br /><br />SYNOPSIS<br /><br /> use VMS::ICC;<br /> $service_handle = new_service($service_name, $logical_name, $logical_table);<br /> $connection_handle = accept_connection($service_handle);<br /> $connection_handle = open_connection($service, $node);<br /> $data = read_data($connection_handle);<br /> $status = write_data($connection_handle, $data, $async);<br /> $status = close_connection($connection_handle);<br /> $status = delete_service($service_handle);<br /> $old_debug = VMS::ICC::debug($new_level);

Requirements: No special requirements
Platforms: *nix, Linux
Keyword: Accepts Connection Icc Internal Limited Message Parameter Pending Queue Request Scalar Service Service Handle Status Turns Undef Vms Vms Icc Vmsicc
Users rating: 0/10

License: Freeware Size: 10.24 KB
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