mirror of https://github.com/grpc/grpc-go.git
86 lines
1.6 KiB
Go
86 lines
1.6 KiB
Go
/*
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*
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* Copyright 2019 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package grpclb
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import (
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"net"
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"sync"
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)
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type tempError struct{}
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func (*tempError) Error() string {
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return "grpclb test temporary error"
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}
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func (*tempError) Temporary() bool {
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return true
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}
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type restartableListener struct {
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net.Listener
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addr string
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mu sync.Mutex
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closed bool
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conns []net.Conn
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}
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func newRestartableListener(l net.Listener) *restartableListener {
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return &restartableListener{
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Listener: l,
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addr: l.Addr().String(),
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}
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}
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func (l *restartableListener) Accept() (conn net.Conn, err error) {
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conn, err = l.Listener.Accept()
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if err == nil {
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l.mu.Lock()
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if l.closed {
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conn.Close()
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l.mu.Unlock()
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return nil, &tempError{}
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}
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l.conns = append(l.conns, conn)
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l.mu.Unlock()
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}
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return
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}
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func (l *restartableListener) Close() error {
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return l.Listener.Close()
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}
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func (l *restartableListener) stopPreviousConns() {
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l.mu.Lock()
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l.closed = true
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tmp := l.conns
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l.conns = nil
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l.mu.Unlock()
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for _, conn := range tmp {
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conn.Close()
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}
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}
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func (l *restartableListener) restart() {
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l.mu.Lock()
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l.closed = false
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l.mu.Unlock()
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}
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