| /* |
| * 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.log4j.builders; |
| |
| import org.apache.log4j.Appender; |
| import org.apache.log4j.Layout; |
| import org.apache.log4j.builders.appender.AppenderBuilder; |
| import org.apache.log4j.builders.filter.FilterBuilder; |
| import org.apache.log4j.builders.layout.LayoutBuilder; |
| import org.apache.log4j.builders.rewrite.RewritePolicyBuilder; |
| import org.apache.log4j.config.PropertiesConfiguration; |
| import org.apache.log4j.rewrite.RewritePolicy; |
| import org.apache.log4j.spi.Filter; |
| import org.apache.log4j.xml.XmlConfiguration; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.plugins.util.PluginManager; |
| import org.apache.logging.log4j.plugins.util.PluginType; |
| import org.apache.logging.log4j.status.StatusLogger; |
| import org.apache.logging.log4j.util.LoaderUtil; |
| import org.w3c.dom.Element; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| /** |
| * |
| */ |
| public class BuilderManager { |
| |
| public static final String CATEGORY = "Log4j Builder"; |
| private static final Logger LOGGER = StatusLogger.getLogger(); |
| private final Map<String, PluginType<?>> plugins; |
| private static Class<?>[] constructorParams = new Class[] { String.class, Properties.class}; |
| |
| public BuilderManager() { |
| final PluginManager manager = new PluginManager(CATEGORY); |
| manager.collectPlugins(); |
| plugins = manager.getPlugins(); |
| } |
| |
| public Appender parseAppender(String className, Element appenderElement, XmlConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| try { |
| @SuppressWarnings("unchecked") |
| AppenderBuilder builder = (AppenderBuilder) LoaderUtil.newInstanceOf(plugin.getPluginClass()); |
| return builder.parseAppender(appenderElement, config); |
| } catch (InstantiationException | IllegalAccessException | InvocationTargetException ex) { |
| LOGGER.warn("Unable to load plugin: {} due to: {}", plugin.getKey(), ex.getMessage()); |
| } |
| } |
| return null; |
| } |
| |
| public Appender parseAppender(String name, String className, String prefix, String layoutPrefix, |
| String filterPrefix, Properties props, PropertiesConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| AppenderBuilder builder = createBuilder(plugin, prefix, props); |
| if (builder != null) { |
| return builder.parseAppender(name, prefix, layoutPrefix, filterPrefix, props, config); |
| } |
| } |
| return null; |
| } |
| |
| public Filter parseFilter(String className, Element filterElement, XmlConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| try { |
| @SuppressWarnings("unchecked") |
| FilterBuilder builder = (FilterBuilder) LoaderUtil.newInstanceOf(plugin.getPluginClass()); |
| return builder.parseFilter(filterElement, config); |
| } catch (InstantiationException | IllegalAccessException | InvocationTargetException ex) { |
| LOGGER.warn("Unable to load plugin: {} due to: {}", plugin.getKey(), ex.getMessage()); |
| } |
| } |
| return null; |
| } |
| |
| public Filter parseFilter(String className, String filterPrefix, Properties props, PropertiesConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| FilterBuilder builder = createBuilder(plugin, filterPrefix, props); |
| if (builder != null) { |
| return builder.parseFilter(config); |
| } |
| } |
| return null; |
| } |
| |
| public Layout parseLayout(String className, Element layoutElement, XmlConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| try { |
| @SuppressWarnings("unchecked") |
| LayoutBuilder builder = (LayoutBuilder) LoaderUtil.newInstanceOf(plugin.getPluginClass()); |
| return builder.parseLayout(layoutElement, config); |
| } catch (InstantiationException | IllegalAccessException | InvocationTargetException ex) { |
| LOGGER.warn("Unable to load plugin: {} due to: {}", plugin.getKey(), ex.getMessage()); |
| } |
| } |
| return null; |
| } |
| public Layout parseLayout(String className, String layoutPrefix, Properties props, PropertiesConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| LayoutBuilder builder = createBuilder(plugin, layoutPrefix, props); |
| if (builder != null) { |
| return builder.parseLayout(config); |
| } |
| } |
| return null; |
| } |
| |
| public RewritePolicy parseRewritePolicy(String className, Element rewriteElement, XmlConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| try { |
| @SuppressWarnings("unchecked") |
| RewritePolicyBuilder builder = (RewritePolicyBuilder) LoaderUtil.newInstanceOf(plugin.getPluginClass()); |
| return builder.parseRewritePolicy(rewriteElement, config); |
| } catch (InstantiationException | IllegalAccessException | InvocationTargetException ex) { |
| LOGGER.warn("Unable to load plugin: {} due to: {}", plugin.getKey(), ex.getMessage()); |
| } |
| } |
| return null; |
| } |
| public RewritePolicy parseRewritePolicy(String className, String policyPrefix, Properties props, PropertiesConfiguration config) { |
| PluginType<?> plugin = plugins.get(className.toLowerCase()); |
| if (plugin != null) { |
| RewritePolicyBuilder builder = createBuilder(plugin, policyPrefix, props); |
| if (builder != null) { |
| return builder.parseRewritePolicy(config); |
| } |
| } |
| return null; |
| } |
| |
| private <T extends AbstractBuilder> T createBuilder(PluginType<?> plugin, String prefix, Properties props) { |
| try { |
| Class<?> clazz = plugin.getPluginClass(); |
| if (AbstractBuilder.class.isAssignableFrom(clazz)) { |
| @SuppressWarnings("unchecked") |
| Constructor<T> constructor = |
| (Constructor<T>) clazz.getConstructor(constructorParams); |
| return constructor.newInstance(prefix, props); |
| } else { |
| @SuppressWarnings("unchecked") |
| T builder = (T) LoaderUtil.newInstanceOf(clazz); |
| return builder; |
| } |
| } catch (NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException ex) { |
| LOGGER.warn("Unable to load plugin: {} due to: {}", plugin.getKey(), ex.getMessage()); |
| return null; |
| } |
| } |
| |
| } |