/**
* @param nodeId Sender node ID.
* @param msg Response to prepare request.
*/
private void processPrepareResponse(UUID nodeId, GridDistributedTxPrepareResponse<K, V> msg) {
assert nodeId != null;
assert msg != null;
GridReplicatedTxLocal<K, V> tx = ctx.tm().tx(msg.version());
if (tx == null) {
if (log.isDebugEnabled())
log.debug(
"Received prepare response for non-existing transaction [senderNodeId="
+ nodeId
+ ", res="
+ msg
+ ']');
return;
}
GridReplicatedTxPrepareFuture<K, V> future = (GridReplicatedTxPrepareFuture<K, V>) tx.future();
if (future != null) future.onResult(nodeId, msg);
else
U.error(
log,
"Received prepare response for transaction with no future [res="
+ msg
+ ", tx="
+ tx
+ ']');
}
/**
* @param nodeId Sender node ID.
* @param msg Prepare request.
*/
@SuppressWarnings({"InstanceofCatchParameter"})
private void processPrepareRequest(UUID nodeId, GridDistributedTxPrepareRequest<K, V> msg) {
assert nodeId != null;
assert msg != null;
GridReplicatedTxRemote<K, V> tx = null;
GridDistributedTxPrepareResponse<K, V> res;
try {
tx =
new GridReplicatedTxRemote<K, V>(
ctx.deploy().globalLoader(),
nodeId,
msg.threadId(),
msg.version(),
msg.commitVersion(),
msg.concurrency(),
msg.isolation(),
msg.isInvalidate(),
msg.timeout(),
msg.reads(),
msg.writes(),
ctx);
tx = ctx.tm().onCreated(tx);
if (tx == null || !ctx.tm().onStarted(tx))
throw new GridCacheTxRollbackException("Attempt to start a completed transaction: " + tx);
// Prepare prior to reordering, so the pending locks added
// in prepare phase will get properly ordered as well.
tx.prepare();
// Add remote candidates and reorder completed and uncompleted versions.
tx.addRemoteCandidates(
msg.candidatesByKey(), msg.committedVersions(), msg.rolledbackVersions());
if (msg.concurrency() == EVENTUALLY_CONSISTENT) {
if (log.isDebugEnabled()) log.debug("Committing transaction during remote prepare: " + tx);
tx.commit();
if (log.isDebugEnabled()) log.debug("Committed transaction during remote prepare: " + tx);
// Don't send response.
return;
}
res = new GridDistributedTxPrepareResponse<K, V>(msg.version());
Map<K, Collection<GridCacheMvccCandidate<K>>> cands = tx.localCandidates();
// Add local candidates (completed version must be set below).
res.candidates(cands);
} catch (GridException e) {
if (e instanceof GridCacheTxRollbackException) {
if (log.isDebugEnabled())
log.debug("Transaction was rolled back before prepare completed: " + tx);
} else if (e instanceof GridCacheTxOptimisticException) {
if (log.isDebugEnabled())
log.debug("Optimistic failure for remote transaction (will rollback): " + tx);
} else {
U.error(log, "Failed to process prepare request: " + msg, e);
}
if (tx != null)
// Automatically rollback remote transactions.
tx.rollback();
// Don't send response.
if (msg.concurrency() == EVENTUALLY_CONSISTENT) return;
res = new GridDistributedTxPrepareResponse<K, V>(msg.version());
res.error(e);
}
// Add completed versions.
res.completedVersions(
ctx.tm().committedVersions(msg.version()), ctx.tm().rolledbackVersions(msg.version()));
assert msg.concurrency() != EVENTUALLY_CONSISTENT;
GridNode node = ctx.discovery().node(nodeId);
if (node != null) {
try {
// Reply back to sender.
ctx.io().send(node, res);
} catch (GridException e) {
U.error(
log,
"Failed to send tx response to node (did the node leave grid?) [node="
+ node.id()
+ ", msg="
+ res
+ ']',
e);
if (tx != null) tx.rollback();
}
}
}
