How to use

org.apache.druid.server.coordination.ChangeRequestHistory$Counter

constructor

new ChangeRequestHistory.Counter(
  counter,
  hash

new ChangeRequestHistory.Counter(
  counter,
  hash

  new ChangeRequestHistory.Counter(-1, -1)
).get();
Assert.assertEquals(testSegments.size(), snapshot.getRequests().size());
  new ChangeRequestHistory.Counter(-1, -1)
).get();
Assert.assertEquals(0, snapshot.getRequests().size());

new ChangeRequestHistory.Counter(
  counter,
  hash

new ChangeRequestHistory.Counter(
  counter,
  hash

public Counter inc()
{
 return new Counter(counter + 1);
}

.getChangesSince(new ChangeRequestHistory.Counter(-1, 0))
.get();

  new ChangeRequestHistory.Counter(-1, -1)
).get();
Assert.assertEquals(2, snapshot.getRequests().size());
  new ChangeRequestHistory.Counter(-1, -1)
).get();
Assert.assertEquals(0, snapshot.getRequests().size());

@Test
public void testCounterHashMismatch() throws Exception
{
 ChangeRequestHistory<DataSegmentChangeRequest> history = new ChangeRequestHistory(3);
 Assert.assertTrue(history.getRequestsSince(new ChangeRequestHistory.Counter(0, 1234)).get().isResetCounter());
 history.addChangeRequest(new SegmentChangeRequestNoop());
 ChangeRequestHistory.Counter one = history.getLastCounter();
 history.addChangeRequest(new SegmentChangeRequestNoop());
 ChangeRequestHistory.Counter two = history.getLastCounter();
 Assert.assertTrue(history.getRequestsSince(new ChangeRequestHistory.Counter(0, 1234)).get().isResetCounter());
 ChangeRequestsSnapshot<DataSegmentChangeRequest> snapshot = history.getRequestsSince(one).get();
 Assert.assertEquals(1, snapshot.getRequests().size());
 Assert.assertEquals(2, snapshot.getCounter().getCounter());
 Assert.assertTrue(history.getRequestsSince(new ChangeRequestHistory.Counter(1, 1234)).get().isResetCounter());
 history.addChangeRequest(new SegmentChangeRequestNoop());
 ChangeRequestHistory.Counter three = history.getLastCounter();
 history.addChangeRequest(new SegmentChangeRequestNoop());
 ChangeRequestHistory.Counter four = history.getLastCounter();
 snapshot = history.getRequestsSince(two).get();
 Assert.assertEquals(2, snapshot.getRequests().size());
 Assert.assertEquals(4, snapshot.getCounter().getCounter());
 Assert.assertTrue(history.getRequestsSince(new ChangeRequestHistory.Counter(2, 1234)).get().isResetCounter());
}

public Counter inc()
{
 return new Counter(counter + 1);
}