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捕获异常时抑制堆栈跟踪

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我有一个简短的两步Spring Batch作业,它使用严格模式下的StaxEventItemReader从xml休息服务调用中读取 . 我希望它在严格模式下,因为没有连接到其余服务的能力,没有理由继续 . 我想捕获异常并使用自定义消息优雅地退出,而不是使用堆栈跟踪 .

我能够使用StepExecutionListener捕获异常,并使用afterStep()方法检查失败(stepExecution.getFailureExceptions()),但仍在输出堆栈跟踪 . 我收到自定义消息(下面的STS输出中的13:05:32,981)加上堆栈跟踪 . 当我使用带有onError方法的ItemReaderListener时,没有调用onError方法,我猜是因为它是初始化异常而不是读错误 .

捕获 failed to initialize reader 异常并从输出中抑制堆栈跟踪的最佳方法是什么?

SpringBatch工作:

<batch:job id="randomSends2NG">
		<batch:step id="getStations" next="generateAndSend">
			<batch:tasklet>
				<batch:chunk reader="getStationsFromNG_RestXML" 
							 processor="idExtractor"
							 writer="stationsWriter"
							 commit-interval="1">
				</batch:chunk>	
				<batch:listeners>
					<batch:listener ref="noStationsStopListener" />
				</batch:listeners>		
				
			</batch:tasklet>
		</batch:step>
		<batch:step id="generateAndSend">
			<batch:tasklet>
				<batch:chunk reader="readStationIdsList" 
							 processor="createRandomRequests"
							 writer="ngBroadcasterService"
							 commit-interval="400">
				</batch:chunk>			
			</batch:tasklet>
		</batch:step>
	</batch:job>

具有堆栈跟踪的STS输出:

13:05:30,479 [main] INFO  SimpleJobLauncher  - No TaskExecutor has been set, defaulting to synchronous executor.
13:05:30,776 [main] INFO  DepartmentSendCountsNoOpReader  - constructing stationSendCountsReader
LightYellow color:43
13:05:31,368 [main] INFO  ProcessStatisticsTasklet  - constructor...
13:05:31,525 [main] INFO  RequestsListReader  - constructing requestsListReader
13:05:31,588 [main] INFO  Jaxb2Marshaller  - Creating JAXBContext with classes to be bound [class com.pevco.pevcotubesystem.StationConfig]
13:05:31,886 [main] INFO  SimpleJobLauncher  - Job: [FlowJob: [name=randomSends2NG]] launched with the following parameters: [{hostNameOrIP=192.168.100.10:8383}]
13:05:31,902 [main] INFO  SimpleStepHandler  - Executing step: [getStations]
13:05:32,981 [main] ERROR AbstractStep  - Encountered an error executing step getStations in job randomSends2NG
org.springframework.batch.item.ItemStreamException: Failed to initialize the reader
	at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:147)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at com.sun.proxy.$Proxy8.open(Unknown Source)
	at org.springframework.batch.item.support.CompositeItemStream.open(CompositeItemStream.java:96)
	at org.springframework.batch.core.step.tasklet.TaskletStep.open(TaskletStep.java:310)
	at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:195)
	at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
	at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
	at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:67)
	at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:165)
	at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:144)
	at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:134)
	at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:304)
	at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
	at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
	at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
	at org.springframework.batch.core.launch.support.CommandLineJobRunner.start(CommandLineJobRunner.java:362)
	at org.springframework.batch.core.launch.support.CommandLineJobRunner.main(CommandLineJobRunner.java:590)
Caused by: java.lang.IllegalStateException: Input resource must exist (reader is in 'strict' mode)
	at org.springframework.batch.item.xml.StaxEventItemReader.doOpen(StaxEventItemReader.java:195)
	at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:144)
	... 27 more
13:05:32,981 [main] ERROR NoStationsStopListener  - Not able to get stations list from NG. Check that NG is running
13:05:32,998 [main] INFO  SimpleJobLauncher  - Job: [FlowJob: [name=randomSends2NG]] completed with the following parameters: [{hostNameOrIP=192.168.100.10:8383}] and the following status: [FAILED]
13:05:32,998 [main] INFO  ClassPathXmlApplicationContext  - Closing org.springframework.context.support.ClassPathXmlApplicationContext@4f4a7090: startup date [Wed Jul 01 13:05:29 EDT 2015]; root of context hierarchy

1 回答

  • 1

    当遇到这个问题时,最好的解决办法是尽快检查REST服务,因为"without the ability to connect to the rest service, there is no reason to continue [...] and exit gracefully with a custom message" .
    在第一步之前使用JobExecutionDecider,您可以根据服务的存在/不在来检查REST可用性并继续或结束工作 .

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