92 lines
1.6 KiB
Go
92 lines
1.6 KiB
Go
package client
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import (
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"sync"
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"time"
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"github.com/micro/go-micro/transport"
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)
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type pool struct {
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tr transport.Transport
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sync.Mutex
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conns map[string][]*poolConn
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}
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type poolConn struct {
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transport.Client
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created int64
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}
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var (
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// only hold on to this many conns
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maxIdleConn = 2
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// only hold on to the conn for this period
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maxLifeTime = int64(60)
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)
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func newPool() *pool {
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return &pool{
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conns: make(map[string][]*poolConn),
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}
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}
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// NoOp the Close since we manage it
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func (p *poolConn) Close() error {
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return nil
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}
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func (p *pool) getConn(addr string, tr transport.Transport, opts ...transport.DialOption) (*poolConn, error) {
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p.Lock()
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conns := p.conns[addr]
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now := time.Now().Unix()
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// while we have conns check age and then return one
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// otherwise we'll create a new conn
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for len(conns) > 0 {
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conn := conns[len(conns)-1]
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conns = conns[:len(conns)-1]
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p.conns[addr] = conns
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// if conn is old kill it and move on
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if d := now - conn.created; d > maxLifeTime {
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conn.Client.Close()
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continue
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}
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// we got a good conn, lets unlock and return it
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p.Unlock()
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return conn, nil
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}
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p.Unlock()
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// create new conn
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c, err := tr.Dial(addr, opts...)
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if err != nil {
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return nil, err
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}
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return &poolConn{c, time.Now().Unix()}, nil
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}
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func (p *pool) release(addr string, conn *poolConn, err error) {
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// don't store the conn if it has errored
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if err != nil {
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conn.Client.Close()
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return
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}
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// otherwise put it back for reuse
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p.Lock()
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conns := p.conns[addr]
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if len(conns) >= maxIdleConn {
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p.Unlock()
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conn.Client.Close()
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return
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}
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p.conns[addr] = append(conns, conn)
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p.Unlock()
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}
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