node-sagas/dist/src/saga.js

Library for handling distributed transactions in the microservices architecture

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const exceptions_1 = require("./exceptions");
var SagaStates;
(function (SagaStates) {
    SagaStates["New"] = "New";
    SagaStates["InProgress"] = "In progress";
    SagaStates["InCompensation"] = "In compensation";
    SagaStates["Complete"] = "Complete";
    SagaStates["CompensationComplete"] = "Compensation complete";
    SagaStates["CompensationError"] = "Compensation error";
})(SagaStates = exports.SagaStates || (exports.SagaStates = {}));
class Saga {
    constructor(sagaFlow) {
        this.sagaFlow = sagaFlow;
        this.state = SagaStates.New;
    }
    getState() {
        return this.state;
    }
    async execute(params) {
        this.state = SagaStates.InProgress;
        try {
            await this.sagaFlow.invoke(params);
            this.state = SagaStates.Complete;
            return params;
        }
        catch (e) {
            this.state = SagaStates.InCompensation;
            this.invokeError = e;
            await this.runCompensationFlow(params);
            throw new exceptions_1.SagaExecutionFailed(e);
        }
    }
    async runCompensationFlow(params) {
        try {
            await this.sagaFlow.compensate(params);
            this.state = SagaStates.CompensationComplete;
        }
        catch (e) {
            this.state = SagaStates.CompensationError;
            this.compensationError = e;
            throw new exceptions_1.SagaCompensationFailed(e);
        }
    }
}
exports.Saga = Saga;
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