mirror of https://github.com/tidwall/tile38.git
82 lines
1.4 KiB
Go
82 lines
1.4 KiB
Go
package endpoint
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import (
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"fmt"
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"sync"
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"time"
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"github.com/gomodule/redigo/redis"
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)
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const redisExpiresAfter = time.Second * 30
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// RedisConn is an endpoint connection
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type RedisConn struct {
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mu sync.Mutex
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ep Endpoint
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ex bool
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t time.Time
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conn redis.Conn
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}
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func newRedisConn(ep Endpoint) *RedisConn {
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return &RedisConn{
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ep: ep,
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t: time.Now(),
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}
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}
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// Expired returns true if the connection has expired
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func (conn *RedisConn) Expired() bool {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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if !conn.ex {
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if time.Since(conn.t) > redisExpiresAfter {
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conn.close()
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conn.ex = true
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}
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}
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return conn.ex
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}
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// ExpireNow forces the connection to expire
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func (conn *RedisConn) ExpireNow() {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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conn.close()
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conn.ex = true
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}
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func (conn *RedisConn) close() {
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if conn.conn != nil {
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conn.conn.Close()
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conn.conn = nil
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}
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}
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// Send sends a message
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func (conn *RedisConn) Send(msg string) error {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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if conn.ex {
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return errExpired
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}
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conn.t = time.Now()
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if conn.conn == nil {
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addr := fmt.Sprintf("%s:%d", conn.ep.Redis.Host, conn.ep.Redis.Port)
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var err error
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conn.conn, err = redis.Dial("tcp", addr)
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if err != nil {
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conn.close()
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return err
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}
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}
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_, err := redis.Int(conn.conn.Do("PUBLISH", conn.ep.Redis.Channel, msg))
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if err != nil {
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conn.close()
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return err
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}
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return nil
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}
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