44 lines
1.0 KiB
Go
44 lines
1.0 KiB
Go
//
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// Binary Star server, using bstar reactor.
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//
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package main
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import (
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zmq "github.com/pebbe/zmq4"
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"github.com/pebbe/zmq4/examples/bstar"
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"fmt"
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"os"
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)
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// Echo service
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func echo(socket *zmq.Socket) (err error) {
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msg, err := socket.RecvMessage(0)
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if err != nil {
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return
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}
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_, err = socket.SendMessage(msg)
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return
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}
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func main() {
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// Arguments can be either of:
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// -p primary server, at tcp://localhost:5001
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// -b backup server, at tcp://localhost:5002
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var bst *bstar.Bstar
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if len(os.Args) == 2 && os.Args[1] == "-p" {
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fmt.Println("I: Primary active, waiting for backup (passive)")
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bst, _ = bstar.New(bstar.PRIMARY, "tcp://*:5003", "tcp://localhost:5004")
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bst.Voter("tcp://*:5001", zmq.ROUTER, echo)
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} else if len(os.Args) == 2 && os.Args[1] == "-b" {
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fmt.Println("I: Backup passive, waiting for primary (active)")
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bst, _ = bstar.New(bstar.BACKUP, "tcp://*:5004", "tcp://localhost:5003")
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bst.Voter("tcp://*:5002", zmq.ROUTER, echo)
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} else {
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fmt.Println("Usage: bstarsrvs { -p | -b }")
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return
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}
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bst.Start()
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}
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