dynamic delay configuration in spring poller - spring-integration

Question

Polling dynamically
I am using poller component from integration to poll files from s3.The fixed delay is 15 min and max message rate is 1 .The reason i did this was in down stream messages in xd were clogging since I am using http.Now this is file for 100k records file but when file size is small i still wait 15 min though i can process fast.Now is there any way to dynamically set delay depending in size of file.Because we don't know which files will be polled also to know it?Depending on file size i will pick up or number of records can we change dynamically the fixed delay or fixed rate?
<int:poller fixed-delay="${fixedDelay}" default="true" max-messages-per-poll="${maxMessageRate}">
<int:advice-chain>
<ref bean="pollAdvise"/>
</int:advice-chain>
</int:poller>
<bean id="pollAdvise" class="org.springframework.integration.scheduling.PollSkipAdvice">
<constructor-arg ref="healthCheckStrategy"/>
</bean>
<bean id="healthCheckStrategy" class="test.ServiceHealthCheckPollSkipStrategy">
<property name="url" value="${url}"/>
<property name="doHealthCheck" value="${doHealthCheck}"/>
</bean>
<bean id="credentials" class="org.springframework.integration.aws.core.BasicAWSCredentials">
<property name="accessKey" value="${accessKey}"/>
<property name="secretKey" value="${secretKey}"/>
</bean>
<bean id="clientConfiguration" class="com.amazonaws.ClientConfiguration">
<property name="proxyHost" value="${proxyHost}"/>
<property name="proxyPort" value="${proxyPort}"/>
<property name="preemptiveBasicProxyAuth" value="false"/>
</bean>
<bean id="s3Operations" class="org.springframework.integration.aws.s3.core.CustomC1AmazonS3Operations">
<constructor-arg index="0" ref="credentials"/>
<constructor-arg index="1" ref="clientConfiguration"/>
<property name="awsEndpoint" value="s3.amazonaws.com"/>
<property name="temporaryDirectory" value="${temporaryDirectory}"/>
<property name="awsSecurityKey" value="${awsSecurityKey}"/>
</bean>
<!-- aws-endpoint="https://s3.amazonaws.com" -->
<int-aws:s3-inbound-channel-adapter aws-endpoint="s3.amazonaws.com"
bucket="${bucket}"
s3-operations="s3Operations"
credentials-ref="credentials"
file-name-wildcard="${fileNameWildcard}"
remote-directory="${remoteDirectory}"
channel="splitChannel"
local-directory="${localDirectory}"
accept-sub-folders="false"
delete-source-files="true"
archive-bucket="${archiveBucket}"
archive-directory="${archiveDirectory}">
</int-aws:s3-inbound-channel-adapter>
<int-file:splitter id="s3splitter" input-channel="splitChannel" output-channel="bridge" markers="false" charset="UTF-8">
<int-file:request-handler-advice-chain>
<bean class="org.springframework.integration.handler.advice.ExpressionEvaluatingRequestHandlerAdvice">
<property name="onSuccessExpression" value="payload.delete()"/>
</bean>
</int-file:request-handler-advice-chain>
</int-file:splitter>

Answer 1

Starting with Spring Integration 4.2 the AbstractMessageSourceAdvice has been introduced:
This method is called after the receive() method; again, you can reconfigure the source, or take any action perhaps depending on the result (which can be null if there was no message created by the source). You can even return a different message!
Starting with version 4.3 we introduce CompoundTriggerAdvice: http://docs.spring.io/spring-integration/docs/4.3.0.BUILD-SNAPSHOT/reference/html/messaging-channels-section.html#_compoundtriggeradvice
Which you can use for your use-case based on the payload size.