Camel route and MyBatis - apache-camel

Question

I am relatively new to Camel and i've been struggling with a problem with a simple route that uses MyBatis to "feed" an ActiveMQ queue.
My route is as follows:
public class SearchItemProductionRouteRoute extends SpringRouteBuilder {
#Override
public void configure() throws Exception {
from("timer://pollTheDatabase?delay=5000")
.to("mybatis:selectSearchItem?statementType=SelectList&consumer.useIterator=true&consumer.onConsume=updateProcessingSearchItem")
.to("bean:searchItemProcesser?method=process")
.to("activemq:searchitemqueue");
}
}
The mybatis query is working fine. The query itself brings 4 records from the database. My need is that each row should become a message in the queue, but instead, i get 1 message with all the 4 rows in it.
The searchItemProcessor just prints de body of the message (thats how i know that the message contains all 4 records).
These are the queries that the above route uses:
<select id="selectSearchItem" resultMap="result" parameterType="java.util.HashMap">
SELECT * FROM SEARCH_REQUEST_ITEM SRI WHERE SRI.STATUS = '1'
</select>
<update id="updateProcessingSearchItem">
UPDATE SEARCH_REQUEST_ITEM SET STATUS = 2,
UPDATEDIN=SYSDATE, UPDATEDBY='XDRBATCH'
WHERE ID = #{ID}
</update>
If anyone can shed some light over this i'll be thankful!
EDIT:
Just found one workaround using the Splitter EIP. First i created this class:
public class XdrMessageSplitterBean {
#SuppressWarnings({ "rawtypes", "unchecked" })
public List<HashMap> splitBody(Object body) {
return (List<HashMap>) body;
}
}
Then add it to the route:
public void configure() throws Exception {
from("timer://pollTheDatabase?delay=5000")
.to("mybatis:selectSearchItem?statementType=SelectList&consumer.useIterator=true&consumer.onConsume=updateProcessingSearchItem")
.split().method("xdrMessageSplitterBean", "splitBody")
.to("bean:searchItemProcesser?method=process")
.to("activemq:searchitemqueue");
}
The bean must be declared in the camel-context.xml file:
<bean id="xdrMessageSplitterBean" name="xdrMessageSplitterBean"
class="package.of.bean.XdrMessageSplitterBean" />
It works, but does not feel right. If anyone has any suggestion it will be very welcomed.

Answer 1

You can consume from mybatis directly, and specify the polling frequency. You dont need the timer for that. There is a delay option you can use to set = 5000 for 5 seconds frequency.
public void configure() throws Exception {
from("mybatis:selectSearchItem?statementType=SelectList&consumer.useIterator=true&consumer.onConsume=updateProcessingSearchItem&delay=5000")
.split().method("xdrMessageSplitterBean", "splitBody")
.to("bean:searchItemProcesser?method=process")
.to("activemq:searchitemqueue");
}

Answer 2

I'd say you found the right way to do it. You should not consider it a workaround.
Actually, since mybatis returns a List I'm not even sure you need the "XdrMessageSplitterBean".