如何修改每个 web 应用程序的 tomcat web.xml 位置

Question

I've multiple spring boot applications deployed in my tomcat server (as war files). My problem is I want to customize tomcat's default session-timeout for some of the webapps (ie. without editing the global $CATALINA_BASE/conf/web.xml ).

I searched and read tomcat docs. It seems the only way I can achieve that is by creating /WEB-INF/web.xml inside my war files that needs different session-timeout value. But we don't store app specific web.xml configurations in our source base.

So what I want to do is create a directory where I'll store all the webapp specific web.xml files and tell tomcat to load the web.xml file from there and not from my war's /WEB-INF/web.xml location.

Example:

For webapp A.war , B.war I want to have a directory $CATALINA_BASE/webxmls which has two web.xml inside like A_web.xml and B_web.xml . Tomcat will load these web.xml ignoring war's default /WEB-INF/web.xml path.

Answer 1

您可以通过以下方式更改 web.xml 的路径

<Context docBase="****" altDDName="$CATALINA_BASE/webxmls.xml">

Answer 2

I solved this problem by creating seperate context.xml for each webapp. According to tomcat docs context.xml has an attribute named altDDName which can override the absolute path of that webapp's web.xml . According to tomcat docs :

altDDName
The absolute path to the alternative deployment descriptor for this context. This overrides the default deployment descriptor located at /WEB-INF/web.xml.

So setting the absolute path of my external web.xml in altDDName will allow me to externally store all my webapp specific web.xml s.

Example:

Suppose I've two apps A.war and B.war . My tomcat is hosted in localhost. I create two seperate context.xml s in $CATALINA_BASE/conf/Catalina/localhost/A.xml & $CATALINA_BASE/conf/Catalina/localhost/B.xml with the following property:

A.xml

<Context altDDName="$CATALINA_BASE/webxmls/A_web.xml">
</Context>

and similarly B.xml :

<Context altDDName="$CATALINA_BASE/webxmls/B_web.xml">
</Context>

Now in $CATALINA_BASE/webxmls/A_web.xml I can store my external web.xml where I can override webapp specific session-timeout :

A_web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
  version="3.1">

    <session-config>
        <session-timeout>60</session-timeout>
    </session-config>

</web-app>

Similarly create new B_web.xml for B.war .

I hope there are better solution than this. But it solves my problem.