监控和指标

import io.micrometer.core.instrument.Metrics;
import io.micrometer.core.instrument.Timer;

import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;

public class MyTimedTasklet implements Tasklet {

	@Override
	public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) {
		Timer.Sample sample = Timer.start(Metrics.globalRegistry);
		String status = "success";
		try {
			// do some work
		} catch (Exception e) {
			// handle exception
			status = "failure";
		} finally {
			sample.stop(Timer.builder("my.tasklet.timer")
					.description("Duration of MyTimedTasklet")
					.tag("status", status)
					.register(Metrics.globalRegistry));
		}
		return RepeatStatus.FINISHED;
	}
}



Disabling Metrics

Metrics collection is a concern similar to logging. Disabling logs is typically
done by configuring the logging library, and this is no different for metrics.
There is no feature in Spring Batch to disable Micrometer’s metrics. This should
be done on Micrometer’s side. Since Spring Batch stores metrics in the global
registry of Micrometer with the spring.batch prefix, you can configure
micrometer to ignore or deny batch metrics with the following snippet:spring-doc.cadn.net.cn



Metrics.globalRegistry.config().meterFilter(MeterFilter.denyNameStartsWith("spring.batch"))




See Micrometer’s reference documentation
for more details.spring-doc.cadn.net.cn



Tracing


As of version 5, Spring Batch provides tracing through Micrometer’s Observation API. By default, tracing is enabled
when using @EnableBatchProcessing. Spring Batch will create a trace for each job execution and a span for each
step execution.spring-doc.cadn.net.cn


If you do not use EnableBatchProcessing, you need to register a BatchObservabilityBeanPostProcessor in your
application context, which will automatically setup Micrometer’s observability in your jobs and steps beans.spring-doc.cadn.net.cn