| java.lang.Object
 org.mmbase.cache.ReleaseStrategy
All known Subclasses: org.mmbase.cache.ChainedReleaseStrategy, org.mmbase.cache.BetterStrategy, org.mmbase.cache.BasicReleaseStrategy, org.mmbase.cache.ConstraintsMatchingStrategy,
| ReleaseStrategy | | abstract public class ReleaseStrategy (Code) | |
This class is the base for all cache release strategies. You should extend
this to create your own. It will contain a number of usefull utility methods
to analyze query objecs and cached search results. Feel free to add those In
case you miss one developing your own strategies.
author:
Ernst Bunders
since:
MMBase-1.8
version:
$Id: ReleaseStrategy.java,v 1.23 2007/02/24 21:57:51 nklasens Exp $ |
| Inner Class :public static class StrategyResult | |
| Inner Class :final protected static class Timer | |
| Method Summary | |
| public void | clear()
| | abstract protected boolean | doEvaluate(NodeEvent event, SearchQuery query, List<MMObjectNode> cachedResult)
implement this method to create your own strategy. | | abstract protected boolean | doEvaluate(RelationEvent event, SearchQuery query, List<MMObjectNode> cachedResult)
implement this method to create your own strategy. | | public boolean | equals(Object ob)
| | final public StrategyResult | evaluate(NodeEvent event, SearchQuery query, List<MMObjectNode> cachedResult)
This method checks if evaluation should happen (active), keeps the time
of the operation and updates the statistics. | | final public StrategyResult | evaluate(RelationEvent event, SearchQuery query, List<MMObjectNode> cachedResult)
| | public int | getAvgEvaluationTimeInMilis()
| | protected static List<Constraint> | getConstraintsForField(String fieldName, MMObjectBuilder builder, Constraint constraint, SearchQuery query)
utility for specializations: get all the constraints in the query that apply to
a certain field
TODO MM: This method is used like this:
if(getConstraintsForField(fieldName, eventBuilder, constraint, query).size() > 0){ return false;}
IOW, only the size of the return list is used, and then even whether it is 0 or not. | | abstract public String | getDescription()
| | abstract public String | getName()
| | protected static List<SortOrder> | getSortordersForField(String fieldName, MMObjectBuilder builder, List<SortOrder> sortOrders, SearchQuery query)
| | public int | getTotalEvaluated()
| | public long | getTotalEvaluationTimeMillis()
| | public int | getTotalPreserved()
| | public int | hashCode()
| | public boolean | isEnabled()
| | public void | setEnabled(boolean newStatus)
| | public String | toString()
|
| ReleaseStrategy | | public ReleaseStrategy()(Code) | | |
| clear | | public void clear()(Code) | | |
| doEvaluate | | abstract protected boolean doEvaluate(NodeEvent event, SearchQuery query, List<MMObjectNode> cachedResult)(Code) | | implement this method to create your own strategy.
Parameters:
event - a node event
Parameters:
query -
Parameters:
cachedResult - true if the cache entry should be released |
| doEvaluate | | abstract protected boolean doEvaluate(RelationEvent event, SearchQuery query, List<MMObjectNode> cachedResult)(Code) | | implement this method to create your own strategy.
Parameters:
event - a relation event
Parameters:
query -
Parameters:
cachedResult - true if the cache entry should be released |
| getAvgEvaluationTimeInMilis | | public int getAvgEvaluationTimeInMilis()(Code) | | |
| getConstraintsForField | | protected static List<Constraint> getConstraintsForField(String fieldName, MMObjectBuilder builder, Constraint constraint, SearchQuery query)(Code) | | utility for specializations: get all the constraints in the query that apply to
a certain field
TODO MM: This method is used like this:
if(getConstraintsForField(fieldName, eventBuilder, constraint, query).size() > 0){ return false;}
IOW, only the size of the return list is used, and then even whether it is 0 or not. I think it is a waste to construct a complete new list, only for that.
Perhaps the method should return an Iterator?, and can be used with only 'hasNext()', constructing a longer list then necessary is avoided then.
Parameters:
fieldName -
Parameters:
builder -
Parameters:
constraint -
Parameters:
query - |
| getTotalEvaluated | | public int getTotalEvaluated()(Code) | | |
| getTotalEvaluationTimeMillis | | public long getTotalEvaluationTimeMillis()(Code) | | |
| getTotalPreserved | | public int getTotalPreserved()(Code) | | |
| hashCode | | public int hashCode()(Code) | | |
| isEnabled | | public boolean isEnabled()(Code) | | |
| setEnabled | | public void setEnabled(boolean newStatus)(Code) | | |
|
|