org.apache.rocketmq.shaded.ch.qos.logback.core.joran.action.DefinePropertyAction Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package org.apache.rocketmq.shaded.ch.qos.logback.core.joran.action;
import org.apache.rocketmq.shaded.ch.qos.logback.core.joran.action.ActionUtil.Scope;
import org.apache.rocketmq.shaded.ch.qos.logback.core.joran.spi.InterpretationContext;
import org.apache.rocketmq.shaded.ch.qos.logback.core.joran.spi.ActionException;
import org.apache.rocketmq.shaded.ch.qos.logback.core.spi.LifeCycle;
import org.apache.rocketmq.shaded.ch.qos.logback.core.util.OptionHelper;
import org.apache.rocketmq.shaded.ch.qos.logback.core.spi.PropertyDefiner;
import org.xml.sax.Attributes;
/**
* Instantiate class for define property value. Get future property name and
* property definer class from attributes. Some property definer properties
* could be used. After defining put new property to context.
*
* @author Aleksey Didik
*/
public class DefinePropertyAction extends Action {
String scopeStr;
Scope scope;
String propertyName;
PropertyDefiner definer;
boolean inError;
public void begin(InterpretationContext ec, String localName, Attributes attributes) throws ActionException {
// reset variables
scopeStr = null;
scope = null;
propertyName = null;
definer = null;
inError = false;
// read future property name
propertyName = attributes.getValue(NAME_ATTRIBUTE);
scopeStr = attributes.getValue(SCOPE_ATTRIBUTE);
scope = ActionUtil.stringToScope(scopeStr);
if (OptionHelper.isEmpty(propertyName)) {
addError("Missing property name for property definer. Near [" + localName + "] line " + getLineNumber(ec));
inError = true;
return;
}
// read property definer class name
String className = attributes.getValue(CLASS_ATTRIBUTE);
if (OptionHelper.isEmpty(className)) {
addError("Missing class name for property definer. Near [" + localName + "] line " + getLineNumber(ec));
inError = true;
return;
}
// try to instantiate property definer
try {
addInfo("About to instantiate property definer of type [" + className + "]");
definer = (PropertyDefiner) OptionHelper.instantiateByClassName(className, PropertyDefiner.class, context);
definer.setContext(context);
if (definer instanceof LifeCycle) {
((LifeCycle) definer).start();
}
ec.pushObject(definer);
} catch (Exception oops) {
inError = true;
addError("Could not create an PropertyDefiner of type [" + className + "].", oops);
throw new ActionException(oops);
}
}
/**
* Now property definer is initialized by all properties and we can put
* property value to context
*/
public void end(InterpretationContext ec, String name) {
if (inError) {
return;
}
Object o = ec.peekObject();
if (o != definer) {
addWarn("The object at the of the stack is not the property definer for property named [" + propertyName + "] pushed earlier.");
} else {
addInfo("Popping property definer for property named [" + propertyName + "] from the object stack");
ec.popObject();
// let's put defined property and value to context but only if it is
// not null
String propertyValue = definer.getPropertyValue();
if (propertyValue != null) {
ActionUtil.setProperty(ec, propertyName, propertyValue, scope);
}
}
}
}