Issue#556 close connections in tests (at least in case of successful execution)

h2/src/test/org/h2/test/db/TestFullText.java

@@ -92,7 +92,7 @@ public class TestFullText extends TestBase {
 
     private static void close(Collection<Connection> list) throws SQLException {
         for (Connection conn : list) {
-            conn.close();
+            try { conn.close(); } catch (SQLException ignore) {/**/}
         }
     }
 
@@ -491,8 +491,7 @@ public class TestFullText extends TestBase {
             return;
         }
         deleteDb("fullText");
-        ArrayList<Connection> connList = new ArrayList<Connection>();
-        Connection conn = getConnection("fullText", connList);
+        Connection conn = getConnection("fullText");
         String prefix = lucene ? "FTL_" : "FT_";
         Statement stat = conn.createStatement();
         String className = lucene ? "FullTextLucene" : "FullText";
@@ -590,15 +589,15 @@ public class TestFullText extends TestBase {
 
         if (!config.memory) {
             conn.close();
+            conn = getConnection("fullText");
         }
 
-        conn = getConnection("fullText", connList);
         stat = conn.createStatement();
         stat.executeQuery("SELECT * FROM " + prefix + "SEARCH('World', 0, 0)");
 
         stat.execute("CALL " + prefix + "DROP_ALL()");
 
-        close(connList);
+        conn.close();
     }
 
     private void testDropIndex(boolean lucene) throws SQLException {
@@ -625,7 +624,6 @@ public class TestFullText extends TestBase {
                 "_CREATE_INDEX('PUBLIC', 'TEST', 'NAME1, NAME2')");
         stat.execute("UPDATE TEST SET NAME2=NULL WHERE ID=1");
         stat.execute("UPDATE TEST SET NAME2='Hello World' WHERE ID=1");
-        conn.close();
 
         conn.close();
         FileUtils.deleteRecursive(getBaseDir() + "/fullTextDropIndex", false);

h2/src/test/org/h2/test/db/TestFunctions.java

@@ -1285,6 +1285,7 @@ public class TestFunctions extends TestBase implements AggregateFunction {
                 String.format("SELECT ORA_HASH('%s', 0) FROM DUAL", testStr));
         assertResult(String.valueOf("foo".hashCode()), stat,
                 String.format("SELECT ORA_HASH('%s', 0, 0) FROM DUAL", testStr));
+        conn.close();
     }
 
     private void testToDateException() {
@@ -2058,6 +2059,7 @@ public class TestFunctions extends TestBase implements AggregateFunction {
 
         assertFalse(parsed.before(before));
         assertFalse(parsed.after(after));
+        conn.close();
     }
 
 
@@ -2083,6 +2085,7 @@ public class TestFunctions extends TestBase implements AggregateFunction {
         rs.close();
 
         assertEquals(first, second);
+        conn.close();
     }
 
     private void testThatCurrentTimestampUpdatesOutsideATransaction()
@@ -2107,11 +2110,12 @@ public class TestFunctions extends TestBase implements AggregateFunction {
         rs.close();
 
         assertTrue(second.after(first));
+        conn.close();
     }
 
     private void callCompiledFunction(String functionName) throws SQLException {
         deleteDb("functions");
-        Connection conn = getConnection("functions");
+        try (Connection conn = getConnection("functions")) {
             Statement stat = conn.createStatement();
             ResultSet rs;
             stat.execute("create alias " + functionName + " AS "
@@ -2125,8 +2129,7 @@ public class TestFunctions extends TestBase implements AggregateFunction {
             assertEquals(Boolean.class.getName(), rs.getObject(1).getClass().getName());
 
             stat.execute("drop alias " + functionName + "");
-
-        conn.close();
+        }
     }
 
     private void assertCallResult(String expected, Statement stat, String sql)

h2/src/test/org/h2/test/db/TestMultiThread.java

@@ -38,20 +38,15 @@ public class TestMultiThread extends TestBase implements Runnable {
     private boolean stop;
     private TestMultiThread parent;
     private Random random;
-    private Connection threadConn;
-    private Statement threadStat;
 
     public TestMultiThread() {
         // nothing to do
     }
 
-    private TestMultiThread(TestAll config, TestMultiThread parent)
-            throws SQLException {
+    private TestMultiThread(TestAll config, TestMultiThread parent) {
         this.config = config;
         this.parent = parent;
         random = new Random();
-        threadConn = getConnection();
-        threadStat = threadConn.createStatement();
     }
 
     /**
@@ -81,7 +76,7 @@ public class TestMultiThread extends TestBase implements Runnable {
         String db = getTestName();
         deleteDb(db);
         final String url = getURL(db + ";MULTI_THREADED=1;LOCK_TIMEOUT=10000", true);
-        Connection conn = getConnection(url);
+        try (Connection conn = getConnection(url)) {
             Task[] tasks = new Task[2];
             for (int i = 0; i < tasks.length; i++) {
                 final int x = i;
@@ -105,14 +100,14 @@ public class TestMultiThread extends TestBase implements Runnable {
             for (Task t : tasks) {
                 t.get();
             }
-        conn.close();
+        }
     }
 
     private void testConcurrentLobAdd() throws Exception {
         String db = getTestName();
         deleteDb(db);
         final String url = getURL(db + ";MULTI_THREADED=1", true);
-        Connection conn = getConnection(url);
+        try (Connection conn = getConnection(url)) {
             Statement stat = conn.createStatement();
             stat.execute("create table test(id identity, data clob)");
             Task[] tasks = new Task[2];
@@ -138,7 +133,7 @@ public class TestMultiThread extends TestBase implements Runnable {
             for (Task t : tasks) {
                 t.get();
             }
-        conn.close();
+        }
     }
 
     private void testConcurrentView() throws Exception {
@@ -149,7 +144,7 @@ public class TestMultiThread extends TestBase implements Runnable {
         deleteDb(db);
         final String url = getURL(db + ";MULTI_THREADED=1", true);
         final Random r = new Random();
-        Connection conn = getConnection(url);
+        try (Connection conn = getConnection(url)) {
             Statement stat = conn.createStatement();
             StringBuilder buff = new StringBuilder();
             buff.append("create table test(id int");
@@ -180,12 +175,12 @@ public class TestMultiThread extends TestBase implements Runnable {
             }
             t.get();
             SynchronizedVerifier.setDetect(SmallLRUCache.class, false);
-        conn.close();
+        }
     }
 
     private void testConcurrentAlter() throws Exception {
         deleteDb(getTestName());
-        final Connection conn = getConnection(getTestName());
+        try (final Connection conn = getConnection(getTestName())) {
             Statement stat = conn.createStatement();
             Task t = new Task() {
                 @Override
@@ -202,7 +197,7 @@ public class TestMultiThread extends TestBase implements Runnable {
                 stat.execute("alter table test drop column x");
             }
             t.get();
-        conn.close();
+        }
     }
 
     private void testConcurrentAnalyze() throws Exception {
@@ -211,19 +206,18 @@ public class TestMultiThread extends TestBase implements Runnable {
         }
         deleteDb(getTestName());
         final String url = getURL("concurrentAnalyze;MULTI_THREADED=1", true);
-        Connection conn = getConnection(url);
+        try (Connection conn = getConnection(url)) {
             Statement stat = conn.createStatement();
             stat.execute("create table test(id bigint primary key) " +
                     "as select x from system_range(1, 1000)");
             Task t = new Task() {
                 @Override
                 public void call() throws SQLException {
-                Connection conn2;
-                conn2 = getConnection(url);
+                    try (Connection conn2 = getConnection(url)) {
                         for (int i = 0; i < 1000; i++) {
                             conn2.createStatement().execute("analyze");
                         }
-                conn2.close();
+                    }
                 }
             };
             t.execute();
@@ -237,9 +231,9 @@ public class TestMultiThread extends TestBase implements Runnable {
     }
 
     private void testConcurrentInsertUpdateSelect() throws Exception {
-        threadConn = getConnection();
-        threadStat = threadConn.createStatement();
-        threadStat.execute("CREATE TABLE TEST(ID IDENTITY, NAME VARCHAR)");
+        try (Connection conn = getConnection()) {
+            Statement stmt = conn.createStatement();
+            stmt.execute("CREATE TABLE TEST(ID IDENTITY, NAME VARCHAR)");
             int len = getSize(10, 200);
             Thread[] threads = new Thread[len];
             for (int i = 0; i < len; i++) {
@@ -254,10 +248,10 @@ public class TestMultiThread extends TestBase implements Runnable {
             for (int i = 0; i < len; i++) {
                 threads[i].join();
             }
-        ResultSet rs = threadStat.executeQuery("SELECT COUNT(*) FROM TEST");
+            ResultSet rs = stmt.executeQuery("SELECT COUNT(*) FROM TEST");
             rs.next();
             trace("max id=" + rs.getInt(1));
-        threadConn.close();
+        }
     }
 
     private Connection getConnection() throws SQLException {
@@ -266,22 +260,22 @@ public class TestMultiThread extends TestBase implements Runnable {
 
     @Override
     public void run() {
-        try {
+        try (Connection conn = getConnection()) {
+            Statement stmt = conn.createStatement();
             while (!parent.stop) {
-                threadStat.execute("SELECT COUNT(*) FROM TEST");
-                threadStat.execute("INSERT INTO TEST VALUES(NULL, 'Hi')");
-                PreparedStatement prep = threadConn.prepareStatement(
+                stmt.execute("SELECT COUNT(*) FROM TEST");
+                stmt.execute("INSERT INTO TEST VALUES(NULL, 'Hi')");
+                PreparedStatement prep = conn.prepareStatement(
                         "UPDATE TEST SET NAME='Hello' WHERE ID=?");
                 prep.setInt(1, random.nextInt(10000));
                 prep.execute();
-                prep = threadConn.prepareStatement("SELECT * FROM TEST WHERE ID=?");
+                prep = conn.prepareStatement("SELECT * FROM TEST WHERE ID=?");
                 prep.setInt(1, random.nextInt(10000));
                 ResultSet rs = prep.executeQuery();
                 while (rs.next()) {
                     rs.getString("NAME");
                 }
             }
-            threadConn.close();
         } catch (Exception e) {
             logError("multi", e);
         }
@@ -292,11 +286,11 @@ public class TestMultiThread extends TestBase implements Runnable {
         // is not supported
         deleteDb("lockMode");
         final String url = getURL("lockMode;MULTI_THREADED=1", true);
-        Connection conn = getConnection(url);
+        try (Connection conn = getConnection(url)) {
             DatabaseMetaData meta = conn.getMetaData();
             assertFalse(meta.supportsTransactionIsolationLevel(
                     Connection.TRANSACTION_READ_UNCOMMITTED));
-        conn.close();
+        }
         deleteDb("lockMode");
     }
 
@@ -307,8 +301,10 @@ public class TestMultiThread extends TestBase implements Runnable {
         final String url = getURL("lockMode;MULTI_THREADED=1", true);
 
         // create some common tables and views
-        final Connection conn = getConnection(url);
-        final Statement stat = conn.createStatement();
+        ExecutorService executor = Executors.newFixedThreadPool(8);
+        Connection conn = getConnection(url);
+        try {
+            Statement stat = conn.createStatement();
             stat.execute(
                     "CREATE TABLE INVOICE(INVOICE_ID INT PRIMARY KEY, AMOUNT DECIMAL)");
             stat.execute("CREATE VIEW INVOICE_VIEW as SELECT * FROM INVOICE");
@@ -322,15 +318,13 @@ public class TestMultiThread extends TestBase implements Runnable {
             stat.close();
 
             // create views that reference the common views in different threads
-        final ExecutorService executor = Executors.newFixedThreadPool(8);
-        try {
-            final ArrayList<Future<Void>> jobs = new ArrayList<Future<Void>>();
+            ArrayList<Future<Void>> jobs = new ArrayList<Future<Void>>();
             for (int i = 0; i < 1000; i++) {
                 final int j = i;
                 jobs.add(executor.submit(new Callable<Void>() {
                     @Override
                     public Void call() throws Exception {
-                        final Connection conn2 = getConnection(url);
+                        try (Connection conn2 = getConnection(url)) {
                             Statement stat2 = conn2.createStatement();
 
                             stat2.execute("CREATE VIEW INVOICE_VIEW" + j
@@ -354,8 +348,8 @@ public class TestMultiThread extends TestBase implements Runnable {
                             rs.next();
                             rs.close();
 
-                        stat.close();
-                        conn.close();
+                            stat2.close();
+                        }
                         return null;
                     }
                 }));
@@ -388,37 +382,36 @@ public class TestMultiThread extends TestBase implements Runnable {
         deleteDb("lockMode");
 
         final String url = getURL("lockMode;MULTI_THREADED=1", true);
-        final Connection conn = getConnection(url);
+        int threadCount = 25;
+        ExecutorService executor = Executors.newFixedThreadPool(threadCount);
+        Connection conn = getConnection(url);
+        try {
             conn.createStatement().execute(
                     "CREATE TABLE IF NOT EXISTS TRAN (ID NUMBER(18,0) not null PRIMARY KEY)");
 
-        final int threadCount = 25;
             final ArrayList<Callable<Void>> callables = new ArrayList<Callable<Void>>();
             for (int i = 0; i < threadCount; i++) {
-            final Connection taskConn = getConnection(url);
-            taskConn.setAutoCommit(false);
-            final PreparedStatement insertTranStmt = taskConn
-                    .prepareStatement("INSERT INTO tran (id) values(?)");
-            // to guarantee uniqueness
                 final long initialTransactionId = i * 1000000L;
                 callables.add(new Callable<Void>() {
                     @Override
                     public Void call() throws Exception {
+                        try (Connection taskConn = getConnection(url)) {
+                            taskConn.setAutoCommit(false);
+                            PreparedStatement insertTranStmt = taskConn
+                                    .prepareStatement("INSERT INTO tran (id) VALUES(?)");
+                            // to guarantee uniqueness
                             long tranId = initialTransactionId;
                             for (int j = 0; j < 1000; j++) {
                                 insertTranStmt.setLong(1, tranId++);
                                 insertTranStmt.execute();
                                 taskConn.commit();
                             }
-                    taskConn.close();
+                        }
                         return null;
                     }
                 });
             }
 
-        final ExecutorService executor = Executors
-                .newFixedThreadPool(threadCount);
-        try {
             final ArrayList<Future<Void>> jobs = new ArrayList<Future<Void>>();
             for (int i = 0; i < threadCount; i++) {
                 jobs.add(executor.submit(callables.get(i)));
@@ -441,7 +434,10 @@ public class TestMultiThread extends TestBase implements Runnable {
 
         final int objectCount = 10000;
         final String url = getURL("lockMode;MULTI_THREADED=1;LOCK_TIMEOUT=10000", true);
-        final Connection conn = getConnection(url);
+        int threadCount = 25;
+        ExecutorService executor = Executors.newFixedThreadPool(threadCount);
+        Connection conn = getConnection(url);
+        try {
             conn.createStatement().execute(
                     "CREATE TABLE IF NOT EXISTS ACCOUNT" +
                     "(ID NUMBER(18,0) not null PRIMARY KEY, BALANCE NUMBER null)");
@@ -453,30 +449,27 @@ public class TestMultiThread extends TestBase implements Runnable {
                 mergeAcctStmt.execute();
             }
 
-        final int threadCount = 25;
             final ArrayList<Callable<Void>> callables = new ArrayList<Callable<Void>>();
             for (int i = 0; i < threadCount; i++) {
-            final Connection taskConn = getConnection(url);
-            taskConn.setAutoCommit(false);
-            final PreparedStatement updateAcctStmt = taskConn
-                    .prepareStatement("UPDATE account set balance = ? where id = ?");
                 callables.add(new Callable<Void>() {
                     @Override
                     public Void call() throws Exception {
+                        try (Connection taskConn = getConnection(url)) {
+                            taskConn.setAutoCommit(false);
+                            final PreparedStatement updateAcctStmt = taskConn
+                                    .prepareStatement("UPDATE account SET balance = ? WHERE id = ?");
                             for (int j = 0; j < 1000; j++) {
                                 updateAcctStmt.setDouble(1, Math.random());
                                 updateAcctStmt.setLong(2, (int) (Math.random() * objectCount));
                                 updateAcctStmt.execute();
                                 taskConn.commit();
                             }
-                    taskConn.close();
+                        }
                         return null;
                     }
                 });
             }
 
-        final ExecutorService executor = Executors.newFixedThreadPool(threadCount);
-        try {
             final ArrayList<Future<Void>> jobs = new ArrayList<Future<Void>>();
             for (int i = 0; i < threadCount; i++) {
                 jobs.add(executor.submit(callables.get(i)));

h2/src/test/org/h2/test/db/TestQueryCache.java

@@ -36,7 +36,7 @@ public class TestQueryCache extends TestBase {
     }
 
     private void test1() throws Exception {
-        Connection conn = getConnection("queryCache;QUERY_CACHE_SIZE=10");
+        try (Connection conn = getConnection("queryCache;QUERY_CACHE_SIZE=10")) {
             Statement stat = conn.createStatement();
             stat.execute("create table test(id int, name varchar)");
             PreparedStatement prep;
@@ -91,11 +91,11 @@ public class TestQueryCache extends TestBase {
             // usually this is true
             assertSmaller(firstSmaller, firstGreater);
             stat.execute("drop table test");
-        conn.close();
+        }
     }
 
     private void testClearingCacheWithTableStructureChanges() throws Exception {
-        Connection conn = getConnection("queryCache;QUERY_CACHE_SIZE=10");
+        try (Connection conn = getConnection("queryCache;QUERY_CACHE_SIZE=10")) {
             assertThrows(ErrorCode.TABLE_OR_VIEW_NOT_FOUND_1, conn).
                     prepareStatement("SELECT * FROM TEST");
             Statement stat = conn.createStatement();
@@ -105,6 +105,6 @@ public class TestQueryCache extends TestBase {
             stat.executeUpdate("DROP TABLE TEST");
             assertThrows(ErrorCode.TABLE_OR_VIEW_NOT_FOUND_1, conn).
                     prepareStatement("SELECT * FROM TEST");
-        conn.close();
+        }
     }
 }

h2/src/test/org/h2/test/db/TestShow.java

@@ -33,7 +33,7 @@ public class TestShow extends TestBase {
     }
 
     private void testPgCompatibility() throws SQLException {
-        Connection conn = getConnection("mem:pg");
+        try (Connection conn = getConnection("mem:pg")) {
             Statement stat = conn.createStatement();
 
             assertResult("UNICODE", stat, "SHOW CLIENT_ENCODING");
@@ -43,9 +43,10 @@ public class TestShow extends TestBase {
             assertResult("8.1.4", stat, "SHOW SERVER_VERSION");
             assertResult("UTF8", stat, "SHOW SERVER_ENCODING");
         }
+    }
 
     private void testMysqlCompatibility() throws SQLException {
-        Connection conn = getConnection("mem:pg");
+        try (Connection conn = getConnection("mem:pg")) {
             Statement stat = conn.createStatement();
             ResultSet rs;
 
@@ -63,4 +64,5 @@ public class TestShow extends TestBase {
             // columns
             assertResultRowCount(2, stat.executeQuery("SHOW COLUMNS FROM person"));
         }
+    }
 }

h2/src/test/org/h2/test/db/TestSpatial.java

@@ -1064,7 +1064,7 @@ public class TestSpatial extends TestBase {
 
     private void testInsertNull() throws SQLException {
         deleteDb("spatial");
-        Connection conn = getConnection(URL);
+        try (Connection conn = getConnection(URL)) {
             Statement stat = conn.createStatement();
             stat.execute("\n" +
                 "drop table if exists PUBLIC.DUMMY_12;\n" +
@@ -1137,12 +1137,13 @@ public class TestSpatial extends TestBase {
             try (ResultSet rs = stat.executeQuery("select * from DUMMY_12")) {
                 assertTrue(rs.next());
             }
-
+        }
+        deleteDb("spatial");
     }
 
     private void testSpatialIndexWithOrder() throws SQLException {
         deleteDb("spatial");
-        Connection conn = getConnection(URL);
+        try (Connection conn = getConnection(URL)) {
             Statement stat = conn.createStatement();
             stat.execute("DROP TABLE IF EXISTS BUILDINGS;" +
                    "CREATE TABLE BUILDINGS (PK serial, THE_GEOM geometry);" +
@@ -1156,4 +1157,6 @@ public class TestSpatial extends TestBase {
                 assertTrue(rs.getString(1).contains("PRIMARY_KEY"));
             }
         }
+        deleteDb("spatial");
+    }
 }

h2/src/test/org/h2/test/jdbc/TestConnection.java

@@ -45,6 +45,7 @@ public class TestConnection extends TestBase {
 
         assertThrows(SQLClientInfoException.class, conn).setClientInfo("numServers", "SomeValue");
         assertThrows(SQLClientInfoException.class, conn).setClientInfo("server23", "SomeValue");
+        conn.close();
     }
 
     private void testSetUnsupportedClientInfoProperties() throws SQLException {
@@ -54,6 +55,7 @@ public class TestConnection extends TestBase {
         properties.put("ClientUser", "someUser");
 
         assertThrows(SQLClientInfoException.class, conn).setClientInfo(properties);
+        conn.close();
     }
 
     private void testSetSupportedClientInfoProperties() throws SQLException {
@@ -67,6 +69,7 @@ public class TestConnection extends TestBase {
         assertNull(conn.getClientInfo("ApplicationName"));
         // new property has been set
         assertEquals(conn.getClientInfo("ClientUser"), "someUser");
+        conn.close();
     }
 
     private void testSetSupportedClientInfo() throws SQLException {
@@ -74,17 +77,20 @@ public class TestConnection extends TestBase {
         conn.setClientInfo("ApplicationName", "Connection Test");
 
         assertEquals(conn.getClientInfo("ApplicationName"), "Connection Test");
+        conn.close();
     }
 
     private void testSetUnsupportedClientInfo() throws SQLException {
         Connection conn = getConnection("clientInfoDB2;MODE=DB2");
         assertThrows(SQLClientInfoException.class, conn).setClientInfo(
                 "UnsupportedName", "SomeValue");
+        conn.close();
     }
 
     private void testGetUnsupportedClientInfo() throws SQLException {
         Connection conn = getConnection("clientInfo");
         assertNull(conn.getClientInfo("UnknownProperty"));
+        conn.close();
     }
 
     private void testSetGetSchema() throws SQLException {