java - 定义 Bean 时没有限定 Bean

Question

我一直在尝试进行设置，创建 PostDatedAchInReader ，它实现 JdbcCursorItemReader ，然后将其注入(inject)到 PostDatedAchInAggregatingJdbcItemReader 中，后者根据特定条件收集读取对象，并将它们分组到一个列表中，基本上按客户端 ID 保留所有 ach 请求组。但是，我不断收到无合格 bean 错误，但 bean 已在此处并已定义。我很困惑问题是什么或如何解决它。

所以我有以下配置文件

@Configuration
public class PostDatedAchInBatchConfig extends AbstractCommonBatchJobConfig {

    private static final String ACH_FULFILLMENT_POST_DATED_ACH_IN_STEP1_NAME =
            "achFulfillment_postDatedAchInJob_step1_scheduleAchIns";

    @Autowired
    DataSource prodDataSource;

    /**
     * This method defines the Job.
     *
     * @return postdatedachinjob
     *         return the configured job.
     */
    @Bean(name = "achFulfillmentPostDatedAchInJob")
    public Job job() throws Exception {
        mmLogMgr.info("AchFulfillmentEmailBatchConfig : job");
        return getJobBuilderFactory().get("achFulfillmentPostDatedAchInJob")
                .listener(postDatedAchInListener())
                .start(step1())
                .on(ExitStatus.COMPLETED.getExitCode())
                .end() // end of TransactionBuilder
                .end() // end of FlowBuilder
                .build();

    }

..

    /**
     * @return postDatedAchInAggregatingJdbcItemReader.
     */
    @Bean
    @Scope(value = "step", proxyMode = ScopedProxyMode.DEFAULT)
    public ItemReader<ArrayList<PostDatedAchIn>> postDatedAchInAggregatingJdbcItemReader(@Qualifier("postDatedAchInReader") final PostDatedAchInReader postDatedAchInReader)
            throws Exception {
        PostDatedAchInAggregatingJdbcItemReader postDatedAchInAggregatingJdbcItemReader =
                new PostDatedAchInAggregatingJdbcItemReader();
        postDatedAchInAggregatingJdbcItemReader.setDatabaseItemReader(postDatedAchInReader);
        return postDatedAchInAggregatingJdbcItemReader;
    }

    @Bean
    public PostDatedAchInClassifierWriter postDatedAchInClassifierWriter() {
        Map<String, ItemWriter<PostDatedAchIn>> classMap = new HashMap<String, ItemWriter<PostDatedAchIn>>();
        classMap.put("true", postDatedAchInCompositeWriterOneTimeFailure());
        classMap.put("false", postDatedAchInCompositeWriterPosted());
        PostDatedAchInClassifierWriter classifyWriter = new PostDatedAchInClassifierWriter();
        classifyWriter.setClassMap(classMap);
        return classifyWriter;
    }


..

    @Bean(name = "postDatedAchInReader")
    @Scope(value = "step", proxyMode = ScopedProxyMode.DEFAULT)
    public PostDatedAchInReader postDatedAchInReader(@Value("#{jobExecutionContext['current.business.date']}") final String currentBusinessDate) {

        SqlStatementHelper sqlStatementHelper = new SqlStatementHelper(PostDatedAchInConstants.POST_DATED_ACH_IN_PROPERTY_FILE,
                PostDatedAchInConstants.POST_DATED_ACH_IN_PROPERTY_ALT_FILE);
        String sqlStatement = sqlStatementHelper.getSqlStatement(PostDatedAchInConstants.RETRIEVE_POST_DATED_ACH_IN);

        ArrayList<String> parameters = new ArrayList<String>();
        parameters.add(currentBusinessDate);
        parameters.add(currentBusinessDate);
        parameters.add(currentBusinessDate);

        ListPreparedStatementSetter preparedStatementSetter = new ListPreparedStatementSetter();
        preparedStatementSetter.setParameters(parameters);

        PostDatedAchInReader postDatedAchInReader = new PostDatedAchInReader();
        postDatedAchInReader.setDataSource(prodDataSource);
        postDatedAchInReader.setSql(sqlStatement);
        postDatedAchInReader.setRowMapper(new PostDatedAchInRowMapper());
        postDatedAchInReader.setPreparedStatementSetter(preparedStatementSetter);

        return postDatedAchInReader;
    }

    /**
     * This method defines the Steps, it writes 1 record at a time.
     *
     * @return postdatedachinjob_step1
     *
     */
    @Bean(name = ACH_FULFILLMENT_POST_DATED_ACH_IN_STEP1_NAME)
    public Step step1() throws Exception {
        mmLogMgr.info(ACH_FULFILLMENT_POST_DATED_ACH_IN_STEP1_NAME);
        return getStepBuilderFactory().get(ACH_FULFILLMENT_POST_DATED_ACH_IN_STEP1_NAME)
                .<ArrayList<PostDatedAchIn>, ArrayList<PostDatedAchIn>> chunk(AchFulfillmentBatchJobUtil
                        .getChunkValue("postdatedachin"))
                .reader(postDatedAchInAggregatingJdbcItemReader(null))
                .processor(postDatedAchInProcessor())
                .writer(postDatedAchInClassifierWriter())
                .build();
    }

}

当我运行作业时，我得到以下堆栈跟踪:

2018-10-31 15:06:45,821 ERROR [o.s.batch.core.step.AbstractStep:AbstractStep.java:execute:229 - main] - Encountered an error executing step achFulfillment_postDatedAchInJob_step1_scheduleAchIns in job achFulfillmentPostDatedAchInJob
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'scopedTarget.postDatedAchInAggregatingJdbcItemReader' defined in com.tdameritrade.ctg.ach.batch.postdatedachinjob.PostDatedAchInBatchConfig: Unsatisfied dependency expressed through method 'postDatedAchInAggregatingJdbcItemReader' parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.tdameritrade.ctg.ach.batch.postdatedachinjob.PostDatedAchInReader' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Qualifier(value=postDatedAchInReader)}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:467)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$2.getObject(AbstractBeanFactory.java:345)
    at org.springframework.batch.core.scope.StepScope.get(StepScope.java:113)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:340)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:192)
    at com.sun.proxy.$Proxy112.read(Unknown Source)
    at org.springframework.batch.core.step.item.SimpleChunkProvider.doRead(SimpleChunkProvider.java:91)
    at org.springframework.batch.core.step.item.SimpleChunkProvider.read(SimpleChunkProvider.java:157)
    at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:116)
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374)
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
    at org.springframework.batch.core.step.item.SimpleChunkProvider.provide(SimpleChunkProvider.java:110)
    at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:69)
    at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406)
    at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
    at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:272)
    at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:81)
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374)
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
    at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257)
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:200)
    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:169)
    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:306)
    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 com.tdameritrade.ctg.ach.fulfillment.util.MoneyMovementHelper.getJobExecution(MoneyMovementHelper.java:155)
    at com.tdameritrade.ctg.ach.fulfillment.util.MoneyMovementHelper.getJobExecution(MoneyMovementHelper.java:136)
    at com.tdameritrade.ctg.ach.batch.postdatedachinjob.PostDatedAchInBatchConfigTest.testLaunchJob(PostDatedAchInBatchConfigTest.java:32)
    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:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.tdameritrade.ctg.ach.batch.postdatedachinjob.PostDatedAchInReader' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Qualifier(value=postDatedAchInReader)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1493)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
    ... 72 common frames omitted

我很困惑，当它在类中定义时，它如何说找不到该类型的 bean。

我该如何解决这个问题？

Answer 1

因此，我们能够通过更改步骤配置中对聚合读取器的调用来发送游标读取器的方法/bean 来解决此问题。我们更改了这一行:

.reader(postDatedAchInAggregatingJdbcItemReader(postDatedAchInReader()))

并删除了@Qualifier。这停止了​​这个错误，并且它确实正确地连接了所有东西。对我来说有点笨拙，但它有效。如果有人有其他解决方案，我愿意接受。