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This commit is contained in:
John Cortell 2010-10-28 15:50:33 +00:00
parent c83b49a790
commit c0f40ceb47
1 changed files with 15 additions and 3 deletions
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18
dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/RangeCache.java
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@ -23,10 +23,22 @@ import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.Status;
/**
* Cache for retrieving ranges of elements from an asynchronous data source.
* Cache for efficiently retrieving overlapping ranges of elements from an
* asynchronous data source. The results of a range request (see
* {@link #getRange(long, int)}) are kept around and reused in subsequent
* requests. E.g., two individual, initial requests for 4 bytes at offsets 0 and
* 4 will relieve a subsequent request for 4 bytes at offset 2 from having to
* asynchronously retrieve the data from the source. The results from the first
* two range requests are used to service the third.
*
* <p>
* Clients of this cache should call {@link #getRange(long, int)} to get a cache
* for that given range of elements. Sub-classes must implement {@link #retrieve(long, int, DataRequestMonitor)}
* to retrieve data from the asynchronous data source.
* for that given range of elements. Sub-classes must implement
* {@link #retrieve(long, int, DataRequestMonitor)} to retrieve data from the
* asynchronous data source.
*
*
*
* @since 2.2
*/
abstract public class RangeCache<V> {