org.apache.activemq.artemis.logs.BundleFactory Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.activemq.artemis.logs;

import java.lang.reflect.Constructor;
import java.security.AccessController;
import java.security.PrivilegedAction;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class BundleFactory {


   public static  T newBundle(final Class type) {
      return newBundle(type, type.getName());
   }

   public static  T newBundle(final Class type, String category) {
      if (System.getSecurityManager() == null) {
         return doNewBundle(type, category);
      } else {
         return AccessController.doPrivileged((PrivilegedAction) () -> doNewBundle(type, category));
      }
   }

   private static  T doNewBundle(final Class type, String category) {
      final String implClassName = type.getName() + "_impl";

      final Class implClass;
      try {
         implClass = Class.forName(implClassName, true, type.getClassLoader()).asSubclass(type);
      } catch (Exception e) {
         throw new IllegalArgumentException("Unable to find class for log/message impl: " + implClassName, e);
      }

      final Constructor constructor;
      try {
         constructor = implClass.getConstructor(Logger.class);
      } catch (Exception e) {
         throw new IllegalArgumentException("Unable to find constructor for log/message impl: " + implClassName, e);
      }

      try {
         Logger logger = LoggerFactory.getLogger(category);

         return type.cast(constructor.newInstance(logger));
      } catch (Exception e) {
         throw new IllegalArgumentException("Unable to create instance for log/message impl: " + implClassName, e);
      }
   }
}