Calling console scripts from java

Question

linux

Greetings!

Interested in the true-way of calling console scripts from Java.

Let's say there is a script that needs to be pulled often. Let's say once a minute multiplied by the number of clients taken from the database, followed by processing of not very large responses received with a delay.

The Runtime.exec() method will create a system process for each call, which seems somewhat intimidating to me if there are about 1000 clients.

How to organize this more competently?

Answer 1

How are you going to run a shell script without starting a new process?
You can write scripts in groove, then you can run them without creating a new process

Answer 2

In unix, starting a new shell script (if it is a shell script) takes a fraction of a second (for more details, say the time command), which is relatively small compared to the frequency of launch. There is nothing wrong with creating a new process.
But if this is a java program, then its initialization time can be significant. It is better not to restart such programs often.
But if you want to touch the basics of Jedi art: make a daemon that will start up, do a fraction of the work and fall asleep for a minute, and your Java code will kick it with a message to the socket once a minute, as well as revive and restart when it freezes / crashes .

Answer 3

In addition to the above. Those. that's right, it's obviously not possible to run a script without running a shell)
Hmm, so spawn one process and twitch it all the time, giving it a script. Or take the script out into the native environment in some way (by a daemon, as mentioned above, or by a scheduler, or something like that).