| /* |
| * 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.logging.log4j.core.appender; |
| |
| import java.io.Serializable; |
| import java.util.Objects; |
| |
| import javax.script.Bindings; |
| |
| import org.apache.logging.log4j.core.Appender; |
| import org.apache.logging.log4j.core.Core; |
| import org.apache.logging.log4j.core.Filter; |
| import org.apache.logging.log4j.core.Layout; |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.core.config.Configuration; |
| import org.apache.logging.log4j.core.config.plugins.Plugin; |
| import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute; |
| import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory; |
| import org.apache.logging.log4j.core.config.plugins.PluginConfiguration; |
| import org.apache.logging.log4j.core.config.plugins.PluginElement; |
| import org.apache.logging.log4j.core.config.plugins.validation.constraints.Required; |
| import org.apache.logging.log4j.core.script.AbstractScript; |
| import org.apache.logging.log4j.core.script.ScriptManager; |
| |
| @Plugin(name = "ScriptAppenderSelector", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE, printObject = true) |
| public class ScriptAppenderSelector extends AbstractAppender { |
| |
| /** |
| * Builds an appender. |
| */ |
| public static final class Builder implements org.apache.logging.log4j.core.util.Builder<Appender> { |
| |
| @PluginElement("AppenderSet") |
| @Required |
| private AppenderSet appenderSet; |
| |
| @PluginConfiguration |
| @Required |
| private Configuration configuration; |
| |
| @PluginBuilderAttribute |
| @Required |
| private String name; |
| |
| @PluginElement("Script") |
| @Required |
| private AbstractScript script; |
| |
| @Override |
| public Appender build() { |
| if (name == null) { |
| LOGGER.error("Name missing."); |
| return null; |
| } |
| if (script == null) { |
| LOGGER.error("Script missing for ScriptAppenderSelector appender {}", name); |
| return null; |
| } |
| if (appenderSet == null) { |
| LOGGER.error("AppenderSet missing for ScriptAppenderSelector appender {}", name); |
| return null; |
| } |
| if (configuration == null) { |
| LOGGER.error("Configuration missing for ScriptAppenderSelector appender {}", name); |
| return null; |
| } |
| final ScriptManager scriptManager = configuration.getScriptManager(); |
| scriptManager.addScript(script); |
| final Bindings bindings = scriptManager.createBindings(script); |
| final Object object = scriptManager.execute(script.getName(), bindings); |
| final String appenderName = Objects.toString(object, null); |
| final Appender appender = appenderSet.createAppender(appenderName, name); |
| return appender; |
| } |
| |
| public AppenderSet getAppenderSet() { |
| return appenderSet; |
| } |
| |
| public Configuration getConfiguration() { |
| return configuration; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public AbstractScript getScript() { |
| return script; |
| } |
| |
| public Builder withAppenderNodeSet(@SuppressWarnings("hiding") final AppenderSet appenderSet) { |
| this.appenderSet = appenderSet; |
| return this; |
| } |
| |
| public Builder withConfiguration(@SuppressWarnings("hiding") final Configuration configuration) { |
| this.configuration = configuration; |
| return this; |
| } |
| |
| public Builder withName(@SuppressWarnings("hiding") final String name) { |
| this.name = name; |
| return this; |
| } |
| |
| public Builder withScript(@SuppressWarnings("hiding") final AbstractScript script) { |
| this.script = script; |
| return this; |
| } |
| |
| } |
| |
| @PluginBuilderFactory |
| public static Builder newBuilder() { |
| return new Builder(); |
| } |
| |
| private ScriptAppenderSelector(final String name, final Filter filter, final Layout<? extends Serializable> layout) { |
| super(name, filter, layout); |
| } |
| |
| @Override |
| public void append(final LogEvent event) { |
| // Do nothing: This appender is only used to discover and build another appender |
| } |
| |
| } |