Package org.atmosphere.cpr

Class DefaultAsyncSupportResolver

java.lang.Object
org.atmosphere.cpr.DefaultAsyncSupportResolver
All Implemented Interfaces:
AsyncSupportResolver
public class DefaultAsyncSupportResolver extends Object implements AsyncSupportResolver
This is the default implementation of @link {AsyncSupportResolver}.
Author:
Viktor Klang

  • Field Details

  • Constructor Details

    • DefaultAsyncSupportResolver

      public DefaultAsyncSupportResolver(AtmosphereConfig config)

  • Method Details

    • testClassExists

      protected boolean testClassExists(String testClass)
      Convenience method that tests if a class with the given FQN is present on the classpath.
      Parameters:
      testClass -
      Returns:
      true if the class is present

    • detectContainersPresent

      public List<Class<? extends AsyncSupport>> detectContainersPresent()
      Returns a list of comet support by containers available on the classpath.
      Returns:

    • detectWebSocketPresent

      public List<Class<? extends AsyncSupport>> detectWebSocketPresent(boolean useNativeIfPossible, boolean useServlet30Async)

    • defaultCometSupport

      public AsyncSupport defaultCometSupport(boolean preferBlocking)
      This method is used to determine the default AsyncSupport if all else fails.
      Parameters:
      preferBlocking -
      Returns:

    • newCometSupport

      public AsyncSupport newCometSupport(Class<? extends AsyncSupport> targetClass)
      Given a Class of something that extends AsyncSupport, it tries to return an instance of that class.

      The class has to have a visible constructor with the signature (@link {AtmosphereConfig}).

      Parameters:
      targetClass -
      Returns:
      an instance of the specified class or null if the class cannot be instantiated

    • newCometSupport

      public AsyncSupport newCometSupport(String targetClassFQN)

    • resolve

      public AsyncSupport resolve(boolean useNativeIfPossible, boolean defaultToBlocking)
      This method is the general interface to the outside world.
      Parameters:
      useNativeIfPossible - - should the resolver try to use a native container comet support if present?
      defaultToBlocking - - should the resolver default to blocking IO comet support?
      Returns:
      an instance of AsyncSupport

    • resolve

      public AsyncSupport resolve(boolean useNativeIfPossible, boolean defaultToBlocking, boolean useServlet30Async)
      Specified by:
      resolve in interface AsyncSupportResolver

    • resolveWebSocket

      public AsyncSupport resolveWebSocket(List<Class<? extends AsyncSupport>> available)

    • resolveNativeCometSupport

      protected AsyncSupport resolveNativeCometSupport(List<Class<? extends AsyncSupport>> available)
      This method is called to determine which native comet support to the used.
      Parameters:
      available -
      Returns:
      the result of @link {resolveMultipleNativeSupportConflict} if there are more than 1 item in the list of available ontainers

    • resolveMultipleNativeSupportConflict

      protected AsyncSupport resolveMultipleNativeSupportConflict(List<Class<? extends AsyncSupport>> available)
      This method is called if there are more than one potential native container in scope.
      Returns:
      a AsyncSupport instance