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{ObjectLiteral} from \"../common/ObjectLiteral\";\nimport {SaveOptions} from \"../repository/SaveOptions\";\nimport {RemoveOptions} from \"../repository/RemoveOptions\";\nimport {MustBeEntityError} from \"../error/MustBeEntityError\";\nimport {SubjectExecutor} from \"./SubjectExecutor\";\nimport {CannotDetermineEntityError} from \"../error/CannotDetermineEntityError\";\nimport {QueryRunner} from \"../query-runner/QueryRunner\";\nimport {Connection} from \"../connection/Connection\";\nimport {Subject} from \"./Subject\";\nimport {OneToManySubjectBuilder} from \"./subject-builder/OneToManySubjectBuilder\";\nimport {OneToOneInverseSideSubjectBuilder} from \"./subject-builder/OneToOneInverseSideSubjectBuilder\";\nimport {ManyToManySubjectBuilder} from \"./subject-builder/ManyToManySubjectBuilder\";\nimport {SubjectDatabaseEntityLoader} from \"./SubjectDatabaseEntityLoader\";\nimport {CascadesSubjectBuilder} from \"./subject-builder/CascadesSubjectBuilder\";\nimport {OrmUtils} from \"../util/OrmUtils\";\nimport {PromiseUtils} from \"../util/PromiseUtils\";\n\n/**\n * Persists a single entity or multiple entities - saves or removes them.\n */\nexport class EntityPersistExecutor {\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(protected connection: Connection,\n protected queryRunner: QueryRunner|undefined,\n protected mode: \"save\"|\"remove\",\n protected target: Function|string|undefined,\n protected entity: ObjectLiteral|ObjectLiteral[],\n protected options?: SaveOptions & RemoveOptions) {\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Executes persistence operation ob given entity or entities.\n */\n execute(): Promise<void> {\n\n // check if entity we are going to save is valid and is an object\n if (!this.entity || !(this.entity instanceof Object))\n return Promise.reject(new MustBeEntityError(this.mode, this.entity));\n\n // we MUST call \"fake\" resolve here to make sure all properties of lazily loaded relations are resolved\n return Promise.resolve().then(async () => {\n\n // if query runner is already defined in this class, it means this entity manager was already created for a single connection\n // if its not defined we create a new query runner - single connection where we'll execute all our operations\n const queryRunner = this.queryRunner || this.connection.createQueryRunner(\"master\");\n\n // save data in the query runner - this is useful functionality to share data from outside of the world\n // with third classes - like subscribers and listener methods\n if (this.options && this.options.data)\n queryRunner.data = this.options.data;\n\n try {\n\n // collect all operate subjects\n const entities: ObjectLiteral[] = this.entity instanceof Array ? this.entity : [this.entity];\n const entitiesInChunks = this.options && this.options.chunk && this.options.chunk > 0 ? OrmUtils.chunk(entities, this.options.chunk) : [entities];\n\n // console.time(\"building subject executors...\");\n const executors = await Promise.all(entitiesInChunks.map(async entities => {\n const subjects: Subject[] = [];\n\n // create subjects for all entities we received for the persistence\n entities.forEach(entity => {\n const entityTarget = this.target ? this.target : entity.constructor;\n if (entityTarget === Object)\n throw new CannotDetermineEntityError(this.mode);\n\n subjects.push(new Subject({\n metadata: this.connection.getMetadata(entityTarget),\n entity: entity,\n canBeInserted: this.mode === \"save\",\n canBeUpdated: this.mode === \"save\",\n mustBeRemoved: this.mode === \"remove\"\n }));\n });\n\n // console.time(\"building cascades...\");\n // go through each entity with metadata and create subjects and subjects by cascades for them\n const cascadesSubjectBuilder = new CascadesSubjectBuilder(subjects);\n subjects.forEach(subject => {\n // next step we build list of subjects we will operate with\n // these subjects are subjects that we need to insert or update alongside with main persisted entity\n cascadesSubjectBuilder.build(subject);\n });\n // console.timeEnd(\"building cascades...\");\n\n // load database entities for all subjects we have\n // next step is to load database entities for all operate subjects\n // console.time(\"loading...\");\n await new SubjectDatabaseEntityLoader(queryRunner, subjects).load(this.mode);\n // console.timeEnd(\"loading...\");\n\n // console.time(\"other subjects...\");\n // build all related subjects and change maps\n if (this.mode === \"save\") {\n new OneToManySubjectBuilder(subjects).build();\n new OneToOneInverseSideSubjectBuilder(subjects).build();\n new ManyToManySubjectBuilder(subjects).build();\n } else {\n subjects.forEach(subject => {\n if (subject.mustBeRemoved) {\n new ManyToManySubjectBuilder(subjects).buildForAllRemoval(subject);\n }\n });\n }\n // console.timeEnd(\"other subjects...\");\n // console.timeEnd(\"building subjects...\");\n // console.log(\"subjects\", subjects);\n\n // create a subject executor\n return new SubjectExecutor(queryRunner, subjects, this.options);\n }));\n // console.timeEnd(\"building subject executors...\");\n\n // make sure we have at least one executable operation before we create a transaction and proceed\n // if we don't have operations it means we don't really need to update or remove something\n const executorsWithExecutableOperations = executors.filter(executor => executor.hasExecutableOperations);\n if (executorsWithExecutableOperations.length === 0)\n return;\n\n // start execute queries in a transaction\n // if transaction is already opened in this query runner then we don't touch it\n // if its not opened yet then we open it here, and once we finish - we close it\n let isTransactionStartedByUs = false;\n try {\n\n // open transaction if its not opened yet\n if (!queryRunner.isTransactionActive) {\n if (!this.options || this.options.transaction !== false) { // start transaction until it was not explicitly disabled\n isTransactionStartedByUs = true;\n await queryRunner.startTransaction();\n }\n }\n\n // execute all persistence operations for all entities we have\n // console.time(\"executing subject executors...\");\n await PromiseUtils.runInSequence(executorsWithExecutableOperations, executor => executor.execute());\n // console.timeEnd(\"executing subject executors...\");\n\n // commit transaction if it was started by us\n // console.time(\"commit\");\n if (isTransactionStartedByUs === true)\n await queryRunner.commitTransaction();\n // console.timeEnd(\"commit\");\n\n } catch (error) {\n\n // rollback transaction if it was started by us\n if (isTransactionStartedByUs) {\n try {\n await queryRunner.rollbackTransaction();\n } catch (rollbackError) { }\n }\n throw error;\n }\n\n } finally {\n\n // release query runner only if its created by us\n if (!this.queryRunner)\n await queryRunner.release();\n }\n });\n }\n\n}\n"],"sourceRoot":".."} |