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optimized for oracle

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wenshao
2012-01-02 00:17:39 +08:00
parent 028a1d4fb5
commit 7f7dd5e6bb
12 changed files with 247 additions and 113 deletions
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src/main/java/com/alibaba/druid/pool/PreparedStatementPool.java
+32 -12
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@@ -22,13 +22,18 @@ import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import com.alibaba.druid.logging.Log;
import com.alibaba.druid.logging.LogFactory;
import com.alibaba.druid.pool.PoolablePreparedStatement.PreparedStatementKey;
import com.alibaba.druid.util.OracleUtils;
/**
* @author wenshao<szujobs@hotmail.com>
*/
public class PreparedStatementPool {
private final static Log LOG = LogFactory.getLog(PreparedStatementPool.class);
private final Map<PreparedStatementKey, PreparedStatementHolder> map;
private final DruidAbstractDataSource dataSource;
@@ -45,12 +50,13 @@ public class PreparedStatementPool {
M1, M2, M3, M4, M5, M6, Precall_1, Precall_2, Precall_3
}
public PreparedStatementHolder get(PreparedStatementKey key) {
public PreparedStatementHolder get(PreparedStatementKey key) throws SQLException {
PreparedStatementHolder holder = map.get(key);
if (holder != null) {
holder.incrementHitCount();
dataSource.incrementCachedPreparedStatementHitCount();
OracleUtils.exitImplicitCacheToActive(holder.getStatement());
} else {
dataSource.incrementCachedPreparedStatementMissCount();
}
@@ -65,9 +71,14 @@ public class PreparedStatementPool {
return;
}
if (dataSource.isOracle()) {
OracleUtils.enterImplicitCache(stmt);
}
PreparedStatementKey key = holder.getKey();
PreparedStatementHolder oldHolder = map.put(key, holder);
if (oldHolder != null) {
if (oldHolder != null && oldHolder != holder) {
dataSource.closePreapredStatement(oldHolder);
} else {
if (holder.getHitCount() == 0) {
@@ -75,20 +86,27 @@ public class PreparedStatementPool {
}
}
}
public void clear() {
public void clear() throws SQLException {
Iterator<Entry<PreparedStatementKey, PreparedStatementHolder>> iter = map.entrySet().iterator();
while (iter.hasNext()) {
Entry<PreparedStatementKey, PreparedStatementHolder> entry = iter.next();
dataSource.closePreapredStatement(entry.getValue());
dataSource.decrementCachedPreparedStatementCount();
dataSource.incrementCachedPreparedStatementDeleteCount();
closeStatement(entry.getValue());
iter.remove();
}
}
private void closeStatement(PreparedStatementHolder holder) throws SQLException {
if (dataSource.isOracle()) {
OracleUtils.exitImplicitCacheToClose(holder.getStatement());
}
dataSource.closePreapredStatement(holder);
dataSource.decrementCachedPreparedStatementCount();
dataSource.incrementCachedPreparedStatementDeleteCount();
}
public Map<PreparedStatementKey, PreparedStatementHolder> getMap() {
return map;
}
@@ -105,9 +123,11 @@ public class PreparedStatementPool {
boolean remove = (size() > dataSource.getMaxPoolPreparedStatementPerConnectionSize());
if (remove) {
dataSource.closePreapredStatement(eldest.getValue());
dataSource.decrementCachedPreparedStatementCount();
dataSource.incrementCachedPreparedStatementDeleteCount();
try {
closeStatement(eldest.getValue());
} catch (SQLException e) {
LOG.error("closeStatement error", e);
}
}
return remove;