3 Replies Latest reply on Jul 2, 2009 4:07 AM by Mircea Markus

    Multiple Cache Loaders

    lords_diakonos Newbie

      I need multiple cache loaders where certain regions get cached in the second loader but and other regions are only in teh first cacheloader.

      How do I configure this. I didn't see it in the manual. I am using 2.2.0CR6

        • 1. Re: Multiple Cache Loaders
          lords_diakonos Newbie

          OK I have tried to extend the FileCacheLoader and use that to test what I am after. The issue is that I have break points on isCharacterPortableTree and isCharacterPortableLocation but I am not hitting either method and I don't understand why. I know my class is being loaded as I also put a break point in the constructor. But my get, puts or isCharacterPortableLocation methods are never called.

          I was hoping to do this and test my case mentioned above to ignore a specific region in this cacheLoader. Basically I don't want one of the regions in disk cache but only memory cache.

          My config is as follows

           <attribute name="IsolationLevel">READ_COMMITTED</attribute>
          
          <attribute name="CacheLoaderConfig">
           <config>
           <passivation>false</passivation>
           <cacheloader>
           <class>com.dotmarketing.business.TestLoader</class>
           <properties>
           location=/Users/jasontesser/dev/dotcms/trunk/cachetest
           check.character.portability=true
           </properties>
           <async>false</async>
           <fetchPersistentState>true</fetchPersistentState>
           <ignoreModifications>false</ignoreModifications>
           </cacheloader>
           </config>
          </attribute>
          


          And my class

          public TestLoader() {
           super();
           }
          
           @Override
           public Map get(Fqn fqn) throws Exception {
           // TODO Auto-generated method stub
           return super.get(fqn);
           }
          
           @Override
           public void put(Fqn arg0, Map arg1, boolean arg2) throws Exception {
           // TODO Auto-generated method stub
           super.put(arg0, arg1, arg2);
           }
          
           @Override
           public Object put(Fqn arg0, Object arg1, Object arg2) throws Exception {
           // TODO Auto-generated method stub
           return super.put(arg0, arg1, arg2);
           }
          
           @Override
           public void put(Fqn fqn, Map attributes) throws Exception {
           // TODO Auto-generated method stub
           super.put(fqn, attributes);
           }
          
           @Override
           public void put(List<Modification> arg0) throws Exception {
           // TODO Auto-generated method stub
           super.put(arg0);
           }
          
           protected boolean isCharacterPortableLocation(String fileAbsolutePath) {
           if(fileAbsolutePath.indexOf("VelocityCache")>-1){
           return false;
           }
           return true;
          // return super.isCharacterPortableLocation(fileAbsolutePath);
           }
          
           protected boolean isCharacterPortableTree(Fqn fqn) {
           List elements = fqn.peekElements();
           // Don't assume the Fqn is composed of Strings!!
           for (Object anElement : elements){
           if(anElement.toString().contains("VelocityCache")){
           return false;
           }
           }
           return true;
          // return super.isCharacterPortableTree(fqn);
           }
          


          • 2. Re: Multiple Cache Loaders
            lords_diakonos Newbie

            I guess I had to make the methods public but still how do I configure what I am after?

            • 3. Re: Multiple Cache Loaders
              Mircea Markus Master

              There's no out of the box support for this, I'm afraid. One way to approach it is to create a delegating cache loader, that can be configured to only handle a given region (children of a given fqn).
              Then this new cache loader can be used to wrap the actual cache loaders you want to use, and make each one of them take care of a single region. Take a look at how ReadOnlyDelegatingCacheLoader is implemented, you need something similar.