void
dhblock_keyhash_srv::real_store (chordID key, str od, str nd, u_int32_t exp, cb_dhstat cb)
{
u_int32_t v1 = dhblock_keyhash::version (nd.cstr (), nd.len ());
if (od.len ()) {
u_int32_t v0 = dhblock_keyhash::version (od.cstr (), od.len ());
if (v0 > v1) {
chordID p = node->my_pred ()->id ();
chordID m = node->my_ID ();
if (betweenrightincl (p, m, key))
cb (DHASH_STALE);
else
cb (DHASH_RETRY);
} else {
info << "db delete: " << key << "\n";
db->remove (key, v0,
wrap (this, &dhblock_keyhash_srv::delete_cb, key,
nd, v1, exp, cb));
}
} else {
info << "db write: " << node->my_ID ()
<< " N " << key << " " << nd.len () << "\n";
db_store (key, nd, v1, exp, cb);
}
}
void
vnode_impl::find_succlist_hop_cb (cbroute_t cb, route_iterator *ri, u_long m,
bool done)
{
static bool shave = true;
static bool initialized = false;
if (!initialized) {
int x = 1;
assert (Configurator::only ().get_int ("chord.find_succlist_shaving", x));
shave = (x == 1);
initialized = true;
}
vec<chord_node> cs = ri->successors ();
if (done) {
cb (cs, ri->path (), ri->status ());
delete ri;
return;
}
if (shave) {
size_t left = 0;
if (cs.size () < m)
left = cs.size ();
else
left = cs.size () - m;
for (size_t i = 1; i < left; i++) {
if (betweenrightincl (cs[i-1].x, cs[i].x, ri->key ())) {
trace << myID << ": find_succlist (" << ri->key () << "): skipping " << i << " nodes.\n";
cs.popn_front (i);
cb (cs, ri->path (), ri->status ());
delete ri;
return;
}
}
}
ri->next_hop ();
}
void
pmaint::pmaint_gotkey (adb_status stat, u_int32_t id, vec<adb_keyaux_t> keys)
{
if (stat == ADB_OK && keys.size () > 0) {
chordID key = keys[0].key;
pmaint_getkeys_id = id;
vec<ptr<location> > preds = host_node->preds ();
if (preds.size () >= dhblock_chash::num_efrags () &&
betweenrightincl (preds[dhblock_chash::num_efrags () - 1]->id(),
host_node->my_ID (),
key)) {
active_cb = delaycb (PRTTMTINY, wrap (this, &pmaint::pmaint_next));
return;
}
cli->lookup (key, wrap (this, &pmaint::pmaint_lookup, key));
active_cb = NULL;
} else {
//data base is empty
//check back later
info << host_node->my_ID () << " PMAINT NEXT: db empty\n";
active_cb = delaycb (PRTTMLONG, wrap (this, &pmaint::pmaint_next));
}
}
