Mercurial > dive4elements > gnv-client
comparison geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/QueryExecutor.java @ 895:eb777022b628
Integrated a CacheCleaner that will cleanup the SQL-Cache if necessary
geo-backend/trunk@958 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Tim Englich <tim.englich@intevation.de> |
|---|---|
| date | Tue, 20 Apr 2010 12:42:17 +0000 |
| parents | b757def3ff55 |
| children | 02cd2935b5fa |
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| 894:d674cef2ca0d | 895:eb777022b628 |
|---|---|
| 1 package de.intevation.gnv.geobackend.base.query; | 1 package de.intevation.gnv.geobackend.base.query; |
| 2 | 2 |
| 3 import java.util.Collection; | |
| 4 | |
| 3 import de.intevation.gnv.geobackend.base.Result; | 5 import de.intevation.gnv.geobackend.base.Result; |
| 4 | |
| 5 import de.intevation.gnv.geobackend.base.query.exception.QueryException; | 6 import de.intevation.gnv.geobackend.base.query.exception.QueryException; |
| 6 | |
| 7 import java.util.Collection; | |
| 8 | 7 |
| 9 /** | 8 /** |
| 10 * This Interface provides the Method to execute Queries | 9 * This Interface provides the Method to execute Queries |
| 11 * against a Datastore eg. Databases | 10 * against a Datastore eg. Databases |
| 12 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | 11 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> |
| 21 * @param queryID the ID of the Query which should be used. | 20 * @param queryID the ID of the Query which should be used. |
| 22 * @param filter the Filterarguments to limit the Data | 21 * @param filter the Filterarguments to limit the Data |
| 23 * @return the fetched Values | 22 * @return the fetched Values |
| 24 * @throws QueryException | 23 * @throws QueryException |
| 25 */ | 24 */ |
| 26 Collection<Result> executeQuery(String queryID, String[] filter) throws QueryException; | 25 Collection<Result> executeQuery(String queryID, |
| 26 String[] filter) | |
| 27 throws QueryException; | |
| 27 | 28 |
| 29 /** | |
| 30 * Returns the cached results to a given Query. | |
| 31 * @param query the Query that should identify the Result | |
| 32 * @return the Cached results or null if no results are cached. | |
| 33 */ | |
| 28 Collection<Result> cachedResults(String query); | 34 Collection<Result> cachedResults(String query); |
| 29 | 35 |
| 36 /** | |
| 37 * Writes the Result into the Cache | |
| 38 * @param query the Query that will be used as Identifier. | |
| 39 * @param results The Results that should be cached. | |
| 40 */ | |
| 30 void cacheResults(String query, Collection<Result> results); | 41 void cacheResults(String query, Collection<Result> results); |
| 42 | |
| 43 /** | |
| 44 * Clears the Cache using the Names of the Database-Tables | |
| 45 * @param tableNames the Tablenames that should be used to Clear the Cache. | |
| 46 */ | |
| 47 void clearCache(String[] tableNames); | |
| 31 } | 48 } |