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psiprobe.tools.logging.slf4jlogback.TomcatSlf4jLogbackLoggerAccessor Maven / Gradle / Ivy
PSI Probe Core - Core logic, data models, and controllers
/*
* Licensed under the GPL License. You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/
package psiprobe.tools.logging.slf4jlogback;
import com.google.common.collect.Iterators;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.lang3.reflect.MethodUtils;
import psiprobe.tools.logging.DefaultAccessor;
/**
* A wrapper for a TomcatSlf4jLogback logger.
*/
public class TomcatSlf4jLogbackLoggerAccessor extends DefaultAccessor {
/**
* Returns all appenders of this logger.
*
* @return a list of {@link TomcatSlf4jLogbackAppenderAccessor}s
*/
@SuppressWarnings("unchecked")
public List getAppenders() {
List appenders = new ArrayList<>();
try {
for (Object appender : Collections.list(Iterators.asEnumeration(
(Iterator) MethodUtils.invokeMethod(getTarget(), "iteratorForAppenders")))) {
List siftedAppenders = getSiftedAppenders(appender);
if (!siftedAppenders.isEmpty()) {
for (Object siftedAppender : siftedAppenders) {
wrapAndAddAppender(siftedAppender, appenders);
}
} else {
wrapAndAddAppender(appender, appenders);
}
}
} catch (NoClassDefFoundError e) {
logger.error("{}#getAppenders() failed", getTarget().getClass().getName(), e);
logger.error("To see this logger, upgrade slf4j to 1.7.21+");
} catch (Exception e) {
logger.error("{}#getAppenders() failed", getTarget().getClass().getName(), e);
}
return appenders;
}
/**
* Returns the appender of this logger with the given name.
*
* @param name the name of the appender to return
*
* @return the appender with the given name, or null if no such appender exists for this logger
*/
public TomcatSlf4jLogbackAppenderAccessor getAppender(String name) {
try {
Object appender = MethodUtils.invokeMethod(getTarget(), "getAppender", name);
if (appender == null) {
List appenders = getAppenders();
for (TomcatSlf4jLogbackAppenderAccessor wrappedAppender : appenders) {
if (wrappedAppender.getIndex().equals(name)) {
return wrappedAppender;
}
}
}
return wrapAppender(appender);
} catch (Exception e) {
logger.error("{}#getAppender() failed", getTarget().getClass().getName(), e);
}
return null;
}
/**
* Checks if is context.
*
* @return true, if is context
*/
public boolean isContext() {
return false;
}
/**
* Checks if is root.
*
* @return true, if is root
*/
public boolean isRoot() {
return "ROOT".equals(getName());
}
/**
* Gets the name.
*
* @return the name
*/
public String getName() {
return (String) getProperty(getTarget(), "name", null);
}
/**
* Gets the log level of this logger.
*
* @return the level of this logger
*/
public String getLevel() {
try {
Object level = MethodUtils.invokeMethod(getTarget(), "getLevel");
return (String) MethodUtils.invokeMethod(level, "toString");
} catch (Exception e) {
logger.error("{}#getLevel() failed", getTarget().getClass().getName(), e);
}
return null;
}
/**
* Sets the log level of this logger.
*
* @param newLevelStr the name of the new level
*/
public void setLevel(String newLevelStr) {
try {
Object level = MethodUtils.invokeMethod(getTarget(), "getLevel");
Object newLevel = MethodUtils.invokeMethod(level, "toLevel", newLevelStr);
MethodUtils.invokeMethod(getTarget(), "setLevel", newLevel);
} catch (Exception e) {
logger.error("{}#setLevel('{}') failed", getTarget().getClass().getName(), newLevelStr, e);
}
}
/**
* Gets the sifted appenders.
*
* @param appender the appender
*
* @return the sifted appenders
*
* @throws Exception the exception
*/
@SuppressWarnings("unchecked")
private List getSiftedAppenders(Object appender) throws Exception {
if ("org.apache.juli.logging.ch.qos.logback.classic.sift.SiftingAppender"
.equals(appender.getClass().getName())) {
Object tracker = MethodUtils.invokeMethod(appender, "getAppenderTracker");
if (tracker != null) {
return (List) MethodUtils.invokeMethod(tracker, "allComponents");
}
}
return Collections.emptyList();
}
/**
* Wrap and add appender.
*
* @param appender the appender
* @param appenders the appenders
*/
private void wrapAndAddAppender(Object appender,
Collection appenders) {
TomcatSlf4jLogbackAppenderAccessor appenderAccessor = wrapAppender(appender);
if (appenderAccessor != null) {
appenders.add(appenderAccessor);
}
}
/**
* Wrap appender.
*
* @param appender the appender
*
* @return the tomcat slf4j logback appender accessor
*/
private TomcatSlf4jLogbackAppenderAccessor wrapAppender(Object appender) {
try {
if (appender == null) {
throw new IllegalArgumentException("appender is null");
}
TomcatSlf4jLogbackAppenderAccessor appenderAccessor =
new TomcatSlf4jLogbackAppenderAccessor();
appenderAccessor.setTarget(appender);
appenderAccessor.setLoggerAccessor(this);
appenderAccessor.setApplication(getApplication());
return appenderAccessor;
} catch (IllegalArgumentException e) {
logger.error("Could not wrap appender: '{}'", appender, e);
}
return null;
}
}
