Acme

/* Acme Architecture Description Language: Pipe-and-Filter System */
/* Classic example demonstrating Acme's component-connector style */

System PipeAndFilter = {
    Component Source = {
        Ports = {out : Port};
        Properties = {
            functionality : string = "Generates integer data stream";
        }
    }

    Component Transform = {
        Ports = {
            in  : Port;
            out : Port
        };
        Properties = {
            functionality : string = "Squares each input value";
        }
    }

    Component Accumulator = {
        Ports = {
            in  : Port;
            out : Port
        };
        Properties = {
            functionality : string = "Accumulates running total";
        }
    }

    Component Sink = {
        Ports = {in : Port};
        Properties = {
            functionality : string = "Displays final result";
        }
    }

    Connector Pipe1 = {
        Roles = {src : Role; snk : Role};
        Properties = {
            protocol : string = "synchronous-data-flow";
            capacity : int = 1;
        }
    }

    Connector Pipe2 = {
        Roles = {src : Role; snk : Role};
        Properties = {
            protocol : string = "synchronous-data-flow";
            capacity : int = 1;
        }
    }

    Connector Pipe3 = {
        Roles = {src : Role; snk : Role};
        Properties = {
            protocol : string = "synchronous-data-flow";
            capacity : int = 1;
        }
    }

    Attachments = {
        Source.out     to Pipe1.src;
        Pipe1.snk      to Transform.in;
        Transform.out  to Pipe2.src;
        Pipe2.snk      to Accumulator.in;
        Accumulator.out to Pipe3.src;
        Pipe3.snk      to Sink.in;
    }
}