Vaadin 8 on Grails 3
  • Introduction
  • Project setup
    • Environment setup
      • Unix based systems
      • Windows
    • Creating Project
      • Command line
      • IntelliJ IDEA
    • Plugin Configuration
      • UI class
      • URL mapping
      • Production mode
      • Async support
      • Themes
      • SASS compilation
      • Widgetset compilation
      • Servlet class
      • Spring component scan
      • UI provider
      • Open session in view
    • Clean up
    • Best Practices
  • Database
    • GORM
      • Create Domain Model
      • Transactions
      • LazyInitializationException
      • Open Session In View I.
      • Open Session In View II.
      • Table Container
    • Groovy SQL
      • Create Sql Bean
      • Execute SQLs
    • MyBatis
      • MyBatis Configuration
      • Reading Data with MyBatis
    • JdbcTemplate
      • Create JdbcTemplate Beans
      • Using JdbcTemplate
    • Clean Up When Using Alternatives
  • UI
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  1. Database
  2. GORM

Open Session In View I.

Example code is available on github.com/vaadin-on-grails/gorm-open-session-in-view-i.

As described in LazyInitializationException article, we will run into troubles with LazyInitializationException when domain object tries to load other object lazily. If the disabling of lazy loading is not what we are looking for and we still want to do lazy fetching, we have to use OSIV (Open Session In View).

Stephan Grundner has implemented adding OSIV filter into the plugin. Thanks to that we can configure openSessionInViewFilter property in VaadinConfig.grovy.

openSessionInViewFilter = 'org.springframework.orm.hibernate4.support.OpenSessionInViewFilter'

Or add older Hibernate filter in case you are using Hibernate 3.

openSessionInViewFilter = 'org.springframework.orm.hibernate3.support.OpenSessionInViewFilter'
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Last updated 4 years ago

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