So I used the Spring MongoDB application starter kit from Github. I tried running the application and it ran great. All the functionality work great. I am confused how the connection for this is being established. Where does one specify the db userid, password and the db name? Coming from a MySQL background, though MongoDB isnt a mountain there are some differences that dont set clearly in the mind of newbies.
I followed the official documentation from here : https://spring.io/guides/gs/accessing-mongodb-data-rest/. Maybe can the above info be added to the docs?
You should read some docs on Springboot. Springboot is opinionated. That means it assumes lot of stuff and sets-up lot of things for you. For example, in your case, As soon as it sees mongo dependency in your pom. It will create a connection to mongodb with default values which are as follows
host: localhost
port: 27017
username:
password:
database: test
That is how it is working. But if you want it to be customized, even that is made easy by specifying in configuration files (application.properties or yaml). See the list of configuration properties that you can set
https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html
Related
I've nearly got a SpringBoot app running on Google Cloud services that is connected to a Postgres instance.
I've ran through the steps on their guide, located here and have gotten to the point where I need to set my variables up for the app to find the database instance:
The problem encountered is two fold:
I don't know where and how to set these
My server logs report this error:
meaning that the Spring application is trying to find the database like it would on my local.
I set the following values in the app.yaml (assuming this is where they should be?)
runtime: java11
instance_class: F1
env_variables:
SQL_USER: quickstart-user
SQL_PASSWORD: <password>
SQL_DATABASE: quickstart_db
INSTANCE_CONNECTION_NAME: quickstart-instance
So, my question(s) are:
Is this the correct place to set them?
If not, do I need a appengine-web.xml file instead (And does anyone have an example of what this looks like, I can't find one)
How do I stop the app from looking for the local database?
Thanks
I'm making an api in which I separate my requests by responsibilities, services, repository and routes, I'm using typeorm to connect to the database, and I'm trying to implement unit tests to test my application so I have to unclip my code from the typeorm of so that my tests are not depending on it. However, at the time of decoupling, the typeorm is no longer able to connect with the bank, which is mongodb, returns the following error: ConnectionNotFoundError: Connection "mongo" was not found.
I've been reading about it and from what I understood the typeorm wouldn't give full support to the mongo, that's why it failed. I would like to confirm with you if that would be the case and what would be the best alternative to solve this.
MongoDB is supported by TypeORM (although I have not used it personally myself).
You can follow a short tutorial here.
What is not supported for Mongo is the typeorm "Migration" feature. For example see typeorm issue 6695. Migration is an advanced topic and you probably do not need it. But if you do, a workaround is on stackoverflow answer here.
But this Migration issue has nothing to do with your error. Almost certainly, your getConnection() call or ormconfig.json are incorrect. Start a with simple project based on the TypeORM Mongo tutorial, nothing else, verify you can connect to MongoDB, and work up from there.
I am triyng to connect pyeve with a MongoDB Atlas replica set (https://cloud.mongodb.com/). I've connected successfully DB management tools from the same host, to make sure the deployment is working OK.
One particularity is that using Atlas, all users must authenticate against auth database, I cannot put my users in the application database, so I need to set authSource in MONGO_URI.
Now, when defining the MONGO_URI for the replica set, in settings.py, like this:
MONGO_URI = mongodb://<USER>:<PASS>#my-shard-00-00-tlati.mongodb.net:27017,my-shard-00-01-tlati.mongodb.net:27017,my-shard-00-02-tlati.mongodb.net:27017/<MY_DB>?ssl=true&replicaSet=my-shard-0&authSource=admin
The authSource=admin parameter seems to be ignored, (I've checked debugging pymongo's auth and the authentication source used is None).
MONGO_AUTH_SOURCE could be used to set the authorization database, but it has no effect since MONGO_URI is used in preference of the other configuration variables, according to eve's documentation.
Is this an issue or am I doing it wrong?
Found out that the problem was that I was using version 0.4.1 for flask-pymongo. Updating it to version 0.5.1 fixed the problem.
I'm currently writing a Grails app using Grails 2.2.2 and MySQL, and have been deploying it to Cloudfoundry.
Until recently I've just used a single MySQL datasource for my domain, which Cloudfoundry detects and automagically creates and binds a MySQL service instance to.
I now have a requirement to store potentially large files somewhere, so I figured I'd take a look at MongoDB's GridFS. Cloudfoundry supports MongoDB, so I'd assumed Cloudfoundry would do some more magic when I deployed my app and would provide me with a MongoDB datasource as well.
Unfortunately I'm not prompted to create/bind a MongoDB service when I deploy my app, and I think this may be down to the way I'm connecting to Mongo.
I'm not using the MongoDB plugin, as this conflicts with another plugin I'm using, and in any case I don't need to persist any of my domain to Mongo - just some large files - so I'm using the Mongo java driver directly (similar to this - http://jameswilliams.be/blog/entry/171).
I'm unsure how Cloudfoundry detects that your application requires a particular datasource, but I'd assumed it would figure this out somehow from DataSource.groovy.
Mine looks like this...
environments {
development {
dataSource {
driverClassName = "com.mysql.jdbc.Driver"
dbCreate = "create-drop"
...
}
dataSourceMongo {
host = "localhost"
port = 27017
dbName = "my_mongo_database_name"
...
}
}
}
Is there something I'm missing? Or do I need to manually bind the MongoDB service somehow?
Using answer instead of comments for better formatting. :)
I guess you have already followed step to create the MongoDB service in Cloudfoundry as mentioned here otherwise this has to be done. Plus, it will be lot easier if you use the Groovy wrapper of the Java Driver of MongoDB called GMongo. Refer the GitHUb Source and this Mongo blog for more details.
I currently have my app running on my local machine, in Boot.scala I have:
MongoDB.defineDb(
DefaultMongoIdentifier,
MongoAddress(MongoHost("127.0.0.1", 27017), "platform")
)
I've successfully deployed the app to a cloud provider, and am in the process of setting up a database # mongohq.com
What would I need to change to enable the app to connect? I've taken a look here:
https://www.assembla.com/wiki/show/liftweb/Mongo_Configuration
But am a little confused by the connection details provided by mongohq, all they provide is:
Mongo URI
mongodb://<user>:<password>#<host>:<port>/<my_account_name>
Thanks in advance for any help, much appreciated :)
I am not familiar with MongoHQ in particular, but you should be able to put something in Boot like this:
MongoDB.defineDbAuth(
DefaultMongoIdentifier,
new Mongo(new ServerAddress("<host>", <port>)),
<my_account_name>,
<user>,
<pass>
)
Where the <*> variables are the particular part of the connection URI that were provided to you when you signed up for MongoHQ.