/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* Licensed 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.joran.action;
import org.apache.joran.ExecutionContext;
import org.apache.joran.action.Action;
import org.apache.joran.helper.Option;
import org.apache.log4j.Appender;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.AppenderAttachable;
import org.apache.log4j.spi.ErrorItem;
import org.xml.sax.Attributes;
import java.util.HashMap;
public class AppenderRefAction extends Action {
//static final Logger logger = Logger.getLogger(AppenderRefAction.class);
boolean inError = false;
public void begin(
ExecutionContext ec, String tagName, Attributes attributes) {
// Let us forget about previous errors (in this object)
inError = false;
//logger.debug("begin called");
Object o = ec.peekObject();
if (!(o instanceof AppenderAttachable)) {
String errMsg =
"Could not find an AppenderAttachable at the top of execution stack. Near <"
+ tagName + "> line " + getLineNumber(ec);
getLogger().warn(errMsg);
inError = true;
ec.addError(new ErrorItem(errMsg));
return;
}
AppenderAttachable appenderAttachable = (AppenderAttachable) o;
String appenderName = attributes.getValue(ActionConst.REF_ATTRIBUTE);
if (Option.isEmpty(appenderName)) {
// print a meaningful error message and return
String errMsg = "Missing appender ref attribute in <appender-ref> tag.";
getLogger().warn(errMsg);
inError = true;
ec.addError(new ErrorItem(errMsg));
return;
}
HashMap appenderBag =
(HashMap) ec.getObjectMap().get(ActionConst.APPENDER_BAG);
Appender appender = (Appender) appenderBag.get(appenderName);
if (appender == null) {
getLogger().warn("Could not find an appender named [" + appenderName + "]");
inError = true;
ec.addError(new ErrorItem("Could not find an appender named [" + appenderName + "]"));
return;
}
if (appenderAttachable instanceof Logger) {
getLogger().debug(
"Attaching appender named [{}] to logger named [{}].", appenderName, (
(Logger) appenderAttachable).getName());
} else {
getLogger().debug(
"Attaching appender named [{}] to {}.", appenderName, appenderAttachable);
}
appenderAttachable.addAppender(appender);
}
public void end(ExecutionContext ec, String n) {
}
public void finish(ExecutionContext ec) {
}
}