Examples of com.caucho.db.xa.Transaction

com.caucho.db.xa.Transaction
Represents a single transaction.

   * Rebuilds the indexes
   */
  private void rebuildIndexes()
    throws IOException, SQLException
  {
    Transaction xa = Transaction.create();
    xa.setAutoCommit(true);


    try {
      TableIterator iter = createTableIterator();


      iter.init(xa);


      Column []columns = _row.getColumns();


      while (iter.nextBlock()) {
        iter.initRow();


        byte []blockBuffer = iter.getBuffer();


        while (iter.nextRow()) {
          try {
            long rowAddress = iter.getRowAddress();
            int rowOffset = iter.getRowOffset();


            for (int i = 0; i < columns.length; i++) {
              Column column = columns[i];


              /*
              if (column.getIndex() != null)
                System.out.println(Long.toHexString(iter.getBlock().getBlockId()) + ":" + Long.toHexString(rowAddress) + ":" + Long.toHexString(rowOffset) + ": " + column.getIndexKeyCompare().toString(blockBuffer, rowOffset + column.getColumnOffset(), column.getLength()));
              */


              column.setIndex(xa, blockBuffer, rowOffset, rowAddress, null);
            }
          } catch (Exception e) {
            log.log(Level.WARNING, e.toString(), e);
          }
        }
      }
    } finally {
      xa.commit();
    }
  }

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   * Rebuilds the indexes
   */
  public void validateIndexes()
    throws IOException, SQLException
  {
    Transaction xa = Transaction.create();
    xa.setAutoCommit(true);


    try {
      TableIterator iter = createTableIterator();


      iter.init(xa);


      Column []columns = _row.getColumns();


      while (iter.nextBlock()) {
        iter.initRow();


        byte []blockBuffer = iter.getBuffer();


        while (iter.nextRow()) {
          try {
            long rowAddress = iter.getRowAddress();
            int rowOffset = iter.getRowOffset();


            for (int i = 0; i < columns.length; i++) {
              Column column = columns[i];


              column.validateIndex(xa, blockBuffer, rowOffset, rowAddress);
            }
          } catch (Exception e) {
            log.log(Level.WARNING, e.toString(), e);
          }
        }
      }
    } finally {
      xa.commit();
    }
  }

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  }


  class IndexCacheWriter extends TaskWorker {
    public void runTask()
    {
      Transaction xa = Transaction.create();
      
      try {
        IndexKey key = null;


        Thread.interrupted();

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  private java.sql.ResultSet executeQuery(Query query, 
                                          QueryContext queryContext)
    throws SQLException
  {
    Transaction xa = _conn.getTransaction();


    boolean isOkay = false;
    try {
      query.execute(queryContext, xa);
      isOkay = true;
    } finally {
      if (! xa.isAutoCommit()) {
      }
      else if (isOkay)
        xa.commit();
      else
        xa.rollback();
    }


    _rs = new ResultSetImpl(this, queryContext.getResult());


    return _rs;

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   * @return the number of rows modified
   */
  private int executeUpdate(Query query)
    throws SQLException
  {
    Transaction xa = _conn.getTransaction();
    boolean isOkay = false;


    int rowUpdateCount = 0;


    try {
      _queryContext.setTransaction(xa);


      query.execute(_queryContext, xa);


      rowUpdateCount = _queryContext.getRowUpdateCount();


      isOkay = true;
    } finally {
      if (! xa.isAutoCommit()) {
      }
      else if (isOkay)
        xa.commit();
      else
        xa.rollback();
    }


    return rowUpdateCount;
  }

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  }


  public Transaction getTransaction()
  {
    if (_isAutoCommit) {
      Transaction xa = Transaction.create(this);
      // XXX: value?
      // xa.setTransactionTimeout(15000);
      xa.setAutoCommit(true);
      return xa;
    }
    else if (_xa == null) {
      _xa = Transaction.create(this);

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    throws SQLException
  {
    if (log.isLoggable(Level.FINER))
      log.finer("commit " + this + " " + _xa);
    
    Transaction xa = _xa;
    _xa = null;
    
    if (xa != null)
      xa.commit();
  }

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  }


  public void rollback()
    throws SQLException
  {
    Transaction xa = _xa;
    _xa = null;


    if (xa != null) {
      if (log.isLoggable(Level.FINER))
  log.finer("rollback " + this + " " + _xa);
    
      xa.rollback();
    }
  }

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  public void setAutoCommit(boolean autoCommit)
    throws SQLException
  {
    if (! _isAutoCommit && autoCommit) {
      Transaction xa = _xa;
      _xa = null;
    
      if (xa != null)
  xa.commit();
    }
    
    _isAutoCommit = autoCommit;
  }

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  public boolean execute()
    throws SQLException
  {
    _count++;


    Transaction xa = null;


    try {
      if (_count != 1)
        throw new IllegalStateException("Multithreading execute");


      xa = _conn.getTransaction();
      QueryContext queryContext = getQueryContext();


      if (_query.isSelect()) {
        _query.execute(queryContext, xa);


        _wasResultSet = true;
        _resultSet = new ResultSetImpl(this, queryContext.getResult());


        return true;
      }
      else {
        queryContext.setReturnGeneratedKeys(_isReturnGeneratedKeys);


        _query.execute(queryContext, xa);


        _wasResultSet = false;
        return false;
      }
    } finally {
      _count--;


      if (xa != null && xa.isAutoCommit())
        xa.rollback();
    }
  }

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com.caucho.db.block.Block

com.caucho.db.index.IndexCache$IndexCacheWriter

com.caucho.db.jdbc.ConnectionImpl

com.caucho.db.jdbc.PreparedStatementImpl

com.caucho.db.jdbc.StatementImpl

com.caucho.db.lock.Lock

com.caucho.db.table.Table

com.caucho.sql.SQLExceptionWrapper

java.sql.SQLException

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