github.com/m3db/m3@v1.5.0/src/x/net/example_test.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package net_test
    22  
    23  import (
    24  	"io"
    25  	"log"
    26  	"net"
    27  
    28  	xnet "github.com/m3db/m3/src/x/net"
    29  	"github.com/m3db/m3/src/x/retry"
    30  )
    31  
    32  func ExampleStartForeverAcceptLoop() {
    33  	// Create a new listener.
    34  	l, err := net.Listen("tcp", ":0")
    35  	if err != nil {
    36  		log.Fatal(err)
    37  	}
    38  	defer l.Close()
    39  
    40  	// Start accepting incoming connections.
    41  	var (
    42  		opts          = retry.NewOptions()
    43  		connCh, errCh = xnet.StartAcceptLoop(l, opts)
    44  	)
    45  
    46  	for {
    47  		select {
    48  		case conn := <-connCh:
    49  			// Handle the connection in a new goroutine.
    50  			go func(c net.Conn) {
    51  				io.Copy(c, c)
    52  				c.Close()
    53  			}(conn)
    54  
    55  		case err := <-errCh:
    56  			// Only fatal errors are returned on errCh.
    57  			log.Fatal(err)
    58  		}
    59  	}
    60  }