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/*******************************************************************************
* Copyright (c) 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.framework.log;
import java.io.*;
import org.osgi.framework.FrameworkEvent;
/**
* The FramworkLog interface. A FrameworkLog implementation is provided by the
* FrameworkAdaptor and used by the Framework to log any error messages and
* FrameworkEvents of type ERROR. The FrameworkLog may persist the log messages
* to the filesystem or allow other ways of accessing the log information.
*/
public interface FrameworkLog {
/**
* A service lookup constant (value "performance") indicating an
* implementation of the logging service that logs performance events.
* Create a filter with this property set to <code>"true"</code> in order to
* obtain a performance log.
*
* @since 3.1
*/
public static final String SERVICE_PERFORMANCE = "performance"; //$NON-NLS-1$
/**
* Logs the information from a FrameworkEvent to the FrameworkLog.
* @param frameworkEvent The FrameworkEvent to log.
*/
public void log(FrameworkEvent frameworkEvent);
/**
* Logs the FrameworkLogEntry to the FrameworkLog
* @param logEntry The entry to log.
*/
public void log(FrameworkLogEntry logEntry);
/**
* Sets the current Writer used to log messages to the specified
* newWriter. If append is set to true then the content
* of the current Writer will be appended to the new Writer
* if possible.
* @param newWriter The Writer to use for logging messages.
* @param append Indicates whether the content of the current Writer
* used for logging messages should be appended to the end of the new
* Writer.
*/
public void setWriter(Writer newWriter, boolean append);
/**
* Sets the current File used to log messages to a FileWriter
* using the specified File. If append is set to true then the
* content of the current Writer will be appended to the
* new File if possible.
* @param newFile The File to create a new FileWriter which will be
* used for logging messages.
* @param append Indicates whether the content of the current Writer
* used for logging messages should be appended to the end of the new
* File.
* @throws IOException if any problem occurs while constructing a
* FileWriter from the newFile. If this exception is thrown the
* FrameworkLog will not be effected and will continue to use the
* current Writer to log messages.
*/
public void setFile(File newFile, boolean append) throws IOException;
/**
* Returns the log File if it is set, otherwise null is returned.
* @return the log File if it is set, otherwise null is returned.
*/
public File getFile();
/**
* Sets the console log option. If this is set then all logs will be
* logged to System.out as well as the current Writer.
* @param consoleLog indicates whether to log to System.out
*/
public void setConsoleLog(boolean consoleLog);
/**
* Closes the FrameworkLog. After the FrameworkLog is closed messages may
* no longer be logged to it.
*/
public void close();
}
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