Tarantool filer store (#6669)

Co-authored-by: Marat Karimov <m.karimov@digitalms.ru>

docker/tarantool/storage.lua

@@ -0,0 +1,97 @@
+box.watch('box.status', function()
+    if box.info.ro then
+        return
+    end
+
+    -- ====================================
+    -- key_value space
+    -- ====================================
+    box.schema.create_space('key_value', {
+        format = {
+            { name = 'key', type = 'string' },
+            { name = 'bucket_id', type = 'unsigned' },
+            { name = 'value', type = 'string' }
+        },
+        if_not_exists = true
+    })
+
+    -- create key_value space indexes
+    box.space.key_value:create_index('id', {type = 'tree', parts = { 'key' }, unique = true, if_not_exists = true})
+    box.space.key_value:create_index('bucket_id', { type = 'tree', parts = { 'bucket_id' }, unique = false, if_not_exists = true })
+
+    -- ====================================
+    -- filer_metadata space
+    -- ====================================
+    box.schema.create_space('filer_metadata', {
+        format = {
+            { name = 'directory', type = 'string' },
+            { name = 'bucket_id', type = 'unsigned' },
+            { name = 'name', type = 'string' },
+            { name = 'expire_at', type = 'unsigned' },
+            { name = 'data', type = 'string' }
+        },
+        if_not_exists = true
+    })
+
+    -- create filer_metadata space indexes
+    box.space.filer_metadata:create_index('id', {type = 'tree', parts = { 'directory', 'name' }, unique = true, if_not_exists = true})
+    box.space.filer_metadata:create_index('bucket_id', { type = 'tree', parts = { 'bucket_id' }, unique = false, if_not_exists = true })
+    box.space.filer_metadata:create_index('directory_idx', { type = 'tree', parts = { 'directory' }, unique = false, if_not_exists = true })
+    box.space.filer_metadata:create_index('name_idx', { type = 'tree', parts = { 'name' }, unique = false, if_not_exists = true })
+    box.space.filer_metadata:create_index('expire_at_idx', { type = 'tree', parts = { 'expire_at' }, unique = false, if_not_exists = true})
+end)
+
+-- functions for filer_metadata space
+local filer_metadata = {
+    delete_by_directory_idx = function(directory)
+        local space = box.space.filer_metadata
+        local index = space.index.directory_idx
+        -- for each finded directories
+        for _, tuple in index:pairs({ directory }, { iterator = 'EQ' }) do
+            space:delete({ tuple[1], tuple[3] })
+        end
+        return true
+    end,
+    find_by_directory_idx_and_name = function(dirPath, startFileName, includeStartFile, limit)
+        local space = box.space.filer_metadata
+        local directory_idx = space.index.directory_idx
+        -- choose filter name function
+        local filter_filename_func
+        if includeStartFile then
+            filter_filename_func = function(value) return value >= startFileName end
+        else
+            filter_filename_func = function(value) return value > startFileName end
+        end
+        -- init results
+        local results = {}
+        -- for each finded directories
+        for _, tuple in directory_idx:pairs({ dirPath }, { iterator = 'EQ' }) do
+            -- filter by name
+            if filter_filename_func(tuple[3]) then
+                table.insert(results, tuple)
+            end
+        end
+        -- sort
+        table.sort(results, function(a, b) return a[3] < b[3] end)
+        -- apply limit
+        if #results > limit then
+            local limitedResults = {}
+            for i = 1, limit do
+                table.insert(limitedResults, results[i])
+            end
+            results = limitedResults
+        end
+        -- return
+        return results
+    end,
+    is_expired = function(args, tuple)
+        return (tuple[4] > 0) and (require('fiber').time() > tuple[4])
+    end
+}
+
+-- register functions for filer_metadata space, set grants
+rawset(_G, 'filer_metadata', filer_metadata)
+for name, _ in pairs(filer_metadata) do
+    box.schema.func.create('filer_metadata.' .. name, { setuid = true, if_not_exists = true })
+    box.schema.user.grant('storage', 'execute', 'function', 'filer_metadata.' .. name, { if_not_exists = true })
+end