@Test
public void testGC() throws Exception {
int gcRuns = PictureTilingCacheGCManager.getGCRuns();
PictureTilingService pts = Framework.getLocalService(PictureTilingService.class);
assertNotNull(pts);
benchTiler(pts, new MagickTiler());
testMagick2();
testMagick2();
long cacheSize = PictureTilingCacheGCManager.getCacheSizeInKBs();
// System.out.println("CacheSize = " + cacheSize + "KB");
assertTrue(cacheSize > 0);
int reduceSize = 500;
// System.out.println("performing GC with " + reduceSize
// + " KB target reduction");
PictureTilingCacheGCManager.doGC(reduceSize);
int gcRuns2 = PictureTilingCacheGCManager.getGCRuns();
assertEquals(1, gcRuns2 - gcRuns);
long newCacheSize = PictureTilingCacheGCManager.getCacheSizeInKBs();
// System.out.println("new cacheSize = " + newCacheSize + "KB");
// System.out.println("effective delta = " + (cacheSize - newCacheSize)
// + "KB");
assertTrue(cacheSize - newCacheSize > reduceSize);
}
public static boolean gcIfNeeded() {
gcCalls += 1;
log.debug("GC Thread awake, see if there is some work to be done");
long totalSize = getCacheSizeInKBs();
long limit = getMaxDiskSpaceUsageKB();
if (totalSize < limit) {
log.debug("No GC needed, go back to sleep for now");
return false;
}
// do the GC
long deltaInKB = totalSize - limit;
log.debug("GC needed to free " + deltaInKB + " KB of data");
doGC(deltaInKB);
log.debug("GC terminated");
return true;
}