Package org.h2.util

Examples of org.h2.util.Task

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        String url = "jdbc:h2:" + getBaseDir() + "/fileLockSerialized";
        final String writeUrl = url + ";FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE";
        Connection conn = DriverManager.getConnection(writeUrl, "sa", "sa");
        conn.createStatement().execute("create table test(id identity) as select x from system_range(1, 100)");
        conn.close();
        Task task = new Task() {
            public void call() throws Exception {
                while (!stop) {
                    Thread.sleep(10);
                    Connection c = DriverManager.getConnection(writeUrl, "sa", "sa");
                    c.createStatement().execute("select * from test");
                    c.close();
                }
            }
        }.execute();
        Thread.sleep(20);
        for (int i = 0; i < 2; i++) {
            conn = DriverManager.getConnection(writeUrl, "sa", "sa");
            Statement stat = conn.createStatement();
            stat.execute("drop table test");
            stat.execute("create table test(id identity) as select x from system_range(1, 100)");
            conn.createStatement().execute("select * from test");
            conn.close();
        }
        Thread.sleep(100);
        conn = DriverManager.getConnection(writeUrl, "sa", "sa");
        conn.createStatement().execute("select * from test");
        conn.close();
        task.get();
    }
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        final String url = "jdbc:h2:" + getBaseDir() + "/fileLockSerialized" +
                ";FILE_LOCK=SERIALIZED" +
                ";OPEN_NEW=TRUE" +
                ";CACHE_SIZE=" + cacheSizeKb;
        final boolean[] importFinished = { false };
        final Task importUpdate = new Task() {
            public void call() throws Exception {
                Connection conn = DriverManager.getConnection(url);
                Statement stat = conn.createStatement();
                stat.execute("create table test(id int, id2 int)");
                for (int i = 0; i < howMuchRows; i++) {
                    stat.execute("insert into test values(" + i + ", " + i + ")");
                }
                importFinished[0] = true;
                Thread.sleep(5000);
                stat.execute("update test set id2=999 where id=500");
                conn.close();
                importFinished[0] = true;
            }
        };
        importUpdate.execute();

        Task select = new Task() {
            public void call() throws Exception {
                Connection conn = DriverManager.getConnection(url);
                Statement stat = conn.createStatement();
                while (!importFinished[0]) {
                    Thread.sleep(100);
                }
                Thread.sleep(1000);
                ResultSet rs = stat.executeQuery("select id2 from test where id=500");
                assertTrue(rs.next());
                assertEquals(500, rs.getInt(1));
                rs.close();
                importUpdate.get();
                Thread.sleep(1000);
                rs = stat.executeQuery("select id2 from test where id=500");
                assertTrue(rs.next());
                assertEquals(999, rs.getInt(1));
                rs.close();
                conn.close();
            }
        };
        select.execute();
        importUpdate.get();
        select.get();
        deleteDb("fileLockSerialized");
    }
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        stat.execute("script simple drop to '"+getBaseDir()+"/backup.sql'");
        stat.execute("set throttle 1000");
        // need to wait a bit (throttle is only used every 50 ms)
        Thread.sleep(200);
        final String dir = getBaseDir();
        Task task;
        task = new Task() {
            public void call() throws SQLException {
                stat.execute("script simple drop to '"+dir+"/backup2.sql'");
            }
        };
        task.execute();
        Thread.sleep(200);
        stat.cancel();
        SQLException e = (SQLException) task.getException();
        assertTrue(e != null);
        assertEquals(ErrorCode.STATEMENT_WAS_CANCELED, e.getErrorCode());

        stat.execute("set throttle 1000");
        // need to wait a bit (throttle is only used every 50 ms)
        Thread.sleep(100);

        task = new Task() {
            public void call() throws SQLException {
                stat.execute("runscript from '"+dir+"/backup.sql'");
            }
        };
        task.execute();
        Thread.sleep(100);
        stat.cancel();
        e = (SQLException) task.getException();
        assertEquals(ErrorCode.STATEMENT_WAS_CANCELED, e.getErrorCode());

        conn.close();
        IOUtils.delete(getBaseDir() + "/backup.sql");
        IOUtils.delete(getBaseDir() + "/backup2.sql");
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            throw new RuntimeException("Error starting task", t);
        }
    }

    private static void copyInThread(final InputStream in, final OutputStream out) {
        new Task() {
            public void call() throws IOException {
                while (true) {
                    int x = in.read();
                    if (x < 0) {
                        return;
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        assertEquals("Hallo", getSingleValue(s1, "SELECT NAME FROM TEST WHERE ID=1"));
        assertEquals("Hallo", getSingleValue(s2, "SELECT NAME FROM TEST WHERE ID=1"));

        s2.execute("UPDATE TEST SET NAME='H1' WHERE ID=1");
        Task task = new Task() {
            public void call() throws SQLException {
                s1.execute("UPDATE TEST SET NAME='H2' WHERE ID=1");
            }
        };
        task.execute();
        Thread.sleep(100);
        c2.commit();
        task.get();
        c1.commit();
        assertEquals("H2", getSingleValue(s1, "SELECT NAME FROM TEST WHERE ID=1"));
        assertEquals("H2", getSingleValue(s2, "SELECT NAME FROM TEST WHERE ID=1"));

        c1.close();
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        stat.execute("set exclusive false");
        Connection conn2 = getConnection("exclusive");
        final Statement stat2 = conn2.createStatement();
        stat.execute("set exclusive true");
        final AtomicInteger state = new AtomicInteger(0);
        Task task = new Task() {
            public void call() throws SQLException {
                stat2.execute("select * from dual");
                if (state.get() != 1) {
                    new Error("unexpected state: " + state.get()).printStackTrace();
                }
            }
        };
        task.execute();
        state.set(1);
        stat.execute("set exclusive false");
        task.get();
        stat.execute("set exclusive true");
        conn.close();

        // check that exclusive mode is off when disconnected
        stat2.execute("select * from dual");
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            final JdbcConnection c = conn;
            // PipedReader / PipedWriter are a lot slower
            // than PipedInputStream / PipedOutputStream
            // (Sun/Oracle Java 1.6.0_20)
            final PipedInputStream in = new PipedInputStream();
            final Task task = new Task() {
                public void call() {
                    value = c.createClob(IOUtils.getReader(in), -1);
                }
            };
            PipedOutputStream out = new PipedOutputStream(in) {
                public void close() throws IOException {
                    super.close();
                    try {
                        task.get();
                    } catch (Exception e) {
                        throw DbException.convertToIOException(e);
                    }
                }
            };
            task.execute();
            return IOUtils.getBufferedWriter(out);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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            final JdbcConnection c = conn;
            // PipedReader / PipedWriter are a lot slower
            // than PipedInputStream / PipedOutputStream
            // (Sun/Oracle Java 1.6.0_20)
            final PipedInputStream in = new PipedInputStream();
            final Task task = new Task() {
                public void call() {
                    value = c.createClob(IOUtils.getReader(in), -1);
                }
            };
            PipedOutputStream out = new PipedOutputStream(in) {
                public void close() throws IOException {
                    super.close();
                    try {
                        task.get();
                    } catch (Exception e) {
                        throw DbException.convertToIOException(e);
                    }
                }
            };
            task.execute();
            return IOUtils.getBufferedWriter(out);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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            if (value.getPrecision() != 0) {
                throw DbException.getInvalidValueException("length", value.getPrecision());
            }
            final JdbcConnection c = conn;
            final PipedInputStream in = new PipedInputStream();
            final Task task = new Task() {
                public void call() {
                    value = c.createBlob(in, -1);
                }
            };
            PipedOutputStream out = new PipedOutputStream(in) {
                public void close() throws IOException {
                    super.close();
                    try {
                        task.get();
                    } catch (Exception e) {
                        throw DbException.convertToIOException(e);
                    }
                }
            };
            task.execute();
            return new BufferedOutputStream(out);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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            final JdbcConnection c = conn;
            // PipedReader / PipedWriter are a lot slower
            // than PipedInputStream / PipedOutputStream
            // (Sun/Oracle Java 1.6.0_20)
            final PipedInputStream in = new PipedInputStream();
            final Task task = new Task() {
                public void call() {
                    value = c.createClob(IOUtils.getReader(in), -1);
                }
            };
            PipedOutputStream out = new PipedOutputStream(in) {
                public void close() throws IOException {
                    super.close();
                    try {
                        task.get();
                    } catch (Exception e) {
                        throw DbException.convertToIOException(e);
                    }
                }
            };
            task.execute();
            return IOUtils.getBufferedWriter(out);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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