| /* |
| * 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.routing; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.TimeUnit; |
| |
| 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.LifeCycle2; |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.core.appender.AbstractAppender; |
| import org.apache.logging.log4j.core.appender.rewrite.RewritePolicy; |
| import org.apache.logging.log4j.core.config.AppenderControl; |
| import org.apache.logging.log4j.core.config.Configuration; |
| import org.apache.logging.log4j.core.config.Node; |
| import org.apache.logging.log4j.core.config.plugins.Plugin; |
| import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory; |
| import org.apache.logging.log4j.core.config.plugins.PluginElement; |
| import org.apache.logging.log4j.core.script.AbstractScript; |
| import org.apache.logging.log4j.core.script.ScriptManager; |
| import org.apache.logging.log4j.core.util.Booleans; |
| |
| /** |
| * This Appender "routes" between various Appenders, some of which can be references to |
| * Appenders defined earlier in the configuration while others can be dynamically created |
| * within this Appender as required. Routing is achieved by specifying a pattern on |
| * the Routing appender declaration. The pattern should contain one or more substitution patterns of |
| * the form "$${[key:]token}". The pattern will be resolved each time the Appender is called using |
| * the built in StrSubstitutor and the StrLookup plugin that matches the specified key. |
| */ |
| @Plugin(name = "Routing", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE, printObject = true) |
| public final class RoutingAppender extends AbstractAppender { |
| |
| public static final String STATIC_VARIABLES_KEY = "staticVariables"; |
| |
| public static class Builder<B extends Builder<B>> extends AbstractAppender.Builder<B> |
| implements org.apache.logging.log4j.core.util.Builder<RoutingAppender> { |
| |
| // Does not work unless the element is called "Script", I wanted "DefaultRounteScript"... |
| @PluginElement("Script") |
| private AbstractScript defaultRouteScript; |
| |
| @PluginElement("Routes") |
| private Routes routes; |
| |
| @PluginElement("RewritePolicy") |
| private RewritePolicy rewritePolicy; |
| |
| @PluginElement("PurgePolicy") |
| private PurgePolicy purgePolicy; |
| |
| @Override |
| public RoutingAppender build() { |
| final String name = getName(); |
| if (name == null) { |
| LOGGER.error("No name defined for this RoutingAppender"); |
| return null; |
| } |
| if (routes == null) { |
| LOGGER.error("No routes defined for RoutingAppender {}", name); |
| return null; |
| } |
| return new RoutingAppender(name, getFilter(), isIgnoreExceptions(), routes, rewritePolicy, |
| getConfiguration(), purgePolicy, defaultRouteScript); |
| } |
| |
| public Routes getRoutes() { |
| return routes; |
| } |
| |
| public AbstractScript getDefaultRouteScript() { |
| return defaultRouteScript; |
| } |
| |
| public RewritePolicy getRewritePolicy() { |
| return rewritePolicy; |
| } |
| |
| public PurgePolicy getPurgePolicy() { |
| return purgePolicy; |
| } |
| |
| public B withRoutes(@SuppressWarnings("hiding") final Routes routes) { |
| this.routes = routes; |
| return asBuilder(); |
| } |
| |
| public B withDefaultRouteScript(@SuppressWarnings("hiding") final AbstractScript defaultRouteScript) { |
| this.defaultRouteScript = defaultRouteScript; |
| return asBuilder(); |
| } |
| |
| public B withRewritePolicy(@SuppressWarnings("hiding") final RewritePolicy rewritePolicy) { |
| this.rewritePolicy = rewritePolicy; |
| return asBuilder(); |
| } |
| |
| public void withPurgePolicy(@SuppressWarnings("hiding") final PurgePolicy purgePolicy) { |
| this.purgePolicy = purgePolicy; |
| } |
| |
| } |
| |
| @PluginBuilderFactory |
| public static <B extends Builder<B>> B newBuilder() { |
| return new Builder<B>().asBuilder(); |
| } |
| |
| private static final String DEFAULT_KEY = "ROUTING_APPENDER_DEFAULT"; |
| |
| private final Routes routes; |
| private Route defaultRoute; |
| private final Configuration configuration; |
| private final ConcurrentMap<String, AppenderControl> appenders = new ConcurrentHashMap<>(); |
| private final RewritePolicy rewritePolicy; |
| private final PurgePolicy purgePolicy; |
| private final AbstractScript defaultRouteScript; |
| private final ConcurrentMap<Object, Object> scriptStaticVariables = new ConcurrentHashMap<>(); |
| |
| private RoutingAppender(final String name, final Filter filter, final boolean ignoreExceptions, final Routes routes, |
| final RewritePolicy rewritePolicy, final Configuration configuration, final PurgePolicy purgePolicy, |
| final AbstractScript defaultRouteScript) { |
| super(name, filter, null, ignoreExceptions); |
| this.routes = routes; |
| this.configuration = configuration; |
| this.rewritePolicy = rewritePolicy; |
| this.purgePolicy = purgePolicy; |
| if (this.purgePolicy != null) { |
| this.purgePolicy.initialize(this); |
| } |
| this.defaultRouteScript = defaultRouteScript; |
| Route defRoute = null; |
| for (final Route route : routes.getRoutes()) { |
| if (route.getKey() == null) { |
| if (defRoute == null) { |
| defRoute = route; |
| } else { |
| error("Multiple default routes. Route " + route.toString() + " will be ignored"); |
| } |
| } |
| } |
| defaultRoute = defRoute; |
| } |
| |
| @Override |
| public void start() { |
| if (defaultRouteScript != null) { |
| if (configuration == null) { |
| error("No Configuration defined for RoutingAppender; required for Script element."); |
| } else { |
| final ScriptManager scriptManager = configuration.getScriptManager(); |
| scriptManager.addScript(defaultRouteScript); |
| final Bindings bindings = scriptManager.createBindings(defaultRouteScript); |
| bindings.put(STATIC_VARIABLES_KEY, scriptStaticVariables); |
| final Object object = scriptManager.execute(defaultRouteScript.getName(), bindings); |
| final Route route = routes.getRoute(Objects.toString(object, null)); |
| if (route != null) { |
| defaultRoute = route; |
| } |
| } |
| } |
| // Register all the static routes. |
| for (final Route route : routes.getRoutes()) { |
| if (route.getAppenderRef() != null) { |
| final Appender appender = configuration.getAppender(route.getAppenderRef()); |
| if (appender != null) { |
| final String key = route == defaultRoute ? DEFAULT_KEY : route.getKey(); |
| appenders.put(key, new AppenderControl(appender, null, null)); |
| } else { |
| error("Appender " + route.getAppenderRef() + " cannot be located. Route ignored"); |
| } |
| } |
| } |
| super.start(); |
| } |
| |
| @Override |
| public boolean stop(final long timeout, final TimeUnit timeUnit) { |
| setStopping(); |
| super.stop(timeout, timeUnit, false); |
| final Map<String, Appender> map = configuration.getAppenders(); |
| for (final Map.Entry<String, AppenderControl> entry : appenders.entrySet()) { |
| final Appender appender = entry.getValue().getAppender(); |
| if (!map.containsKey(appender.getName())) { |
| if (appender instanceof LifeCycle2) { |
| ((LifeCycle2) appender).stop(timeout, timeUnit); |
| } else { |
| appender.stop(); |
| } |
| } |
| } |
| setStopped(); |
| return true; |
| } |
| |
| @Override |
| public void append(LogEvent event) { |
| if (rewritePolicy != null) { |
| event = rewritePolicy.rewrite(event); |
| } |
| final String pattern = routes.getPattern(event, scriptStaticVariables); |
| final String key = pattern != null ? configuration.getStrSubstitutor().replace(event, pattern) : defaultRoute.getKey(); |
| final AppenderControl control = getControl(key, event); |
| if (control != null) { |
| control.callAppender(event); |
| } |
| |
| if (purgePolicy != null) { |
| purgePolicy.update(key, event); |
| } |
| } |
| |
| private synchronized AppenderControl getControl(final String key, final LogEvent event) { |
| AppenderControl control = appenders.get(key); |
| if (control != null) { |
| return control; |
| } |
| Route route = null; |
| for (final Route r : routes.getRoutes()) { |
| if (r.getAppenderRef() == null && key.equals(r.getKey())) { |
| route = r; |
| break; |
| } |
| } |
| if (route == null) { |
| route = defaultRoute; |
| control = appenders.get(DEFAULT_KEY); |
| if (control != null) { |
| return control; |
| } |
| } |
| if (route != null) { |
| final Appender app = createAppender(route, event); |
| if (app == null) { |
| return null; |
| } |
| control = new AppenderControl(app, null, null); |
| appenders.put(key, control); |
| } |
| |
| return control; |
| } |
| |
| private Appender createAppender(final Route route, final LogEvent event) { |
| final Node routeNode = route.getNode(); |
| for (final Node node : routeNode.getChildren()) { |
| if (node.getType().getElementName().equals(Appender.ELEMENT_TYPE)) { |
| final Node appNode = new Node(node); |
| configuration.createConfiguration(appNode, event); |
| if (appNode.getObject() instanceof Appender) { |
| final Appender app = appNode.getObject(); |
| app.start(); |
| return app; |
| } |
| error("Unable to create Appender of type " + node.getName()); |
| return null; |
| } |
| } |
| error("No Appender was configured for route " + route.getKey()); |
| return null; |
| } |
| |
| public Map<String, AppenderControl> getAppenders() { |
| return Collections.unmodifiableMap(appenders); |
| } |
| |
| /** |
| * Deletes the specified appender. |
| * |
| * @param key The appender's key |
| */ |
| public void deleteAppender(final String key) { |
| LOGGER.debug("Deleting route with " + key + " key "); |
| final AppenderControl control = appenders.remove(key); |
| if (null != control) { |
| LOGGER.debug("Stopping route with " + key + " key"); |
| control.getAppender().stop(); |
| } else { |
| LOGGER.debug("Route with " + key + " key already deleted"); |
| } |
| } |
| |
| /** |
| * Creates a RoutingAppender. |
| * @param name The name of the Appender. |
| * @param ignore If {@code "true"} (default) exceptions encountered when appending events are logged; otherwise |
| * they are propagated to the caller. |
| * @param routes The routing definitions. |
| * @param config The Configuration (automatically added by the Configuration). |
| * @param rewritePolicy A RewritePolicy, if any. |
| * @param filter A Filter to restrict events processed by the Appender or null. |
| * @return The RoutingAppender |
| * @deprecated Since 2.7; use {@link #newBuilder()} |
| */ |
| @Deprecated |
| public static RoutingAppender createAppender( |
| final String name, |
| final String ignore, |
| final Routes routes, |
| final Configuration config, |
| final RewritePolicy rewritePolicy, |
| final PurgePolicy purgePolicy, |
| final Filter filter) { |
| |
| final boolean ignoreExceptions = Booleans.parseBoolean(ignore, true); |
| if (name == null) { |
| LOGGER.error("No name provided for RoutingAppender"); |
| return null; |
| } |
| if (routes == null) { |
| LOGGER.error("No routes defined for RoutingAppender"); |
| return null; |
| } |
| return new RoutingAppender(name, filter, ignoreExceptions, routes, rewritePolicy, config, purgePolicy, null); |
| } |
| |
| public Route getDefaultRoute() { |
| return defaultRoute; |
| } |
| |
| public AbstractScript getDefaultRouteScript() { |
| return defaultRouteScript; |
| } |
| |
| public PurgePolicy getPurgePolicy() { |
| return purgePolicy; |
| } |
| |
| public RewritePolicy getRewritePolicy() { |
| return rewritePolicy; |
| } |
| |
| public Routes getRoutes() { |
| return routes; |
| } |
| |
| public Configuration getConfiguration() { |
| return configuration; |
| } |
| |
| public ConcurrentMap<Object, Object> getScriptStaticVariables() { |
| return scriptStaticVariables; |
| } |
| } |