Connecting to MongoDB 3.0 with Java Spring

Question

I am having problems in using Spring to access MongoDB with credentials. While without credentials it works like a charme, using them just fails saying

    F         


        

Answer 1

Here is xml version to connect MongoDB 3.0.7 with Spring (parameters are passed from a property file):

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/data/mongo
      http://www.springframework.org/schema/data/mongo/spring-mongo.xsd
      http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd">

<mongo:mongo-client host="${mongo.url}" port="${mongo.port}" credentials="${mongo.user}:${mongo.pass}@${mongo.dbname}">
    <mongo:client-options write-concern="NORMAL" />
</mongo:mongo-client>

<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongo" ref="mongo"/>
    <constructor-arg name="databaseName" value="${mongo.dbname}"/>
</bean>

Then in Java, you get mongoTemplate like this:

    @Autowired
MongoTemplate mongoTemplate;

public String mongoTest() {

    DBCollection dc = mongoTemplate.getCollection("yourCollection");

    logger.debug("--get collection name=" + dc.getFullName());

}

Answer 2

There are two of possibilities how to make Mongodb 3 work with Spring data. Both involve downgrading of authentication schema:

1. start with mongodb 2.x and upgrade to 3.0; works as authentication system stays the same

2. if you have a new installation of mongo 3.0, you can downgrade the authentication schema before creating the users.

To downgrade the authentication mechanism:

var schema = db.system.version.findOne({"_id" : "authSchema"})
schema.currentVersion = 3
db.system.version.save(schema)

Or you can even have mixed users, some created with version 5 (that of mongo 3) and some with version 3. Except you will be able to connect (from Spring data) only with users created using version 3.

You could try 3.0 + mongo 3 beta drivers: in general this combination works with "legacy code", but I did not manage to make it work with Spring Data.

Answer 3

spring.data.mongodb.host and spring.data.mongodb.port are not supported if you’re using the Mongo 3.0 Java driver. In such cases, spring.data.mongodb.uri should be used to provide all of the configuration, like this:

spring.data.mongodb.uri=mongodb://user:secret@mongo1.example.com:12345

Just add the spring.data.mongodb.uri to your application.yml and you'll get the auto configured MongoDbFactory and MongoTemplate.

Answer 4

using this versions in your pom:

<!-- mongodb java driver -->
<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>3.2.1</version>
</dependency>

<!-- Spring data mongodb -->
<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>1.8.2.RELEASE</version>
</dependency>

And this configuration in spring:

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

    <!-- Seeds -->
    <bean id="mongoSeedListID" class="java.util.ArrayList">
    <constructor-arg>
        <list>
            <ref bean="mongoSeedlID" />
        </list>
    </constructor-arg>
    </bean>

    <bean id="mongoSeedlID" class="com.mongodb.ServerAddress">
            <constructor-arg type="java.lang.String" name="host" value="DATABASE_HOST" />
            <constructor-arg type="int" name="port" value="DATABASE_PORT" />
    </bean>

    <!-- Credentials -->
    <bean id="mongoCredentialListID" class="java.util.ArrayList">
    <constructor-arg>
        <list>
            <ref bean="mongoCredentialID" />
        </list>
    </constructor-arg>
    </bean>

    <bean id="mongoCredentialID" class="com.mongodb.MongoCredential">
            <constructor-arg name="mechanism" value = "#{T(com.mongodb.AuthenticationMechanism).SCRAM_SHA_1}" />
            <constructor-arg type="java.lang.String" name="userName" value="DATABASE_USERNAME" />
            <constructor-arg type="java.lang.String" name="source" value="DATABASE_SOURCE" />
            <constructor-arg type="char[]" name="password" value="DB_USER_PASS" />
    </bean>

    <!-- MongoClient -->
    <bean id="mongoClientID" class="com.mongodb.MongoClient">
            <constructor-arg ref="mongoSeedListID" />
            <constructor-arg ref="mongoCredentialID"  />
    </bean>

    <!-- MongoDbFactory -->
    <bean id="simpleMongoDbFactoryID" class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
        <constructor-arg ref="mongoClientID" />
        <constructor-arg name="databaseName" value="APP_DATABASENAME" />
    </bean>

    <!-- MongoTemplate -->
    <bean id="mongoTemplateID" class="org.springframework.data.mongodb.core.MongoTemplate">
        <constructor-arg ref="simpleMongoDbFactoryID" />
    </bean>

    <bean id="log4jInitializationID" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
        <property name="targetClass" value="org.springframework.util.Log4jConfigurer" />
        <property name="targetMethod" value="initLogging" />
        <property name="arguments">
            <list>
                <value>classpath:log4j/log4j_test.properties</value>
            </list>
        </property>
    </bean>

 </beans>

With this configuration you only have to inject the MongoTemplate:

   @Autowired
   @Qualifier("mongoTemplateID")
   private MongoTemplate mongoTemplate;

This should work fine =)

Answer 5

After a lot of attempts and reading, I found a way to make MongoDB 3.0 work with authentication.

This was a new installation of MongoDB 3.0, no upgrade involved.

I used these maven dependencies:

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>1.6.2.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>3.0.0</version>
</dependency>

having as parent

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.2.2.RELEASE</version>
</parent>

Then in my Configuration file I had

/**
 * DB connection Factory
 * 
 * @return a ready to use MongoDbFactory
 */
@Bean
public MongoDbFactory mongoDbFactory() throws Exception {

    // Set credentials      
    MongoCredential credential = MongoCredential.createCredential(mongoUser, databaseName, mongoPass.toCharArray());
    ServerAddress serverAddress = new ServerAddress(mongoHost, mongoPort);

    // Mongo Client
    MongoClient mongoClient = new MongoClient(serverAddress,Arrays.asList(credential)); 

    // Mongo DB Factory
    SimpleMongoDbFactory simpleMongoDbFactory = new SimpleMongoDbFactory(
            mongoClient, databaseName);

    return simpleMongoDbFactory;
}

/**
 * Template ready to use to operate on the database
 * 
 * @return Mongo Template ready to use
 */
@Bean
public MongoTemplate mongoTemplate() throws Exception {
    return new MongoTemplate(mongoDbFactory());
}

And finally wherever you have access to the MongoTemplate bean you'll be able to do

mongoTemplate.insert(objectToStore, collectionName);