自定义FailureAnalyzer
FailureAnalyzer
拦截Spring Boot程序启动异常,将异常信息包装成可读性更好的消息,并且包装成FailureAnalysis
对象。Spring Boot默认提供了大量的FailureAnalyzer
。
如果要实现自定义的FailureAnalyzer
,只需要实现AbstractFailureAnalyzer
抽象类,接下来先模拟程序启动异常。
public class CustomerFailException extends RuntimeException {
}
@SpringBootApplication
public class CustomerFailureanalyzerApplication {
public static void main(String[] args) {
SpringApplication.run(CustomerFailureanalyzerApplication.class, args);
}
@Bean
public TestBean testBean() {
return new TestBean();
}
class TestBean {
public TestBean() {
throw new CustomerFailException();
}
}
}
程序启动报错如下:
接下来自定义FailureAnalyzer
,处理CustomerFailException
异常。
1、 创建自定义FailureAnalyzer
继承AbstractFailureAnalyzer
;
public class ArithmeticExceptionFailureAnalyzer extends AbstractFailureAnalyzer<CustomerFailException> {
@Override
protected FailureAnalysis analyze(Throwable rootFailure, CustomerFailException cause) {
return new FailureAnalysis(cause.getMessage(), "检测Bean初始化是否正常!", cause);
}
}
2、 注册自定义FailureAnalyzer
,在resources
目录新建META-INF/spring.factories
文件,添加如下内容:;
org.springframework.boot.diagnostics.FailureAnalyzer=com.example.customerfailureanalyzer.ArithmeticExceptionFailureAnalyzer
3、 启动应用程序;
注意:main线程抛出的异常无法处理,如下例子:
@SpringBootApplication
public class CustomerFailureanalyzerApplication {
public static void main(String[] args) {
TestBean testBean=new TestBean();
SpringApplication.run(CustomerFailureanalyzerApplication.class, args);
}
static class TestBean {
public TestBean() {
throw new CustomerFailException();
}
}
}
启动程序:
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