com.google.appengine.tools.util.Logging Maven / Gradle / Ivy
/*
* Copyright 2021 Google LLC
*
* 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 com.google.appengine.tools.util;
import com.google.appengine.tools.info.AppengineSdk;
import java.io.File;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.Logger;
/**
* A utility class for working with Logging.
*
*/
public class Logging {
public static final String LOGGING_CONFIG_FILE = "java.util.logging.config.file";
private static final Logger log = Logger.getLogger(Logging.class.getName());
/**
* Initializes logging if the system property, {@link #LOGGING_CONFIG_FILE},
* has not been set. Also sets the system property to the default SDK
* logging config file.
*
* Since this property re-initializes the entire logging system,
* it should generally only be used from the entry point of an application
* rather than from arbitrary code.
*/
public static void initializeLogging() {
String logConfig = System.getProperty(LOGGING_CONFIG_FILE);
if (logConfig == null) {
File config = AppengineSdk.getSdk().getLoggingProperties();
System.setProperty(LOGGING_CONFIG_FILE, config.getAbsolutePath());
try {
LogManager.getLogManager().readConfiguration();
} catch (Exception e) {
// Might be an IOException, might be a SecurityException
// Regardless of what it is, we're always going to do the same thing.
log.log(Level.INFO, "Failed to read the default logging configuration", e);
}
}
}
private Logging() {
}
}