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Index on JDBCCacheLoader
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created by <a href="http://community.jboss.org/people/maurizio.mercatis">Maurizio Mauri</a> in <i>JBoss Cache</i> - <a href="http://community.jboss.org/message/587257#587257">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi everybody!!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have developed a cache component to support a web application with JBossCache and it works fine.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have chosen a JDBCCacheLoader to deal with persistence activities. Now for a particular reason I have to schedule a task (during the night) that perform some activities on my contents tree.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>To visit all my nodes I have set up a recursive function that perform this instruction "node.getChildren()" but it seems quite slow with lots of entries. I have placed an index on "FQN_parent" column to improve the performance and I have observed a great improvement (about 100 time).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Considering that JDBC retrieve metadata about index could it be a good idea to support this kind of activities?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><loader class="org.jboss.cache.loader.JDBCCacheLoader" async="false" fetchPersistentState="true" ignoreModifications="false" purgeOnStartup="false"></p><p>          <properties></p><p>                    cache.jdbc.table.name=jbosscache</p><p>                    cache.jdbc.table.create=true</p><p>                    cache.jdbc.table.drop=true</p><p>                    cache.jdbc.table.primarykey=jbosscache_pk</p><p>   <!-- cache.jdbc.table.index=ix_jbosscache --></p><p>                    cache.jdbc.fqn.column=fqn</p><p>                    cache.jdbc.fqn.type=VARCHAR(255)</p><p>                    cache.jdbc.node.column=node</p><p>                    cache.jdbc.node.type=BLOB</p><p>                    cache.jdbc.parent.column=parent</p><p>                    cache.jdbc.driver=oracle.jdbc.OracleDriver</p><p>                    cache.jdbc.url=jdbc:oracle:thin:@localhost:1521:JBOSSDB</p><p>                    cache.jdbc.user=SCOTT</p><p>                    cache.jdbc.password=TIGER</p><p>          </properties></p><p></loader></p></div>
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