/*
* 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.sling.commons.log.logback.internal;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.core.joran.action.Action;
import ch.qos.logback.core.joran.action.ActionConst;
import ch.qos.logback.core.joran.spi.ActionException;
import ch.qos.logback.core.joran.spi.InterpretationContext;
import ch.qos.logback.core.util.OptionHelper;
import org.xml.sax.Attributes;
/**
* Joran action enabling referring to OSGi based appenders from within Logback config file. It is based on
* {@link ch.qos.logback.core.joran.action.AppenderRefAction}.
*/
public class OsgiAppenderRefInternalAction extends Action {
static String OSGI_APPENDER_REF_BAG = "OSGI_APPENDER_BAG";
boolean inError = false;
@Override
public void begin(InterpretationContext ec, String tagName, Attributes attributes) throws ActionException {
// Let us forget about previous errors (in this object)
inError = false;
Object o = ec.peekObject();
if (!(o instanceof Logger)) {
String errMsg = "Could not find an Logger at the top of execution stack. Near ["
+ tagName + "] line " + getLineNumber(ec);
inError = true;
addError(errMsg);
return;
}
Logger logger = (Logger) o;
String appenderName = ec.subst(attributes.getValue(ActionConst.REF_ATTRIBUTE));
if (OptionHelper.isEmpty(appenderName)) {
// print a meaningful error message and return
String errMsg = "Missing appender ref attribute in <appender-ref> tag.";
inError = true;
addError(errMsg);
return;
}
@SuppressWarnings("unchecked")
Map<String, Set<String>> appenderBag =
(Map<String, Set<String>>) ec.getObjectMap().get(OSGI_APPENDER_REF_BAG);
if(appenderBag == null){
appenderBag = new HashMap<String, Set<String>>();
ec.getObjectMap().put(OSGI_APPENDER_REF_BAG,appenderBag);
}
Set<String> loggers = appenderBag.get(appenderName);
if(loggers == null){
loggers = new HashSet<String>();
appenderBag.put(appenderName,loggers);
}
loggers.add(logger.getName());
}
@Override
public void end(InterpretationContext ic, String name) throws ActionException {
}
}