How can I specify system properties in Tomcat configuration on startup?

by

cliff.meyers‘s original answer that suggested using <env-entry> will not help when using only System.getProperty()

According to the Tomcat 6.0 docs <env-entry> is for JNDI. So that means it won’t have any effect on System.getProperty().

With the <env-entry> from cliff.meyers‘s example, the following code 

System.getProperty("SMTP_PASSWORD");

will return null, not the value “abc123ftw”.

According to the Tomcat 6 docs, to use <env-entry> you’d have to write code like this to use <env-entry>:

// Obtain our environment naming context
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");

// Look up our data source
String s = (String)envCtx.lookup("SMTP_PASSWORD");

Caveat: I have not actually tried the example above. But I have tried <env-entry> with System.getProperty(), and that definitely does not work.

More Related Contents:

  1. How to set the context path of a web application in Tomcat 7.0
  2. Recommended way to save uploaded files in a servlet application
  3. Servlet 5.0 JAR throws compile error on javax.servlet.* but Servlet 4.0 JAR does not
  4. Why must the JDBC driver be put in TOMCAT_HOME/lib folder?
  5. Set CORS header in Tomcat
  6. Is there a max size for POST parameter content?
  7. Does Tomcat load the same library file into memory twice if they are in two web apps?
  8. How to config Tomcat to serve images from an external folder outside webapps? [duplicate]
  9. Can’t access Tomcat using IP address
  10. How do you configure tomcat to bind to a single ip address (localhost) instead of all addresses?
  11. How to change Apache Tomcat web server port number [closed]
  12. Tomcat 10.x throws java.lang.NoClassDefFoundError on javax.servlet.* [duplicate]
  13. Absolute path & Relative Path
  14. IntelliJ and Tomcat.. Howto..?
  15. Is it possible change date in docker container?
  16. Get ServletContext in JAX-RS resource
  17. Access-Control-Allow-Origin: * in tomcat
  18. Is security-constraint configuration for Tomcat mandatory?
  19. How does Tomcat locate the webapps directory?
  20. How to use HttpServletRequest#getParts() in a servlet filter running on Tomcat?
  21. How to pass tomcat port number on command line?
  22. Error starting Tomcat from NetBeans – ‘127.0.0.1*’ is not recognized as an internal or external command
  23. Access Tomcat Manager App from different host
  24. CORS – Tomcat – Geoserver
  25. How do I load a java class (not a servlet) when the tomcat server starts [duplicate]
  26. How to set the max size of upload file
  27. What is the difference between Tomcat’s BIO Connector and NIO Connector?
  28. How can I map multiple contexts to the same war file in Tomcat?
  29. tomcat auto start servlet [duplicate]
  30. how to enable hot deploy in tomcat

Leave a Comment