我在172.30.56.60,61,62
中运行Hazelcast集群服务器(的即)
[ Member {
address: Address { host: '172.30.56.60', port: 5701, type: 4 },
uuid: 'bd6428f0-e888-453f-872f-6fe8296d751d',
isLiteMember: false,
attributes: {} },
Member {
address: Address { host: '172.30.56.61', port: 5701, type: 4 },
uuid: 'e0cd795a-0ca5-41ab-907a-492b61690a18',
isLiteMember: false,
attributes: {} },
Member {
address: Address { host: '172.30.56.62', port: 5701, type: 4 },
uuid: '0a834ae8-e707-4b5b-945b-362bfea08cf5',
isLiteMember: false,
attributes: {} } ]
我尝试使用 nodejs 使用以下代码实现Hazelcast分布式锁定,
// Initialize the hazelcast client instance.
var HazelcastClient = require('hazelcast-client').Client;
var Config = require('hazelcast-client').Config;
var config = new Config.ClientConfig();
config.networkConfig.addresses = [{host: '172.30.56.60', port: '5701'},{host: '172.30.56.61', port: '5701'}, {host: '172.30.56.62', port: '5701'}];
var lock = {};
var sleep = require('sleep');
HazelcastClient
.newHazelcastClient(config)
.then(function (hazelcastClient) {
lock = hazelcastClient.getLock("lock1");
// do stuff with lock
lock.lock();
console.log('Am locked in node with lock1...will be locked for 20 seconds');
sleep.sleep(20);
console.log('Unlocked now...');
lock.unlock();
process.exit();
});
我逐节点地启动了脚本,我希望按节点建立锁定节点,但是它会同时锁定所有节点。因此它不能作为分布式锁,所以所有脚本都在同一时间开始和结束(注意:对于测试我提供了20秒的睡眠时间)
请告诉我,如何在Hazelcast中使用节点js建立分布式锁。
答案 0 :(得分:0)
我自己找到了答案,我没有意识到承诺的回归,我的不好(对nodejs来说是新的)
// Initialize the hazelcast client instance.
var HazelcastClient = require('hazelcast-client').Client;
var Config = require('hazelcast-client').Config;
var config = new Config.ClientConfig();
config.networkConfig.addresses = [{host: '172.30.56.60', port: '5701'},{host: '172.30.56.61', port: '5701'}, {host: '172.30.56.62', port: '5701'}];
var sleep = require('sleep');
// Test process
HazelcastClient
.newHazelcastClient(config)
.then(function (hazelcastClient) {
var lock = hazelcastClient.getLock('rowId_tablename');
// lock the code here
lock.lock().then(function() {
console.log('Am locked in node with lock3...will be locked for 20 seconds');
sleep.sleep(20);
// unlock after process
return lock.unlock();
}).then(function() {
console.log('unlocked now');
});
});