com.google.gerrit.server.util.PluginLogFile Maven / Gradle / Ivy
// Copyright (C) 2015 The Android Open Source Project
//
// 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 com.google.gerrit.server.util;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.gerrit.extensions.systemstatus.ServerInformation;
import org.apache.log4j.AsyncAppender;
import org.apache.log4j.Layout;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
public abstract class PluginLogFile implements LifecycleListener {
private final SystemLog systemLog;
private final ServerInformation serverInfo;
private final String logName;
private final Layout layout;
public PluginLogFile(
SystemLog systemLog, ServerInformation serverInfo, String logName, Layout layout) {
this.systemLog = systemLog;
this.serverInfo = serverInfo;
this.logName = logName;
this.layout = layout;
}
@Override
public void start() {
AsyncAppender asyncAppender = systemLog.createAsyncAppender(logName, layout, true, true);
Logger logger = LogManager.getLogger(logName);
logger.removeAppender(logName);
logger.addAppender(asyncAppender);
logger.setAdditivity(false);
}
@Override
public void stop() {
// stop is called when plugin is unloaded or when the server shutdown.
// Only clean up when the server is shutting down to prevent issue when a
// plugin is reloaded. The issue is that gerrit load the new plugin and then
// unload the old one so because loggers are static, the unload of the old
// plugin would remove the appenders just created by the new plugin.
if (serverInfo.getState() == ServerInformation.State.SHUTDOWN) {
LogManager.getLogger(logName).removeAllAppenders();
}
}
}