Fast ORM for agile development
Follow to: ActiveJDBC documentation
5 minute introduction
For a simple example we will use a table called PEOPLE created with this MySQL DDL:
CREATE TABLE people ( id int(11) NOT NULL auto_increment PRIMARY KEY, first_name VARCHAR(56) NOT NULL, last_name VARCHAR(56), created_at DATETIME, updated_at DATETIME );
ActiveJDBC infers DB schema parameters from a database. This means you do not have to provide it in code.
The corresponding model looks like this:
There is no code in the body of the class, and yet it is fully functional and will map to a table called
PEOPLE automatically. Read more on English Inflections.
How to query
Simplest query example:
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where() method takes a snippet of real SQL. The first line above will generate this statement:
SELECT * FROM people WHERE first_name = 'John'.
Finder methods can also be parametrized:
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where() method takes a vararg, allowing unlimited any number of parameters to be passed into a statement.
Paging through data
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This query will ensure that the returned result set will start at the 21st record and will return only 10 records, according to the
orderBy. The ActiveJDBC has a built in facility for various database flavors and it will generate appropriate SQL statement that is specific for a DB (Oracle, MySQL, etc) and is efficient. It will not fetch all records, starting with 1.
Creating new records
There are several ways to do this, and the simplest is:
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There is also a shorthand version of doing the same:
and yet shorter one :
Updating a record
Deleting a record
There are more ways to delete, follow Delete cascade to learn more.
If you want to get started, follow these links:
Please, see Getting Started for a working example.
Look through these:
Other working examples:
Here is the JavaDoc for ActiveJDBC
- Infers metadata from DB
- Convention-based configuration.
- No need to learn another QL. SQL is sufficient
- Code often reads like English
- No sessions, no "attaching, re-attaching"
- No persistence managers.
- Models are lightweight, simple POJOs
- No proxy-ing. What you write is what you get (WYWIWYG :))
- No getters and setters. You can still write them if you like.
- No DAOs and DTOs
- No Anemic Domain Model
Currently the following databases are supported:
Adding a new dialect is relatively easy. Just look at commits on this branch: h2integration
Please, refer to ActiveJDBC Releases.
Getting the latest version
For the latest version refer to ActiveJDBC on Maven Central. If you use Maven add this to your pom:
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Do not forget to replace LATEST_VERSION with the latest version deployed to Maven Central (see above)
Current latest version: 1.4.13.
Additionally, configure Instrumentation plugin:
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Or download from: ActiveJDBC Instrumentation plugin on Maven Central
Getting latest snapshot versions
If you are using Maven, add these repositories to your pom:
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If you are not using Maven, you can pull down the latest snapshots from here: JavaLite Repo
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