src/org/objectweb/cjdbc/controller/cache/result/ResultCacheFactory.java

説明を見る。

package org.objectweb.cjdbc.controller.cache.result;

import java.util.Hashtable;

import org.objectweb.cjdbc.common.xml.DatabasesXmlTags;
import org.objectweb.cjdbc.controller.cache.result.rules.EagerCaching;
import org.objectweb.cjdbc.controller.cache.result.rules.NoCaching;
import org.objectweb.cjdbc.controller.cache.result.rules.RelaxedCaching;

public class ResultCacheFactory
{
  public static AbstractResultCache getCacheInstance(int granularityValue,
      int maxEntries, int pendingTimeout) throws InstantiationException
  {
    AbstractResultCache currentRequestCache = null;
    switch (granularityValue)
    {
      case CachingGranularities.TABLE :
        currentRequestCache = new ResultCacheTable(maxEntries, pendingTimeout);
        break;
      case CachingGranularities.DATABASE :
        currentRequestCache = new ResultCacheDatabase(maxEntries,
            pendingTimeout);
        break;
      case CachingGranularities.COLUMN :
        currentRequestCache = new ResultCacheColumn(maxEntries, pendingTimeout);
        break;
      case CachingGranularities.COLUMN_UNIQUE :
        currentRequestCache = new ResultCacheColumnUnique(maxEntries,
            pendingTimeout);
        break;
      default :
        throw new InstantiationException("Invalid Granularity Value");
    }
    return currentRequestCache;
  }

  public static CacheBehavior getCacheBehaviorInstance(String behaviorString,
      Hashtable options)
  {
    if (behaviorString.equalsIgnoreCase(DatabasesXmlTags.ELT_NoCaching))
      return new NoCaching();
    if (behaviorString.equals(DatabasesXmlTags.ELT_EagerCaching))
      return new EagerCaching();
    if (behaviorString.equals(DatabasesXmlTags.ELT_RelaxedCaching))
    {
      // Timeout is in seconds: *1000
      long timeout = 1000 * Long.parseLong((String) options
          .get(DatabasesXmlTags.ATT_timeout));
      boolean keepIfNotDirty = new Boolean((String) options
          .get(DatabasesXmlTags.ATT_keepIfNotDirty)).booleanValue();
      return new RelaxedCaching(keepIfNotDirty, timeout);
    }
    else
      return null;
  }
}

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