modules/clients/src/test/java/org/apache/ignite/jdbc/thin/JdbcThinPreparedStatementLeakTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.jdbc.thin;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Properties;
import java.util.Set;
import org.apache.ignite.IgniteJdbcThinDriver;
import org.apache.ignite.internal.util.typedef.internal.U;
import org.junit.Test;

/**
 * Prepared statement leaks test.
 */
@SuppressWarnings("ThrowableNotThrown")
public class JdbcThinPreparedStatementLeakTest extends JdbcThinAbstractSelfTest {
    /** URL. */
    private static final String URL = "jdbc:ignite:thin://127.0.0.1/";


    /** {@inheritDoc} */
    @Override protected void beforeTest() throws Exception {
        super.beforeTest();

        startGrid();
    }

    /** {@inheritDoc} */
    @Override protected void afterTest() throws Exception {
        stopAllGrids();

        super.afterTest();
    }

    /**
     * @throws Exception If failed.
     */
    @SuppressWarnings("StatementWithEmptyBody")
    @Test
    public void test() throws Exception {
        try (Connection conn = new IgniteJdbcThinDriver().connect(URL, new Properties())) {
            for (int i = 0; i < 50000; ++i) {
                try (PreparedStatement st = conn.prepareStatement("select 1")) {
                    ResultSet rs = st.executeQuery();

                    while (rs.next()) {
                        // No-op.
                    }

                    rs.close();
                }
            }

            Set stmts = U.field(conn, "stmts");

            assertEquals(0, stmts.size());
        }
    }
}