Creating an EntityManager

The EntityManager is the corner stone of Active Objects.

The simplest way to create and configure an entity manager is by using the net.java.ao.builder.EntityManagerBuilder:

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EntityManager entityManager = EntityManagerBuilder
                .url(jdbcProperties.url) // the JDBC url for database connection
                .username(jdbcProperties.username) 
                .password(jdbcProperties.passord)
                .auto() // configuring the connection pool, auto detects connection pools on the classpath
                .useWeakCache() // an option to use weak caches
                .build(); // actually builds the entity manager

That's all there is to it.

This example is obviously extracted from the the dog food blog.