php安装 zookeeper扩展的方法:首先下载zookeeper;然后指定一下安装目录;最后通过“make && make install”安装zookeeper即可。
本文操作环境:Windows7系统、PHP7.1、Dell G3电脑。
ZooKeeper是一个分布式的,开放源码的分布式应用程序协调服务,是Google的Chubby一个开源的实现,是Hadoop和Hbase的重要组件。它是一个为分布式应用提供一致性服务的软件,提供的功能包括:配置维护、域名服务、分布式同步、组服务等。
ZooKeeper的目标就是封装好复杂易出错的关键服务,将简单易用的接口和性能高效、功能稳定的系统提供给用户。
要在php中使用zookeeper,先要安装php zookeeper扩展,要安装php zookeeper扩展,得先安装zookeeper
1、安装zookeeper
在这里面下载最新版的稳定版
http://mirror.bit.edu.cn/apache/zookeeper/stable/
cd /download
wget http://mirror.bit.edu.cn/apache/zookeeper/stable/zookeeper-3.4.12.tar.gz //这个是已经安装好的工具,下面我们还需要自己编译安装一下,因为后面安装php的扩展时用得到
tar -zxvf zookeeper-3.4.12.tar.gz
cd zookeeper-3.4.12/src/c/
./configure --prefix=/usr/local/zookeeper //指定一下安装目录
make && make install
就这样安装完了
2、安装php zookeeper的扩展 在 http://pecl.php.net/package/zookeeper中找
cd /download
wget http://pecl.php.net/get/zookeeper-0.6.2.tgz
tar -zxvf zookeeper-0.6.2.tgz
cd zookeeper-0.6.2
./configure --with-libzookeeper-dir=/usr/local/zookeeper //要指定依赖
make && make install
配置php.ini
extension="/usr/local/Cellar/php/7.2.6/pecl/20170718/zookeeper.so"
重启php-fpm即可。
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3、启动zookeeper前要安装jdk 已经安装的可以忽略
在http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html里面下载
然后傻瓜式安装,这里不说了
4、启动zookeeper
cd /download/zookeeper-3.4.12/bin
./zkServer.sh start
./zkCli.sh -server 127.0.0.1:2181
cli方式开启
注意:
如果报错:
cd ../conf
cp zoo_sample.cfg zoo.cfg
复制一下文件
5、php代码测试
测试代码
<?php /** * */ class zookeeperDemo { private $zookeeper; function __construct($address) { $this->zookeeper = new Zookeeper($address); } /* * get */ public function get($path) { if (!$this->zookeeper->exists($path)) { return null; } return $this->zookeeper->get($path); } public function getChildren($path) { if (strlen($path) > 1 && preg_match('@/$@', $path)) { // remove trailing / $path = substr($path, 0, -1); } return $this->zookeeper->getChildren($path); } /* * set 值 * * */ public function set($path, $value) { if (!$this->zookeeper->exists($path)) { //创建节点 $this->makePath($path); } else { $this->zookeeper->set($path,$value); } } /* * 创建路径 */ private function makePath($path, $value='') { $parts = explode('/', $path); $parts = array_filter($parts);//过滤空值 $subPath = ''; while (count($parts) > 1) { $subPath .= '/' . array_shift($parts);//数组第一个元素弹出数组 if (!$this->zookeeper->exists($subpath)) { $this->makeNode($subPath, $value); } } } /* * 创建节点 * */ private function makeNode($path, $value, array $params = array()) { if (empty($params)) { $params = [ [ 'perms' => Zookeeper::PERM_ALL, 'scheme' => 'world', 'id' => 'anyone' ] ]; } return $this->zookeeper->create($path, $value, $params); } /* * 删除 **/ public function deleteNode($path) { if (!$this->zookeeper->exists($path)) { return null; } else { return $this->zookeeper->delete($path); } } } $zk = new zookeeperDemo('localhost:2181'); //var_dump($zk->get('/zookeeper')); var_dump($zk->getChildren('/foo')); //var_dump($zk->deleteNode("/foo")); ?> 测试代码2、 <?php /** * PHP Zookeeper * * PHP Version 5.3 * * The PHP License, version 3.01 * * @category Libraries * @package PHP-Zookeeper * @author Lorenzo Alberton <l.alberton@quipo.it> * @copyright 2012 PHP Group * @license http://www.php.net/license The PHP License, version 3.01 * @link https://github.com/andreiz/php-zookeeper */ /** * Example interaction with the PHP Zookeeper extension * * @category Libraries * @package PHP-Zookeeper * @author Lorenzo Alberton <l.alberton@quipo.it> * @copyright 2012 PHP Group * @license http://www.php.net/license The PHP License, version 3.01 * @link https://github.com/andreiz/php-zookeeper */ class Zookeeper_Example { /** * @var Zookeeper */ private $zookeeper; /** * @var Callback container */ private $callback = array(); /** * Constructor * * @param string $address CSV list of host:port values (e.g. "host1:2181,host2:2181") */ public function __construct($address) { $this->zookeeper = new Zookeeper($address); } /** * Set a node to a value. If the node doesn't exist yet, it is created. * Existing values of the node are overwritten * * @param string $path The path to the node * @param mixed $value The new value for the node * * @return mixed previous value if set, or null */ public function set($path, $value) { if (!$this->zookeeper->exists($path)) { $this->makePath($path); $this->makeNode($path, $value); } else { $this->zookeeper->set($path, $value); } } /** * Equivalent of "mkdir -p" on ZooKeeper * * @param string $path The path to the node * @param string $value The value to assign to each new node along the path * * @return bool */ public function makePath($path, $value = '') { $parts = explode('/', $path); $parts = array_filter($parts); $subpath = ''; while (count($parts) > 1) { $subpath .= '/' . array_shift($parts); if (!$this->zookeeper->exists($subpath)) { $this->makeNode($subpath, $value); } } } /** * Create a node on ZooKeeper at the given path * * @param string $path The path to the node * @param string $value The value to assign to the new node * @param array $params Optional parameters for the Zookeeper node. * By default, a public node is created * * @return string the path to the newly created node or null on failure */ public function makeNode($path, $value, array $params = array()) { if (empty($params)) { $params = array( array( 'perms' => Zookeeper::PERM_ALL, 'scheme' => 'world', 'id' => 'anyone', ) ); } return $this->zookeeper->create($path, $value, $params); } /** * Get the value for the node * * @param string $path the path to the node * * @return string|null */ public function get($path) { if (!$this->zookeeper->exists($path)) { return null; } return $this->zookeeper->get($path); } /** * List the children of the given path, i.e. the name of the directories * within the current node, if any * * @param string $path the path to the node * * @return array the subpaths within the given node */ public function getChildren($path) { if (strlen($path) > 1 && preg_match('@/$@', $path)) { // remove trailing / $path = substr($path, 0, -1); } return $this->zookeeper->getChildren($path); } /** * Delete the node if it does not have any children * * @param string $path the path to the node * * @return true if node is deleted else null */ public function deleteNode($path) { if(!$this->zookeeper->exists($path)) { return null; } else { return $this->zookeeper->delete($path); } } /** * Wath a given path * @param string $path the path to node * @param callable $callback callback function * @return string|null */ public function watch($path, $callback) { if (!is_callable($callback)) { return null; } if ($this->zookeeper->exists($path)) { if (!isset($this->callback[$path])) { $this->callback[$path] = array(); } if (!in_array($callback, $this->callback[$path])) { $this->callback[$path][] = $callback; return $this->zookeeper->get($path, array($this, 'watchCallback')); } } } /** * Wath event callback warper * @param int $event_type * @param int $stat * @param string $path * @return the return of the callback or null */ public function watchCallback($event_type, $stat, $path) { if (!isset($this->callback[$path])) { return null; } foreach ($this->callback[$path] as $callback) { $this->zookeeper->get($path, array($this, 'watchCallback')); return call_user_func($callback); } } /** * Delete watch callback on a node, delete all callback when $callback is null * @param string $path * @param callable $callback * @return boolean|NULL */ public function cancelWatch($path, $callback = null) { if (isset($this->callback[$path])) { if (empty($callback)) { unset($this->callback[$path]); $this->zookeeper->get($path); //reset the callback return true; } else { $key = array_search($callback, $this->callback[$path]); if ($key !== false) { unset($this->callback[$path][$key]); return true; } else { return null; } } } else { return null; } } } $zk = new Zookeeper_Example('localhost:2181'); // var_dump($zk->get('/')); // var_dump($zk->getChildren('/')); // var_dump($zk->set('/test', 'abc')); // var_dump($zk->get('/test')); // var_dump($zk->getChildren('/')); // var_dump($zk->set('/foo/001', 'bar1')); // var_dump($zk->set('/foo/002', 'bar2')); // var_dump($zk->get('/')); // var_dump($zk->getChildren('/')); // var_dump($zk->getChildren('/foo')); //watch example 一旦/test节点的值被改变,就会调用一次callback function callback() { echo "in watch callback\n"; } //$zk->set('/test', 1); $ret = $zk->watch('/test', 'callback'); //$zk->set('/test', 2);//在终端执行 while (true) { sleep(1); } /* class ZookeeperDemo extends Zookeeper { public function watcher( $i, $type, $key ) { echo "Insider Watcher\n"; // Watcher gets consumed so we need to set a new one //ZooKeeper提供了可以绑定在znode的监视器。如果监视器发现znode发生变化,该service会立即通知所有相关的客户端。这就是PH//P脚本如何知道变化的。Zookeeper::get方法的第二个参数是回调函数。当触发事件时,监视器会被消费掉,所以我们需要在回调函 //数中再次设置监视器。 $this->get( '/test', array($this, 'watcher' ) ); } } $zoo = new ZookeeperDemo('127.0.0.1:2181'); $zoo->get( '/test', array($zoo, 'watcher' ) ); while( true ) { echo '.'; sleep(2); } */ /* // $zc = new Zookeeper(); // $zc->connect('127.0.0.1:2181'); // var_dump($zc->get('/zookeeper')); // exit; */ ?>
代码参考链接:
https://github.com/php-zookeeper/php-zookeeper/blob/master/examples/Zookeeper_Example.php
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