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before removing referrer code

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This commit is contained in:
Wouter den Breejen 2007-08-03 10:30:39 +00:00
parent 4fb9070fbd
commit 7d91f62b71
3 changed files with 7 additions and 133 deletions
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87
src/libstore/local-store.cc
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@ -451,25 +451,12 @@ void setReferences(const Transaction & txn, const Path & store_or_statePath,
nixDB.setStrings(txn, dbComponentComponentReferences, store_or_statePath, Paths(references.begin(), references.end()));
nixDB.setStrings(txn, dbComponentStateReferences, store_or_statePath, Paths(stateReferences.begin(), stateReferences.end()));
//Handle referrers like the old way, because references (and so referrers) referrers never change (So these do not have a timestamp)
//dbComponentComponentReferrers
//dbComponentStateReferrers
/*
references c -> c
oldReferences
stateReferences c -> s
oldStateReferences
*/
//TODO
}
else if(isRealisableStatePath(txn, store_or_statePath))
{
//Write references and referrers to a special revision (since there are multiple revisions of a statePath)
//Write references to a special revision (since there are multiple revisions of a statePath)
//query the references of revision (-1 is query the latest references)
Paths oldStateReferences_s_c;
@ -483,19 +470,6 @@ void setReferences(const Transaction & txn, const Path & store_or_statePath,
//set the references of revision (-1 insert as a new timestamp)
nixDB.setStateReferences(txn, dbStateComponentReferences, dbStateRevisions, store_or_statePath, Paths(references.begin(), references.end()), revision);
nixDB.setStateReferences(txn, dbStateStateReferences, dbStateRevisions, store_or_statePath, Paths(stateReferences.begin(), stateReferences.end()), revision);
//REFERRERS
//for all references old and new, state and component
PathSet all_references = pathSets_union(references, oldReferences);
PathSet all_stateReferences = pathSets_union(oldStateReferences, stateReferences);
for (PathSet::const_iterator i = all_references.begin(); i != all_references.end(); ++i)
nixDB.updateReferredPath(txn, dbStateRevisions, dbComponentStateReferrers, *i, store_or_statePath, revision);
for (PathSet::const_iterator i = all_stateReferences.begin(); i != all_stateReferences.end(); ++i)
nixDB.updateReferredPath(txn, dbStateRevisions, dbStateStateReferrers, *i, store_or_statePath, revision);
}
else
throw Error(format("Path '%1%' is not a valid component or state path") % store_or_statePath);
@ -585,59 +559,12 @@ static PathSet getXReferrers(const Transaction & txn, const Path & store_or_stat
PathSet referrers;
if(isValidPathTxn(txn, store_or_statePath) || isValidStatePathTxn(txn, store_or_statePath)){
//Lookup its where it points to if its shared
Path store_or_statePath_ns;
if(isValidStatePathTxn(txn, store_or_statePath))
store_or_statePath_ns = toNonSharedPathTxn(txn, store_or_statePath);
map<string, int> possible_referrers; //referrer at timestamp
Strings keys;
nixDB.enumTable(txn, table, keys);
for (Strings::iterator i = keys.begin(); i != keys.end(); ++i){
if( (*i).substr(0, store_or_statePath_ns.length()) == store_or_statePath_ns){
if( (*i).length() == store_or_statePath_ns.length() )
referrers.insert(*i); //referrers from components
else{
//now filter the latest of each value
Path empty;
int timestamp;
nixDB.splitDBKey(*i, empty, timestamp);
string data;
nixDB.queryString(txn, table, *i, data);
Path statePath;
int added_or_removed;
nixDB.splitDBKey(data, statePath, added_or_removed);
if(possible_referrers[statePath] != 0) //if not yet set
if(timestamp > possible_referrers[statePath])
possible_referrers[statePath] = timestamp;
else
possible_referrers[statePath] = timestamp;
}
}
}
//Check wheter the latest was added or deleted
for (map<string, int>::iterator i = possible_referrers.begin(); i != possible_referrers.end(); ++i){
string data;
nixDB.queryString(txn, table, nixDB.mergeToDBKey(store_or_statePath_ns, (*i).second), data);
Path statePath;
int added_or_removed;
nixDB.splitDBKey(data, statePath, added_or_removed);
if(added_or_removed == 1) //now filter on -0 (removed) or -1 (added)
referrers.insert(statePath);
}
return referrers;
if(isValidPathTxn(txn, store_or_statePath)){
}
else if(isValidStatePathTxn(txn, store_or_statePath)){
Path statePath_ns = toNonSharedPathTxn(txn, store_or_statePath); //Lookup its where it points to if its shared
}
else
throw Error(format("Path '%1%' is not a valid component or state path") % store_or_statePath);