在同一台物理计算机上连接两个Java进程的最快方法是什么？

Question

I have a large in-memory cache inside my Java application, which is being filled after application starts. It's makes redeployments extremelly expensive and slowers development process.

To solve the problem I'd like to outsource the cache to a separate Java process. What is the fastest way to connect two Java processes on Linux?

Answer 1

As a fastest solution I'd recommend you to use Hazelcast . They support distributed maps. You can define simple, 2 nodes cluster, so when both your processes are up the date will be shared, when one of them is going down the data will be still in the memory of dedicated process, when the main process is up again the data will be shared again.

The only thing that you have to change in your code is the line where you create instance of your map. You have to use the Hazelcast API instead of new HashMap<>() .