I want to create a simple lift web application which read input throug form and insert it into database.
You need to add mysql jdbc driver to your project (as a maven artifact, or via sbt, or just put jar in CLASSPATH) and edit properties file (props/default.props):
db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost/your_db_name
db.user=user
db.password=password
Also, you can setup db context in app container (Tomcat, etc.) instead. After that you can use Lift's ORM (Mapper).
Related
I am trying to load json messages into a Postgres database, using the Postgres sink connector. I have been reading online and have only found the option to have the schema in the JSON message, however, ideally, i would like not to include the schema in the message. Is there a way to register the JSON schema in the schema registry and use that like it's done with Avro?
Also, i'm currently running kafka by downloading the bin, as I had several problems with running kafka connect with docker due to ARM compatibility issues. Is there a similar install for schema registry? Because i'm only finding the option of downloading it through confluent and running it on docker. Is it possible to only run schema registry with docker, keeping my current set up?
Thanks
JSON without schema
The JDBC sink requires a schema
Is there a way to register the JSON schema in the schema registry and use that like it's done with Avro?
Yes, the Registry supports JSONSchema (as well as Protobuf), in addition to Avro. This requires you to use a specific serializer; you cannot just send plain JSON to the topic.
currently running kafka by downloading the bin... Is there a similar install for schema registry?
The Confluent Schema Registry is not a standalone package outside of Docker. You'd have to download Confluent Platform in place of Kafka and then copy over your existing zookeeper.properties and server.properties into that. Then run Schema Registry. Otherwise, compile it from source and build a standalone distribution of it with mvn -Pstandalone package
There are other registries that exist, such as Apicurio
I have a Spring Boot project that currently consists of three microservices (all of them are maven children of the mentioned project), namely:
eureka-server : as the name says, it's simply a Eureka project that works as a server for registering other microservices
user-server : a project that holds a 'monolithic stack' (model, DAO, service and controller). Here is where the problem is. More on this later.
web-server : a project that contains the AngularJS application and a controller that is accessible from AngularJS and that communicates with the user-server module.
Eureka forces me to include a hsqldb dependency in the parent pom in order to launch the three mentioned applications.
The problem is that I was using MySQL in user-server and hsqldb has somehow overriden the MySQL data source.
In other words, the database engine of user-server is now hsqldb and I want to keep working with MySQL, and if I remove the dependency, the application will obviously not launch.
Is there any way to solve this and work with, maybe, two databases in user-server?
Thank you everyone!
I finally figured out how to get it working. I'll just post it here in case someone faces a similar problem.
It seems that application.properties wasn't being read when launching the application because telling Spring Boot which .yml configuration file for Eureka should be read, it was overriden.
In the .yml file of the microservice I wasn't able either to set the datasource to MySQL, so the solution was to hardcode the datasource properties when launching the microservice, as follows:
System.setProperty("spring.datasource.platform","mysql");
System.setProperty("spring.datasource.url","jdbc:mysql...");
Now i want to setup an application yii2 to test link redirect and get response result. So i dont need a database connect to it. How to setup app run without connect to a database. Thanks.
Yii modules and components are loaded only when needed. You can simple write your own controller and model, which are not using database. Just don't inherit your model from ActiveRecord, use yii\base\Model. And Yii will not instantiate unnecessary database connection when handling your route, even if database section is presented in config.
Currently we are maintaining all our properties in the database and applications are referenced through their Spring Profile Name , now we are transitioning into Cloud Foundry, keeping this in focus how can we build Spring Cloud Config Server using existing database to read application properties, so far in the documentation i see reference to Git Repository
http://cloud.spring.io/spring-cloud-config/spring-cloud-config.html#_spring_cloud_config_server
Not currently, we are limited to git and svn. There is a pull request for mongodb for an example though.
No longer true, now support is available for jdbc http://cloud.spring.io/spring-cloud-config/single/spring-cloud-config.html#_jdbc_backend
I would like to override the portion of JBoss that loads JDBC connection information from the XML config file. I would like to continue using the rest of JBoss's connection pooling/caching features. I just want to load the connection data from another source.
Which MBean should I be implementing and how do I configure the override in JBoss?
The JBoss -ds.xml descriptors actually cover a multitude of sins. If you look on the JBoss JVM console, you'll find 4 or 5 MBeans there for each data source. You could potentially do this programmatically, but I wouldn't give good odds on your chances.
My suggestion would be to use a 3rd-party connection pooling library (e.g. Commons DBCP). Define the pool using that, and then bind the resulting DataSource to JNDI. CLient application using the pool shouldn't know any difference.