...

For a number of DBMS the JDBC Drivers are included with JS7. However, due to restrictions for bundling of JDBC Drivers with Open Source software for some DBMS users have to individually download the JDBC Driver from the vendor's web site:

Hibernate Configuration Files

...

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<hibernate-configuration>
 <session-factory>
  <property name="hibernate.connection.driver_class">org.mariadb.jdbc.Driver</property>
  <property name="hibernate.connection.password">jobscheduler</property>
  <property name="hibernate.connection.url">jdbc:mysqlmariadb://mariadbsrv:3306/jobscheduler</property>
  <property name="hibernate.connection.username">jobscheduler</property>
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect<MariaDBDialect</property>
  <property name="hibernate.show_sql">false</property>
  <property name="hibernate.connection.autocommit">false</property>
  <property name="hibernate.format_sql">true</property>
  <property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>
  <property name="hibernate.hikari.maximumPoolSize">10</property>
 </session-factory>
</hibernate-configuration>

...

• The example makes use of the SQL Server® database server running for hostname sqlserversrv and port 1433.
• Consider that use of the above parameters with the JDBC URL is required: sendStringParametersAsUnicode=false;selectMethod=cursor

Connection Pool

JS7 makes use of a connection pool to allow a larger number of JOC Cockpit user sessions to share database connections form the pool.

• By default JOC Cockpit is configured to use up to 10  connections from the pool. As a rule of thumb 1 connection can be shared by approx. 3 parallel users.
• Adjust this setting to the max. number of connections required for sharing between parallel users of JOC Cockpit. 

Hibernate offers to choose one out of a number of Connection Pool implementations.

• By default the Hikari Connection Pool is used with JS7.

  • The Hikari setting for the maximumPoolSize

    should be

    is included with

    a

    the Hibernate configuration file as this determines the max. number of open database connections

    . Adjust this setting to the number of connections required for sharing between parallel users of JOC Cockpit. As a rule of thumb 10 connections should work for approx .30 parallel users.

    :

    Code Block
    language xml title Hikari Connection Pool recommended settings collapse true
    <property name="hibernate.hikari.maximumPoolSize">10</property>

    
    
    

  • Additional Any additional settings for Hikari can be added by property elements to a Hibernate configuration file.
• Alternatively e.g. the C3P0 Connection Pool can be used.

  • Use of C3P0 suggests a number of additional settings that better match use with JS7 than the default values

    Code Block
    language xml title C3P0 Connection Pool recommended settings collapse true
    <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property> <property name="hibernate.c3p0.maxConnectionAge">14400</property> <property name="hibernate.c3p0.maxStatementsPerConnection">0</property> <property name="hibernate.c3p0.maxStatements">0</property> <property name="hibernate.c3p0.checkoutTimeout">0</property> <property name="hibernate.c3p0.maxIdleTime">14400</property> <property name="hibernate.c3p0.acquireRetryAttempts">1</property> <property name="hibernate.c3p0.minPoolSize">5</property> <property name="hibernate.c3p0.acquireIncrement">1</property> <property name="hibernate.c3p0.statementCacheNumDeferredCloseThreads">1</property> <property name="hibernate.c3p0.numHelperThreads">3</property> <property name="hibernate.c3p0.idleConnectionTestPeriod">1800</property> <property name="hibernate.c3p0.maxPoolSize">10</property> <property name="hibernate.c3p0.initialPoolSize">5</property>

  • Additional settings can be added by corresponding property elements, however, close reading of the C3P0 docs is recommended before applying changes.