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:
