节点js中的Redlock错误

Question

我试图使用红锁模块，但我面临一个错误，我无法通过。

以下是我的redlock文件的样子：

var redis = require('redis');
var Redlock = require('redlock');
var logger = require('./logger.js');

var client;

module.exports.redisConnection = function(port,host){
    client = redis.createClient(port,host);

    client.on('connect',function(){
        logger.info("Redis default connection open to "+host+":"+port);
    });

    client.on('error',function(err){
        logger.info("Redis default connection error "+err);
        logger.info("Redis Path : "+host+":"+port);
    });

    process.on('SIGINT', function() {  
        client.quit();      
        logger.info("Redis default connection disconnected");
        process.exit(0);
    }); 
};

var redlock = new Redlock(
    [client],
    {
        driftFactor : 0.01,
        retryCount : 15,
        retryDelay : 200
    }
);

redlock.on('clientError', function(err) {
    logger.info("A Redis Error Has Occurred : "+err);
});

module.exports.lockRessource = function(ressource_id,callback){
    redlock.lock(ressource_id,2000,function(err,lock){
        if(err){
            callback(err,null);
        }
        else{
            callback(null,lock);
        }
    });
};

module.exports.unlockLock = function(lock,callback){

    lock.unlock(function(err){
        if(err){
            callback(true,null);
        }
        else{
            callback(null,true);
        }
    }); 
};

当我尝试从另一个模块调用lockRessource函数时，会得到一个错误：

2016-04-14T16:28:55.020 - info: /usr/app/node_modules/redlock/redlock.js:314:12 at /usr/app/node_modules/redlock/redlock.js:314:12 at Array.forEach : TypeError:无法读取未定义属性“set”(原生)在/usr/app/node_ (/usr/app/node_modules/redlock/redlock.js:313:24) /redlock/redlock.js处进行尝试。：:318:10 :10 (/usr/app/node_modules/redlock/node_modules/bluebird/js/release/debuggability.js:272:9) at Promise._resolveFromExecutor (/usr/app/node_modules/redlock/node_modules/bluebird/js/release/promise.js:474:18) at new Promise (/usr/app/node_modules/redlock/node_modules/bluebird/js/release/promise.js:77:14) at Redlock._lock(/usr/app/node_modules/redlock/redlock.js:249:9) at Redlock.lock (/usr/app/node_modules/redlock/redlock.js:111:14) at Object.module.exports.lockRessource (/usr/app/redisdata.js:42:10)

你知道这是从哪里来的吗？好像我对这个模块没做什么疯狂的事。

非常感谢！

Answer 1

在客户端被分配后，Init红锁。

您的redlock文件看起来如下：

var redis = require('redis');
var Redlock = require('redlock');
var logger = require('./logger.js');

var client;
var redlock;

module.exports.redisConnection = function(port,host){
    client = redis.createClient(port,host);
    redlock = new Redlock(
        [client],
        {
            driftFactor : 0.01,
            retryCount : 15,
            retryDelay : 200
        }
    );

    client.on('connect',function(){
        logger.info("Redis default connection open to "+host+":"+port);
    });

    client.on('error',function(err){
        logger.info("Redis default connection error "+err);
        logger.info("Redis Path : "+host+":"+port);
    });

    redlock.on('clientError', function(err) {
        logger.info("A Redis Error Has Occurred : "+err);
    });

    process.on('SIGINT', function() {
        client.quit();
        logger.info("Redis default connection disconnected");
        process.exit(0);
    });
};

module.exports.lockRessource = function(ressource_id,callback){
    redlock.lock(ressource_id,2000,function(err,lock){
        if(err){
            callback(err,null);
        }
        else{
            callback(null,lock);
        }
    });
};

module.exports.unlockLock = function(lock,callback){

    lock.unlock(function(err){
        if(err){
            callback(true,null);
        }
        else{
            callback(null,true);
        }
    });
};

当您想要使用该模块时，首先调用redisConnection。

假设上面文件的名称是"redlock.js“。

resource = require('./redlock.js')

resource.redisConnection(6379, "127.0.0.1")
resource.lockRessource("your resourceId", function(err, lock) { })