/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package javax.sql;

import java.sql.SQLException;
import java.io.PrintWriter;

/**
 * Interface that defines the methods which are common between <code>DataSource</code>,
 * <code>XADataSource</code> and <code>ConnectionPoolDataSource</code>.
 *<p>
 */
public interface CommonDataSource {
  
  /**
   * <p>Retrieves the log writer for this <code>DataSource</code>
   * object.
   *
   * <p>The log writer is a character output stream to which all logging
   * and tracing messages for this data source will be
   * printed.  This includes messages printed by the methods of this
   * object, messages printed by methods of other objects manufactured
   * by this object, and so on.  Messages printed to a data source
   * specific log writer are not printed to the log writer associated
   * with the <code>java.sql.DriverManager</code> class.  When a
   * <code>DataSource</code> object is
   * created, the log writer is initially null; in other words, the
   * default is for logging to be disabled.
   *
   * @return the log writer for this data source or null if
   *        logging is disabled
   * @exception java.sql.SQLException if a database access error occurs
   * @see #setLogWriter
   * @since 1.4
   */
  java.io.PrintWriter getLogWriter() throws SQLException;

  /**
   * <p>Sets the log writer for this <code>DataSource</code>
   * object to the given <code>java.io.PrintWriter</code> object.
   *
   * <p>The log writer is a character output stream to which all logging
   * and tracing messages for this data source will be
   * printed.  This includes messages printed by the methods of this
   * object, messages printed by methods of other objects manufactured
   * by this object, and so on.  Messages printed to a data source-
   * specific log writer are not printed to the log writer associated
   * with the <code>java.sql.DriverManager</code> class. When a
   * <code>DataSource</code> object is created the log writer is
   * initially null; in other words, the default is for logging to be
   * disabled.
   *
   * @param out the new log writer; to disable logging, set to null
   * @exception SQLException if a database access error occurs
   * @see #getLogWriter
   * @since 1.4
   */
  void setLogWriter(java.io.PrintWriter out) throws SQLException;

  /**
   * <p>Sets the maximum time in seconds that this data source will wait
   * while attempting to connect to a database.  A value of zero
   * specifies that the timeout is the default system timeout
   * if there is one; otherwise, it specifies that there is no timeout.
   * When a <code>DataSource</code> object is created, the login timeout is
   * initially zero.
   *
   * @param seconds the data source login time limit
   * @exception SQLException if a database access error occurs.
   * @see #getLoginTimeout
   * @since 1.4
   */
  void setLoginTimeout(int seconds) throws SQLException;

  /**
   * Gets the maximum time in seconds that this data source can wait
   * while attempting to connect to a database.  A value of zero
   * means that the timeout is the default system timeout
   * if there is one; otherwise, it means that there is no timeout.
   * When a <code>DataSource</code> object is created, the login timeout is
   * initially zero.
   *
   * @return the data source login time limit
   * @exception SQLException if a database access error occurs.
   * @see #setLoginTimeout
   * @since 1.4
   */
  int getLoginTimeout() throws SQLException; 
  
}