我使用spring integration 2.2.1与int-jpa：inbound-channel-adapter。我得到了例外
org.springframework.expression.spel.SpelEvaluationException：EL1004E：（pos 8）：方法调用：在foo.bar.ResponseProcessor类型上找不到方法retrieveRecords（java.util.Vector）
部署Web应用程序时。以下是spring配置文件中最密切相关的部分（重命名了一些内容）：
....
<bean id="responseProcessor"
class="foo.bar.ResponseProcessor">
</bean>
<int-jpa:inbound-channel-adapter
id="ResultsProcessor"
channel="responseChannel"
auto-startup="true"
expect-single-result="false"
delete-after-poll="false"
entity-manager-factory="entityManagerFactory"
entity-class="foo.bar.FooRequest">
<int:poller
id="responsePoller"
fixed-rate="5000"
max-messages-per-poll="10">
</int:poller>
</int-jpa:inbound-channel-adapter>
<int:channel id="responseChannel"/>
<int:service-activator
input-channel="responseChannel"
ref="responseProcessor"
method="retrieveOpenRecords" />
....
bean foo.bar.ResponseProcessor对应的类如下：
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import foo.bar.FooRequest;
public class ResponseProcessor {
/** The log. */
private static Log log = LogFactory.getLog(ResponseProcessor.class);
public void retrieveOpenRecords(FooRequest fr) {
if (fr == null) {
log.error("No open records were found");
return;
}
}
}
，以及截断的堆栈跟踪输出（再次，有一些重写）：
2018-02-28 09:41:04,811 INFO [org.springframework.context.support.DefaultLifecycleProcessor] - <Starting beans in phase 2147483647>
2018-02-28 09:41:04,817 INFO [org.springframework.integration.endpoint.SourcePollingChannelAdapter] - <started ResultsProcessor>
2018-02-28 09:41:04,821 INFO [org.springframework.web.context.ContextLoader] - <Root WebApplicationContext: initialization completed in 11377 ms>
2018-02-28 09:41:04,919 ERROR [org.springframework.integration.handler.LoggingHandler] - <org.springframework.integration.MessageHandlingException: org.springframework.expression.spel.SpelEvaluationException: EL1004E:(pos 8): Method call: Method retrieveOpenRecords(java.util.Vector) cannot be found on foo.bar.ResponseProcessor type
at org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage(MethodInvokingMessageProcessor.java:76)
at org.springframework.integration.handler.ServiceActivatingHandler.handleRequestMessage(ServiceActivatingHandler.java:67)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:134)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:73)
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:115)
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:102)
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:157)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:128)
at org.springframework.integration.core.MessagingTemplate.doSend(MessagingTemplate.java:288)
at org.springframework.integration.core.MessagingTemplate.send(MessagingTemplate.java:149)
at org.springframework.integration.endpoint.SourcePollingChannelAdapter.handleMessage(SourcePollingChannelAdapter.java:97)
at org.springframework.integration.endpoint.AbstractTransactionSynchronizingPollingEndpoint.doPoll(AbstractTransactionSynchronizingPollingEndpoint.java:82)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:146)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:144)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:236)
at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:52)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:48)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:49)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:231)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1004E:(pos 8): Method call: Method retrieveOpenRecords(java.util.Vector) cannot be found on foo.bar.ResponseProcessor type
at org.springframework.expression.spel.ast.MethodReference.findAccessorForMethod(MethodReference.java:177)
at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:101)
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:57)
at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:102)
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:102)
at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:126)
at org.springframework.integration.util.MessagingMethodInvokerHelper.processInternal(MessagingMethodInvokerHelper.java:227)
at org.springframework.integration.util.MessagingMethodInvokerHelper.process(MessagingMethodInvokerHelper.java:127)
at org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage(MethodInvokingMessageProcessor.java:73)
... 28 more
我想知道我是否在服务激活器中的某处遗漏了一些有关retrieveOpenRecords方法签名的说明？感谢任何见解。谢谢
<int-jpa:inbound-channel-adapter>的设计如下：
消息有效负载将是单个实体或实体列表
更多的是你有expect-single-result="false"，所以绝对不会只是一个FooRequest实体。
你应该这样：
public void retrieveOpenRecords(List<FooRequest> fr) {