Spring Integration - MongoDB inbound channel adapter not working - spring-integration

Question

I have configured a MongoDB inbound channel adapter. However, the inbound channel adapter is not working as expected. I tried outbound channel adapter and was successful to write some content to DB. It seems the connection is successful but the data retrieval is not successful. I don't see anything is log as well. Can anyone point out what I am missing?
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:int="http://www.springframework.org/schema/integration"
xmlns:int-jms="http://www.springframework.org/schema/integration/jms"
xmlns:int-mongodb="http://www.springframework.org/schema/integration/mongodb"
xmlns:int-http="http://www.springframework.org/schema/integration/http"
xsi:schemaLocation="http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
http://www.springframework.org/schema/integration/jms http://www.springframework.org/schema/integration/jms/spring-integration-jms-2.0.xsd
http://www.springframework.org/schema/integration/mongodb http://www.springframework.org/schema/integration/mongodb/spring-integration-mongodb.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/integration/http http://www.springframework.org/schema/integration/http/spring-integration-http.xsd">
<bean id="mongoDBFactory"
class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
<constructor-arg name="mongo">
<bean class="com.mongodb.Mongo">
<constructor-arg name="host" value="localhost" />
<constructor-arg name="port" value="27017" />
</bean>
</constructor-arg>
<constructor-arg name="databaseName" value="test" />
</bean>
<int-mongodb:inbound-channel-adapter
id="mongoInboundAdapter" channel="mongoChannel" expect-single-result="true"
query="{'_id' : '10'}" entity-class="com.test.si.prototype.model.Order"
collection-name="orders" auto-startup="false"
mongodb-factory="mongoDBFactory">
<int:poller fixed-rate="1000" />
</int-mongodb:inbound-channel-adapter>
<int:channel id="mongoChannel" />
<int:logging-channel-adapter id="logger"
auto-startup="true" log-full-message="true" level="INFO" channel="mongoChannel" />
<int:service-activator input-channel="mongoChannel"
ref="messageListenerImpl" method="processMessage" />
<bean id="messageListenerImpl" class="com.test.si.prototype.service.MessageListenerImpl"></bean>
</beans>

Answer 1

First of all your <int-mongodb:inbound-channel-adapter> is marked with auto-startup="false". So, it isn't going to poll data from DB until you start() mongoInboundAdapter manually.
From other side you should understand that query="{'_id' : '10'}" isn't good. Because you will retrive from the DB only the single document and only if it has an id == 10.
Do you really sure that you have such a document in the orders collection?