91 lines
1.9 KiB
Go
91 lines
1.9 KiB
Go
|
// Copyright 2012-present Oliver Eilhard. All rights reserved.
|
||
|
|
// Use of this source code is governed by a MIT-license.
|
||
|
|
// See http://olivere.mit-license.org/license.txt for details.
|
||
|
|
|
||
|
|
package elastic
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"sync"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// conn represents a single connection to a node in a cluster.
|
||
|
|
type conn struct {
|
||
|
|
sync.RWMutex
|
||
|
|
nodeID string // node ID
|
||
|
|
url string
|
||
|
|
failures int
|
||
|
|
dead bool
|
||
|
|
deadSince *time.Time
|
||
|
|
}
|
||
|
|
|
||
|
|
// newConn creates a new connection to the given URL.
|
||
|
|
func newConn(nodeID, url string) *conn {
|
||
|
|
c := &conn{
|
||
|
|
nodeID: nodeID,
|
||
|
|
url: url,
|
||
|
|
}
|
||
|
|
return c
|
||
|
|
}
|
||
|
|
|
||
|
|
// String returns a representation of the connection status.
|
||
|
|
func (c *conn) String() string {
|
||
|
|
c.RLock()
|
||
|
|
defer c.RUnlock()
|
||
|
|
return fmt.Sprintf("%s [dead=%v,failures=%d,deadSince=%v]", c.url, c.dead, c.failures, c.deadSince)
|
||
|
|
}
|
||
|
|
|
||
|
|
// NodeID returns the ID of the node of this connection.
|
||
|
|
func (c *conn) NodeID() string {
|
||
|
|
c.RLock()
|
||
|
|
defer c.RUnlock()
|
||
|
|
return c.nodeID
|
||
|
|
}
|
||
|
|
|
||
|
|
// URL returns the URL of this connection.
|
||
|
|
func (c *conn) URL() string {
|
||
|
|
c.RLock()
|
||
|
|
defer c.RUnlock()
|
||
|
|
return c.url
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsDead returns true if this connection is marked as dead, i.e. a previous
|
||
|
|
// request to the URL has been unsuccessful.
|
||
|
|
func (c *conn) IsDead() bool {
|
||
|
|
c.RLock()
|
||
|
|
defer c.RUnlock()
|
||
|
|
return c.dead
|
||
|
|
}
|
||
|
|
|
||
|
|
// MarkAsDead marks this connection as dead, increments the failures
|
||
|
|
// counter and stores the current time in dead since.
|
||
|
|
func (c *conn) MarkAsDead() {
|
||
|
|
c.Lock()
|
||
|
|
c.dead = true
|
||
|
|
if c.deadSince == nil {
|
||
|
|
utcNow := time.Now().UTC()
|
||
|
|
c.deadSince = &utcNow
|
||
|
|
}
|
||
|
|
c.failures += 1
|
||
|
|
c.Unlock()
|
||
|
|
}
|
||
|
|
|
||
|
|
// MarkAsAlive marks this connection as eligible to be returned from the
|
||
|
|
// pool of connections by the selector.
|
||
|
|
func (c *conn) MarkAsAlive() {
|
||
|
|
c.Lock()
|
||
|
|
c.dead = false
|
||
|
|
c.Unlock()
|
||
|
|
}
|
||
|
|
|
||
|
|
// MarkAsHealthy marks this connection as healthy, i.e. a request has been
|
||
|
|
// successfully performed with it.
|
||
|
|
func (c *conn) MarkAsHealthy() {
|
||
|
|
c.Lock()
|
||
|
|
c.dead = false
|
||
|
|
c.deadSince = nil
|
||
|
|
c.failures = 0
|
||
|
|
c.Unlock()
|
||
|
|
}
|