spring ExtendedWhitespaceThrowablePatternConverter 源码
springboot ExtendedWhitespaceThrowablePatternConverter 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/log4j2/ExtendedWhitespaceThrowablePatternConverter.java
/*
* Copyright 2012-2019 the original author or authors.
*
* 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
*
* https://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.springframework.boot.logging.log4j2;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.pattern.ConverterKeys;
import org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverter;
import org.apache.logging.log4j.core.pattern.PatternConverter;
import org.apache.logging.log4j.core.pattern.ThrowablePatternConverter;
/**
* {@link ThrowablePatternConverter} that adds some additional whitespace around the stack
* trace.
*
* @author Vladimir Tsanev
* @author Phillip Webb
* @since 1.3.0
*/
@Plugin(name = "ExtendedWhitespaceThrowablePatternConverter", category = PatternConverter.CATEGORY)
@ConverterKeys({ "xwEx", "xwThrowable", "xwException" })
public final class ExtendedWhitespaceThrowablePatternConverter extends ThrowablePatternConverter {
private final ExtendedThrowablePatternConverter delegate;
private ExtendedWhitespaceThrowablePatternConverter(Configuration configuration, String[] options) {
super("WhitespaceExtendedThrowable", "throwable", options, configuration);
this.delegate = ExtendedThrowablePatternConverter.newInstance(configuration, options);
}
@Override
public void format(LogEvent event, StringBuilder buffer) {
if (event.getThrown() != null) {
buffer.append(this.options.getSeparator());
this.delegate.format(event, buffer);
buffer.append(this.options.getSeparator());
}
}
/**
* Creates a new instance of the class. Required by Log4J2.
* @param configuration current configuration
* @param options pattern options, may be null. If first element is "short", only the
* first line of the throwable will be formatted.
* @return a new {@code WhitespaceThrowablePatternConverter}
*/
public static ExtendedWhitespaceThrowablePatternConverter newInstance(Configuration configuration,
String[] options) {
return new ExtendedWhitespaceThrowablePatternConverter(configuration, options);
}
}
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