Author: kkolinko
Date: Fri Mar 22 21:33:35 2013
New Revision: 1460006
URL: http://svn.apache.org/r1460006
Log:
Merged revision 1459769 from tomcat/trunk:
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54732
Fix leak of statements in StatementCache interceptor.
Based on patch by Bertrand Guay-Paquet (BZ 54732) / Patric Rufflar (BZ 54337)
Added:
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCounterInterceptor.java
- copied unchanged from r1459769,
tomcat/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCounterInterceptor.java
Modified:
tomcat/tc7.0.x/trunk/ (props changed)
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/main/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCache.java
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/test/TestStatementCache.java
tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc7.0.x/trunk/
------------------------------------------------------------------------------
Merged /tomcat/trunk:r1459769
Modified:
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/main/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCache.java
URL:
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/main/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCache.java?rev=1460006&r1=1460005&r2=1460006&view=diff
==============================================================================
---
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/main/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCache.java
(original)
+++
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/main/java/org/apache/tomcat/jdbc/pool/interceptor/StatementCache.java
Fri Mar 22 21:33:35 2013
@@ -245,11 +245,11 @@ public class StatementCache extends Stat
removeStatement(proxy);
}
}
- closed = true;
- delegate = null;
if (shouldClose) {
super.closeInvoked();
}
+ closed = true;
+ delegate = null;
}
Modified:
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/test/TestStatementCache.java
URL:
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/test/TestStatementCache.java?rev=1460006&r1=1460005&r2=1460006&view=diff
==============================================================================
---
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/test/TestStatementCache.java
(original)
+++
tomcat/tc7.0.x/trunk/modules/jdbc-pool/src/test/java/org/apache/tomcat/jdbc/test/TestStatementCache.java
Fri Mar 22 21:33:35 2013
@@ -16,6 +16,7 @@
*/
package org.apache.tomcat.jdbc.test;
+import java.lang.reflect.Proxy;
import java.sql.Connection;
import java.sql.PreparedStatement;
@@ -23,7 +24,9 @@ import org.junit.After;
import org.junit.Assert;
import org.junit.Test;
+import org.apache.tomcat.jdbc.pool.JdbcInterceptor;
import org.apache.tomcat.jdbc.pool.interceptor.StatementCache;
+import org.apache.tomcat.jdbc.pool.interceptor.StatementCounterInterceptor;
public class TestStatementCache extends DefaultTestCase {
@@ -108,6 +111,55 @@ public class TestStatementCache extends
}
@Test
+ public void testStatementClose1() throws Exception {
+ init();
+ datasource.setJdbcInterceptors(
+ TestStatementCacheInterceptor.class.getName()
+ + "(prepared=true,callable=false,max=1);"
+ + StatementCounterInterceptor.class.getName());
+ Connection con = datasource.getConnection();
+ StatementCounterInterceptor counter = findInterceptor(con,
StatementCounterInterceptor.class);
+ PreparedStatement ps1, ps2;
+
+ ps1 = con.prepareStatement("select 1");
+ Assert.assertEquals(1, counter.getActiveCount());
+ ps1.close();
+ Assert.assertEquals("Statement goes into cache, not closed", 1,
counter.getActiveCount());
+
+ ps1 = con.prepareStatement("select 1");
+ Assert.assertEquals("Reusing statement from cache", 1,
counter.getActiveCount());
+ ps2 = con.prepareStatement("select 1");
+ Assert.assertEquals("Reusing statement from cache", 2,
counter.getActiveCount());
+
+ ps2.close();
+ Assert.assertEquals("Statement goes into cache, not closed", 2,
counter.getActiveCount());
+ ps1.close();
+ // Cache has "max=1". The following tests BZ 54732.
+ Assert.assertEquals("Statement does not go into cache, closed", 1,
counter.getActiveCount());
+
+ con.close();
+ Assert.assertEquals("Connection returned to the pool. Statement is in
cache", 1, counter.getActiveCount());
+
+ datasource.close();
+ Assert.assertEquals("Pool cleared. All statements in cache are
closed", 0, counter.getActiveCount());
+ }
+
+ @Test
+ public void testStatementClose2() throws Exception {
+ init();
+ datasource.setJdbcInterceptors(
+ TestStatementCacheInterceptor.class.getName()
+ + "(prepared=false,callable=false,max=10);"
+ + StatementCounterInterceptor.class.getName());
+ Connection con = datasource.getConnection();
+ StatementCounterInterceptor counter = findInterceptor(con,
StatementCounterInterceptor.class);
+ PreparedStatement ps1 = con.prepareStatement("select 1");
+ Assert.assertEquals(1, counter.getActiveCount());
+ ps1.close();
+ Assert.assertEquals("Statement is not pooled, closes immediately", 0,
counter.getActiveCount());
+ }
+
+ @Test
public void testMaxCacheSize() throws Exception {
init();
config(true,false,100);
@@ -127,4 +179,27 @@ public class TestStatementCache extends
TestStatementCache.interceptor = this;
}
}
+
+ /**
+ * Helper method that finds interceptor instance in interceptor chain of a
+ * proxied class.
+ *
+ * @param proxy
+ * Proxy class
+ * @param clazz
+ * Interceptor class that we are looking for
+ * @return Instance of <code>clazz</code>
+ */
+ private static <T extends JdbcInterceptor> T findInterceptor(Object proxy,
+ Class<T> clazz) {
+ JdbcInterceptor interceptor = (JdbcInterceptor) Proxy
+ .getInvocationHandler(proxy);
+ while (interceptor != null) {
+ if (clazz.isInstance(interceptor)) {
+ return clazz.cast(interceptor);
+ }
+ interceptor = interceptor.getNext();
+ }
+ return null;
+ }
}
Modified: tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml?rev=1460006&r1=1460005&r2=1460006&view=diff
==============================================================================
--- tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml Fri Mar 22 21:33:35 2013
@@ -65,6 +65,10 @@
Fix minor threading issue in <code>ConnectionPool</code>.
(markt/kkolinko)
</fix>
+ <fix>
+ <bug>54732</bug>: Fix leak of statements in <code>StatementCache</code>
+ interceptor. (kkolinko)
+ </fix>
</changelog>
</subsection>
<subsection name="Other">
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