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用 PHP 监听 ZooKeeper

Jun 06, 2016 pm 07:38 PM
g https php zookeeper code monitor

代码出处:https://git.oschina.net/afrxprojs/xgame-code_server ZooKeeper ?php//// 首先, 执行 zkCli.sh 进入 ZooKeeper 命令行工具界面,// 在命令行中可以执行以下操作 ://// 新建 Kev/Value// $ create /xgame 0// $ create /xgame/S00 0// $ create /xg

代码出处:https://git.oschina.net/afrxprojs/xgame-code_server ZooKeeper
<?php
//
// 首先, 执行 zkCli.sh 进入 ZooKeeper 命令行工具界面,
// 在命令行中可以执行以下操作 :
//
// 新建 Kev/Value
// $ create /xgame 0
// $ create /xgame/S00 0
// $ create /xgame/S00/conf/maintenanceTimeStr 0
// $ create /xgame/S00/conf/whiteList 0
// $ create /xgame/S00/conf/blackList 0
//
// 之后执行 PHP 命令启动监听服务 :
//
// $ php ZkServ.php
//
// 注意 : 请事先确认是否已经安装 php-zookeeper 扩展?
// 回到 ZooKeeper 界面, 尝试修改维护时间字符串 :
//
// $ set /xgame/S00/conf/maintenanceTimeStr [20150101000000,20151231235959]
//
// @import
require_once("MyLog.php");
require_once("etc/AppName.php");
require_once("etc/ServerName.php");
require_once("etc/ZooKeeper.php");

/**
 * ZooKeeper 服务
 *
 * @auth jinhaijiang
 * @since 2015/6/28
 * @see https://git.oschina.net/afrxprojs/xgame-code_server
 *
 */
class ZkServ extends Zookeeper {
    /**
     * 应用名称
     *
     * @var String
     *
     */
    public $_appName;

    /**
     * 服务器名称
     *
     * @var String
     *
     */
    public $_serverName;

    /**
     * ZooKeeper 路径字典
     *
     * @var Array
     *
     */
    private $_zkPathMap;

    /**
     * 启动服务
     *
     */
    public function startUp() {
        // 获取应用名称和服务器名称
        $appName = $this->_appName;
        $serverName = $this->_serverName;

        // 初始化路径字典
        $this->_zkPathMap = array(
            "/${appName}/${serverName}/conf/maintenanceTimeStr" => "updateMaintenanceTime",
            "/${appName}/${serverName}/conf/whiteList" => "updateWhiteList",
            "/${appName}/${serverName}/conf/blackList" => "updateBlackList",
        );

        foreach ($this->_zkPathMap as $key => $val) {
            // 输出调试日志
            MyLog::LOG()->debug("准备监听 : $key");
            // 设置监听
            $this->get($key, array($this, "watch"));
        }
    }

    /**
     * 监听数据变化
     *
     * @param $eventType
     * @param $eventState
     * @param $eventKey
     *
     */
    public function watch($eventType, $eventState, $eventKey) {
        // 记录日志信息
        MyLog::LOG()->info("接到数据");
        // 输出调试信息
        MyLog::LOG()->debug("eventType = ${eventType}, eventState = ${eventState}, eventKey = ${eventKey}");

        // 获取数据
        $data = $this->get($eventKey);
        // 获取函数引用并调用
        $funcRef = $this->_zkPathMap[$eventKey];
        $this->$funcRef($data);

        // 循环监听
        $this->get($eventKey, array($this, "watch"));
    }

    /**
     * 更新停服维护时间,
     * 注意这是一个回调函数! 会在 watch 函数中被间接调用
     *
     * @param String $value
     * @return void
     *
     */
    private function updateMaintenanceTime($value) {
        // 记录日志信息
        MyLog::LOG()->info("维护时间 = $value");
        // 获取 JSON 数组
        $jsonArr = json_decode($value);

        $startTimeStr = $jsonArr[0];
        $endTimeStr = $jsonArr[1];

        $text = <<< __EOF
<?php
\$GLOBALS["MAINTENANCE_START_TIME"] = $startTimeStr;
\$GLOBALS["MAINTENANCE_END_TIME"] = $endTimeStr;

__EOF;

        // 目标文件
        $targetFile = dirname(__FILE__) . "/etc/MaintenanceTime.php";
        // 写出目标文件
        self::writeToFile($targetFile, $text);
    }

    /**
     * 更新白名单
     * 注意这是一个回调函数! 会在 watch 函数中被间接调用
     *
     * @param String $value
     * @return void
     *
     */
    private function updateWhiteList($value) {
        // 记录日志信息
        MyLog::LOG()->info("白名单 = ${value}");
        // 获取 JSON 数组
        $jsonArr = json_decode($value);

        $text = <<< __EOF
<?php
\$GLOBALS["WHITE_LIST"] = array(
__EOF;

        foreach ($jsonArr as $json) {
            // 获取平台 UUId
            $platformUUId = $json;
            // 添加到文本
            $text .= "\n\t\"${platformUUId}\" => 1, ";
        }

        $text .= "\n);";

        // 目标文件
        $targetFile = dirname(__FILE__) . "/etc/WhiteList.php";
        // 写出目标文件
        self::writeToFile($targetFile, $text);
    }

    /**
     * 更新黑名单
     * 注意这是一个回调函数! 会在 watch 函数中被间接调用
     *
     * @param String $value
     * @return void
     *
     */
    private function updateBlackList($value) {
        // 记录日志信息
        MyLog::LOG()->info("白名单 = ${value}");
        // 获取 JSON 数组
        $jsonArr = json_decode($value);

        $text = <<< __EOF
<?php
\$GLOBALS["BLACK_LIST"] = array(
__EOF;

        foreach ($jsonArr as $json) {
            // 获取平台 UUId
            $platformUUId = $json;
            // 添加到文本
            $text .= "\n\t\"${platformUUId}\" => 1, ";
        }

        $text .= "\n);";

        // 目标文件
        $targetFile = dirname(__FILE__) . "/etc/BlackList.php";
        // 写出目标文件
        self::writeToFile($targetFile, $text);
    }

    /**
     * 写出目标文件
     *
     * @param $targetFile 目标文件的完整路径
     * @param $text 文本内容
     * @return void
     *
     */
    private static function writeToFile($targetFile, $text) {
        // 打开文件
        $fp = fopen($targetFile, "w");

        if (!$fp) {
            // 如果打开文件失败,
            // 则直接退出!
            MyLog::LOG()->error("打开文件 ${targetFile} 失败!!");
            return;
        }

        // 写出文件内容
        $result = fwrite($fp, $text);

        if (!$result) {
            // 如果写出文件失败,
            // 则记录错误日志
            MyLog::LOG()->error(
                "写出文件 ${targetFile} 失败!!"
            );
        }

        fflush($fp);
        fclose($fp);
    }
}

// 获取服务器名称
$appName = $GLOBALS["APP_NAME"];
$serverName = $GLOBALS["SERVER_NAME"];

// ZooKeeper 配置
$zkHost = $GLOBALS["ZK_SERVER_HOST"];
$zkPort = $GLOBALS["ZK_SERVER_PORT"];

// 创建服务对象
$servObj = new ZkServ("${zkHost}:${zkPort}");
$servObj->_appName = $appName;
$servObj->_serverName = $serverName;
// 启动服务
$servObj->startUp();

while (true) {
    MyLog::LOG()->info("live");
    sleep(60);
}
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