remove file accidentally committed

h2/src/test/TestMultiThreadingH2.java

-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.sql.Connection;
-import java.sql.DriverManager;
-import java.sql.ResultSet;
-import java.sql.Statement;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.TimeUnit;
-
-public class TestMultiThreadingH2 {
-
-    private static final String JDBC_URL = "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1;MULTI_THREADED=1;";
-
-    public static void main(String[] args) throws Exception {
-        Class.forName("org.h2.Driver");
-
-        // create some common tables and views
-        final Connection conn = DriverManager.getConnection(JDBC_URL, "sa", "");
-        final 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");
-
-        stat.execute(
-                "CREATE TABLE INVOICE_DETAIL(DETAIL_ID INT PRIMARY KEY, INVOICE_ID INT, DESCRIPTION VARCHAR)");
-        stat.execute(
-                "CREATE VIEW INVOICE_DETAIL_VIEW as SELECT * FROM INVOICE_DETAIL");
-
-        stat.close();
-        conn.close();
-
-        // create views that reference the common views in different threads
-        ExecutorService executor = Executors.newFixedThreadPool(8);
-        for (int i = 0; i < 30000; i++) {
-            final int j = i;
-            executor.execute(new Runnable() {
-                @Override
-                public void run() {
-                    try {
-                        Connection conn2 = DriverManager.getConnection(JDBC_URL,
-                                "sa", "");
-                        Statement stat2 = conn2.createStatement();
-
-                        stat2.execute("CREATE VIEW INVOICE_VIEW" + j
-                                + " as SELECT * FROM INVOICE_VIEW");
-
-                        // the following query intermittently results in a
-                        // NullPointerException
-                        stat2.execute("CREATE VIEW INVOICE_DETAIL_VIEW" + j
-                                + " as SELECT DTL.* FROM INVOICE_VIEW" + j
-                                + " INV JOIN INVOICE_DETAIL_VIEW DTL ON INV.INVOICE_ID = DTL.INVOICE_ID"
-                                + " WHERE DESCRIPTION='TEST'");
-
-                        ResultSet rs = stat2
-                                .executeQuery("SELECT * FROM INVOICE_VIEW" + j);
-                        rs.next();
-                        rs.close();
-
-                        rs = stat2.executeQuery(
-                                "SELECT * FROM INVOICE_DETAIL_VIEW" + j);
-                        rs.next();
-                        rs.close();
-
-                        stat.close();
-                        conn.close();
-
-                    } catch (Exception ex) {
-                        System.out.println("exception at iteration " + j + ":\n"
-                                + getStackTrace(ex) + "\n");
-                    }
-                }
-            });
-        }
-
-        executor.shutdown();
-        try {
-            executor.awaitTermination(24, TimeUnit.HOURS);
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
-
-    }
-
-    /**
-     * Utility method to get a stacktrace from a string.
-     */
-    public static String getStackTrace(Throwable t) {
-        StringWriter stringWriter = new StringWriter();
-        t.printStackTrace(new PrintWriter(stringWriter));
-        return stringWriter.toString();
-    }
-
-}