@Override
protected void onInit() {
super.onInit();
if (this.expectMessage) {
Assert.notNull(
this.serializer, "'serializer' has to be provided where 'expectMessage == true'.");
}
if (this.taskExecutor == null) {
String beanName = this.getComponentName();
this.taskExecutor =
new SimpleAsyncTaskExecutor(
(beanName == null ? "" : beanName + "-") + this.getComponentType());
}
if (!(this.taskExecutor instanceof ErrorHandlingTaskExecutor)
&& this.getBeanFactory() != null) {
MessagePublishingErrorHandler errorHandler =
new MessagePublishingErrorHandler(new BeanFactoryChannelResolver(this.getBeanFactory()));
errorHandler.setDefaultErrorChannel(this.errorChannel);
this.taskExecutor = new ErrorHandlingTaskExecutor(this.taskExecutor, errorHandler);
}
}
protected void configurePollingEndpoint(
AbstractPollingEndpoint pollingEndpoint, List<Annotation> annotations) {
PollerMetadata pollerMetadata = null;
Poller[] pollers =
MessagingAnnotationUtils.resolveAttribute(annotations, "poller", Poller[].class);
if (!ObjectUtils.isEmpty(pollers)) {
Assert.state(
pollers.length == 1,
"The 'poller' for an Annotation-based endpoint can have only one '@Poller'.");
Poller poller = pollers[0];
String ref = poller.value();
String triggerRef = poller.trigger();
String executorRef = poller.taskExecutor();
String fixedDelayValue = this.beanFactory.resolveEmbeddedValue(poller.fixedDelay());
String fixedRateValue = this.beanFactory.resolveEmbeddedValue(poller.fixedRate());
String maxMessagesPerPollValue =
this.beanFactory.resolveEmbeddedValue(poller.maxMessagesPerPoll());
String cron = this.beanFactory.resolveEmbeddedValue(poller.cron());
String errorChannel = this.beanFactory.resolveEmbeddedValue(poller.errorChannel());
if (StringUtils.hasText(ref)) {
Assert.state(
!StringUtils.hasText(triggerRef)
&& !StringUtils.hasText(executorRef)
&& !StringUtils.hasText(cron)
&& !StringUtils.hasText(fixedDelayValue)
&& !StringUtils.hasText(fixedRateValue)
&& !StringUtils.hasText(maxMessagesPerPollValue),
"The '@Poller' 'ref' attribute is mutually exclusive with other attributes.");
pollerMetadata = this.beanFactory.getBean(ref, PollerMetadata.class);
} else {
pollerMetadata = new PollerMetadata();
if (StringUtils.hasText(maxMessagesPerPollValue)) {
pollerMetadata.setMaxMessagesPerPoll(Long.parseLong(maxMessagesPerPollValue));
} else if (pollingEndpoint instanceof SourcePollingChannelAdapter) {
// SPCAs default to 1 message per poll
pollerMetadata.setMaxMessagesPerPoll(1);
}
if (StringUtils.hasText(executorRef)) {
pollerMetadata.setTaskExecutor(this.beanFactory.getBean(executorRef, TaskExecutor.class));
}
Trigger trigger = null;
if (StringUtils.hasText(triggerRef)) {
Assert.state(
!StringUtils.hasText(cron)
&& !StringUtils.hasText(fixedDelayValue)
&& !StringUtils.hasText(fixedRateValue),
"The '@Poller' 'trigger' attribute is mutually exclusive with other attributes.");
trigger = this.beanFactory.getBean(triggerRef, Trigger.class);
} else if (StringUtils.hasText(cron)) {
Assert.state(
!StringUtils.hasText(fixedDelayValue) && !StringUtils.hasText(fixedRateValue),
"The '@Poller' 'cron' attribute is mutually exclusive with other attributes.");
trigger = new CronTrigger(cron);
} else if (StringUtils.hasText(fixedDelayValue)) {
Assert.state(
!StringUtils.hasText(fixedRateValue),
"The '@Poller' 'fixedDelay' attribute is mutually exclusive with other attributes.");
trigger = new PeriodicTrigger(Long.parseLong(fixedDelayValue));
} else if (StringUtils.hasText(fixedRateValue)) {
trigger = new PeriodicTrigger(Long.parseLong(fixedRateValue));
((PeriodicTrigger) trigger).setFixedRate(true);
}
// 'Trigger' can be null. 'PollingConsumer' does fallback to the 'new PeriodicTrigger(10)'.
pollerMetadata.setTrigger(trigger);
if (StringUtils.hasText(errorChannel)) {
MessagePublishingErrorHandler errorHandler = new MessagePublishingErrorHandler();
errorHandler.setDefaultErrorChannelName(errorChannel);
errorHandler.setBeanFactory(this.beanFactory);
pollerMetadata.setErrorHandler(errorHandler);
}
}
} else {
pollerMetadata = PollerMetadata.getDefaultPollerMetadata(this.beanFactory);
Assert.notNull(
pollerMetadata,
"No poller has been defined for Annotation-based endpoint, "
+ "and no default poller is available within the context.");
}
pollingEndpoint.setTaskExecutor(pollerMetadata.getTaskExecutor());
pollingEndpoint.setTrigger(pollerMetadata.getTrigger());
pollingEndpoint.setAdviceChain(pollerMetadata.getAdviceChain());
pollingEndpoint.setMaxMessagesPerPoll(pollerMetadata.getMaxMessagesPerPoll());
pollingEndpoint.setErrorHandler(pollerMetadata.getErrorHandler());
if (pollingEndpoint instanceof PollingConsumer) {
((PollingConsumer) pollingEndpoint).setReceiveTimeout(pollerMetadata.getReceiveTimeout());
}
pollingEndpoint.setTransactionSynchronizationFactory(
pollerMetadata.getTransactionSynchronizationFactory());
}