bootique-cayenne-demo

A simple example that explains how to use Cayenne ORM integrated for Bootique.

For additional help/questions about this example send a message to Bootique forum.

You can find different versions of framework in use at

• 1.x
• 2.x

Prerequisites

* Java 1.8 or newer.
* Apache Maven.

Build the Demo

Here is how to build it:

$ git clone git@github.com:bootique-examples/bootique-cayenne-demo.git
$ cd bootique-cayenne-demo
$ mvn package

Run the Demo

Now you can check the options available in your app:

$ java -jar target/bootique-cayenne-demo-1.0-SNAPSHOT.jar

NAME
      bootique-cayenne-demo-1.0-SNAPSHOT.jar

OPTIONS
      -c yaml_location, --config=yaml_location
           Specifies YAML config location, which can be a file path or a URL.

      -r [true | false], --create-schema[=true | false]
           Create schema. False by default. Optional.

      -d [derby, mysql], --datasource[=derby, mysql]
           Select datasource to use. By default 'mysql' is used. Optional.

      -h, --help
           Prints this message.

      -H, --help-config
           Prints information about application modules and their configuration options.

      -i, --insert
           Insert initial data into db

      -s, --select
           Select data from db

To execute the example you should have a database to connect with. You can use Docker to start MySQL or use embedded Derby data source.

Here is docker command to start MySQL instance that can be used for this example:

$ docker run --name cayenne-mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=cayenne -e MYSQL_DATABASE=cayenne -d mysql:8.0

This example relies on Bootique to provide data source to Cayenne runtime. Mixing of declarations of data sources in Bootique and Cayenne is allowed but not recommended.

Note: be cautious with Cayenne project name since non-default Cayenne project name, e.g. 'cayenne-myproject.xml', requires an explicit declaration via CayenneModule.extend(..). The default one cayenne-project.xml works out of the box.

If you want to use Derby DB instead of MySQL just skip Docker step and add --datasource=derby option to the commands bellow.

Insert data into database via --insert command:

$ java  -jar target/bootique-cayenne-demo-1.0-SNAPSHOT.jar --insert --create-schema    

Simple selection via --select command:

$ java  -jar target/bootique-cayenne-demo-1.0-SNAPSHOT.jar --select

Output:

...
INFO  [2017-05-19 12:36:04,060] main i.b.c.d.SelectDataCommand: Articles count on domain mysite1.example.org: 2
...

The example provides post persist listener (see logs):

...
NEW ARTICLE {<ObjectId:Article, id=3>; committed; [domain=>{<ObjectId:Domain, id=2>}; publishedOn=>Fri May 19 15:33:34 MSK 2017; title=>LinkRest Presentation; body=>Here is how to use LinkRest; tags=>(..)]} 
...