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LogbackLoggingSystem.java
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LogbackLoggingSystem.java
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/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.logging.impl;
import java.net.URL;
import java.util.Objects;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.util.ContextInitializer;
import ch.qos.logback.core.joran.spi.JoranException;
import io.micronaut.context.annotation.Property;
import io.micronaut.context.annotation.Requires;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.logging.LogLevel;
import io.micronaut.logging.LoggingSystem;
import io.micronaut.logging.LoggingSystemException;
import jakarta.inject.Singleton;
import org.slf4j.LoggerFactory;
/**
* An implementation of {@link LoggingSystem} that works with logback.
*
* @author Matthew Moss
* @since 1.3.0
*/
@Singleton
@Requires(classes = LoggerContext.class)
@Internal
public final class LogbackLoggingSystem implements LoggingSystem {
private static final String DEFAULT_LOGBACK_LOCATION = "logback.xml";
private final String logbackXmlLocation;
public LogbackLoggingSystem(@Nullable @Property(name = "logger.config") String logbackXmlLocation) {
this.logbackXmlLocation = logbackXmlLocation != null ? logbackXmlLocation : DEFAULT_LOGBACK_LOCATION;
}
@Override
public void setLogLevel(String name, LogLevel level) {
getLoggerContext().getLogger(name).setLevel(toLevel(level));
}
@Override
public void refresh() {
LoggerContext context = getLoggerContext();
context.reset();
URL resource = getClass().getClassLoader().getResource(logbackXmlLocation);
if (Objects.isNull(resource)) {
throw new LoggingSystemException("Resource " + logbackXmlLocation + " not found");
}
try {
new ContextInitializer(context).configureByResource(resource);
} catch (JoranException e) {
throw new LoggingSystemException("Error while refreshing Logback", e);
}
}
/**
* @return The logback {@link LoggerContext}
*/
private static LoggerContext getLoggerContext() {
return (LoggerContext) LoggerFactory.getILoggerFactory();
}
/**
* @param logLevel The micronaut {@link LogLevel} to convert
* @return The converted logback {@link Level}
*/
private static Level toLevel(LogLevel logLevel) {
if (logLevel == LogLevel.NOT_SPECIFIED) {
return null;
} else {
return Level.valueOf(logLevel.name());
}
}
}