通过bash运行多个Java应用程序实例，如何访问它们的shell菜单?

So I got the job of testing the new java engine. The programmer who created it made me a test jar file so I can test some crashmoments and loadbalancing.

所以我得到了测试新的java引擎的工作。创建它的程序员为我创建了一个测试jar文件，这样我就可以测试一些突发事件和负载平衡。

I know it's a load of text here, but I hope someone can give me a great answer! Thanks in advance for reading!

我知道这里有很多文章，但我希望有人能给我一个很好的答案!提前感谢您的阅读!

I wanted to automate the testing process so I created a bash file.

我想自动化测试过程，所以我创建了一个bash文件。

So far what it does is loop for a couple of times, in which it starts the jar file:

到目前为止，它所做的是多次循环，其中它启动jar文件:

java -jar /mnt/nas/i/testsail/clusteng.jar 2>> /dev/null &

After that it gets the processId of the just started java app:

之后，它获得了刚刚启动的java应用程序的进程:

process_ids[$i]=$!

So eventually I have like 5 instances of that jar, all with their related processId.

最后我有5个jar实例，都有相关的过程。

Now my problem is, the programmer added a little shell around the app, in which I can tell it at what moment to crash. If I just start the engine from the commandline, it shows me that shell and I can just type 'fail moment_Of_Faillure' and it will ungracefully fail there.

现在我的问题是，程序员在应用程序周围添加了一个小shell，在这个shell中，我可以告诉它什么时候崩溃。如果我从命令行启动引擎，它会显示shell和我可以键入“fail moment_Of_Faillure”，它会在那里失败。

Ofcourse now I want to give each instance another failmoment, and I want to randomize that from the bash script.

当然，现在我想给每个实例另一个失败时刻，我想从bash脚本中随机化它。

My question is; How can I give commands to each instance from within the bash script?

我的问题是;如何从bash脚本中向每个实例发出命令?

I will post the complete bash script here:

我将在这里发布完整的bash脚本:

#!/bin/bash
# Engine testing script; Starts multiple engine instances and shoots one every 20 seconds
clear
echo "#####################"
echo "# Start $1 processes #"
echo "#####################"
echo ""

# create number of processes
for ((  i = 1 ;  i <= $1;  i++  ))
do
    if test $i == 1
    then
        echo "Starting process: $i -> Master Process"
    else
        echo "Starting process: $i"
    fi

    #$! = last started process
    java -jar /mnt/nas/i/testsail/clusteng.jar 2>> /dev/null &
    process_ids[$i]=$!
    echo "PID $!"
    echo ""

    sleep 20
done

sleep 20

for ((  i = 1 ;  i <= $1;  i++  ))
do
    echo "Kill PID:${process_ids[$i]}"
    #ech `FAIL BEFORE_RANK_DISTRIBUTION` > fifo$i
    kill -9 ${process_ids[$i]}
    echo ""
    if test $i != $1
    then
       sleep 20
    fi
done

# run errorcheck
. `./checklogs`

1 个解决方案

#1

You could use named pipes (fifos) to send commands to the backgrounded processes.

您可以使用命名管道(fifos)向后台进程发送命令。

For some hints and advice see here:

这里有一些提示和建议:

Send command to a background process

向后台进程发送命令

#1