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Ref T29, allow to read CDbFlags::Shared in background

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This commit is contained in:
Klaus Basan
2017-07-13 23:49:06 +02:00
committed by Mathew Sutcliffe
parent 9e4cfca2cc
commit c81a56bcba
2 changed files with 34 additions and 14 deletions
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47
src/blackcore/db/databasereader.cpp
View File

@@ -57,24 +57,34 @@ namespace BlackCore
CEntityFlags::Entity allEntities = entities;
CEntityFlags::Entity cachedEntities = CEntityFlags::NoEntity;
CEntityFlags::Entity dbEntities = CEntityFlags::NoEntity;
CEntityFlags::Entity sharedEntities = CEntityFlags::NoEntity;
CEntityFlags::Entity currentEntity = CEntityFlags::iterateDbEntities(allEntities); // CEntityFlags::InfoObjectEntity will be ignored
while (currentEntity)
{
const CDatabaseReaderConfig config(this->getConfigForEntity(currentEntity));
const QString currentEntityName = CEntityFlags::flagToString(currentEntity);
const CDbFlags::DataRetrievalMode rm = config.getRetrievalMode();
// retrieval mode
const CDbFlags::DataRetrievalMode rm = config.getRetrievalMode(); // DB reading, cache, shared
Q_ASSERT_X(!rm.testFlag(CDbFlags::Unspecified), Q_FUNC_INFO, "Missing retrieval mode");
const QString rmString = CDbFlags::flagToString(rm);
const bool rmCacheOnly = (rm == CDbFlags::Cached);
Q_ASSERT_X(!rm.testFlag(CDbFlags::Unspecified), Q_FUNC_INFO, "Missing retrieval mode");
const CDbFlags::DataRetrievalModeFlag rmDbOrSharedFlag = CDbFlags::modeToModeFlag(rm & CDbFlags::DbReadingOrShared);
const QString rmDbOrSharedFlagString = CDbFlags::flagToString(rmDbOrSharedFlag);
const bool rmDbReadingOrShared = (rmDbOrSharedFlag == CDbFlags::DbReading || rmDbOrSharedFlag == CDbFlags::Shared);
if (rm.testFlag(CDbFlags::Ignore) || rm.testFlag(CDbFlags::Canceled))
{
// do not load
}
else if (rm.testFlag(CDbFlags::Cached))
{
// cache + shared or DB data
// info objects -> cache + shared or cache + DB data
if (hasInfoObjects)
{
// check mode here for consistency
Q_ASSERT_X(!getBaseUrl(rmDbOrSharedFlag).isEmpty(), Q_FUNC_INFO, "Wrong retrieval mode");
const bool changedUrl = this->hasChangedUrl(currentEntity);
const QDateTime cacheTs(this->getCacheTimestamp(currentEntity));
const QDateTime latestEntityTs(this->getLatestEntityTimestampFromDbInfoObjects(currentEntity));
@@ -85,24 +95,27 @@ namespace BlackCore
{
this->admitCaches(currentEntity);
cachedEntities |= currentEntity; // read from cache
CLogMessage(this).info("Using cache for %1 (%2, %3)") << currentEntityName << cacheTs.toString() << cacheTimestamp;
CLogMessage(this).info("Using cache for '%1' (%2, %3)") << currentEntityName << cacheTs.toString() << cacheTimestamp;
}
else
{
dbEntities |= currentEntity;
Q_ASSERT_X(rmDbReadingOrShared, Q_FUNC_INFO, "Wrong retrieval mode");
if (rmDbOrSharedFlag == CDbFlags::DbReading) { dbEntities |= currentEntity; }
else if (rmDbOrSharedFlag == CDbFlags::Shared) { sharedEntities |= currentEntity; }
if (changedUrl)
{
CLogMessage(this).info("Data location changed, will override cache for %1") << currentEntityName;
CLogMessage(this).info("Data location changed, will override cache for '%1' reading '%2'") << currentEntityName << rmDbOrSharedFlagString;
}
else
{
CLogMessage(this).info("Cache for %1 outdated, latest entity (%2, %3)") << currentEntityName << latestEntityTs.toString() << latestEntityTimestamp;
CLogMessage(this).info("Cache for '%1' outdated, latest entity (%2, %3), reading '%4'") << currentEntityName << latestEntityTs.toString() << latestEntityTimestamp << rmDbOrSharedFlagString;
}
}
}
else
{
// no info objects, server down or no info objects loaded
// no info objects, server down or no info objects loaded, e.g. cache only
this->admitCaches(currentEntity);
if (rmCacheOnly)
{
@@ -110,7 +123,7 @@ namespace BlackCore
}
else
{
CLogMessage(this).info("No info object for %1, triggered reading cache, read mode: %2") << currentEntityName << rmString;
CLogMessage(this).info("No info object for '%1', triggered reading cache, read mode: %2") << currentEntityName << rmString;
}
cachedEntities |= currentEntity; // read from cache
}
@@ -118,10 +131,9 @@ namespace BlackCore
else
{
// cache ignored
if (rm.testFlag(CDbFlags::DbReading))
{
dbEntities |= currentEntity;
}
Q_ASSERT_X(rmDbReadingOrShared, Q_FUNC_INFO, "Wrong retrieval mode");
if (rmDbOrSharedFlag == CDbFlags::DbReading) { dbEntities |= currentEntity; }
else if (rmDbOrSharedFlag == CDbFlags::Shared) { sharedEntities |= currentEntity; }
}
currentEntity = CEntityFlags::iterateDbEntities(allEntities);
}
@@ -135,8 +147,16 @@ namespace BlackCore
// Real read from DB
if (dbEntities != CEntityFlags::NoEntity)
{
CLogMessage(this).info("Start reading DB entities: %1") << CEntityFlags::flagToString(dbEntities);
this->startReadFromBackendInBackgroundThread(dbEntities, CDbFlags::DbReading, newerThan);
}
// Real read from shared
if (sharedEntities != CEntityFlags::NoEntity)
{
CLogMessage(this).info("Start reading shared entities: %1") << CEntityFlags::flagToString(sharedEntities);
this->startReadFromBackendInBackgroundThread(dbEntities, CDbFlags::Shared, newerThan);
}
}
CEntityFlags::Entity CDatabaseReader::triggerLoadingDirectlyFromDb(CEntityFlags::Entity entities, const QDateTime &newerThan)
@@ -461,7 +481,6 @@ namespace BlackCore
CUrl CDatabaseReader::getBaseUrl(CDbFlags::DataRetrievalModeFlag mode) const
{
if (!this->doWorkCheck()) { return CUrl(); }
Q_ASSERT_X(sApp, Q_FUNC_INFO, "Missing app object, URLs cannot be obtained");
switch (mode)
{

1
src/blackcore/db/databasereader.h
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@@ -318,6 +318,7 @@ namespace BlackCore
virtual void invalidateCaches(BlackMisc::Network::CEntityFlags::Entity entities) = 0;
//! Changed URL, means the cache values have been read from elsewhere
//! \remark testing based on BlackMisc::Db::CDbFlags::DbReading
virtual bool hasChangedUrl(BlackMisc::Network::CEntityFlags::Entity entity) const = 0;
//! Cache for given entity has changed