/** {@inheritDoc} */
@Override
public void start0() throws GridException {
aff =
new GridAffinityAssignmentCache(
cctx,
cctx.namex(),
cctx.config().getAffinity(),
cctx.config().getAffinityMapper(),
cctx.config().getBackups());
// Generate internal keys for partitions.
int partCnt = partitions();
partAffKeys = new GridPartitionLockKey[partCnt];
Collection<Integer> found = new HashSet<>();
long affKey = 0;
while (true) {
GridPartitionLockKey key = new GridPartitionLockKey(affKey);
int part = aff.partition(key);
if (found.add(part)) {
// This is a key for not yet calculated partition.
key.partitionId(part);
partAffKeys[part] = key;
if (found.size() == partCnt) break;
}
affKey++;
if (affKey > partCnt * MAX_PARTITION_KEY_ATTEMPT_RATIO)
throw new IllegalStateException(
"Failed to calculate partition affinity keys for given affinity "
+ "function [attemptCnt="
+ affKey
+ ", found="
+ found
+ ", cacheName="
+ cctx.name()
+ ']');
}
}
/**
* NOTE: Use this method always when you need to calculate partition id for a key provided by
* user. It's required since we should apply affinity mapper logic in order to find a key that
* will eventually be passed to affinity function.
*
* @param key Key.
* @return Partition.
*/
public <T> int partition(T key) {
return aff.partition(key);
}