C++ LLViewerInventoryCategory::getVersion方法代码示例

bool LLInventoryCategoriesObserver::addCategory(const LLUUID& cat_id, callback_t cb)
{
	S32 version = LLViewerInventoryCategory::VERSION_UNKNOWN;
	S32 current_num_known_descendents = LLViewerInventoryCategory::DESCENDENT_COUNT_UNKNOWN;
	bool can_be_added = true;

	LLViewerInventoryCategory* category = gInventory.getCategory(cat_id);
	// If category could not be retrieved it might mean that
	// inventory is unusable at the moment so the category is
	// stored with VERSION_UNKNOWN and DESCENDENT_COUNT_UNKNOWN,
	// it may be updated later.
	if (category)
	{
		// Inventory category version is used to find out if some changes
		// to a category have been made.
		version = category->getVersion();

		LLInventoryModel::cat_array_t* cats;
		LLInventoryModel::item_array_t* items;
		gInventory.getDirectDescendentsOf(cat_id, cats, items);
		if (!cats || !items)
		{
			LL_WARNS() << "Category '" << category->getName() << "' descendents corrupted, fetch failed." << LL_ENDL;
			// NULL means the call failed -- cats/items map doesn't exist (note: this does NOT mean
			// that the cat just doesn't have any items or subfolders).
			// Unrecoverable, so just return "false" meaning that the category can't be observed.
			can_be_added = false;

			llassert(cats != NULL && items != NULL);
		}
		else
		{
			current_num_known_descendents = cats->size() + items->size();
		}
	}

	if (can_be_added)
	{
		mCategoryMap.insert(category_map_value_t(
								cat_id,LLCategoryData(cat_id, cb, version, current_num_known_descendents)));
	}

	return can_be_added;
}

void LLInventoryCategoriesObserver::changed(U32 mask)
{
	if (!mCategoryMap.size())
		return;

	std::vector<LLUUID> deleted_categories_ids;

	for (category_map_t::iterator iter = mCategoryMap.begin();
		 iter != mCategoryMap.end();
		 ++iter)
	{
		const LLUUID& cat_id = (*iter).first;
		LLCategoryData& cat_data = (*iter).second;
        
		LLViewerInventoryCategory* category = gInventory.getCategory(cat_id);
		if (!category)
        {
            LL_WARNS() << "Category : Category id = " << cat_id << " disappeared" << LL_ENDL;
			cat_data.mCallback();
            // Keep track of those deleted categories so we can remove them
            deleted_categories_ids.push_back(cat_id);
			continue;
        }

		const S32 version = category->getVersion();
		const S32 expected_num_descendents = category->getDescendentCount();
		if ((version == LLViewerInventoryCategory::VERSION_UNKNOWN) ||
			(expected_num_descendents == LLViewerInventoryCategory::DESCENDENT_COUNT_UNKNOWN))
		{
			continue;
		}

		// Check number of known descendents to find out whether it has changed.
		LLInventoryModel::cat_array_t* cats;
		LLInventoryModel::item_array_t* items;
		gInventory.getDirectDescendentsOf(cat_id, cats, items);
		if (!cats || !items)
		{
			LL_WARNS() << "Category '" << category->getName() << "' descendents corrupted, fetch failed." << LL_ENDL;
			// NULL means the call failed -- cats/items map doesn't exist (note: this does NOT mean
			// that the cat just doesn't have any items or subfolders).
			// Unrecoverable, so just skip this category.

			llassert(cats != NULL && items != NULL);

			continue;
		}
		
		const S32 current_num_known_descendents = cats->size() + items->size();

		bool cat_changed = false;

		// If category version or descendents count has changed
		// update category data in mCategoryMap
		if (version != cat_data.mVersion || current_num_known_descendents != cat_data.mDescendentsCount)
		{
			cat_data.mVersion = version;
			cat_data.mDescendentsCount = current_num_known_descendents;
			cat_changed = true;
		}

		// If any item names have changed, update the name hash 
		// Only need to check if (a) name hash has not previously been
		// computed, or (b) a name has changed.
		if (!cat_data.mIsNameHashInitialized || (mask & LLInventoryObserver::LABEL))
		{
			LLMD5 item_name_hash = gInventory.hashDirectDescendentNames(cat_id);
			if (cat_data.mItemNameHash != item_name_hash)
			{
				cat_data.mIsNameHashInitialized = true;
				cat_data.mItemNameHash = item_name_hash;
				cat_changed = true;
			}
		}

		// If anything has changed above, fire the callback.
		if (cat_changed)
			cat_data.mCallback();
	}
    
    // Remove deleted categories from the list
 	for (std::vector<LLUUID>::iterator deleted_id = deleted_categories_ids.begin(); deleted_id != deleted_categories_ids.end(); ++deleted_id)
	{
		removeCategory(*deleted_id);
    }
}

void LLInventoryModelBackgroundFetch::backgroundFetch()
{
	if (mBackgroundFetchActive && gAgent.getRegion())
	{
		// If we'll be using the capability, we'll be sending batches and the background thing isn't as important.
		std::string url = gAgent.getRegion()->getCapability("FetchInventoryDescendents2");   
		if (gSavedSettings.getBOOL("UseHTTPInventory") && !url.empty()) 
		{
			bulkFetch(url);
			return;
		}
		
#if 1
		//--------------------------------------------------------------------------------
		// DEPRECATED OLD CODE
		//

		// No more categories to fetch, stop fetch process.
		if (mFetchQueue.empty())
		{
			llinfos << "Inventory fetch completed" << llendl;

			setAllFoldersFetched();
			return;
		}

		F32 fast_fetch_time = lerp(mMinTimeBetweenFetches, mMaxTimeBetweenFetches, 0.1f);
		F32 slow_fetch_time = lerp(mMinTimeBetweenFetches, mMaxTimeBetweenFetches, 0.5f);
		if (mTimelyFetchPending && mFetchTimer.getElapsedTimeF32() > slow_fetch_time)
		{
			// Double timeouts on failure.
			mMinTimeBetweenFetches = llmin(mMinTimeBetweenFetches * 2.f, 10.f);
			mMaxTimeBetweenFetches = llmin(mMaxTimeBetweenFetches * 2.f, 120.f);
			llinfos << "Inventory fetch times grown to (" << mMinTimeBetweenFetches << ", " << mMaxTimeBetweenFetches << ")" << llendl;
			// fetch is no longer considered "timely" although we will wait for full time-out.
			mTimelyFetchPending = FALSE;
		}

		while(1)
		{
			if (mFetchQueue.empty())
			{
				break;
			}

			if(gDisconnected)
			{
				// Just bail if we are disconnected.
				break;
			}

			const FetchQueueInfo info = mFetchQueue.front();
			LLViewerInventoryCategory* cat = gInventory.getCategory(info.mCatUUID);

			// Category has been deleted, remove from queue.
			if (!cat)
			{
				mFetchQueue.pop_front();
				continue;
			}
			
			if (mFetchTimer.getElapsedTimeF32() > mMinTimeBetweenFetches && 
				LLViewerInventoryCategory::VERSION_UNKNOWN == cat->getVersion())
			{
				// Category exists but has no children yet, fetch the descendants
				// for now, just request every time and rely on retry timer to throttle.
				if (cat->fetch())
				{
					mFetchTimer.reset();
					mTimelyFetchPending = TRUE;
				}
				else
				{
					//  The catagory also tracks if it has expired and here it says it hasn't
					//  yet.  Get out of here because nothing is going to happen until we
					//  update the timers.
					break;
				}
			}
			// Do I have all my children?
			else if (gInventory.isCategoryComplete(info.mCatUUID))
			{
				// Finished with this category, remove from queue.
				mFetchQueue.pop_front();

				// Add all children to queue.
				LLInventoryModel::cat_array_t* categories;
				LLInventoryModel::item_array_t* items;
				gInventory.getDirectDescendentsOf(cat->getUUID(), categories, items);
				for (LLInventoryModel::cat_array_t::const_iterator it = categories->begin();
					 it != categories->end();
					 ++it)
				{
					mFetchQueue.push_back(FetchQueueInfo((*it)->getUUID(),info.mRecursive));
				}

				// We received a response in less than the fast time.
				if (mTimelyFetchPending && mFetchTimer.getElapsedTimeF32() < fast_fetch_time)
				{
					// Shrink timeouts based on success.
//.........这里部分代码省略.........

void AISUpdate::doUpdate()
{
	// Do version/descendent accounting.
	for (std::map<LLUUID,S32>::const_iterator catit = mCatDescendentDeltas.begin();
		 catit != mCatDescendentDeltas.end(); ++catit)
	{
		LL_DEBUGS("Inventory") << "descendent accounting for " << catit->first << LL_ENDL;

		const LLUUID cat_id(catit->first);
		// Don't account for update if we just created this category.
		if (mCategoriesCreated.find(cat_id) != mCategoriesCreated.end())
		{
			LL_DEBUGS("Inventory") << "Skipping version increment for new category " << cat_id << LL_ENDL;
			continue;
		}

		// Don't account for update unless AIS told us it updated that category.
		if (mCatVersionsUpdated.find(cat_id) == mCatVersionsUpdated.end())
		{
			LL_DEBUGS("Inventory") << "Skipping version increment for non-updated category " << cat_id << LL_ENDL;
			continue;
		}

		// If we have a known descendent count, set that now.
		LLViewerInventoryCategory* cat = gInventory.getCategory(cat_id);
		if (cat)
		{
			S32 descendent_delta = catit->second;
			S32 old_count = cat->getDescendentCount();
			LL_DEBUGS("Inventory") << "Updating descendent count for "
								   << cat->getName() << " " << cat_id
								   << " with delta " << descendent_delta << " from "
								   << old_count << " to " << (old_count+descendent_delta) << LL_ENDL;
			LLInventoryModel::LLCategoryUpdate up(cat_id, descendent_delta);
			gInventory.accountForUpdate(up);
		}
		else
		{
			LL_DEBUGS("Inventory") << "Skipping version accounting for unknown category " << cat_id << LL_ENDL;
		}
	}

	// CREATE CATEGORIES
	for (deferred_category_map_t::const_iterator create_it = mCategoriesCreated.begin();
		 create_it != mCategoriesCreated.end(); ++create_it)
	{
		LLUUID category_id(create_it->first);
		LLPointer<LLViewerInventoryCategory> new_category = create_it->second;

		gInventory.updateCategory(new_category, LLInventoryObserver::CREATE);
		LL_DEBUGS("Inventory") << "created category " << category_id << LL_ENDL;
	}

	// UPDATE CATEGORIES
	for (deferred_category_map_t::const_iterator update_it = mCategoriesUpdated.begin();
		 update_it != mCategoriesUpdated.end(); ++update_it)
	{
		LLUUID category_id(update_it->first);
		LLPointer<LLViewerInventoryCategory> new_category = update_it->second;
		// Since this is a copy of the category *before* the accounting update, above,
		// we need to transfer back the updated version/descendent count.
		LLViewerInventoryCategory* curr_cat = gInventory.getCategory(new_category->getUUID());
		if (!curr_cat)
		{
			LL_WARNS("Inventory") << "Failed to update unknown category " << new_category->getUUID() << LL_ENDL;
		}
		else
		{
			new_category->setVersion(curr_cat->getVersion());
			new_category->setDescendentCount(curr_cat->getDescendentCount());
			gInventory.updateCategory(new_category);
			LL_DEBUGS("Inventory") << "updated category " << new_category->getName() << " " << category_id << LL_ENDL;
		}
	}

	// CREATE ITEMS
	for (deferred_item_map_t::const_iterator create_it = mItemsCreated.begin();
		 create_it != mItemsCreated.end(); ++create_it)
	{
		LLUUID item_id(create_it->first);
		LLPointer<LLViewerInventoryItem> new_item = create_it->second;

		// FIXME risky function since it calls updateServer() in some
		// cases.  Maybe break out the update/create cases, in which
		// case this is create.
		LL_DEBUGS("Inventory") << "created item " << item_id << LL_ENDL;
		gInventory.updateItem(new_item, LLInventoryObserver::CREATE);
	}
	
	// UPDATE ITEMS
	for (deferred_item_map_t::const_iterator update_it = mItemsUpdated.begin();
		 update_it != mItemsUpdated.end(); ++update_it)
	{
		LLUUID item_id(update_it->first);
		LLPointer<LLViewerInventoryItem> new_item = update_it->second;
		// FIXME risky function since it calls updateServer() in some
		// cases.  Maybe break out the update/create cases, in which
		// case this is update.
		LL_DEBUGS("Inventory") << "updated item " << item_id << LL_ENDL;
		//LL_DEBUGS("Inventory") << ll_pretty_print_sd(new_item->asLLSD()) << LL_ENDL;
//.........这里部分代码省略.........