import * as tslib_1 from "tslib";
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import { Table } from "../schema-builder/table/Table";
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import { SqlServerDriver } from "../driver/sqlserver/SqlServerDriver";
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import { MssqlParameter } from "../driver/sqlserver/MssqlParameter";
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import { OracleDriver } from "../driver/oracle/OracleDriver";
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/**
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* Caches query result into current database, into separate table called "query-result-cache".
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*/
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var DbQueryResultCache = /** @class */ (function () {
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// -------------------------------------------------------------------------
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// Constructor
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// -------------------------------------------------------------------------
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function DbQueryResultCache(connection) {
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this.connection = connection;
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var options = this.connection.driver.options;
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var cacheOptions = typeof this.connection.options.cache === "object" ? this.connection.options.cache : {};
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var cacheTableName = cacheOptions.tableName || "query-result-cache";
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this.queryResultCacheTable = this.connection.driver.buildTableName(cacheTableName, options.schema, options.database);
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}
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// -------------------------------------------------------------------------
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// Public Methods
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// -------------------------------------------------------------------------
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/**
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* Creates a connection with given cache provider.
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*/
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DbQueryResultCache.prototype.connect = function () {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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return tslib_1.__generator(this, function (_a) {
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return [2 /*return*/];
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});
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});
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};
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/**
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* Disconnects with given cache provider.
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*/
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DbQueryResultCache.prototype.disconnect = function () {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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return tslib_1.__generator(this, function (_a) {
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return [2 /*return*/];
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});
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});
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};
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/**
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* Creates table for storing cache if it does not exist yet.
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*/
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DbQueryResultCache.prototype.synchronize = function (queryRunner) {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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var driver, tableExist;
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return tslib_1.__generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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queryRunner = this.getQueryRunner(queryRunner);
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driver = this.connection.driver;
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return [4 /*yield*/, queryRunner.hasTable(this.queryResultCacheTable)];
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case 1:
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tableExist = _a.sent();
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if (tableExist)
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return [2 /*return*/];
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return [4 /*yield*/, queryRunner.createTable(new Table({
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name: this.queryResultCacheTable,
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columns: [
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{
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name: "id",
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isPrimary: true,
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isNullable: false,
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type: driver.normalizeType({ type: driver.mappedDataTypes.cacheId }),
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generationStrategy: "increment",
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isGenerated: true
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},
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{
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name: "identifier",
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type: driver.normalizeType({ type: driver.mappedDataTypes.cacheIdentifier }),
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isNullable: true
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},
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{
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name: "time",
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type: driver.normalizeType({ type: driver.mappedDataTypes.cacheTime }),
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isPrimary: false,
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isNullable: false
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},
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{
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name: "duration",
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type: driver.normalizeType({ type: driver.mappedDataTypes.cacheDuration }),
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isPrimary: false,
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isNullable: false
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},
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{
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name: "query",
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type: driver.normalizeType({ type: driver.mappedDataTypes.cacheQuery }),
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isPrimary: false,
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isNullable: false
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},
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{
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name: "result",
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type: driver.normalizeType({ type: driver.mappedDataTypes.cacheResult }),
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isNullable: false
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},
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]
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}))];
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case 2:
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_a.sent();
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return [2 /*return*/];
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}
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});
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});
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};
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/**
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* Caches given query result.
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* Returns cache result if found.
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* Returns undefined if result is not cached.
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*/
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DbQueryResultCache.prototype.getFromCache = function (options, queryRunner) {
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queryRunner = this.getQueryRunner(queryRunner);
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var qb = this.connection
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.createQueryBuilder(queryRunner)
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.select()
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.from(this.queryResultCacheTable, "cache");
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if (options.identifier) {
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return qb
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.where(qb.escape("cache") + "." + qb.escape("identifier") + " = :identifier")
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.setParameters({ identifier: this.connection.driver instanceof SqlServerDriver ? new MssqlParameter(options.identifier, "nvarchar") : options.identifier })
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.getRawOne();
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}
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else if (options.query) {
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if (this.connection.driver instanceof OracleDriver) {
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return qb
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.where("dbms_lob.compare(" + qb.escape("cache") + "." + qb.escape("query") + ", :query) = 0", { query: options.query })
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.getRawOne();
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}
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return qb
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.where(qb.escape("cache") + "." + qb.escape("query") + " = :query")
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.setParameters({ query: this.connection.driver instanceof SqlServerDriver ? new MssqlParameter(options.query, "nvarchar") : options.query })
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.getRawOne();
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}
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return Promise.resolve(undefined);
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};
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/**
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* Checks if cache is expired or not.
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*/
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DbQueryResultCache.prototype.isExpired = function (savedCache) {
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var duration = typeof savedCache.duration === "string" ? parseInt(savedCache.duration) : savedCache.duration;
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return ((typeof savedCache.time === "string" ? parseInt(savedCache.time) : savedCache.time) + duration) < new Date().getTime();
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};
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/**
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* Stores given query result in the cache.
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*/
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DbQueryResultCache.prototype.storeInCache = function (options, savedCache, queryRunner) {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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var insertedValues, qb, qb;
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return tslib_1.__generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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queryRunner = this.getQueryRunner(queryRunner);
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insertedValues = options;
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if (this.connection.driver instanceof SqlServerDriver) { // todo: bad abstraction, re-implement this part, probably better if we create an entity metadata for cache table
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insertedValues = {
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identifier: new MssqlParameter(options.identifier, "nvarchar"),
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time: new MssqlParameter(options.time, "bigint"),
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duration: new MssqlParameter(options.duration, "int"),
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query: new MssqlParameter(options.query, "nvarchar"),
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result: new MssqlParameter(options.result, "nvarchar"),
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};
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}
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if (!(savedCache && savedCache.identifier)) return [3 /*break*/, 2];
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qb = queryRunner.manager
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.createQueryBuilder()
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.update(this.queryResultCacheTable)
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.set(insertedValues);
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qb.where(qb.escape("identifier") + " = :condition", { condition: insertedValues.identifier });
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return [4 /*yield*/, qb.execute()];
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case 1:
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_a.sent();
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return [3 /*break*/, 6];
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case 2:
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if (!(savedCache && savedCache.query)) return [3 /*break*/, 4];
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qb = queryRunner.manager
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.createQueryBuilder()
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.update(this.queryResultCacheTable)
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.set(insertedValues);
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if (this.connection.driver instanceof OracleDriver) {
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qb.where("dbms_lob.compare(\"query\", :condition) = 0", { condition: insertedValues.query });
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}
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else {
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qb.where(qb.escape("query") + " = :condition", { condition: insertedValues.query });
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}
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return [4 /*yield*/, qb.execute()];
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case 3:
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_a.sent();
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return [3 /*break*/, 6];
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case 4: // otherwise insert
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return [4 /*yield*/, queryRunner.manager
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.createQueryBuilder()
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.insert()
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.into(this.queryResultCacheTable)
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.values(insertedValues)
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.execute()];
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case 5:
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_a.sent();
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_a.label = 6;
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case 6: return [2 /*return*/];
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}
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});
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});
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};
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/**
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* Clears everything stored in the cache.
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*/
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DbQueryResultCache.prototype.clear = function (queryRunner) {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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return tslib_1.__generator(this, function (_a) {
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return [2 /*return*/, this.getQueryRunner(queryRunner).clearTable(this.queryResultCacheTable)];
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});
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});
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};
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/**
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* Removes all cached results by given identifiers from cache.
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*/
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DbQueryResultCache.prototype.remove = function (identifiers, queryRunner) {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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var _this = this;
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return tslib_1.__generator(this, function (_a) {
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switch (_a.label) {
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case 0: return [4 /*yield*/, Promise.all(identifiers.map(function (identifier) {
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var qb = _this.getQueryRunner(queryRunner).manager.createQueryBuilder();
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return qb.delete()
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.from(_this.queryResultCacheTable)
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.where(qb.escape("identifier") + " = :identifier", { identifier: identifier })
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.execute();
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}))];
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case 1:
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_a.sent();
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return [2 /*return*/];
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}
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});
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});
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};
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// -------------------------------------------------------------------------
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// Protected Methods
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// -------------------------------------------------------------------------
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/**
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* Gets a query runner to work with.
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*/
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DbQueryResultCache.prototype.getQueryRunner = function (queryRunner) {
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if (queryRunner)
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return queryRunner;
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return this.connection.createQueryRunner("master");
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};
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return DbQueryResultCache;
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}());
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export { DbQueryResultCache };
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//# sourceMappingURL=DbQueryResultCache.js.map
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