Pass user defined environment variable to tomcat

Question

I am using the eclipse for web application coding  Within this I passed environment variable like     Project--  Run as --  Run Configuration  And selected Environment tab  Add new environment variable with name APP MASTER PASSWORD and its value    I can access this value in java code as System getenv  APP MASTER PASSWORD     But now I want to pass this environment variable to tomcat and access it in application instead of passing thru eclipse   So how can I pass such variable to tomcat   I googled about it  But I didn t get any solution   Thank you

User · Answer

You should use System property instead of environment variable for this case. Edit your tomcat scripts for JAVA_OPTS and add property like:

-DAPP_MASTER_PASSWORD=foo

and in your code, write

System.getProperty("APP_MASTER_PASSWORD");

You can do this in Eclipse as well, instead of JAVA_OPTS, copy the line in VM parameters inside run configurations.

User · Answer

Environment Entries specified by  lt Environment gt  markup are JNDI  accessible using InitialContext lookup under java  comp env  You can specify environment properties to the JNDI by using the environment parameter to the InitialContext constructor and application resource files   System getEnv   is about system environment variables of the tomcat process itself   To set an environment variable using bash command   export TOMCAT OPTS -Dmy bar foo and start the Tomcat     startup sh To retrieve the value of System property bar use System getProperty    System getEnv   can be used to retrieve the environment variable i e  TOMCAT OPTS

User · Answer

Environment variables can be set  by creating a setenv bat  windows  or setenv sh  unix  file in the bin folder of your tomcat installation directory  However  environment variables will not be accessabile from within your code   System properties are set by -D arguments of the java process  You can define java starting arguments in the environment variable JAVA OPTS   My suggestions is the combination of these two mechanisms  In your apache-tomcat-0 0 0 bin setenv bat write   set JAVA OPTS -DAPP MASTER PASSWORD password1   and in your Java code write   System getProperty  APP MASTER PASSWORD

User · Answer

If you are starting your Tomcat from Eclipse   Servers  view  then you should have a  Run Run Configuration   menu  entry called  Apache Tomcat   Tomcat       When you select this entry in the list of run configurations you get a window with several tabs  one of which is labeled  Environment   There you can configure environment variables for your Tomcat  Be sure to restart Tomcat afterwards

User · Answer

In case of Windows  if you can t find setenv bat  in the 2nd line of catalina bat  after  echo off  add this  SET APP MASTER PASSWORD foo  May not be the best approach  but works

User · Answer

You can use setenv bat or  sh to pass the environment variables to the Tomcat   Create CATALINA BASE bin setenv bat or  sh file and put the following line in it  and then start the Tomcat   On Windows   set APP MASTER PASSWORD foo  On Unix like systems   export APP MASTER PASSWORD foo

User · Answer

For Unix  amp  Mac systems  Go to  bin setenv sh inside tomcat folder  Add the below line  export JAVA OPTS   JAVA OPTS -DAPP MASTER PASSWORD mypass   Now System getProperty  APP MASTER PASSWORD   will return  mypass

User · Answer

My recipe to fix it    DID NOT WORK    Set as system environment variable  I had set the environment variable in my mac bash profile  however  Tomcat did not see that variable  DID NOT WORK    setenv sh  Apache s recommendation was to have user-defined environment variables in setenv sh file and I did that  THIS WORKED      After a little research into Tomcat startup scripts  I found that environment variables set using setenv sh are lost during the startup   So I had to edit my catalina sh against the recommendation of Apache and that did the trick     Add your -DUSER DEFINED variable in the run command in catalina sh   eval exec      RUNJAVA        LOGGING CONFIG     LOGGING MANAGER  JAVA OPTS  CATALINA OPTS     -classpath     CLASSPATH        -Djava security manager     -Djava security policy      CATALINA BASE conf catalina policy        -Dcatalina base     CATALINA BASE        -Dcatalina home     CATALINA HOME        -Djava io tmpdir     CATALINA TMPDIR        -DUSER DEFINED   USER DEFINED      org apache catalina startup Bootstrap      start   P S   This problem could have been local to my computer   Others would have different problems  Adding my answer to this post just in case anyone is still facing issues with Tomcat not seeing the environment vars after trying out all recommended approaches

[java] Pass user defined environment variable to tomcat

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