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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.log4j.builders.appender;
import static org.apache.log4j.builders.BuilderManager.CATEGORY;
import static org.apache.log4j.config.Log4j1Configuration.APPENDER_REF_TAG;
import static org.apache.log4j.config.Log4j1Configuration.THRESHOLD_PARAM;
import static org.apache.log4j.xml.XmlConfiguration.FILTER_TAG;
import static org.apache.log4j.xml.XmlConfiguration.PARAM_TAG;
import static org.apache.log4j.xml.XmlConfiguration.forEachElement;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.log4j.Appender;
import org.apache.log4j.bridge.AppenderWrapper;
import org.apache.log4j.bridge.RewritePolicyAdapter;
import org.apache.log4j.bridge.RewritePolicyWrapper;
import org.apache.log4j.builders.AbstractBuilder;
import org.apache.log4j.config.Log4j1Configuration;
import org.apache.log4j.config.PropertiesConfiguration;
import org.apache.log4j.helpers.OptionConverter;
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.core.appender.rewrite.RewriteAppender;
import org.apache.logging.log4j.core.config.AppenderRef;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.status.StatusLogger;
import org.apache.logging.log4j.util.Strings;
import org.w3c.dom.Element;
/**
* Build an Asynch Appender
*/
@Plugin(name = "org.apache.log4j.rewrite.RewriteAppender", category = CATEGORY)
public class RewriteAppenderBuilder extends AbstractBuilder implements AppenderBuilder {
private static final Logger LOGGER = StatusLogger.getLogger();
private static final String REWRITE_POLICY_TAG = "rewritePolicy";
public RewriteAppenderBuilder() {
}
public RewriteAppenderBuilder(final String prefix, final Properties props) {
super(prefix, props);
}
@Override
public Appender parseAppender(final Element appenderElement, final XmlConfiguration config) {
final String name = getNameAttribute(appenderElement);
final AtomicReference> appenderRefs = new AtomicReference<>(new ArrayList<>());
final AtomicReference rewritePolicyHolder = new AtomicReference<>();
final AtomicReference level = new AtomicReference<>();
final AtomicReference filter = new AtomicReference<>();
forEachElement(appenderElement.getChildNodes(), currentElement -> {
switch (currentElement.getTagName()) {
case APPENDER_REF_TAG:
final Appender appender = config.findAppenderByReference(currentElement);
if (appender != null) {
appenderRefs.get().add(appender.getName());
}
break;
case REWRITE_POLICY_TAG:
final RewritePolicy policy = config.parseRewritePolicy(currentElement);
if (policy != null) {
rewritePolicyHolder.set(policy);
}
break;
case FILTER_TAG:
config.addFilter(filter, currentElement);
break;
case PARAM_TAG:
if (getNameAttributeKey(currentElement).equalsIgnoreCase(THRESHOLD_PARAM)) {
set(THRESHOLD_PARAM, currentElement, level);
}
break;
}
});
return createAppender(name, level.get(), appenderRefs.get().toArray(Strings.EMPTY_ARRAY), rewritePolicyHolder.get(),
filter.get(), config);
}
@Override
public Appender parseAppender(final String name, final String appenderPrefix, final String layoutPrefix,
final String filterPrefix, final Properties props, final PropertiesConfiguration configuration) {
final String appenderRef = getProperty(APPENDER_REF_TAG);
final Filter filter = configuration.parseAppenderFilters(props, filterPrefix, name);
final String policyPrefix = appenderPrefix + ".rewritePolicy";
final String className = getProperty(policyPrefix);
final RewritePolicy policy = configuration.getBuilderManager().parse(className, policyPrefix, props, configuration);
final String level = getProperty(THRESHOLD_PARAM);
if (appenderRef == null) {
LOGGER.warn("No appender references configured for AsyncAppender {}", name);
return null;
}
final Appender appender = configuration.parseAppender(props, appenderRef);
if (appender == null) {
LOGGER.warn("Cannot locate Appender {}", appenderRef);
return null;
}
return createAppender(name, level, new String[] {appenderRef}, policy, filter, configuration);
}
private Appender createAppender(final String name, final String level,
final String[] appenderRefs, final RewritePolicy policy, final Filter filter, final T configuration) {
final org.apache.logging.log4j.Level logLevel = OptionConverter.convertLevel(level,
org.apache.logging.log4j.Level.TRACE);
final AppenderRef[] refs = new AppenderRef[appenderRefs.length];
int index = 0;
for (final String appenderRef : appenderRefs) {
refs[index++] = AppenderRef.createAppenderRef(appenderRef, logLevel, null);
}
final org.apache.logging.log4j.core.Filter rewriteFilter = buildFilters(level, filter);
org.apache.logging.log4j.core.appender.rewrite.RewritePolicy rewritePolicy;
if (policy instanceof RewritePolicyWrapper) {
rewritePolicy = ((RewritePolicyWrapper) policy).getPolicy();
} else {
rewritePolicy = new RewritePolicyAdapter(policy);
}
return new AppenderWrapper(RewriteAppender.createAppender(name, "true", refs, configuration,
rewritePolicy, rewriteFilter));
}
}
