1IO::Async::Protocol(3)User Contributed Perl DocumentationIO::Async::Protocol(3)
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NAME

6       "IO::Async::Protocol" - base class for transport-based protocols
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DESCRIPTION

9       This subclass of IO::Async:Notifier provides storage for a
10       IO::Async::Handle object, to act as a transport for some protocol. It
11       contains an instance of the transport object, which it adds as a child
12       notifier, allowing a level of independence from the actual transport
13       being used. For example, a stream may actually be an
14       IO::Async::SSLStream to allow the protocol to be used over SSL.
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16       This class is not intended to be used directly, instead, see one of the
17       subclasses
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19       IO::Async::Protocol::Stream - base class for stream-based protocols
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EVENTS

22       The following events are invoked, either using subclass methods or CODE
23       references in parameters:
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25   on_closed
26       Optional. Invoked when the transport handle becomes closed.
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PARAMETERS

29       The following named parameters may be passed to "new" or "configure":
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31   transport => IO::Async::Handle
32       The IO::Async::Handle to delegate communications to.
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34   on_closed => CODE
35       CODE reference for the "on_closed" event.
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37       When a new "transport" object is given, it will be configured by
38       calling the "setup_transport" method, then added as a child notifier.
39       If a different transport object was already configured, this will first
40       be removed and deconfigured using the "teardown_transport".
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METHODS

43   transport
44          $transport = $protocol->transport
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46       Returns the stored transport object
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48   connect
49          $protocol->connect( %args )
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51       Sets up a connection to a peer, and configures the underlying
52       "transport" for the Protocol.
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54       Takes the following named arguments:
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56       socktype => STRING or INT
57               Required. Identifies the socket type, and the type of
58               continuation that will be used. If this value is "stream" or
59               "SOCK_STREAM" then "on_stream" continuation will be used;
60               otherwise "on_socket" will be used.
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62       on_connected => CODE
63               Optional. If supplied, will be invoked once the connection has
64               been established.
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66                $on_connected->( $protocol )
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68       transport => IO::Async::Handle
69               Optional. If this is provided, it will immediately be
70               configured as the transport (by calling "configure"), and the
71               "on_connected" callback will be invoked. This is provided as a
72               convenient shortcut.
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74       Other arguments will be passed to the underlying IO::Async::Loop
75       "connect" call.
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TRANSPORT DELEGATION

78       The following methods are delegated to the transport object
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80        close
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SUBCLASS METHODS

83       "IO::Async::Protocol" is a base class provided so that specific
84       subclasses of it provide more specific behaviour. The base class
85       provides a number of methods that subclasses may wish to override.
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87       If a subclass implements any of these, be sure to invoke the superclass
88       method at some point within the code.
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90   setup_transport
91          $protocol->setup_transport( $transport )
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93       Called by "configure" when a new "transport" object is given, this
94       method should perform whatever setup is required to wire the new
95       transport object into the protocol object; typically by setting up
96       event handlers.
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98   teardown_transport
99          $protocol->teardown_transport( $transport )
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101       The reverse of "setup_transport"; called by "configure" when a
102       previously set-up transport object is about to be replaced.
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AUTHOR

105       Paul Evans <leonerd@leonerd.org.uk>
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109perl v5.30.0                      2019-07-26            IO::Async::Protocol(3)