115 lines
1.9 KiB
Go
115 lines
1.9 KiB
Go
package pool
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import (
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"sync"
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"time"
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"github.com/google/uuid"
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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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size int
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ttl time.Duration
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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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id string
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created time.Time
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}
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func newPool(options Options) *pool {
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return &pool{
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size: options.Size,
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tr: options.Transport,
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ttl: options.TTL,
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conns: make(map[string][]*poolConn),
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}
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}
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func (p *pool) Close() error {
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p.Lock()
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for k, c := range p.conns {
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for _, conn := range c {
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conn.Client.Close()
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}
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delete(p.conns, k)
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}
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p.Unlock()
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return nil
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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 *poolConn) Id() string {
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return p.id
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}
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func (p *poolConn) Created() time.Time {
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return p.created
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}
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func (p *pool) Get(addr string, opts ...transport.DialOption) (Conn, error) {
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p.Lock()
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conns := p.conns[addr]
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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 := time.Since(conn.Created()); d > p.ttl {
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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 := p.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{
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Client: c,
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id: uuid.New().String(),
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created: time.Now(),
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}, nil
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}
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func (p *pool) Release(conn Conn, err error) 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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return conn.(*poolConn).Client.Close()
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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[conn.Remote()]
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if len(conns) >= p.size {
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p.Unlock()
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return conn.(*poolConn).Client.Close()
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}
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p.conns[conn.Remote()] = append(conns, conn.(*poolConn))
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p.Unlock()
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return nil
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}
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