How to configure two instance mongodb use spring boot and spring data

Question

The First instance is the embedded MongoDb, the second instance is the live MongoDb. How do it configure use spring data and spring boot. How to switch easily these instances by properties file??

UPDATE

• By default application should start build-in database and store data into APPDIR/db directory

• It should be possible to let application know that external database will be used by configuring mongo.url property. In this case no need to start internal database. Instead of that external connection should be used

Paste some configuration, please.

UPDATE I have:

<!--Embedded MongoDB-->
<dependency>
    <groupId>de.flapdoodle.embed</groupId>
    <artifactId>de.flapdoodle.embed.mongo</artifactId>
    <version>1.50.5</version>
</dependency>

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.uri=mongodb://localhost/test
spring.data.mongodb.database=test

# EMBEDDED MONGODB (EmbeddedMongoProperties)
#spring.mongodb.embedded.storage.databaseDir=c:/db
#spring.mongodb.embedded.version=3.2.2

if I'll specify external mongodb, then i want embedded mongodb shouldn't to startup.

java.io.IOException: Could not start process: <EOF>
    at de.flapdoodle.embed.mongo.AbstractMongoProcess.onAfterProcessStart(AbstractMongoProcess.java:79) ~[de.flapdoodle.embed.mongo-1.50.5.jar!/:?]
    at de.flapdoodle.embed.process.runtime.AbstractProcess.<init>(AbstractProcess.java:114) [de.flapdoodle.embed.process-1.50.2.jar!/:?]
    at de.flapdoodle.embed.mongo.AbstractMongoProcess.<init>(AbstractMongoProcess.java:53) [de.flapdoodle.embed.mongo-1.50.5.jar!/:?]
    at de.flapdoodle.embed.mongo.MongodProcess.<init>(MongodProcess.java:50) [de.flapdoodle.embed.mongo-1.50.5.jar!/:?]
    at de.flapdoodle.embed.mongo.MongodExecutable.start(MongodExecutable.java:44) [de.flapdoodle.embed.mongo-1.50.5.jar!/:?]
    at de.flapdoodle.embed.mongo.MongodExecutable.start(MongodExecutable.java:34) [de.flapdoodle.embed.mongo-1.50.5.jar!/:?]
    at de.flapdoodle.embed.process.runtime.Executable.start(Executable.java:101) [de.flapdoodle.embed.process-1.50.2.jar!/:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_05]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_05]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_05]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_05]

Answer 1

I think you can use Spring profiles.

Here's the documentation .

Spring Profiles provide a way to segregate parts of your application configuration and make it only available in certain environments.

UPDATE

Note : Everything that I will talk about below is indicated in the documentation I mentioned above... You should really take a look to this documentation. This documentation is great (no joke).

From Appendix A. Common application properties (Spring boot documentation)

Here's how to configuration remote MongoDB instance in application.properties :

# MONGODB (MongoProperties)
spring.data.mongodb.authentication-database= # Authentication database name.
spring.data.mongodb.database=test # Database name.
spring.data.mongodb.field-naming-strategy= # Fully qualified name of the FieldNamingStrategy to use.
spring.data.mongodb.grid-fs-database= # GridFS database name.
spring.data.mongodb.host=localhost # Mongo server host.
spring.data.mongodb.password= # Login password of the mongo server.
spring.data.mongodb.port=27017 # Mongo server port.
spring.data.mongodb.repositories.enabled=true # Enable Mongo repositories.
spring.data.mongodb.uri=mongodb://localhost/test # Mongo database URI. When set, host and port are ignored.
spring.data.mongodb.username= # Login user of the mongo server.

And here's how to configure embedded MongoDB instance in application.properties :

# EMBEDDED MONGODB (EmbeddedMongoProperties)
spring.mongodb.embedded.features=SYNC_DELAY # Comma-separated list of features to enable.
spring.mongodb.embedded.storage.databaseDir= # Directory used for data storage.
spring.mongodb.embedded.storage.oplogSize= # Maximum size of the oplog in megabytes.
spring.mongodb.embedded.storage.replSetName= # Name of the replica set.
spring.mongodb.embedded.version=2.6.10 # Version of Mongo to use.

From Change configuration depending on the environment (Spring boot documentation)

To do the same thing with properties files you can use application-${profile}.properties to specify profile-specific values.

You can define the MongoDB embedded configuration into application-dev.properties and the MongoDB remote configuration into application-prod.properties

UPDATE II : The return

I'm assuming that you start your embedded MongoDB instance in a class like (from documentation ) :

import de.flapdoodle.embed.mongo.config.ArtifactStoreBuilder;

    ...
    MongodStarter starter = MongodStarter.getDefaultInstance();

    String bindIp = "localhost";
    int port = 12345;
    IMongodConfig mongodConfig = new MongodConfigBuilder()
        .version(Version.Main.PRODUCTION)
        .net(new Net(bindIp, port, Network.localhostIsIPv6()))
        .build();

    MongodExecutable mongodExecutable = null;

You can assign a spring profile to this class like (from documentation ) :

@Configuration
@Profile("dev")
public class ProductionConfiguration {

    // ...

}

This way, your embedded MongoDB is started only when you choose dev profile.