CODEWITHSUNDEEP
javaspringmongodbspring-mvcdatabase-replication
Ayelet
Ayelet

Reputation: 1743

MongoDB replication with Spring

I configured Spring with MongoDB on my local machine, without replication, and everything works fine. I also have a replica set that works fine.

Now I tried to add the replica set, but the reads/writes still go to my local machine!

This is my configuration, host1-3 are virtual machines:

<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
                    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                    http://www.springframework.org/schema/tx
                    http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
                    http://www.springframework.org/schema/aop
                    http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
                    http://www.springframework.org/schema/data/mongo
                    http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">

<mongo:repositories base-package="my.repositories" />

<mongo:mongo replica-set="host1:27017,host2:27017,host3:27017" />

<mongo:db-factory dbname="my_db" />

<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
</bean>

Anyone has ideas/suggestions? Thanks!

Edit: Ok so I found the problem, just needed to add mongo-ref to the factory. So the correct configuration is:

<mongo:mongo id="mongo" replica-set="host1:27017,host2:27017,host3:27017" />

<mongo:db-factory dbname="my_db" mongo-ref="mongo" />

Upvotes: 2

Views: 3495

Answers (2)

Ayelet
Ayelet

Reputation: 1743

Ok so I found the problem, just needed to add mongo-ref to the factory. So the correct configuration is:

<mongo:mongo id="mongo" replica-set="host1:27017,host2:27017,host3:27017">
<mongo:db-factory dbname="my_db" mongo-ref="mongo" />

Upvotes: 4

PKD
PKD

Reputation: 160

Writes will always go to the primary. Reads go to the primary by default unless you change the Read Preference in your use of the Java driver.

Upvotes: 0

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