I have a program in java which takes 0'th aargument as file location like
File f = new File(args[0]);
so when i execute it using a windows batch(.bat) file it works correctly .
but when i execute the same using a linux shell file(.sh) in linux i get ArrayIndexOutOfBoundsException.
WINDOWS BATCH FILE :
#echo off
for /f %%i in ("%0") do set scriptpath=%%~dpi
set cp=%scriptpath%/../lib/*.jar;
java -classpath %cp% com.synchronizer.main.MYSynchronizer %scriptpath% "%1" "%2"
LINUX SH FILE:
export JAVA_HOME=/usr/local/java
PATH=/usr/local/java/bin:${PATH}
THE_CLASSPATH=
for i in `ls ../lib/*.jar`
do
THE_CLASSPATH=${THE_CLASSPATH}:${i}
done
java -cp ".:${THE_CLASSPATH}" \
com.synchronizer.main.MYSynchronizer
please help!
It looks like a problem in script (no arguments are passed to the Java program).
You can consider to debug the script like this: debugging scripts
Hope this helps
Your shell script is not passing any parameters:
java -cp ".:${THE_CLASSPATH}" com.synchronizer.main.MYSynchronizer
Try:
java -cp ".:${THE_CLASSPATH}" com.synchronizer.main.MYSynchronizer "$1" "$2"
As stated above, your Linux shell script is not sending any arguments to the Java program that you are trying to start.
And, adding to that, you are not showing us how you run the Linux shell script. If no argument is given on the command line when you start the shell script, no arguments can be passed to your Java application from the shell script.
If you want to see the actual command that is going to be run by your shell script, you can always put "echo" in front of a line and see what all variables are expanded to. This is a simple way to debug shell scripts.
Related
I want to execute a jar file of DOMO CLI from a shell script. The jar file itself has some functions which I want to call after I call the main jar file. The problem which I am facing is that after it executes the jar file, I am not able to pass the additional commands to execute inside that jar through a shell script. It just stops after calling jar and doesn't take further commands. Can anyone please help? Below is the code I am calling from a shell script.
java -jar XX.jar
The commands are as below which follow the above jar. So once we enter into the above jar we have to execute the below commands one after the other. I am not sure how to achieve this through a shell script.
connect -s X.domo.com -t Ysssss
upload-dataset -a -i dhdhdhdh -f /prehdfs/dev/comres/herm/data/yyyy.csv
Did you try using pipes and inputs.
When you execute above it runs it under a child shell.
You may try below format if not tried already
$ (echo "connect -s X.domo.com -t Ysssss" && cat) | java -jar XX.jar
If you can reference a file in your use case, you could put your commands in a file.
File: list_my_datasets.domo
connect -t ... -s ...
list-dataset
quit
then run the command:
java -jar domoUtil.jar -script list_my_datasets.domo > datasets
I wanted the data from it so I piped to a file (where I had to grep what I wanted), but you would omit that I believe, unless it has some output you'd want to check. I haven't tested with the upload command, but I would hope any commands substituted or added to the example work similarly.
Domo docs on scripting
java -jar /home/scripts/relay.jar is working fine when I launch from command line. The command produces a file: relay.txt
In crontab
/usr/bin/java -jar /home/oneprovider/relay.jar
is not producing anything. I first had it without /usr/bin/ but then did which java and added absolute path with no luck. The jar file was originally written for windows but it works in Linux fine when launched from command line
What am I missing?
Agreed that the working directory is likely the problem. Can you write a shell script that wraps the java invocation and sets the working directory? Something like:
#!/bin/sh -e
cd /home/oneprovider
/usr/bin/java -jar /home/oneprovider/relay.jar
Then change the cron job to run the script instead. Remember to chmod it and make sure that the cron user can write to the directory if it isn't your personal crontab.
I have the following script which won't work when executed as a script, but does work when the exact same commands are entered into the terminal:
#! /bin/sh
cd ~/Desktop/Example/
javac Generator.java
The error message is:
my_script.sh 3: my_script.sh: javac: not found
The above script is named my_script.sh and I execute it from the terminal using:
sh my_script.sh
when I do
echo $SHELL
in the terminal I get:
/bin/bash
Add jmlc to your path and run the script again.
To check: Open a new shell and type 'jmc'.
Another way to get your script working is to specify the full path in your script. Replace 'jmlc' with '/full_path_here/jmlc'.
Also make sure that any other commands in jmlc script are also available in the path.
You can also made jmlc available by exporting its PATH:
#! /bin/sh
export jmlc_bin=FULL_PATH_TO_JMLC
cd ~/Desktop/Example/
$jmlc_bin Generator.java
Navigate to the directory where your single line commands were working and save your script in that directory.
then execute
./my_script.sh
I used a shell script to run a Java class.
My script contains
#!/bin/sh
java -jar jobs/job.jar
These are my failed attempts to run it.
[root#]#sh testapp.sh
Unable to access jarfile jobs/job.jar
if I just do this at the command line it works fine
[root#]#java -jar jobs/job.jar
thanks.
The best way is to get the current dirname and get in there with this:
#!/bin/sh
cd `dirname "$0"`
java -jar ./job/job.jar
Use the absolute path to your JAR file, e. g. /root/jobs/job.jar.
-java -classpath<> <classname> in the ".bat" file to launch java test from cmd windows
how to do that using perl to launch java test from linux ?
Don't use perl. For such a simple job, a simple shell script will do:
#!/bin/sh
/path/to/java -classpath foo.jar:bar.jar:. classname
Make the file executable with chmod +x filename and execute it with ./filename
A similar approach using the -jar option is possible. Additionally, you can forward any command line parameters using the special parameter #.
#!/bin/sh
/path/to/java -jar foo.jar "${#}"