org.springframework.boot.devtools.logger.DevToolsLogFactory Maven / Gradle / Ivy
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/*
* Copyright 2012-2022 the original author or 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 org.springframework.boot.devtools.logger;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.springframework.boot.context.event.ApplicationPreparedEvent;
import org.springframework.boot.logging.DeferredLog;
import org.springframework.context.ApplicationListener;
/**
* Devtools deferred logging support.
*
* @author Phillip Webb
* @since 2.1.0
*/
public final class DevToolsLogFactory {
private static final Map> logs = new LinkedHashMap<>();
private DevToolsLogFactory() {
}
/**
* Get a {@link Log} instance for the specified source that will be automatically
* {@link DeferredLog#switchTo(Class) switched} when the
* {@link ApplicationPreparedEvent context is prepared}.
* @param source the source for logging
* @return a {@link DeferredLog} instance
*/
public static Log getLog(Class source) {
synchronized (logs) {
Log log = new DeferredLog();
logs.put(log, source);
return log;
}
}
/**
* Listener used to log and switch when the context is ready.
*/
static class Listener implements ApplicationListener {
@Override
public void onApplicationEvent(ApplicationPreparedEvent event) {
synchronized (logs) {
logs.forEach((log, source) -> {
if (log instanceof DeferredLog deferredLog) {
deferredLog.switchTo(source);
}
});
logs.clear();
}
}
}
}