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port.go
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port.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package types
import (
"fmt"
"net"
"strconv"
"strings"
"testing"
"github.com/stretchr/testify/require"
"go.uber.org/yarpc/x/yarpctest/api"
)
// NewPortProvider creates an object that can be used to synchronize ports in
// yarpctest infrastructure. Ports can be acquired through the "Port" function
// which will create new ports for the test based on the id passed into the
// function.
func NewPortProvider(t testing.TB) *PortProvider {
return &PortProvider{
idToPort: make(map[string]*Port),
t: t,
}
}
// PortProvider maintains a list of IDs to Ports.
type PortProvider struct {
idToPort map[string]*Port
t testing.TB
}
// NamedPort will return a *Port object that exists for the passed in 'id', or
// it will create a *Port object if one does not already exist.
func (p *PortProvider) NamedPort(id string) *Port {
port, ok := p.idToPort[id]
if !ok {
port = newPort(p.t)
p.idToPort[id] = port
}
return port
}
func newPort(t testing.TB) *Port {
listener, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:0"))
require.NoError(t, err)
pieces := strings.Split(listener.Addr().String(), ":")
port, err := strconv.ParseInt(pieces[len(pieces)-1], 10, 0)
require.NoError(t, err)
return &Port{
Listener: listener,
Port: uint16(port),
}
}
// Port is an option injectable primitive for synchronizing port numbers between
// requests and services.
type Port struct {
api.NoopLifecycle
Listener net.Listener
Port uint16
}
// ApplyService implements api.ServiceOption.
func (n *Port) ApplyService(opts *api.ServiceOpts) {
opts.Listener = n.Listener
opts.Port = n.Port
}
// ApplyRequest implements api.RequestOption
func (n *Port) ApplyRequest(opts *api.RequestOpts) {
opts.Port = n.Port
}
// ApplyClientStreamRequest implements ClientStreamRequestOption
func (n *Port) ApplyClientStreamRequest(opts *api.ClientStreamRequestOpts) {
opts.Port = n.Port
}