org.apache.tapestry5.internal.services.assets

## Class ResourceChangeTrackerImpl

- java.lang.Object
- - org.apache.tapestry5.internal.event.InvalidationEventHubImpl
  - - org.apache.tapestry5.internal.services.assets.ResourceChangeTrackerImpl

- All Implemented Interfaces:
    ResourceChangeTracker, ResourceDependencies, InvalidationEventHub, UpdateListener

      public class ResourceChangeTrackerImpl
      extends InvalidationEventHubImpl
      implements ResourceChangeTracker, UpdateListener

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ResourceChangeTrackerImpl(ClasspathURLConverter classpathURLConverter, boolean productionMode)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addDependency(Resource dependency)` Marks the dependency as an additional resource.
    `void` | `checkForUpdates()` Invoked to force the receiver to check for updates to whatever underlying resources it makes use of.
    `void` | `forceInvalidationEvent()` Forces an invalidation event.
    `void` | `registerWithUpdateListenerHub(UpdateListenerHub hub)`
    `long` | `trackResource(Resource resource)` Start tracking the resource (or return the last modified time of an already tracked resource).

    - ### Methods inherited from class org.apache.tapestry5.internal.event.InvalidationEventHubImpl

      `addInvalidationCallback, addInvalidationListener, clearOnInvalidation, fireInvalidationEvent`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.apache.tapestry5.services.InvalidationEventHub

      `addInvalidationCallback, addInvalidationListener, clearOnInvalidation`

- - ### Constructor Detail

    - #### ResourceChangeTrackerImpl

          public ResourceChangeTrackerImpl(ClasspathURLConverter classpathURLConverter,
                                           @Symbol(value="tapestry.production-mode")
                                           boolean productionMode)

  - ### Method Detail

    - #### registerWithUpdateListenerHub

          @PostInjection
          public void registerWithUpdateListenerHub(UpdateListenerHub hub)

    - #### trackResource

          public long trackResource(Resource resource)

      Description copied from interface: `ResourceChangeTracker`
      Start tracking the resource (or return the last modified time of an already tracked resource). Only file system resources are tracked. Resources are tracked until any resource changes, at which points listeners are notified and the internal state is cleared.
      Specified by:
        `trackResource` in interface `ResourceChangeTracker`
      Parameters:
        `resource` - to track
      Returns:
        last modified time, to nearest second
      See Also:
        `URLChangeTracker`

    - #### addDependency

          public void addDependency(Resource dependency)

      Description copied from interface: `ResourceDependencies`
      Marks the dependency as an additional resource. A change to the dependency is considered the same as a change to the resource being transformed.
      Specified by:
        `addDependency` in interface `ResourceDependencies`

    - #### forceInvalidationEvent

          public void forceInvalidationEvent()

      Description copied from interface: `ResourceChangeTracker`
      Forces an invalidation event. This is required in a rare case, to clear out a `StreamableResource` generated from the component message catalog; there are some walls in place that prevent the message catalog's underlying `Resource`s from being exposed.
      Specified by:
        `forceInvalidationEvent` in interface `ResourceChangeTracker`
      See Also:
        `MessageCatalogResource`

    - #### checkForUpdates

          public void checkForUpdates()

      Description copied from interface: `UpdateListener`
      Invoked to force the receiver to check for updates to whatever underlying resources it makes use of.
      Specified by:
        `checkForUpdates` in interface `UpdateListener`

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