Tarantool filer store (#6669)

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

docker/tarantool/router.lua

@@ -0,0 +1,77 @@
+local vshard = require('vshard')
+local log = require('log')
+
+-- Bootstrap the vshard router.
+while true do
+    local ok, err = vshard.router.bootstrap({
+        if_not_bootstrapped = true,
+    })
+    if ok then
+        break
+    end
+    log.info(('Router bootstrap error: %s'):format(err))
+end
+
+-- functions for filer_metadata space
+local filer_metadata = {
+    delete_by_directory_idx = function(directory)
+        -- find all storages
+        local storages = require('vshard').router.routeall()
+        -- on each storage
+        for _, storage in pairs(storages) do
+            -- call local function
+            local result, err = storage:callrw('filer_metadata.delete_by_directory_idx', { directory })
+            -- check for error
+            if err then
+                error("Failed to call function on storage: " .. tostring(err))
+            end
+        end
+        -- return
+        return true
+    end,
+    find_by_directory_idx_and_name = function(dirPath, startFileName, includeStartFile, limit)
+        -- init results
+        local results = {}
+        -- find all storages
+        local storages = require('vshard').router.routeall()
+        -- on each storage
+        for _, storage in pairs(storages) do
+            -- call local function
+            local result, err = storage:callro('filer_metadata.find_by_directory_idx_and_name', {
+                dirPath,
+                startFileName,
+                includeStartFile,
+                limit
+            })
+            -- check for error
+            if err then
+                error("Failed to call function on storage: " .. tostring(err))
+            end
+            -- add to results
+            for _, tuple in ipairs(result) do
+                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,
+}
+
+rawset(_G, 'filer_metadata', filer_metadata)
+
+-- register functions for filer_metadata space, set grants
+for name, _ in pairs(filer_metadata) do
+    box.schema.func.create('filer_metadata.' .. name, { if_not_exists = true })
+    box.schema.user.grant('app', 'execute', 'function', 'filer_metadata.' .. name, { if_not_exists = true })
+    box.schema.user.grant('client', 'execute', 'function', 'filer_metadata.' .. name, { if_not_exists = true })
+end