Configure HikariCP + Hibernate + GuicePersist (JPA) at Runtime
I have a java8 desktop application using GuicePersist, Hibernate and HikariCP to communicate with Postgres DB. I managed to get my application to send / receive data to the DB using this META-INF / persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<!-- A JPA Persistence Unit -->
<persistence-unit name="myJPAunit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.123fakestreet.bogus.tomb.impl.postgres.model.movies</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<!-- SQL stuff -->
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQL9Dialect" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.hbm2ddl.auto" value="validate" />
<!-- hikari CP -->
<property name="hibernate.connection.provider_class" value="org.hibernate.hikaricp.internal.HikariCPConnectionProvider" />
<property name="hibernate.hikari.minimumIdle" value="20" />
<property name="hibernate.hikari.maximumPoolSize" value="100" />
<property name="hibernate.hikari.idleTimeout" value="30000" />
<property name="hibernate.hikari.dataSourceClassName" value="org.postgresql.ds.PGSimpleDataSource" />
<property name="hibernate.hikari.dataSource.url" value="jdbc:postgresql://192.168.100.75:5432/mpDb" />
<property name="hibernate.hikari.username" value="cowboy" />
<property name="hibernate.hikari.password" value="bebop" />
<!-- Disable the second-level cache -->
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
<!-- Default is false for backwards compatibility. Should be used on all new projects -->
<property name="hibernate.id.new_generator_mappings" value="true"/>
</properties>
</persistence-unit>
</persistence>
The tricky part is setting up my Guice JpaPersistModule at runtime. From what I can tell, I could override the properties in my META-INF / persistence.xml file by setting the properties on the Map object, like so:
Map<String, String> properties = new HashMap<>();
properties.put("myJPAunit.hibernate.hikari.dataSource.url", "jdbc:postgresql://192.168.100.75:5432/mpDb");
properties.put("myJPAunit.hibernate.hikari.dataSource.user", "cowboy");
properties.put("myJPAunit.hibernate.hikari.dataSource.password", "bebop");
then jpaModule.properties (properties) and then pass the whole thing to GuicePersist.
I have tried several different combinations of property names on Map, but so far I have no luck. I also looked at the pgsimpledatasource docs and hikariCP docs on the subject, but still my datasource properties are not getting set.
Can anyone help? Thanks a bunch.
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Try removing the save unit name from JPA properties, so instead of:
Map<String, String> properties = new HashMap<>();
properties.put("myJPAunit.hibernate.hikari.dataSource.url", "jdbc:postgresql://192.168.100.75:5432/mpDb");
properties.put( + "myJPAunit.hibernate.hikari.dataSource.user", "cowboy");
properties.put( + "myJPAunit.hibernate.hikari.dataSource.password", "bebop");
you should have something like this:
Map<String, String> properties = new HashMap<>();
properties.put("hibernate.hikari.dataSource.url", "jdbc:postgresql://192.168.100.75:5432/mpDb");
properties.put("hibernate.hikari.dataSource.user", "cowboy");
properties.put("hibernate.hikari.dataSource.password", "bebop");
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