Adding An External Directory To Tomcat Classpath


Answer :

Just specify it in shared.loader or common.loader property of /conf/catalina.properties.


See also question: Can I create a custom classpath on a per application basis in Tomcat

Tomcat 7 Context hold Loader element. According to docs deployment descriptor (what in <Context> tag) can be placed in:

  • $CATALINA_BASE/conf/server.xml - bad - require server restarts in order to reread config
  • $CATALINA_BASE/conf/context.xml - bad - shared across all applications
  • $CATALINA_BASE/work/$APP.war:/META-INF/context.xml - bad - require repackaging in order to change config
  • $CATALINA_BASE/work/[enginename]/[hostname]/$APP/META-INF/context.xml - nice, but see last option!!
  • $CATALINA_BASE/webapps/$APP/META-INF/context.xml - nice, but see last option!!
  • $CATALINA_BASE/conf/[enginename]/[hostname]/$APP.xml - best - completely out of application and automatically scanned for changes!!!

Here my config which demonstrate how to use development version of project files out of $CATALINA_BASE hierarchy (note that I place this file into src/test/resources dir and intruct Maven to preprocess ${basedir} placeholders through pom.xml <filtering>true</filtering> so after build in new environment I copy it to $CATALINA_BASE/conf/Catalina/localhost/$APP.xml):

<Context docBase="${basedir}/src/main/webapp"          reloadable="true">     <!-- http://tomcat.apache.org/tomcat-7.0-doc/config/context.html -->     <Resources className="org.apache.naming.resources.VirtualDirContext"                extraResourcePaths="/WEB-INF/classes=${basedir}/target/classes,/WEB-INF/lib=${basedir}/target/${project.build.finalName}/WEB-INF/lib"/>     <Loader className="org.apache.catalina.loader.VirtualWebappLoader"             virtualClasspath="${basedir}/target/classes;${basedir}/target/${project.build.finalName}/WEB-INF/lib"/>     <JarScanner scanAllDirectories="true"/>      <!-- Use development version of JS/CSS files. -->     <Parameter name="min" value="dev"/>     <Environment name="app.devel.ldap" value="USER" type="java.lang.String" override="true"/>     <Environment name="app.devel.permitAll" value="true" type="java.lang.String" override="true"/> </Context>

UPDATE Tomcat 8 change syntax for <Resources> and <Loader> elements, corresponding part now look like:

<Resources>     <PostResources className="org.apache.catalina.webresources.DirResourceSet"                    webAppMount="/WEB-INF/classes" base="${basedir}/target/classes" />     <PostResources className="org.apache.catalina.webresources.DirResourceSet"                    webAppMount="/WEB-INF/lib" base="${basedir}/target/${project.build.finalName}/WEB-INF/lib" /> </Resources>

In Tomcat 6, the CLASSPATH in your environment is ignored. In setclasspath.bat you'll see

set CLASSPATH=%JAVA_HOME%\lib\tools.jar

then in catalina.bat, it's used like so

%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS%  -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%"  -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%"  -Djava.io.tmpdir="%CATALINA_TMPDIR%" %MAINCLASS% %CMD_LINE_ARGS% %ACTION%

I don't see any other vars that are included, so I think you're stuck with editing setclasspath.bat and changing how CLASSPATH is built. For Tomcat 6.0.20, this change was on like 74 of setclasspath.bat

set CLASSPATH=C:\app_config\java_app;%JAVA_HOME%\lib\tools.jar

Comments

Post a Comment

Popular posts from this blog

Converting A String To Int In Groovy

Answer : Use the toInteger() method to convert a String to an Integer , e.g. int value = "99".toInteger() An alternative, which avoids using a deprecated method (see below) is int value = "66" as Integer If you need to check whether the String can be converted before performing the conversion, use String number = "66" if (number.isInteger()) { int value = number as Integer } Deprecation Update In recent versions of Groovy one of the toInteger() methods has been deprecated. The following is taken from org.codehaus.groovy.runtime.StringGroovyMethods in Groovy 2.4.4 /** * Parse a CharSequence into an Integer * * @param self a CharSequence * @return an Integer * @since 1.8.2 */ public static Integer toInteger(CharSequence self) { return Integer.valueOf(self.toString().trim()); } /** * @deprecated Use the CharSequence version * @see #toInteger(CharSequence) */ @Deprecated public static Integer toInteger(String self) { return toInteg
Read more

"Cannot Create Cache Directory /home//.composer/cache/repo/https---packagist.org/, Or Directory Is Not Writable. Proceeding Without Cache"

Answer : if anyone pass through here, this is shorter solution: sudo chown -R $USER $HOME/.composer it seems to me the group information is missing in your command sudo chown -R <user> /home/<user>/.composer/cache/repo/https---packagist.org Shoud be sudo chown -R <user>:<group> /home/<user>/.composer/cache/repo/https---packagist.org But to avoid other permission issues, I would rather advise: sudo chown -R <user>:<group> /home/<user>/.composer/cache (you'll need access to other folders in there) and sudo chown <user>:<group> /home/<user>/.composer To make sure your user has permissions enough on the global composer folder. Mind the missing recursion so the user don't own keys created by root. If you need to find out the group: groups <user>
Read more

Android How Can I Convert A String To A Editable

Answer : As you probably found out, Editable is an interface so you cannot call new Editable() . However an Editable is nothing more than a String with Spannables, so use SpannableStringBuilder: Editable editable = new SpannableStringBuilder("Pass a string here"); If you only want to change the Spannables, never the text itself, you can use a basic SpannableString. Use Editable.Factory.getInstance().newEditable(str) From the android documentation: Returns a new SpannedStringBuilder from the specified CharSequence. You can override this to provide a different kind of Spanned.
Read more