<!-- AccountManager.cmp -->
<aura:component controller='CRAccountGetService' implements='flexipage:availableForRecordHome,force:hasRecordId,force:hasSobjectName' access='global'>

<!-- Attributes-->
<aura:attribute name='recordId' type='string' default='{! v.recordId }' access='global' />
<aura:attribute name='sObjectName' type='string' access='global' />

<!-- Handlers -->
<aura:handler name='init' value='{! this }' action='{! c.handleInit }' />
<aura:handler name="refreshAccountForm" event="c:CRRefreshAccountForm" action='{! c.handleRefreshAccountForm }' />

   <!-- Screen -->
    <div>
       <!-- AccountForm dynamically injected here  -->
       {! v.body }
   </div>
</aura:component>

// AccountManagerController.js
 ({
    handleInit: function(component, event, helper) {
        helper.newAccountForm(component);
    },

    // handler for child component refresh event. Destroy & recreate account form component
    handleRefreshAccountForm: function(component, event, helper) {

    // destroy existing Account form child component
    var body = component.get("v.body");
    var arrayLength = body.length;
    for (var i = 0; i < arrayLength; i++) {
        body[i].destroy();
    }
    component.set('v.body',[]);

    // create new Account form child component
    var recId = component.get('v.recordId');
    $A.createComponent("c:AccountForm", { 'recordId': recId },
                        function (newAccountForm, status, errorMsg) {
                            if (status === "SUCCESS") {
                                component.set("v.body", newAccountForm);
                            } else {
                               // show error
                            }
                        });
    },
})

<aura:handler name='init' value='{! this }' action='{! c.handleInit }' />

 <!-- Event to let parent (manager) know we need to be refreshed -->
    <aura:registerEvent name="refreshAccountForm" type="c:CRRefreshAccountForm" />
    <aura:attribute name='recordId' type='string' default='{! v.recordId }' access='global' />
    <aura:attribute name='mode' type='string' default='view' access='global' />

     <!-- Screen -->
     <lightning:messages />

    <lightning:recordForm
        aura:id='accountForm'
        objectApiName='Account'
        recordId='{! v.recordId }'
        layoutType='Full'
        columns='2'
        mode='{! v.mode }'
        onsuccess='{! c.handleSuccess }'
    />
</aura:component>

// AccountFormController.js
 ({
     // After a successful save to SF database, call external service
     handleSuccess: function(component, event, helper) {
         helper.callExternalService(component, event, helper).then (
            // promise resolved: external server accepted data. SF database unchanged
            $A.getCallback(function () {
                 helper.showToast('Account Save', 'All good', 'success', 1000);
             }),

             // promise rejected: external server rejected data and overwrote values in SF database,
             // fire event so the Manager (the parent component) refreshes the form view
             $A.getCallback(function (message) {
                 var refreshMeEvent = component.getEvent("refreshAccountForm");
                 refreshMeEvent.setParam("message", message);
                 refreshMeEvent.fire();
             })
         );
     },
 })

// AccountFormHelper.js
 ({
     callExternalService: function(component,event, helper) {
         return new Promise($A.getCallback(function(resolve, reject) {

             var externalService = component.get('c.callExternalService');
              externalService.setParams({
                  'accountId': component.get('v.recordId')
             });

             externalService.setCallback(this, function(response) {
                 if (response.getState() === "SUCCESS") {
                      var rspMsg = JSON.parse(response.getReturnValue());
                      if (rspMsg.success) {
                          resolve();
                      } else {
                         reject(rspMsg.message);
                     }
                  } else {
                     reject('Controller failure:' + response.getState());
                  }
             });
              $A.enqueueAction(externalService);
         }));
     },
 })