@Test
public void testRegionObserverFlushTimeStacking() throws Exception {
byte[] ROW = Bytes.toBytes("testRow");
byte[] TABLE = Bytes.toBytes(getClass().getName());
byte[] A = Bytes.toBytes("A");
byte[][] FAMILIES = new byte[][] {A};
Configuration conf = HBaseConfiguration.create();
HRegion region = initHRegion(TABLE, getClass().getName(), conf, FAMILIES);
RegionCoprocessorHost h = region.getCoprocessorHost();
h.load(NoDataFromFlush.class, Coprocessor.PRIORITY_HIGHEST, conf);
h.load(EmptyRegionObsever.class, Coprocessor.PRIORITY_USER, conf);
// put a row and flush it to disk
Put put = new Put(ROW);
put.add(A, A, A);
region.put(put);
region.flushcache();
Get get = new Get(ROW);
Result r = region.get(get);
assertNull(
"Got an unexpected number of rows - no data should be returned with the NoDataFromScan coprocessor. Found: "
+ r,
r.listCells());
}
// check each region whether the coprocessor upcalls are called or not.
private void verifyMethodResult(
Class<?> c, String methodName[], TableName tableName, Object value[]) throws IOException {
try {
for (JVMClusterUtil.RegionServerThread t : cluster.getRegionServerThreads()) {
if (!t.isAlive() || t.getRegionServer().isAborted() || t.getRegionServer().isStopping()) {
continue;
}
for (HRegionInfo r : ProtobufUtil.getOnlineRegions(t.getRegionServer())) {
if (!r.getTable().equals(tableName)) {
continue;
}
RegionCoprocessorHost cph =
t.getRegionServer().getOnlineRegion(r.getRegionName()).getCoprocessorHost();
Coprocessor cp = cph.findCoprocessor(c.getName());
assertNotNull(cp);
for (int i = 0; i < methodName.length; ++i) {
Method m = c.getMethod(methodName[i]);
Object o = m.invoke(cp);
assertTrue(
"Result of "
+ c.getName()
+ "."
+ methodName[i]
+ " is expected to be "
+ value[i].toString()
+ ", while we get "
+ o.toString(),
o.equals(value[i]));
}
}
}
} catch (Exception e) {
throw new IOException(e.toString());
}
}