xtern commented on code in PR #1880: URL: https://github.com/apache/ignite-3/pull/1880#discussion_r1169992802
########## modules/jdbc/src/integrationTest/java/org/apache/ignite/jdbc/ItJdbcTransactionTest.java: ########## @@ -0,0 +1,307 @@ +/* + * 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; + +import static org.hamcrest.Matchers.containsString; +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertThrows; +import static org.junit.jupiter.api.Assertions.assertTrue; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.PreparedStatement; +import java.sql.ResultSet; +import java.sql.SQLException; +import java.sql.Statement; +import org.hamcrest.MatcherAssert; +import org.junit.jupiter.api.AfterEach; +import org.junit.jupiter.api.BeforeAll; +import org.junit.jupiter.api.Test; + +/** + * Verifies that SQL DML statements can use an explicit transaction using the jdbc API. + */ +public class ItJdbcTransactionTest extends AbstractJdbcSelfTest { + /** Insert query. */ + private static final String SQL_INSERT = "insert into TEST values (%d, '%s')"; + + /** Insert query for a prepared statement. */ + private static final String SQL_INSERT_PREPARED = "insert into TEST values (?, ?)"; + + @BeforeAll + public static void beforeClass() throws Exception { + try (Statement statement = conn.createStatement()) { + statement.executeUpdate("create table TEST(ID int primary key, NAME varchar(20));"); + } + } + + @AfterEach + public void afterEach() throws Exception { + try (Statement statement = conn.createStatement()) { + statement.executeUpdate("delete from TEST;"); + } + + conn.setAutoCommit(true); + } + + /** + * Tests {@link Connection#setAutoCommit(boolean)} and {@link Connection#getAutoCommit()} methods behaviour. + * <ul> + * <li>Auto-commit mode is enabled by default. + * <li>If {@code setAutoCommit} is called and the auto-commit mode is not changed, the call is a no-op. + * <li>If {@code setAutoCommit} is called during transaction and auto-commit mode changed then active transaction is committed. + * <li>Call to {@code setAutoCommit} or {@code getAutoCommit} on a closed connection throws exception. + * </ul> + * + * @throws SQLException If failed. + */ + @Test + public void testAutoCommitModeChange() throws SQLException { + try (Connection conn = DriverManager.getConnection(URL)) { + assertTrue(conn.getAutoCommit()); + conn.setAutoCommit(true); + + conn.setAutoCommit(false); + conn.setAutoCommit(false); + + int expRowsCount = 3; + String sqlUpdate = "insert into TEST (ID) values (1), (2), (3)"; + + try (Statement stmt = conn.createStatement()) { + conn.setAutoCommit(false); + + assertEquals(expRowsCount, stmt.executeUpdate(sqlUpdate)); + assertEquals(expRowsCount, rowsCount(conn)); + assertEquals(0, rowsCount(AbstractJdbcSelfTest.conn)); + + // Verify that switching to auto-commit mode again commits started transaction. + conn.setAutoCommit(true); + assertEquals(expRowsCount, rowsCount(AbstractJdbcSelfTest.conn)); + } + + conn.close(); + + // Exception when called on closed connection + checkConnectionClosed(conn::getAutoCommit); + checkConnectionClosed(() -> conn.setAutoCommit(true)); + checkConnectionClosed(() -> conn.setAutoCommit(false)); + } + } + + /** + * Tests {@link Connection#commit()} method behaviour. + * + * <p>Calling {@code commit} is expected to throw an exception if called in auto-commit mode or on a closed connection, + * + * @throws SQLException If failed. + */ + @Test + public void testCommit() throws Exception { + try (Connection conn = DriverManager.getConnection(URL)) { + SQLException ex = assertThrows(SQLException.class, conn::commit); + MatcherAssert.assertThat(ex.getMessage(), containsString("Transaction cannot be committed explicitly in auto-commit mode.")); + + conn.setAutoCommit(false); + conn.commit(); + + conn.close(); + + // Exception when called on closed connection + checkConnectionClosed(conn::commit); + } + } + + /** + * Tests {@link Connection#rollback()} method behaviour. + * + * <p>Calling {@code rollback} is expected to throw an exception if called in auto-commit mode or on a closed connection, + * + * @throws SQLException If failed. + */ + @Test + public void testRollback() throws Exception { + try (Connection conn = DriverManager.getConnection(URL)) { + // Should not be called in auto-commit mode + SQLException rollbackEx = assertThrows(SQLException.class, conn::rollback); + MatcherAssert.assertThat(rollbackEx.getMessage(), + containsString("Transaction cannot be rolled back explicitly in auto-commit mode.")); + + conn.setAutoCommit(false); + conn.rollback(); + + conn.close(); + + // Exception when called on closed connection + checkConnectionClosed(conn::rollback); + } + } + + /** + * Ensures that {@link Statement#executeUpdate(String)} supports explicit transaction. + * + * <p>It is expected that in non auto-commit mode, data updates can be rolled back and + * are invisible outside of an active transaction until they are committed. + * + * @throws Exception If failed. + */ + @Test + public void testExecuteUpdate() throws Exception { + try (Statement stmt = conn.createStatement()) { + checkUpdate(2, 1, (id, ignore) -> stmt.executeUpdate(String.format(SQL_INSERT, id, "name-" + id))); + } + } + + /** + * Ensures that {@link PreparedStatement#executeUpdate()} supports explicit transaction. + * + * <p>It is expected that in non auto-commit mode, data updates can be rolled back and + * are invisible outside of an active transaction until they are committed. + * + * @throws Exception If failed. + */ + @Test + public void testExecuteUpdatePrepared() throws Exception { + try (PreparedStatement pstmt = conn.prepareStatement(SQL_INSERT_PREPARED)) { + checkUpdate(2, 1, (id, ignore) -> { + pstmt.setInt(1, id); + pstmt.setString(2, "name-" + id); + + assertEquals(1, pstmt.executeUpdate()); + }); + } + } + + /** + * Ensures that {@link Statement#executeBatch()} supports explicit transaction. + * + * <p>It is expected that in non auto-commit mode, data updates can be rolled back and + * are invisible outside of an active transaction until they are committed. + * + * @throws Exception If failed. + */ + @Test + public void testBatch() throws Exception { + try (Statement stmt = conn.createStatement()) { + checkUpdate(5, 10, (off, cnt) -> { + for (int i = off; i < off + cnt; i++) { + stmt.addBatch(String.format(SQL_INSERT, i, "name-" + i)); + } + + stmt.executeBatch(); + }); + } + } + + /** + * Ensures that {@link PreparedStatement#executeBatch()} supports explicit transaction. + * + * <p>It is expected that in non auto-commit mode, data updates can be rolled back and + * are invisible outside of an active transaction until they are committed. + * + * @throws Exception If failed. + */ + @Test + public void testBatchPrepared() throws Exception { + try (PreparedStatement pstmt = conn.prepareStatement(SQL_INSERT_PREPARED)) { + checkUpdate(5, 10, (off, cnt) -> { + for (int i = off; i < off + cnt; i++) { + pstmt.setInt(1, i); + pstmt.setString(2, "name-" + i); + + pstmt.addBatch(); + } + + pstmt.executeBatch(); + }); + } + } + + /** + * Ensures that data updates made in an explicit transaction can be rolled back and are + * not visible outside of an active transaction until they are committed. + * + * @param ops Number of operations. + * @param rowsPerOp Number of rows per operation. + * @param batchOp Update operation. + * @throws SQLException If failed. + */ + private void checkUpdate(int ops, int rowsPerOp, BiConsumerX<Integer, Integer> batchOp) throws SQLException { + conn.setAutoCommit(false); + + // Check rollback. + checkTxResult(ops, rowsPerOp, batchOp, false); + + // Check commit. + checkTxResult(ops, rowsPerOp, batchOp, true); + } + + /** + * Performs update operations and checks the result of committing or rolling back a transaction. + * + * @param ops Number of operations. + * @param rowsPerOp Number of rows per operation. + * @param batchOp Update operation. + * @param commit {@code True} to check transaction commit, {@code false} to check rollback. + * @throws SQLException If failed. + */ + private void checkTxResult(int ops, int rowsPerOp, BiConsumerX<Integer, Integer> batchOp, boolean commit) throws SQLException { + // Creating another connection to ensure that the changes are not visible outside of the transaction. + try (Connection conn0 = DriverManager.getConnection(URL)) { Review Comment: Thanks, reworked a bit. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@ignite.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
