78 lines
3.4 KiB
Ada
78 lines
3.4 KiB
Ada
-------------------------------------------------------------------------------
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-- Copyright (C) 2020-2030, per.s.sandberg@bahnhof.se --
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-- --
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-- Permission is hereby granted, free of charge, to any person obtaining a --
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-- copy of this software and associated documentation files --
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-- (the "Software"), to deal in the Software without restriction, including --
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-- without limitation the rights to use, copy, modify, merge, publish, --
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-- distribute, sublicense, and / or sell copies of the Software, and to --
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-- permit persons to whom the Software is furnished to do so, subject to --
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-- the following conditions : --
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-- --
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-- The above copyright notice and this permission notice shall be included --
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-- in all copies or substantial portions of the Software. --
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-- --
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-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
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-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
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-- MERCHANTABILITY, --
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-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL --
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-- THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR --
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-- OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, --
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-- ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR --
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-- OTHER DEALINGS IN THE SOFTWARE. --
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-------------------------------------------------------------------------------
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with ZMQ.Sockets;
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with ZMQ.Contexts;
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with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
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with ZMQ.Proxys;
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procedure ZMQ.Examples.Multi_Thread_Server is
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task type Server_Task (Ctx : not null access ZMQ.Contexts.Context;
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Id : Integer) is
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end Server_Task;
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type Server_Task_Access is access all Server_Task;
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task body Server_Task is
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Msg : Ada.Strings.Unbounded.Unbounded_String;
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S : ZMQ.Sockets.Socket;
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begin
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S.Initialize (Ctx.all, Sockets.REP);
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S.Connect ("inproc://workers");
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loop
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Msg := S.Recv;
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Append (Msg, "<Served by thread:" & Id'Img & ">");
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S.Send (Msg);
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end loop;
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end Server_Task;
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Ctx : aliased ZMQ.Contexts.Context;
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Number_Of_Servers : constant := 10;
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Servers : array (1 .. Number_Of_Servers) of Server_Task_Access;
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Workers : aliased ZMQ.Sockets.Socket;
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Clients : aliased ZMQ.Sockets.Socket;
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begin
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-- Initialise 0MQ context, requesting a single application thread
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-- and a single I/O thread
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Ctx.Set_Number_Of_IO_Threads (Servers'Length + 1);
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-- Create a ZMQ_REP socket to receive requests and send replies
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Workers.Initialize (Ctx, Sockets.ROUTER);
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Workers.Bind ("tcp://lo:5555");
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-- Bind to the TCP transport and port 5555 on the 'lo' interface
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Clients.Initialize (Ctx, Sockets.DEALER);
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Clients.Bind ("inproc://workers");
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for I in Servers'Range loop
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Servers (I) := new Server_Task (Ctx'Access, I);
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end loop;
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ZMQ.Proxys.Proxy (Frontend => Clients'Access,
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Backend => Workers'Access);
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end ZMQ.Examples.Multi_Thread_Server;
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