| Pipeline Implementation |
| ----------------------- |
| The Implementation uses the following parameters: |
| |
| cache-key : the key of the cache entry |
| cache-expires : the time frame the cache is valid in seconds |
| purge-cache : when set to true the cache is purged |
| |
| Action |
| ------ |
| Deletes one entry with the given key from the cache |
| cache-role: the role of the cache |
| cache-key : the key of the cache entry |
| |
| |
| Caching Source Implementation |
| ----------------------------- |
| |
| Configuration in the cocoon.xconf: |
| |
| <source-factories> |
| ... |
| |
| <component-instance class="org.apache.cocoon.components.source.impl.CachingSourceFactory" name="cached"> |
| </component-instance> |
| <component-instance class="org.apache.cocoon.components.source.impl.CachingSourceFactory" name="acached"> |
| <parameter name="async" value="true"/> |
| </component-instance> |
| </source-factories> |
| |
| Synced caching |
| -------------- |
| |
| Caches another source for a given period of time. Usage: |
| |
| cached://EXPIRES@URL or cached://EXPIRES@CACHE_KEY@URL |
| |
| If the cached content expires, the content is fetched new on the next request. |
| |
| Example: cached://60@http://www.s-und-n.de |
| |
| The source http://www.s-und-n.de is cached for 60 seconds using the key |
| http://www.s-und-n.de. |
| |
| Example: cached://60@main@http://www.s-und-n.de. |
| |
| The source http://www.s-und-n.de is cached for 60 seconds using the key main. |
| |
| Async caching |
| ------------- |
| |
| Example: acached://60@http://www.s-und-n.de |
| |
| The source is refreshed in background every 60 seconds and |
| is always streamed using the cached version. |
| |
| |
| Configuration |
| ============= |
| |
| The new cron scheduler from the cron block is used for scheduling. |
| |
| Configuration in cocoon.xconf: |
| |
| <!-- This is a sample target, that is called as configured in the sample above --> |
| <component role="org.apache.avalon.cornerstone.services.scheduler.Target/update" |
| class="org.apache.cocoon.components.source.impl.UpdateTarget"/> |
| |
| <component class="org.apache.cocoon.components.source.impl.RefresherImpl" role="org.apache.cocoon.components.source.impl.Refresher"> |
| <parameter name="scheduler-target" value="org.apache.avalon.cornerstone.services.scheduler.Target/update"/> |
| <parameter name="write-interval" value="3600"/> |
| <parameter name="write-target" value="org.apache.cocoon.components.source.impl.Refresher"/> |
| <parameter name="write-source" value="context://targets.xml"/> |
| </component> |
| |
| The last component, the Refresher, persists the configuration of the scheduler |
| to an xml file. This file is read on startup and the registered sources are |
| fetched in the background. |
| |
