org.wildfly.swarm.container.runtime.LogSilencer Maven / Gradle / Ivy
/**
* Copyright 2015-2017 Red Hat, Inc, and individual contributors.
*
* 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
*
* http://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.wildfly.swarm.container.runtime;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.Logger;
import java.util.stream.Collectors;
/**
* @author Bob McWhirter
*/
public class LogSilencer {
private final String name;
private Logger logger;
private Level originalLevel;
private LogSilencer(String name) {
this.name = name;
}
void silence() {
try {
LogManager lm = LogManager.getLogManager();
this.logger = lm.getLogger(name);
this.originalLevel = this.logger.getLevel();
this.logger.setLevel(Level.SEVERE);
} catch (Throwable t) {
// ignore;
}
}
void unsilence() {
if (this.logger != null) {
this.logger.setLevel(this.originalLevel);
}
}
public static SilentExecutor silently(String... loggers) {
return new SilentExecutor(
Arrays.stream(loggers)
.map(LogSilencer::new)
.collect(Collectors.toList()));
}
public static class SilentExecutor {
private final List silencers;
SilentExecutor(List silencers) {
this.silencers = silencers;
}
public T execute(Callable block) throws Exception {
this.silencers.forEach(LogSilencer::silence);
try {
return block.call();
} finally {
this.silencers.forEach(LogSilencer::unsilence);
}
}
}
}