springboot的SpringPropertyAction事务属性源码解读
作者：codecraft
这篇文章主要介绍了springboot的SpringPropertyAction事务属性源码解读,有需要的朋友可以借鉴参考下,希望能够有所帮助,祝大家多多进步,早日升职加薪
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本文主要研究一下springboot的SpringPropertyAction
SpringBootJoranConfigurator
org/springframework/boot/logging/logback/SpringBootJoranConfigurator.java
class SpringBootJoranConfigurator extends JoranConfigurator {
private LoggingInitializationContext initializationContext;
SpringBootJoranConfigurator(LoggingInitializationContext initializationContext) {
this.initializationContext = initializationContext;
}
@Override
public void addInstanceRules(RuleStore rs) {
super.addInstanceRules(rs);
Environment environment = this.initializationContext.getEnvironment();
rs.addRule(new ElementSelector("configuration/springProperty"), new SpringPropertyAction(environment));
rs.addRule(new ElementSelector("*/springProfile"), new SpringProfileAction(environment));
rs.addRule(new ElementSelector("*/springProfile/*"), new NOPAction());
}
}SpringBootJoranConfigurator继承了JoranConfigurator，其addInstanceRules添加了configuration/springProperty的动作为SpringPropertyAction
SpringPropertyAction
org/springframework/boot/logging/logback/SpringPropertyAction.java
class SpringPropertyAction extends Action {
private static final String SOURCE_ATTRIBUTE = "source";
private static final String DEFAULT_VALUE_ATTRIBUTE = "defaultValue";
private final Environment environment;
SpringPropertyAction(Environment environment) {
this.environment = environment;
}
@Override
public void begin(InterpretationContext context, String elementName, Attributes attributes) throws ActionException {
String name = attributes.getValue(NAME_ATTRIBUTE);
String source = attributes.getValue(SOURCE_ATTRIBUTE);
Scope scope = ActionUtil.stringToScope(attributes.getValue(SCOPE_ATTRIBUTE));
String defaultValue = attributes.getValue(DEFAULT_VALUE_ATTRIBUTE);
if (OptionHelper.isEmpty(name) || OptionHelper.isEmpty(source)) {
addError("The \"name\" and \"source\" attributes of <springProperty> must be set");
}
ActionUtil.setProperty(context, name, getValue(source, defaultValue), scope);
}
private String getValue(String source, String defaultValue) {
if (this.environment == null) {
addWarn("No Spring Environment available to resolve " + source);
return defaultValue;
}
return this.environment.getProperty(source, defaultValue);
}
@Override
public void end(InterpretationContext context, String name) throws ActionException {
}
}SpringPropertyAction继承了Action，它的主要功能就是允许从spring的environment中读取logback的配置；其getValue方法从environment中读取属性，然后通过ActionUtil.setProperty写入到InterpretationContext中
示例
<property name="LOGS" value="./logs" />
<springProperty scope="context" name="application.name" source="spring.application.name" />
<springProfile name="production">
<appender name="RollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${LOGS}/${application.name}.log</file>
<!-- configuration -->
</appender>
</springProfile>这里通过springProperty定义了application.name属性，其从spring environment读取key为spring.application.name的值作为application.name的值
小结
springboot的logback可以通过springProperty来引用spring environment中的属性在logback的配置文件中使用，其主要是通过SpringPropertyAction来实现的。
以上就是springboot的SpringPropertyAction事务属性源码解读的详细内容，更多关于springboot SpringPropertyAction的资料请关注脚本之家其它相关文章！