Embedded Reports clarification and process flow as SAAS and normal process

Hi,

Am new to this embedded report stuff, so i need help. I have to integrate dashboard to my web app into two ways.

One is SAAS and another one is normal process. Explain brefiely below

1) SAAS: -  Here we have to embedded our dashboards to diffrent diffrent clients like store1, store2, store3 (have there own DB each and evey store) so that reports should get data from local DB and update the embedded report whenever store guy open the dashabords.(Same visual report for all the stores but data should be diffrent)

2) Normal Process:- Here we have only one DB(All stores data) and also have multiple stores like store1, store2, store3 etc.. So When store guy open the dashbaords at that time store id passed through the java service, using that store id we need fetch only respective stores data(Based on store id from java service) and update the reports for each stores. (other solution also acceptable)

Can you please help on this? How can i achive this both scenarios using power BI ?

Thanks!