com.google.inject.persist
Class PersistFilter
java.lang.Object
com.google.inject.persist.PersistFilter
- All Implemented Interfaces:
- javax.servlet.Filter
public final class PersistFilter
- extends Object
- implements javax.servlet.Filter
Apply this filter to enable the HTTP Request unit of work and to have
guice-persist manage the lifecycle of active units of work.
The filter automatically starts and stops the relevant PersistService
upon Filter.init(javax.servlet.FilterConfig)
and
Filter.destroy()
respectively.
To be able to use the open session-in-view pattern (i.e. work per request),
register this filter once in your Guice ServletModule
. It is
important that you register this filter before any other filter.
For multiple providers, you should register this filter once per provider, inside
a private module for each persist module installed (this must be the same private
module where the specific persist module is itself installed).
Example configuration:
public class MyModule extends ServletModule {
public void configureServlets() {
filter("/*").through(PersistFilter.class);
serve("/index.html").with(MyHtmlServlet.class);
// Etc.
}
}
This filter is thread safe and allows you to create injectors concurrently
and deploy multiple guice-persist modules within the same injector, or even
multiple injectors with persist modules withing the same JVM or web app.
This filter requires the Guice Servlet extension.
- Author:
- Dhanji R. Prasanna (dhanji@gmail.com)
Method Summary |
void |
destroy()
|
void |
doFilter(javax.servlet.ServletRequest servletRequest,
javax.servlet.ServletResponse servletResponse,
javax.servlet.FilterChain filterChain)
|
void |
init(javax.servlet.FilterConfig filterConfig)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
PersistFilter
@Inject
public PersistFilter(UnitOfWork unitOfWork,
PersistService persistService)
init
public void init(javax.servlet.FilterConfig filterConfig)
throws javax.servlet.ServletException
- Specified by:
init
in interface javax.servlet.Filter
- Throws:
javax.servlet.ServletException
destroy
public void destroy()
- Specified by:
destroy
in interface javax.servlet.Filter
doFilter
public void doFilter(javax.servlet.ServletRequest servletRequest,
javax.servlet.ServletResponse servletResponse,
javax.servlet.FilterChain filterChain)
throws IOException,
javax.servlet.ServletException
- Specified by:
doFilter
in interface javax.servlet.Filter
- Throws:
IOException
javax.servlet.ServletException
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