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| |
| <document> |
| <properties> |
| <title>Upgrading from JCS 1.3 to 2.0</title> |
| <author email="tv@apache.org">Thomas Vandahl</author> |
| </properties> |
| |
| <body> |
| <section name="Upgrading from JCS 1.3 to 2.0"> |
| <p> |
| This document lists a number of things that changed in Commons JCS |
| 2.0. |
| </p> |
| <subsection name="Package Names and Maven Coordinates"> |
| <p> |
| The main difference is the move to the Apache Commons project |
| which lead to the change of the package names and Maven coordinates. |
| So in all your code replace |
| <source><![CDATA[ |
| import org.apache.jcs.*; |
| ]]></source> |
| with |
| <source><![CDATA[ |
| import org.apache.commons.jcs.*; |
| ]]></source> |
| The Maven coordinates change from |
| <source><![CDATA[ |
| <dependency> |
| <groupId>org.apache.jcs</groupId> |
| <artifactId>jcs</artifactId> |
| <version>1.3</version> |
| </dependency> |
| ]]></source> |
| to |
| <source><![CDATA[ |
| <dependency> |
| <groupId>org.apache.commons</groupId> |
| <artifactId>commons-jcs-core</artifactId> |
| <version>2.0</version> |
| </dependency> |
| ]]></source> |
| </p> |
| </subsection> |
| <subsection name="Change Cache Access Object"> |
| <p> |
| JCS now uses different cache access objects depending on |
| if you want to use cache groups or not. This was necessary |
| because the cache access objects are now generic which saves |
| you all the casts but doesn't allow different objects in the |
| same cache anymore. You now use |
| <source><![CDATA[ |
| import org.apache.commons.jcs.JCS; |
| import org.apache.commons.jcs.access.CacheAccess; |
| import org.apache.commons.jcs.access.GroupCacheAccess; |
| |
| CacheAccess<String, City> cityCache = JCS.getInstance( "city" ); |
| GroupCacheAccess<String, Country> countryCache = JCS.getGroupCacheInstance( "country" ); |
| ]]></source> |
| </p> |
| </subsection> |
| <subsection name="Adjusting the Configuration"> |
| <p> |
| Here again, change all package names in configuration entries |
| from e.g. |
| <source><![CDATA[ |
| jcs.default.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes |
| ]]></source> |
| to |
| <source><![CDATA[ |
| jcs.default.cacheattributes=org.apache.commons.jcs.engine.CompositeCacheAttributes |
| ]]></source> |
| and all <code>MaxLifeSeconds</code> lines to <code>MaxLife</code> |
| like |
| <source><![CDATA[ |
| jcs.default.elementattributes.MaxLifeSeconds=7 |
| ]]></source> |
| to |
| <source><![CDATA[ |
| jcs.default.elementattributes.MaxLife=7 |
| ]]></source> |
| </p> |
| <p> |
| The <code>IndexedDiskCache</code> recycle bin is no longer limited in size. |
| So remove all references to <code>MaxRecycleBinSize</code> from the configuration files. |
| </p> |
| </subsection> |
| </section> |
| </body> |
| </document> |
| |
| |
| |
