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分布式Java环境中的资源共享

[英]Resource sharing in a distributed java environment

原文 2016-06-07 14:59:46 7 1 java/ mysql

We have a collection of resources to be distributed to users. 我们有一系列资源可以分发给用户。 Every resource will start in a state <resource_id, READY, timestamp_when_this_resource_expires> 每个资源将以状态<resource_id, READY, timestamp_when_this_resource_expires>

Upon receiving a http request from the user, each web server thread should 收到用户的http请求后，每个Web服务器线程应

find out the resource that is going to expire the soonest, 找出即将过期的资源，
update the state of that resource to <resource_id, IN_USE, timestamp_when_this_resource_expires> 将该资源的状态更新为<resource_id, IN_USE, timestamp_when_this_resource_expires>

I am new to MySQL, I need some help. 我是MySQL的新手，我需要一些帮助。 Two questions 两个问题

How do I make sure two web server threads do not pick same resource and give it to the user . 如何确保两个Web服务器线程不会选择相同的资源并将其提供给用户 。
I believe, I should use a connection pool in my web server. 我相信，我应该在Web服务器中使用连接池。

Our platform: 我们的平台：

Java (and com.sun.net.httpserver.HttpServer ) Java（和com.sun.net.httpserver.HttpServer ）
We have multiple servers running on different machines 我们有多台服务器在不同的机器上运行
our MySQL server is on a different machine. 我们的MySQL服务器在另一台机器上。

1 个解决方案

A connection pool won't work out of the box if you have multiple machines serving up resources. 如果您有多台计算机在提供资源，则连接池将无法立即使用。 You could use a clustered cache such as Redis with Sentinel. 您可以使用群集缓存，例如Redis和Sentinel。 This allows you to have keys with a TTL (Time to Live) and also allows for mutual exclusion. 这使您可以使用带有TTL（生存时间）的键，还可以互斥。