bpmn-elements/dist/eventDefinitions/LinkEventDefinition.js

Executable workflow elements based on BPMN 2.0

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = LinkEventDefinition;
var _getPropertyValue = _interopRequireDefault(require("../getPropertyValue.js"));
var _shared = require("../shared.js");
var _messageHelper = require("../messageHelper.js");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
const kCompleted = Symbol.for('completed');
const kMessageQ = Symbol.for('messageQ');
const kExecuteMessage = Symbol.for('executeMessage');
function LinkEventDefinition(activity, eventDefinition) {
  const {
    id,
    broker,
    environment,
    isThrowing
  } = activity;
  const {
    type = 'LinkEventDefinition',
    behaviour
  } = eventDefinition;
  this.id = id;
  this.type = type;
  const reference = this.reference = {
    linkName: behaviour.name,
    referenceType: 'link'
  };
  this.isThrowing = isThrowing;
  this.activity = activity;
  this.broker = broker;
  this.logger = environment.Logger(type.toLowerCase());
  this[kCompleted] = false;
  if (!isThrowing) {
    const messageQueueName = `${reference.referenceType}-${(0, _shared.brokerSafeId)(id)}-${(0, _shared.brokerSafeId)(reference.linkName)}-q`;
    this[kMessageQ] = broker.assertQueue(messageQueueName, {
      autoDelete: false,
      durable: true
    });
    broker.bindQueue(messageQueueName, 'api', `*.${reference.referenceType}.#`, {
      durable: true
    });
  } else {
    broker.subscribeTmp('event', 'activity.discard', this._onDiscard.bind(this), {
      noAck: true,
      consumerTag: '_link-parent-discard'
    });
  }
}
Object.defineProperty(LinkEventDefinition.prototype, 'executionId', {
  get() {
    return this[kExecuteMessage]?.content.executionId;
  }
});
LinkEventDefinition.prototype.execute = function execute(executeMessage) {
  return this.isThrowing ? this.executeThrow(executeMessage) : this.executeCatch(executeMessage);
};
LinkEventDefinition.prototype.executeCatch = function executeCatch(executeMessage) {
  this[kExecuteMessage] = executeMessage;
  this[kCompleted] = false;
  const executeContent = executeMessage.content;
  const {
    executionId,
    parent
  } = executeContent;
  const parentExecutionId = parent.executionId;
  this[kMessageQ].consume(this._onCatchLink.bind(this), {
    noAck: true,
    consumerTag: `_api-link-${executionId}`
  });
  if (this[kCompleted]) return;
  const broker = this.broker;
  const onApiMessage = this._onApiMessage.bind(this);
  broker.subscribeTmp('api', `activity.stop.${parentExecutionId}`, onApiMessage, {
    noAck: true,
    consumerTag: `_api-parent-${executionId}`
  });
  broker.subscribeTmp('api', `activity.#.${executionId}`, onApiMessage, {
    noAck: true,
    consumerTag: `_api-${executionId}`
  });
  this._debug(`expect link ${this.reference.linkName}`);
  const waitContent = (0, _messageHelper.cloneContent)(executeContent, {
    executionId: parentExecutionId,
    link: {
      ...this.reference
    }
  });
  waitContent.parent = (0, _messageHelper.shiftParent)(parent);
  broker.publish('event', 'activity.wait', waitContent);
};
LinkEventDefinition.prototype.executeThrow = function executeThrow(executeMessage) {
  const executeContent = executeMessage.content;
  const {
    executionId,
    parent
  } = executeContent;
  const parentExecutionId = parent && parent.executionId;
  this.logger.debug(`<${executionId} (${this.activity.id})> throw link ${this.reference.linkName}`);
  const broker = this.broker;
  const linkContent = (0, _messageHelper.cloneContent)(executeContent, {
    executionId: parentExecutionId,
    message: {
      ...this.reference
    },
    state: 'throw'
  });
  linkContent.parent = (0, _messageHelper.shiftParent)(parent);
  broker.publish('event', 'activity.link', linkContent, {
    type: 'link',
    delegate: true
  });
  return broker.publish('execution', 'execute.completed', (0, _messageHelper.cloneContent)(executeContent));
};
LinkEventDefinition.prototype._onCatchLink = function onCatchLink(routingKey, message) {
  if ((0, _getPropertyValue.default)(message, 'content.message.linkName') !== this.reference.linkName) return;
  if (message.content.state === 'discard') return this._discard();
  return this._complete('caught', message.content.message);
};
LinkEventDefinition.prototype._onApiMessage = function onApiMessage(routingKey, message) {
  const messageType = message.properties.type;
  switch (messageType) {
    case 'discard':
      {
        return this._discard();
      }
    case 'stop':
      {
        this._stop();
        break;
      }
  }
};
LinkEventDefinition.prototype._complete = function complete(verb, output) {
  this[kCompleted] = true;
  this._stop();
  this._debug(`${verb} link ${this.reference.linkName}`);
  const executeContent = this[kExecuteMessage].content;
  const parent = executeContent.parent;
  const catchContent = (0, _messageHelper.cloneContent)(executeContent, {
    link: {
      ...this.reference
    },
    message: {
      ...output
    },
    executionId: parent.executionId
  });
  catchContent.parent = (0, _messageHelper.shiftParent)(parent);
  const broker = this.broker;
  broker.publish('event', 'activity.catch', catchContent, {
    type: 'catch'
  });
  return broker.publish('execution', 'execute.completed', (0, _messageHelper.cloneContent)(executeContent, {
    output,
    state: 'catch'
  }));
};
LinkEventDefinition.prototype._discard = function discard() {
  this[kCompleted] = true;
  this._stop();
  return this.broker.publish('execution', 'execute.discard', (0, _messageHelper.cloneContent)(this[kExecuteMessage].content));
};
LinkEventDefinition.prototype._stop = function stop() {
  const broker = this.broker,
    executionId = this.executionId;
  broker.cancel(`_api-link-${executionId}`);
  broker.cancel(`_api-parent-${executionId}`);
  broker.cancel(`_api-${executionId}`);
  this[kMessageQ].purge();
};
LinkEventDefinition.prototype._onDiscard = function onDiscard(_, message) {
  this.broker.publish('event', 'activity.link.discard', (0, _messageHelper.cloneContent)(message.content, {
    message: {
      ...this.reference
    },
    state: 'discard'
  }), {
    type: 'link',
    delegate: true
  });
};
LinkEventDefinition.prototype._debug = function debug(msg) {
  this.logger.debug(`<${this.executionId} (${this.activity.id})> ${msg}`);
};