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Add support for db migrations

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This commit is contained in:
Nicolas Werner 2020-05-02 16:44:50 +02:00
parent 38417a374d
commit dad2de7ba2
15 changed files with 401 additions and 156 deletions
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36
src/Cache.cpp
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@ -665,8 +665,15 @@ Cache::deleteData()
}
}
//! migrates db to the current format
bool
Cache::isFormatValid()
Cache::runMigrations()
{
return true;
}
cache::CacheVersion
Cache::formatVersion()
{
auto txn = lmdb::txn::begin(env_, nullptr, MDB_RDONLY);
@ -676,18 +683,16 @@ Cache::isFormatValid()
txn.commit();
if (!res)
return false;
return cache::CacheVersion::Older;
std::string stored_version(current_version.data(), current_version.size());
if (stored_version != CURRENT_CACHE_FORMAT_VERSION) {
nhlog::db()->warn("breaking changes in the cache format. stored: {}, current: {}",
stored_version,
CURRENT_CACHE_FORMAT_VERSION);
return false;
}
return true;
if (stored_version < CURRENT_CACHE_FORMAT_VERSION)
return cache::CacheVersion::Older;
else if (stored_version > CURRENT_CACHE_FORMAT_VERSION)
return cache::CacheVersion::Older;
else
return cache::CacheVersion::Current;
}
void
@ -2468,10 +2473,17 @@ setup()
}
bool
isFormatValid()
runMigrations()
{
return instance_->isFormatValid();
return instance_->runMigrations();
}
cache::CacheVersion
formatVersion()
{
return instance_->formatVersion();
}
void
setCurrentFormat()
{