belliottsmith commented on code in PR #65:
URL: https://github.com/apache/cassandra-accord/pull/65#discussion_r1442889538
##########
accord-core/src/test/java/accord/burn/BurnTest.java:
##########
@@ -217,21 +254,41 @@ static void burn(RandomSource random, TopologyFactory
topologyFactory, List<Id>
.asLongSupplier(forked);
};
- Verifier verifier = createVerifier(keyCount);
- SimulatedDelayedExecutorService globalExecutor = new
SimulatedDelayedExecutorService(queue, null);
-
+ SimulatedDelayedExecutorService globalExecutor = new
SimulatedDelayedExecutorService(queue, new ListAgent(1000L, failures::add,
retryBootstrap, (i1, i2) -> {
+ throw new IllegalAccessError("Global executor should enver get a
stale event");
+ }));
+ Int2ObjectHashMap<Verifier> validators = new Int2ObjectHashMap<>();
Function<CommandStore, AsyncExecutor> executor = ignore ->
globalExecutor;
MessageListener listener = MessageListener.get();
- Packet[] requests = toArray(generate(random, listener, executor,
clients, nodes, keyCount, operations), Packet[]::new);
+ if (keyCount > ((long) HASH_RANGE_END - (long) HASH_RANGE_START + 1L))
+ throw new AssertionError(String.format("Attempted to create %d
keys which is larger than the range (%d, %d]", keyCount, HASH_RANGE_START,
HASH_RANGE_END));
+ int[] keys = new int[keyCount];
+ {
+ IntHashSet seen = new IntHashSet();
+ for (int i = 0; i < keyCount; i++)
+ {
+ int hash;
+ do
+ {
+ // start is exclusive, and end is inclusive; which is the
oposite of nextInt, so +1 to account for this
+ hash = 1 + random.nextInt(HASH_RANGE_START,
HASH_RANGE_END);
+ }
+ while (!seen.add(hash));
+ keys[i] = CRCUtils.reverseCRC32LittleEnding(hash);
Review Comment:
What is it we're achieving here, with this refactor? This appears to give up
the possibility of hash collisions for reverse lookups, but what value do we
derive from reverse lookups?
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