/**
* @param mapping Mappings.
* @param key Key to map.
* @param topVer Topology version.
* @return Near lock mapping.
* @throws GridException If mapping for key failed.
*/
private GridNearLockMapping<K, V> map(
K key, @Nullable GridNearLockMapping<K, V> mapping, long topVer) throws GridException {
assert mapping == null || mapping.node() != null;
GridNode primary = cctx.affinity().primary(key, topVer);
if (cctx.discovery().node(primary.id()) == null)
// If primary node left the grid before lock acquisition, fail the whole future.
throw newTopologyException(null, primary.id());
if (inTx() && tx.groupLock() && !primary.isLocal())
throw new GridException(
"Failed to start group lock transaction (local node is not primary for "
+ " key) [key="
+ key
+ ", primaryNodeId="
+ primary.id()
+ ']');
if (mapping == null || !primary.id().equals(mapping.node().id()))
mapping = new GridNearLockMapping<>(primary, key);
else mapping.addKey(key);
return mapping;
}
/** Initializes future. */
public void prepare() {
if (log.isDebugEnabled())
log.debug("Checking if transaction was committed on remote nodes: " + tx);
// Check local node first (local node can be a backup node for some part of this transaction).
long originatingThreadId = tx.threadId();
if (tx instanceof GridCacheTxRemoteEx)
originatingThreadId = ((GridCacheTxRemoteEx) tx).remoteThreadId();
GridCacheCommittedTxInfo<K, V> txInfo =
cctx.tm().txCommitted(tx.nearXidVersion(), tx.eventNodeId(), originatingThreadId);
if (txInfo != null) {
onDone(txInfo);
markInitialized();
return;
}
Collection<GridNode> checkNodes = CU.remoteNodes(cctx, tx.topologyVersion());
if (tx instanceof GridDhtTxRemote) {
// If we got primary node failure and near node has not failed.
if (tx.nodeId().equals(failedNodeId) && !tx.eventNodeId().equals(failedNodeId)) {
nearCheck = true;
GridNode nearNode = cctx.discovery().node(tx.eventNodeId());
if (nearNode == null) {
// Near node failed, separate check prepared future will take care of it.
onDone(
new GridTopologyException(
"Failed to check near transaction state (near node left grid): "
+ tx.eventNodeId()));
return;
}
checkNodes = Collections.singletonList(nearNode);
}
}
for (GridNode rmtNode : checkNodes) {
// Skip left nodes and local node.
if (rmtNode.id().equals(failedNodeId)) continue;
/*
* Send message to all cache nodes in the topology.
*/
MiniFuture fut = new MiniFuture(rmtNode.id());
GridCachePessimisticCheckCommittedTxRequest<K, V> req =
new GridCachePessimisticCheckCommittedTxRequest<>(
tx, originatingThreadId, futureId(), fut.futureId());
add(fut);
try {
cctx.io().send(rmtNode.id(), req);
} catch (GridTopologyException ignored) {
fut.onNodeLeft();
} catch (GridException e) {
fut.onError(e);
break;
}
}
markInitialized();
}