Multiple Cache Loaders

[lords_diakonos]

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

[lords_diakonos]

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);
 }

[lords_diakonos]

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

[mircea.markus]

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.