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90 lines
1.9 KiB
90 lines
1.9 KiB
// Copyright 2012-2015 Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"fmt"
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"sync"
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"time"
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)
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// conn represents a single connection to a node in a cluster.
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type conn struct {
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sync.RWMutex
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nodeID string // node ID
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url string
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failures int
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dead bool
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deadSince *time.Time
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}
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// newConn creates a new connection to the given URL.
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func newConn(nodeID, url string) *conn {
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c := &conn{
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nodeID: nodeID,
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url: url,
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}
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return c
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}
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// String returns a representation of the connection status.
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func (c *conn) String() string {
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c.RLock()
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defer c.RUnlock()
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return fmt.Sprintf("%s [dead=%v,failures=%d,deadSince=%v]", c.url, c.dead, c.failures, c.deadSince)
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}
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// NodeID returns the ID of the node of this connection.
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func (c *conn) NodeID() string {
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c.RLock()
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defer c.RUnlock()
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return c.nodeID
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}
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// URL returns the URL of this connection.
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func (c *conn) URL() string {
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c.RLock()
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defer c.RUnlock()
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return c.url
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}
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// IsDead returns true if this connection is marked as dead, i.e. a previous
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// request to the URL has been unsuccessful.
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func (c *conn) IsDead() bool {
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c.RLock()
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defer c.RUnlock()
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return c.dead
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}
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// MarkAsDead marks this connection as dead, increments the failures
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// counter and stores the current time in dead since.
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func (c *conn) MarkAsDead() {
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c.Lock()
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c.dead = true
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if c.deadSince == nil {
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utcNow := time.Now().UTC()
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c.deadSince = &utcNow
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}
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c.failures += 1
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c.Unlock()
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}
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// MarkAsAlive marks this connection as eligible to be returned from the
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// pool of connections by the selector.
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func (c *conn) MarkAsAlive() {
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c.Lock()
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c.dead = false
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c.Unlock()
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}
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// MarkAsHealthy marks this connection as healthy, i.e. a request has been
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// successfully performed with it.
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func (c *conn) MarkAsHealthy() {
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c.Lock()
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c.dead = false
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c.deadSince = nil
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c.failures = 0
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c.Unlock()
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}
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