Examples of org.geoserver.gwc.layer.CatalogLayerEventListener

• org.geoserver.gwc.layer.CatalogLayerEventListener
  Listens to {@link Catalog} layers added/removed events and adds/removes{@link GeoServerTileLayer}s to/from the {@link CatalogConfiguration}

  Handles the following cases:

  • Layer added: a {@link LayerInfo} or {@link LayerGroupInfo} has been added. A{@link GeoServerTileLayer} is {@link CatalogConfiguration#createLayer is created} with the{@link GWCConfig default settings} only if the integrated GWC configuration is set to{@link GWCConfig#isCacheLayersByDefault() cache layers by default}.
  • Layer removed: a {@code LayerInfo} or {@code LayerGroupInfo} has been removed. GWC isinstructed to remove the layer, deleting it's cache and any other associated information completely (for example, the disk quota information for the layer is also deleted and the global usage updated accordingly).
  • Layer renamed: a {@link LayerInfo} or {@link LayerGroupInfo} has been renamed. GWC is{@link StorageBroker#rename instructed to rename} the corresponding tile layer preserving thecache and any other information (usage statistics, disk quota usage, etc).
  • Workspace renamed: a {@link WorkspaceInfo} as been renamed. GWC is{@link StorageBroker#rename instructed to rename} all the corresponding tile layer associated to the workspace, preserving the cache and any other information (usage statistics, disk quota usage, etc).
  • Namespace changed: a {@link ResourceInfo} has been assigned to a different{@link NamespaceInfo namespace}. As the GWC tile layers are named after the resource's {@link ResourceInfo#prefixedName() prefixed name} and not only after the{@link LayerInfo#getName()} (at least until GeoServer separates out data from publication - thefamous data/publish split), GWC is instructed to rename the layer preserving the cache and any other information for the layer.
  • LayerGroupInfo modified: either the {@link LayerGroupInfo#layers() layers} or{@link LayerGroupInfo#styles() styles} changed for a {@code LayerGroupInfo}. It's cache is truncated.
  • LayerInfo default style replaced: a {@code LayerInfo} has been assigned a different{@link LayerInfo#getDefaultStyle() default style}. The corresponding tile layer's cache is truncated for the default style.
  • LayerInfo alternate styles changed the set of a {@code LayerInfo}'s {@link LayerInfo#getStyles() alternate styles} has been modified. For any added style, if the{@link GeoServerTileLayer} is configured to {@link GeoServerTileLayerInfo#isAutoCacheStyles() automatically cache all styles}, the style name is added to the set of {@link GeoServerTileLayerInfo#cachedStyles() cached styles}. For any removed style, if it was one of the {@link GeoServerTileLayerInfo#cachedStyles() cached styles}, the layer's cache for that style is truncated, and it's removed from the tile layer's set of cached styles. Subsequently, the {@link GeoServerTileLayer} will create a {@link StringParameterFilter "STYLES"parameter filter} for all the cached styles on demand

  @author Arne Kepp @author Gabriel Roldan

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