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| <?xml version="1.0"?> | ||
| <!-- | ||
| Licensed to the Apache Software Foundation (ASF) under one | ||
| or more contributor license agreements. See the NOTICE file | ||
| distributed with this work for additional information | ||
| regarding copyright ownership. The ASF licenses this file | ||
| to you under the Apache License, Version 2.0 (the | ||
| "License"); you may not use this file except in compliance | ||
| with the License. You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, | ||
| software distributed under the License is distributed on an | ||
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| KIND, either express or implied. See the License for the | ||
| specific language governing permissions and limitations | ||
| under the License. | ||
| --> | ||
|
|
||
| <document> | ||
| <properties> | ||
| <title>Upgrading from JCS 2.x to 3.0</title> | ||
| <author email="tv@apache.org">Thomas Vandahl</author> | ||
| </properties> | ||
|
|
||
| <body> | ||
| <section name="Upgrading from JCS 2.x to 3.0"> | ||
| <p> | ||
| This document lists a number of things that changed in Commons JCS | ||
| 3.0. | ||
| </p> | ||
| <subsection name="Package Names and Maven Coordinates"> | ||
| <p> | ||
| The Apache Commons project requires a change of the package names | ||
| and Maven coordinates on a major release. | ||
| So in all your code replace | ||
| <source><![CDATA[ | ||
| import org.apache.commons.jcs.*; | ||
| ]]></source> | ||
| with | ||
| <source><![CDATA[ | ||
| import org.apache.commons.jcs3.*; | ||
| ]]></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-jcs3-core</artifactId> | ||
| <version>3.0</version> | ||
| </dependency> | ||
| ]]></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.commons.jcs.engine.CompositeCacheAttributes | ||
| ]]></source> | ||
| to | ||
| <source><![CDATA[ | ||
| jcs.default.cacheattributes=org.apache.commons.jcs3.engine.CompositeCacheAttributes | ||
| ]]></source> | ||
| </p> | ||
| </subsection> | ||
| <subsection name="Logging Abstraction"> | ||
| <p> | ||
| JCS 3.0 uses its own log abstraction layer. As newer and better | ||
| log systems become available, JCS is no longer limited to | ||
| commons-logging. As a result, JCS now uses java.util.logging as | ||
| default and does not depend on commons-logging anymore. | ||
| </p> | ||
| <p> | ||
| Optionally, JCS can use Log4j2 as a log system. You can activate | ||
| it by providing log4j.core as a dependency, a log configuration | ||
| such as log4j2.xml and a system property | ||
| <source><![CDATA[ | ||
| -Djcs.logSystem=log4j2 | ||
| ]]></source> | ||
| As log initialization occurs very early in the startup process, | ||
| be sure to add this property before accessing any of JCS' classes. | ||
| </p> | ||
| <p> | ||
| JCS uses the Java SPI mechanism to find its log systems. If you want | ||
| to roll your own, you will need to implement a | ||
| <code>org.apache.commons.jcs.log.Log</code> object and a | ||
| <code>org.apache.commons.jcs.log.LogFactory</code> | ||
| and provide the implementation class in a text file | ||
| <code>META-INF/services/org.apache.commons.jcs.log.LogFactory</code> | ||
| in your code. Choose a name for your log system and activate it via | ||
| the system property as described above. | ||
| </p> | ||
| </subsection> | ||
| </section> | ||
| </body> | ||
| </document> | ||
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