void killSession(long session, long zxid) {
// the list is already removed from the ephemerals
// so we do not have to worry about synchronizing on
// the list. This is only called from FinalRequestProcessor
// so there is no need for synchronization. The list is not
// changed here. Only create and delete change the list which
// are again called from FinalRequestProcessor in sequence.
HashSet<String> list = ephemerals.remove(session);
if (list != null) {
for (String path : list) {
try {
deleteNode(path, zxid);
if (LOG.isDebugEnabled()) {
LOG.debug(
"Deleting ephemeral node " + path + " for session 0x" + Long.toHexString(session));
}
} catch (NoNodeException e) {
LOG.warn(
"Ignoring NoNodeException for path "
+ path
+ " while removing ephemeral for dead session 0x"
+ Long.toHexString(session));
}
}
}
}
public ProcessTxnResult processTxn(TxnHeader header, Record txn) {
ProcessTxnResult rc = new ProcessTxnResult();
String debug = "";
try {
rc.clientId = header.getClientId();
rc.cxid = header.getCxid();
rc.zxid = header.getZxid();
rc.type = header.getType();
rc.err = 0;
if (rc.zxid > lastProcessedZxid) {
lastProcessedZxid = rc.zxid;
}
switch (header.getType()) {
case OpCode.create:
CreateTxn createTxn = (CreateTxn) txn;
debug = "Create transaction for " + createTxn.getPath();
createNode(
createTxn.getPath(),
createTxn.getData(),
createTxn.getAcl(),
createTxn.getEphemeral() ? header.getClientId() : 0,
header.getZxid(),
header.getTime());
rc.path = createTxn.getPath();
break;
case OpCode.delete:
DeleteTxn deleteTxn = (DeleteTxn) txn;
debug = "Delete transaction for " + deleteTxn.getPath();
deleteNode(deleteTxn.getPath(), header.getZxid());
break;
case OpCode.setData:
SetDataTxn setDataTxn = (SetDataTxn) txn;
debug = "Set data for transaction for " + setDataTxn.getPath();
rc.stat =
setData(
setDataTxn.getPath(),
setDataTxn.getData(),
setDataTxn.getVersion(),
header.getZxid(),
header.getTime());
break;
case OpCode.setACL:
SetACLTxn setACLTxn = (SetACLTxn) txn;
debug = "Set ACL for transaction for " + setACLTxn.getPath();
rc.stat = setACL(setACLTxn.getPath(), setACLTxn.getAcl(), setACLTxn.getVersion());
break;
case OpCode.closeSession:
killSession(header.getClientId(), header.getZxid());
break;
case OpCode.error:
ErrorTxn errTxn = (ErrorTxn) txn;
rc.err = errTxn.getErr();
break;
}
} catch (KeeperException e) {
// These are expected errors since we take a lazy snapshot
if (initialized || (e.code() != Code.NONODE && e.code() != Code.NODEEXISTS)) {
LOG.warn("Failed:" + debug, e);
}
}
return rc;
}