How to set MongoDB ReadPreference in Spring MVC's contextConfigLocation

Declare the following bean

<bean id="readPreferenceSecondary" class="com.mongodb.TaggableReadPreference.SecondaryReadPreference"></bean>

and

you inject this in your mongotemplate

<bean id="mongoTemplateProdDb" class="org.springframework.data.mongodb.core.MongoTemplate" >        <property name="readPreference" ref="readPreferenceSecondary"></property></bean>

Expanding @Trisha's response in to an answer: "Do it in MongoTemplate programmatically" by setting the ReadPreference to SECONDARY.

MongoTemplate template = new MongoTemplate(...);template.setReadPreference(com.mongodb.ReadPreference.SECONDARY);

In case you are using spring-data-mongodb and have some requirement to use multiple Read Preferences based on find query, you can create multiple Mongo Templates and/or Repositories like

    @EnableMongoRepositories(basePackages = {            "com.you.repo.package" }, mongoTemplateRef = "mongoTemplateOne")        @Configuration    public class MongoConfig {    @Bean(name="mongoTemplateOne")    public MongoTemplate getMongoTemplateOne() throws UnknownHostException {        MongoTemplate templateOne = new MongoTemplate(new SimpleMongoDbFactory(new MongoClientURI("YOUR_MONGO_URL")));        templateOne.setReadPreference(ReadPreference.secondaryPreferred());        //setting WriteConcern but not relevant for this thread        templateOne.setWriteConcernResolver(yourWriteConcernResolver());        return templateOne;    }    @Bean(name = "mongoTemplateTwo")    public MongoTemplate getMongoTemplateTwo() throws UnknownHostException {        MongoTemplate templateTwo = new MongoTemplate(new SimpleMongoDbFactory(new MongoClientURI("YOUR_MONGO_URL")));        templateTwo.setReadPreference(ReadPreference.secondaryPreferred());        return templateTwo;    }    private WriteConcernResolver yourWriteConcernResolver() {        return action -> {            if (action.getCollectionName()                    .equals("your_collecton")                    && (action.getMongoActionOperation() == MongoActionOperation.SAVE                            || action.getMongoActionOperation() == MongoActionOperation.UPDATE)) {                return WriteConcern.MAJORITY;            }            return action.getDefaultWriteConcern();        };    }