It doesn't according to this : http://gis.stackexchange.com/questions/33951/does-geowebcache-uses-jai
Joe On Oct 14, 2012, at 9:18 AM, Adam Estrada <[email protected]> wrote: > Thanks Martin! Do you know off hand if geowebcache uses JAI TileCache? > > Adam > > Martin Desruisseaux <[email protected]> wrote: > >> Hello Adam >> >> Please feel free to ask as you want, no problem :) >> >> The Cache class is for any kind of object associated to an identifier. >> For example Coordinate Reference Systems (CRS) are often specified as >> the primary key value in the EPSG database. For example "EPSG:4326" >> stands for a geographic CRS using the WGS84 datum, and "EPSG:3395" >> stands for a Mercator projection using the WGS84 datum. SIS will provide >> a factory creating CRS objects from an EPSG code. But if the same EPSG >> code is specified many time, we want to return the existing instance. >> This will happen often since GIS applications typically contain >> thousands of geometries using the same CRS. >> >> This applies also to metadata, for example getting a CI_Citation object >> from an ISBN code. This could apply to images where the identifier could >> be the absolute path name, etc. In the later case, since images can be >> large, we need to measure the cost of keeping those objects in a cache. >> >> About caching of map tile, maybe the Cache class could be used for that, >> but we way also use something more specialized. We could take >> inspiration from the TileCache interface from Java Advanced Imaging [1] >> for instance. >> >> Martin >> >> [1] >> http://download.java.net/media/jai/javadoc/1.1.3/jai-apidocs/javax/media/jai/TileCache.html >> >> >> Le 14/10/12 09:35, Adam Estrada a écrit : >>> Martin, >>> >>> I am catching up on emails from a long week of conferences and a little >>> vacation time so please forgive me if this response sounds redundant or at >>> all dense. Is your cache class to be used as an actual map cache to store >>> and retrieve map tiles? It kind of sounds like that as we often test to see >>> if cached tiles have been changed by counting pixels and their values >>> before generating new ones. If nothing has changed, leave them alone, >>> right? Can this class be used like that or is that the intent? >>> >>> Adam >>
