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Customizable number of replicas when creating an instance of HashRing

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This commit is contained in:
Daniele Alessandri
2009-11-11 12:03:50 +01:00
parent 7dde9ff93c
commit 7c98714a99
1 changed files with 6 additions and 5 deletions
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lib/Predis.php
+6 -5
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@@ -670,17 +670,18 @@ class ConnectionCluster implements IConnection {
namespace Predis\Utilities;
class HashRing {
const NUMBER_OF_REPLICAS = 64;
private $_ring, $_ringKeys;
const DEFAULT_REPLICAS = 64;
private $_ring, $_ringKeys, $_replicas;
public function __construct() {
public function __construct($replicas = self::DEFAULT_REPLICAS) {
$this->_replicas = $replicas;
$this->_ring = array();
$this->_ringKeys = array();
}
public function add($node) {
$nodeHash = (string) $node;
for ($i = 0; $i < self::NUMBER_OF_REPLICAS; $i++) {
for ($i = 0; $i < $this->_replicas; $i++) {
$key = crc32($nodeHash . ':' . $i);
$this->_ring[$key] = $node;
}
@@ -690,7 +691,7 @@ class HashRing {
public function remove($node) {
$nodeHash = (string) $node;
for ($i = 0; $i < self::NUMBER_OF_REPLICAS; $i++) {
for ($i = 0; $i < $this->_replicas; $i++) {
$key = crc32($nodeHash . '_' . $i);
unset($this->_ring[$key]);
$this->_ringKeys = array_filter($this->_ringKeys, function($rk) use($key) {