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ch.qos.logback.classic.util.ContextInitializer Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.util;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Set;
import ch.qos.logback.classic.BasicConfigurator;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.gaffer.GafferUtil;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.classic.spi.Configurator;
import ch.qos.logback.core.LogbackException;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.status.ErrorStatus;
import ch.qos.logback.core.status.InfoStatus;
import ch.qos.logback.core.status.StatusManager;
import ch.qos.logback.core.status.WarnStatus;
import ch.qos.logback.core.util.Loader;
import ch.qos.logback.core.util.OptionHelper;
import ch.qos.logback.core.util.StatusListenerConfigHelper;
// contributors
// Ted Graham, Matt Fowles, see also http://jira.qos.ch/browse/LBCORE-32
/**
* This class contains logback's logic for automatic configuration
*
* @author Ceki Gulcu
*/
public class ContextInitializer {
final public static String GROOVY_AUTOCONFIG_FILE = "logback.groovy";
final public static String AUTOCONFIG_FILE = "logback.xml";
final public static String TEST_AUTOCONFIG_FILE = "logback-test.xml";
final public static String CONFIG_FILE_PROPERTY = "logback.configurationFile";
final LoggerContext loggerContext;
public ContextInitializer(LoggerContext loggerContext) {
this.loggerContext = loggerContext;
}
public void configureByResource(URL url) throws JoranException {
if (url == null) {
throw new IllegalArgumentException("URL argument cannot be null");
}
final String urlString = url.toString();
if (urlString.endsWith("groovy")) {
if (EnvUtil.isGroovyAvailable()) {
// avoid directly referring to GafferConfigurator so as to avoid
// loading groovy.lang.GroovyObject . See also http://jira.qos.ch/browse/LBCLASSIC-214
GafferUtil.runGafferConfiguratorOn(loggerContext, this, url);
} else {
StatusManager sm = loggerContext.getStatusManager();
sm.add(new ErrorStatus("Groovy classes are not available on the class path. ABORTING INITIALIZATION.", loggerContext));
}
} else if (urlString.endsWith("xml")) {
JoranConfigurator configurator = new JoranConfigurator();
configurator.setContext(loggerContext);
configurator.doConfigure(url);
} else {
throw new LogbackException("Unexpected filename extension of file [" + url.toString() + "]. Should be either .groovy or .xml");
}
}
void joranConfigureByResource(URL url) throws JoranException {
JoranConfigurator configurator = new JoranConfigurator();
configurator.setContext(loggerContext);
configurator.doConfigure(url);
}
private URL findConfigFileURLFromSystemProperties(ClassLoader classLoader, boolean updateStatus) {
String logbackConfigFile = OptionHelper.getSystemProperty(CONFIG_FILE_PROPERTY);
if (logbackConfigFile != null) {
URL result = null;
try {
result = new URL(logbackConfigFile);
return result;
} catch (MalformedURLException e) {
// so, resource is not a URL:
// attempt to get the resource from the class path
result = Loader.getResource(logbackConfigFile, classLoader);
if (result != null) {
return result;
}
File f = new File(logbackConfigFile);
if (f.exists() && f.isFile()) {
try {
result = f.toURI().toURL();
return result;
} catch (MalformedURLException e1) {
}
}
} finally {
if (updateStatus) {
statusOnResourceSearch(logbackConfigFile, classLoader, result);
}
}
}
return null;
}
public URL findURLOfDefaultConfigurationFile(boolean updateStatus) {
ClassLoader myClassLoader = Loader.getClassLoaderOfObject(this);
URL url = findConfigFileURLFromSystemProperties(myClassLoader, updateStatus);
if (url != null) {
return url;
}
url = getResource(GROOVY_AUTOCONFIG_FILE, myClassLoader, updateStatus);
if (url != null) {
return url;
}
url = getResource(TEST_AUTOCONFIG_FILE, myClassLoader, updateStatus);
if (url != null) {
return url;
}
return getResource(AUTOCONFIG_FILE, myClassLoader, updateStatus);
}
private URL getResource(String filename, ClassLoader myClassLoader, boolean updateStatus) {
URL url = Loader.getResource(filename, myClassLoader);
if (updateStatus) {
statusOnResourceSearch(filename, myClassLoader, url);
}
return url;
}
public void autoConfig() throws JoranException {
StatusListenerConfigHelper.installIfAsked(loggerContext);
URL url = findURLOfDefaultConfigurationFile(true);
if (url != null) {
configureByResource(url);
} else {
Configurator c = EnvUtil.loadFromServiceLoader(Configurator.class);
if (c != null) {
try {
c.setContext(loggerContext);
c.configure(loggerContext);
} catch (Exception e) {
throw new LogbackException(String.format("Failed to initialize Configurator: %s using ServiceLoader", c != null ? c.getClass()
.getCanonicalName() : "null"), e);
}
} else {
BasicConfigurator basicConfigurator = new BasicConfigurator();
basicConfigurator.setContext(loggerContext);
basicConfigurator.configure(loggerContext);
}
}
}
private void statusOnResourceSearch(String resourceName, ClassLoader classLoader, URL url) {
StatusManager sm = loggerContext.getStatusManager();
if (url == null) {
sm.add(new InfoStatus("Could NOT find resource [" + resourceName + "]", loggerContext));
} else {
sm.add(new InfoStatus("Found resource [" + resourceName + "] at [" + url.toString() + "]", loggerContext));
multiplicityWarning(resourceName, classLoader);
}
}
private void multiplicityWarning(String resourceName, ClassLoader classLoader) {
Set urlSet = null;
StatusManager sm = loggerContext.getStatusManager();
try {
urlSet = Loader.getResources(resourceName, classLoader);
} catch (IOException e) {
sm.add(new ErrorStatus("Failed to get url list for resource [" + resourceName + "]", loggerContext, e));
}
if (urlSet != null && urlSet.size() > 1) {
sm.add(new WarnStatus("Resource [" + resourceName + "] occurs multiple times on the classpath.", loggerContext));
for (URL url : urlSet) {
sm.add(new WarnStatus("Resource [" + resourceName + "] occurs at [" + url.toString() + "]", loggerContext));
}
}
}
}
