// the end of the scanner. So this is asking for 2 of the 3 rows we inserted.
for (Result result : scanner.next(numRecords - 1)) {
}
scanner.close();
ScanMetrics scanMetrics = getScanMetrics(scan);
assertEquals("Did not access all the regions in the table", numOfRegions,
scanMetrics.countOfRegions.getCurrentIntervalValue());
// set caching to 100
scan = new Scan();
scan.setCaching(100);
scan.setAttribute(Scan.SCAN_ATTRIBUTES_METRICS_ENABLE, Bytes.toBytes(Boolean.TRUE));
scanner = ht.getScanner(scan);
for (Result result : scanner.next(numRecords - 1)) {
}
scanner.close();
scanMetrics = getScanMetrics(scan);
assertEquals("Did not access all the regions in the table", numOfRegions,
scanMetrics.countOfRegions.getCurrentIntervalValue());
// now, test that the metrics are still collected even if you don't call close, but do
// run past the end of all the records
Scan scanWithoutClose = new Scan();
scanWithoutClose.setAttribute(Scan.SCAN_ATTRIBUTES_METRICS_ENABLE, Bytes.toBytes(Boolean.TRUE));
ResultScanner scannerWithoutClose = ht.getScanner(scanWithoutClose);
for (Result result : scannerWithoutClose.next(numRecords + 1)) {
}
ScanMetrics scanMetricsWithoutClose = getScanMetrics(scanWithoutClose);
assertEquals("Did not access all the regions in the table", numOfRegions,
scanMetricsWithoutClose.countOfRegions.getCurrentIntervalValue());
// finally, test that the metrics are collected correctly if you both run past all the records,
// AND close the scanner
Scan scanWithClose = new Scan();
scanWithClose.setAttribute(Scan.SCAN_ATTRIBUTES_METRICS_ENABLE, Bytes.toBytes(Boolean.TRUE));
ResultScanner scannerWithClose = ht.getScanner(scanWithClose);
for (Result result : scannerWithClose.next(numRecords + 1)) {
}
scannerWithClose.close();
ScanMetrics scanMetricsWithClose = getScanMetrics(scanWithClose);
assertEquals("Did not access all the regions in the table", numOfRegions,
scanMetricsWithClose.countOfRegions.getCurrentIntervalValue());
}