Examples with ValueLobDb org.h2.value.ValueLobDb used on opensource projects

Example 1 with ValueLobDb

use of org.h2.value.ValueLobDb in project h2database by h2database.

the class LobStorageBackend method copyLob.

@Override
public ValueLobDb copyLob(ValueLobDb old, int tableId, long length) {
    int type = old.getType();
    long oldLobId = old.getLobId();
    assertNotHolds(conn.getSession());
    // see locking discussion at the top
    synchronized (database) {
        synchronized (conn.getSession()) {
            try {
                init();
                ValueLobDb v = null;
                if (!old.isRecoveryReference()) {
                    long lobId = getNextLobId();
                    String sql = "INSERT INTO " + LOB_MAP + "(LOB, SEQ, POS, HASH, BLOCK) " + "SELECT ?, SEQ, POS, HASH, BLOCK FROM " + LOB_MAP + " WHERE LOB = ?";
                    PreparedStatement prep = prepare(sql);
                    prep.setLong(1, lobId);
                    prep.setLong(2, oldLobId);
                    prep.executeUpdate();
                    reuse(sql, prep);
                    sql = "INSERT INTO " + LOBS + "(ID, BYTE_COUNT, TABLE) " + "SELECT ?, BYTE_COUNT, ? FROM " + LOBS + " WHERE ID = ?";
                    prep = prepare(sql);
                    prep.setLong(1, lobId);
                    prep.setLong(2, tableId);
                    prep.setLong(3, oldLobId);
                    prep.executeUpdate();
                    reuse(sql, prep);
                    v = ValueLobDb.create(type, database, tableId, lobId, null, length);
                } else {
                    // Recovery process, no need to copy LOB using normal
                    // infrastructure
                    v = ValueLobDb.create(type, database, tableId, oldLobId, null, length);
                }
                return v;
            } catch (SQLException e) {
                throw DbException.convert(e);
            }
        }
    }
}

Example 2 with ValueLobDb

use of org.h2.value.ValueLobDb in project h2database by h2database.

the class LobStorageMap method createLob.

private ValueLobDb createLob(InputStream in, int type) throws IOException {
    byte[] streamStoreId;
    try {
        streamStoreId = streamStore.put(in);
    } catch (Exception e) {
        throw DbException.convertToIOException(e);
    }
    long lobId = generateLobId();
    long length = streamStore.length(streamStoreId);
    int tableId = LobStorageFrontend.TABLE_TEMP;
    Object[] value = { streamStoreId, tableId, length, 0 };
    lobMap.put(lobId, value);
    Object[] key = { streamStoreId, lobId };
    refMap.put(key, Boolean.TRUE);
    ValueLobDb lob = ValueLobDb.create(type, database, tableId, lobId, null, length);
    if (TRACE) {
        trace("create " + tableId + "/" + lobId);
    }
    return lob;
}

Example 3 with ValueLobDb

use of org.h2.value.ValueLobDb in project h2database by h2database.

the class LobStorageMap method createClob.

@Override
public Value createClob(Reader reader, long maxLength) {
    init();
    int type = Value.CLOB;
    try {
        // we multiple by 3 here to get the worst-case size in bytes
        if (maxLength != -1 && maxLength * 3 <= database.getMaxLengthInplaceLob()) {
            char[] small = new char[(int) maxLength];
            int len = IOUtils.readFully(reader, small, (int) maxLength);
            if (len > maxLength) {
                throw new IllegalStateException("len > blobLength, " + len + " > " + maxLength);
            }
            byte[] utf8 = new String(small, 0, len).getBytes(StandardCharsets.UTF_8);
            if (utf8.length > database.getMaxLengthInplaceLob()) {
                throw new IllegalStateException("len > maxinplace, " + utf8.length + " > " + database.getMaxLengthInplaceLob());
            }
            return ValueLobDb.createSmallLob(type, utf8);
        }
        if (maxLength < 0) {
            maxLength = Long.MAX_VALUE;
        }
        CountingReaderInputStream in = new CountingReaderInputStream(reader, maxLength);
        ValueLobDb lob = createLob(in, type);
        // the length is not correct
        lob = ValueLobDb.create(type, database, lob.getTableId(), lob.getLobId(), null, in.getLength());
        return lob;
    } catch (IllegalStateException e) {
        throw DbException.get(ErrorCode.OBJECT_CLOSED, e);
    } catch (IOException e) {
        throw DbException.convertIOException(e, null);
    }
}

Example 4 with ValueLobDb

use of org.h2.value.ValueLobDb in project h2database by h2database.

the class LobStorageMap method copyLob.

@Override
public ValueLobDb copyLob(ValueLobDb old, int tableId, long length) {
    init();
    int type = old.getType();
    long oldLobId = old.getLobId();
    long oldLength = old.getPrecision();
    if (oldLength != length) {
        throw DbException.throwInternalError("Length is different");
    }
    Object[] value = lobMap.get(oldLobId);
    value = value.clone();
    byte[] streamStoreId = (byte[]) value[0];
    long lobId = generateLobId();
    value[1] = tableId;
    lobMap.put(lobId, value);
    Object[] key = { streamStoreId, lobId };
    refMap.put(key, Boolean.TRUE);
    ValueLobDb lob = ValueLobDb.create(type, database, tableId, lobId, null, length);
    if (TRACE) {
        trace("copy " + old.getTableId() + "/" + old.getLobId() + " > " + tableId + "/" + lobId);
    }
    return lob;
}

Example 5 with ValueLobDb

use of org.h2.value.ValueLobDb in project h2database by h2database.

the class TcpServerThread method writeValue.

private void writeValue(Value v) throws IOException {
    if (v.getType() == Value.CLOB || v.getType() == Value.BLOB) {
        if (v instanceof ValueLobDb) {
            ValueLobDb lob = (ValueLobDb) v;
            if (lob.isStored()) {
                long id = lob.getLobId();
                lobs.put(id, new CachedInputStream(null));
            }
        }
    }
    transfer.writeValue(v);
}