@Test public void testCacheIsUsed() throws IOException, InvalidRangeException { String filename = "file:TestAggExistingCache.xml"; System.out.printf("%s%n", filename); String cacheDirName = TestDir.temporaryLocalDataDir + "testAggExistingCache/"; System.out.printf("cacheDir=%s%n", cacheDirName); File cacheDir = new File(cacheDirName); FileUtils.deleteDirectory(cacheDir); // from commons-io assert !cacheDir.exists(); DiskCache2 cache = new DiskCache2(cacheDirName, false, 0, 0); cache.setAlwaysUseCache(true); Assert.assertEquals(cache.getRootDirectory(), cacheDirName); assert new File(cache.getRootDirectory()).exists(); Aggregation.setPersistenceCache(cache); AggregationExisting.countCacheUse = 0; try (NetcdfFile ncfile = NcMLReader.readNcML(new StringReader(ncml), filename, null)) { System.out.println(" TestNcmlAggExisting.open " + filename); Array ATssta = ncfile.readSection("ATssta(:,0,0,0)"); Assert.assertEquals(4, ATssta.getSize()); } Assert.assertEquals(0, AggregationExisting.countCacheUse); AggregationExisting.countCacheUse = 0; try (NetcdfFile ncfile = NcMLReader.readNcML(new StringReader(ncml), filename, null)) { System.out.println(" TestNcmlAggExisting.open " + filename); Array ATssta = ncfile.readSection("ATssta(:,0,0,0)"); Assert.assertEquals(4, ATssta.getSize()); } Assert.assertEquals(8, AggregationExisting.countCacheUse); }