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/*
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 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
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 */

//----------------------------------------------------------------------------
//
// Module:      Log.java
//
// Description: Transaction state logger.
//
// Product:     com.sun.jts.CosTransactions
//
// Author:      Simon Holdsworth
//
// Date:        March, 1997
//
// Copyright (c):   1995-1997 IBM Corp.
//
//   The source code for this program is not published or otherwise divested
//   of its trade secrets, irrespective of what has been deposited with the
//   U.S. Copyright Office.
//
//   This software contains confidential and proprietary information of
//   IBM Corp.
//----------------------------------------------------------------------------

package com.sun.jts.CosTransactions;

// Import required classes.

import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.jts.utils.LogFormatter;


/**The Log class provides operations that control the physical log
 * as an entity versus the individual LogFiles that form the log. It supports
 * the initialisation, opening and termination of the log. Different physical
 * logs can be placed on the system with only minor changes to the methods
 * contained in this class.
 *
 * @version 0.01
 *
 * @author Simon Holdsworth, IBM Corporation
 *
 * @see
*/
//----------------------------------------------------------------------------
// CHANGE HISTORY
//
// Version By     Change Description
//   0.01  SAJH   Initial implementation.
//-----------------------------------------------------------------------------

class Log {

    /**A reference to the LogControl object.
     */
    private LogControl logControl = null;

    /**The log path.
     */
    // private static String logPath = null;
    private String logPath = null;
	/*
		Logger to log transaction messages
	*/
	static Logger _logger = LogDomains.getLogger(Log.class, LogDomains.TRANSACTION_LOGGER);

    /**Default Log constructor.
     *
     * @param
     *
     * @return
     *
     * @see
     */
    Log() {
        // We need to ensure that messaging is initialised as this may be called
        // prior to SOMTR_Init.

        // Initialise the instance variables.
        logPath = LogControl.getLogPath();

    }


    Log(String logPath) {
        this.logPath = logPath;
    }

    /**Initialises the log.
     *
     * @param
     *
     * @return
     *
     * @see
     */
    boolean initialise() {
        boolean result = true;

        // Call the initialize operation for the log

        logControl = new LogControl();
        logControl.initLog(false,false,logPath);

        return result;
    }


    /**Opens the log for the given server.
     * 

* The given LogSOS object, if any, will be called in the event of the log * going short-on-storage. A LogFile object reference is returned that is used * for operations on the specific portion of the log. * * @param serverName The name of the server whose log file is being opened. * @param upcall The object which will handle upcalls from the log. * * @return The object representing the physical log file. * * @see */ LogFile open( String serverName, LogUpcallTarget upcall ) { LogFile logFile = null; boolean[] newLog = new boolean[1]; newLog[0] = true; // Open the log using the server name. try { LogHandle handle = logControl.openFile(serverName,upcall,null,newLog); // Create a new LogFile object with the handle to represent the open log. logFile = new LogFile(handle); } // If the log open failed, report the error. catch( LogException le ) { _logger.log(Level.SEVERE,"jts.log_error",le); String msg = LogFormatter.getLocalizedMessage(_logger,"jts.log_error", new java.lang.Object[] {le.toString()}); throw (org.omg.CORBA.INTERNAL) (new org.omg.CORBA.INTERNAL(msg)).initCause(le); } return logFile; } /**Terminates the log. * * @param * * @return * * @see */ boolean terminate() { boolean result = true; // No special action needed after the close for the logger return result; } /**Determines whether a log file exists for the given server. *

* This method may be used without initialising the Log object to determine * whether recovery should be performed, without initialising the log or the OTS. * * @param String * * @return * * @see */ static boolean checkFileExists( String serverName ) { // Check whether the file exists. boolean exists = false; if( serverName != null ) { String logPath = LogControl.getLogPath(); exists = LogControl.checkFileExists(serverName,logPath); } return exists; } /**Dumps the state of the object. * * @param * * @return * * @see */ void dump() { //! somtrDUMP_OBJECT_HEADER; // Dump all of the instance variables in the LogFile object, without going // any further down object references. logControl.dump(); } }





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