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Utils.java
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Utils.java
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/*
* Copyright 2015-2017 the original author or authors.
*
* 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.appng.tomcat.session;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.Constructor;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletContext;
import org.apache.catalina.connector.Request;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
public class Utils {
private static Log internalLog = LogFactory.getLog(Utils.class);
private static Class<?> slf4jLoggerFactory;
static {
try {
slf4jLoggerFactory = Utils.class.getClassLoader().loadClass("org.slf4j.LoggerFactory");
} catch (ClassNotFoundException e) {
internalLog.info("org.slf4j.LoggerFactory not present");
}
}
public static Log getLog(Class<?> clazz) {
if (null != slf4jLoggerFactory) {
try {
Object slf4jLogger = slf4jLoggerFactory.getMethod("getLogger", Class.class).invoke(null, clazz);
return getSlf4jWrapper(clazz, slf4jLogger);
} catch (Exception e) {
LogFactory.getLog(Utils.class).error("error while retrieving slf4j logger", e);
}
}
return LogFactory.getLog(clazz);
}
public static boolean isTemplateRequest(Request request) {
return request.getServletPath().startsWith(getTemplatePrefix(request.getServletContext()));
}
public static String getTemplatePrefix(ServletContext servletContext) {
try {
@SuppressWarnings("unchecked")
Object platformConfig = ((Map<String, Object>) servletContext.getAttribute("PLATFORM"))
.get("platformConfig");
return (String) platformConfig.getClass().getMethod("getString", String.class).invoke(platformConfig,
"templatePrefix");
} catch (ReflectiveOperationException e) {
throw new IllegalArgumentException(e);
}
}
public static ObjectInputStream getObjectInputStream(ClassLoader classLoader, ServletContext ctx, byte[] data) {
return getObjectInputStream(classLoader, ctx, new ByteArrayInputStream(data));
}
public static ObjectInputStream getObjectInputStream(ClassLoader classLoader, ServletContext ctx,
InputStream data) {
ObjectInputStream ois = null;
try {
@SuppressWarnings("unchecked")
Constructor<ObjectInputStream> constructor = (Constructor<ObjectInputStream>) classLoader
.loadClass(Constants.INPUT_STREAM_CLASS)
.getDeclaredConstructor(InputStream.class, ServletContext.class);
ois = constructor.newInstance(data, ctx);
} catch (ReflectiveOperationException e) {
throw new IllegalArgumentException(e);
}
return ois;
}
private static Log getSlf4jWrapper(Class<?> clazz, Object slf4jLogger) {
return new Log() {
@SuppressWarnings("unchecked")
private <T> T callRealMethod(String name, Object... args) {
try {
Class<?>[] types = new Class<?>[args.length];
List<Object> argsList = Arrays.asList(args);
if (types.length > 0) {
types[0] = String.class;
if (null == args[0]) {
argsList.set(0, "");
} else if (!String.class.isAssignableFrom(args[0].getClass())) {
argsList.set(0, args[0].toString());
}
for (int i = 1; i < types.length; i++) {
types[i] = Throwable.class.isAssignableFrom(args[i].getClass()) ? Throwable.class
: Object.class;
}
}
return (T) slf4jLogger.getClass().getMethod(name, types).invoke(slf4jLogger, argsList.toArray());
} catch (Exception e) {
LogFactory.getLog(clazz).error("error while using slf4j", e);
}
return null;
}
public void warn(Object message, Throwable t) {
callRealMethod("warn", message, t);
}
public void warn(Object message) {
callRealMethod("trace", message);
}
public void trace(Object message, Throwable t) {
callRealMethod("trace", message, t);
}
public void trace(Object message) {
callRealMethod("trace", message);
}
public boolean isWarnEnabled() {
return callRealMethod("isWarnEnabled");
}
public boolean isTraceEnabled() {
return callRealMethod("isTraceEnabled");
}
public boolean isInfoEnabled() {
return callRealMethod("isInfoEnabled");
}
public boolean isFatalEnabled() {
return isErrorEnabled();
}
public boolean isErrorEnabled() {
return callRealMethod("isErrorEnabled");
}
public boolean isDebugEnabled() {
return callRealMethod("isDebugEnabled");
}
public void info(Object message, Throwable t) {
callRealMethod("info", message, t);
}
public void info(Object message) {
callRealMethod("info", message);
}
public void fatal(Object message, Throwable t) {
error(message, t);
}
public void fatal(Object message) {
error(message);
}
public void error(Object message, Throwable t) {
callRealMethod("error", message, t);
}
public void error(Object message) {
callRealMethod("error", message);
}
public void debug(Object message, Throwable t) {
callRealMethod("debug", message, t);
}
public void debug(Object message) {
callRealMethod("debug", message);
}
};
}
}