org.jboss.resource.adapter.jdbc: public class: PreparedStatementCache

org.jboss.resource.adapter.jdbc
public class: PreparedStatementCache [javadoc | source]

java.lang.Object
   org.jboss.util.LRUCachePolicy
      org.jboss.resource.adapter.jdbc.PreparedStatementCache

All Implemented Interfaces:
CachePolicy

LRU cache for PreparedStatements. When ps ages out, close it.

author: < - a href="mailto:bill@jboss.org">Bill Burke

author: < - a href="mailto:adrian@jboss.com">Adrian Brock

author: Scott.Stark - @jboss.org

version: $ - Revision: 73034 $

Nested Class Summary:
public static class	PreparedStatementCache.Key

Fields inherited from org.jboss.util.LRUCachePolicy:
m_map, m_list, m_maxCapacity, m_minCapacity

Constructor:
public PreparedStatementCache(int max) { super(2, max); create(); }

Method from org.jboss.resource.adapter.jdbc.PreparedStatementCache Summary:
ageOut, toString

Methods from org.jboss.util.LRUCachePolicy:
ageOut, cacheMiss, create, createCacheEntry, createList, destroy, flush, get, insert, peek, remove, size, start, stop

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.jboss.resource.adapter.jdbc.PreparedStatementCache Detail:
protected void ageOut(LRUCachePolicy.LRUCacheEntry entry) { try { CachedPreparedStatement ws = (CachedPreparedStatement) entry.m_object; ws.agedOut(); } catch (SQLException e) { log.debug("Failed closing cached statement", e); } finally { super.ageOut(entry); } }
public String toString() { String s = " PreparedStatementCache size: " + m_list.m_count; for (LRUCacheEntry entry = m_list.m_head; entry != null; entry = entry.m_next) { CachedPreparedStatement ws = (CachedPreparedStatement) entry.m_object; PreparedStatementCache.Key key = (PreparedStatementCache.Key) entry.m_key; s += "[" + key.getSql() + "] "; } return s + "\n"; }

Method from org.jboss.resource.adapter.jdbc.PreparedStatementCache Detail:

 protected  void ageOut(LRUCachePolicy.LRUCacheEntry entry) {
      try
      {
         CachedPreparedStatement ws = (CachedPreparedStatement) entry.m_object;
         ws.agedOut();
      }
      catch (SQLException e)
      {
         log.debug("Failed closing cached statement", e);
      }
      finally
      {
         super.ageOut(entry);
      }
}

 public String toString() {
	   String s = " PreparedStatementCache size: " + m_list.m_count;
	   for (LRUCacheEntry entry = m_list.m_head; entry != null; entry = entry.m_next)
	   {
		   CachedPreparedStatement ws = (CachedPreparedStatement) entry.m_object;
		   PreparedStatementCache.Key key = (PreparedStatementCache.Key) entry.m_key;
		   s += "[" + key.getSql() + "] ";
	   }
	   return s + "\n";
}