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LogService.java
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/*
* #%L
* SciJava Common shared library for SciJava software.
* %%
* Copyright (C) 2009 - 2026 SciJava developers.
* %%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* #L%
*/
package org.scijava.log;
import org.scijava.service.SciJavaService;
/**
* Interface for the logging service.
* <p>
* The service supports five common logging levels: {@link #ERROR},
* {@link #WARN}, {@link #INFO}, {@link #TRACE} and {@link #DEBUG}. It is
* extensible to additional levels as needed. It provides methods for logging
* messages, exception stack traces and combinations of the two.
* </p>
*
* @author Curtis Rueden
* @author Matthias Arzt
*/
public interface LogService extends SciJavaService, Logger {
/** System property to set for overriding the default logging level. */
String LOG_LEVEL_PROPERTY = "scijava.log.level";
String LOG_LEVEL_BY_SOURCE_PROPERTY = "scijava.log.level.source";
/** Changes the log level of the root logger. */
void setLevel(int level);
/**
* For messages that are logged directly to the LogService. The log level can
* be set depending on the class that makes the log.
*
* @param classOrPackageName If this is the name of a class. Messages logged
* directly by this class are logged, if the message's level is less
* or equal to the given level. If this is a package, the same holds
* for all classes in this package.
* @param level Given level.
*/
void setLevel(String classOrPackageName, int level);
/**
* Setting the log level for loggers depending on their {@link LogSource}.
* This will only affect loggers that are created after this method has been
* called.
*/
void setLevelForLogger(String source, int level);
// -- Deprecated --
/** @deprecated Use {@link LogLevel#NONE}. */
@Deprecated
int NONE = LogLevel.NONE;
/** @deprecated Use {@link LogLevel#ERROR}. */
@Deprecated
int ERROR = LogLevel.ERROR;
/** @deprecated Use {@link LogLevel#WARN}. */
@Deprecated
int WARN = LogLevel.WARN;
/** @deprecated Use {@link LogLevel#INFO}. */
@Deprecated
int INFO = LogLevel.INFO;
/** @deprecated Use {@link LogLevel#DEBUG}. */
@Deprecated
int DEBUG = LogLevel.DEBUG;
/** @deprecated Use {@link LogLevel#TRACE}. */
@Deprecated
int TRACE = LogLevel.TRACE;
}