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Implement eventing

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This commit is contained in:
Uwe Klinger
2021-05-05 08:07:48 +02:00
parent 8601bd8a46
commit 278258c436
5 changed files with 26 additions and 12 deletions
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16
suppliers/srv/mashup.js
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@@ -10,7 +10,6 @@ module.exports = async()=>{ // called by server.js
const S4bupa = await cds.connect.to('API_BUSINESS_PARTNER') //> external S4 service
const admin = await cds.connect.to('AdminService') //> local domain service
const db = await cds.connect.to('db') //> our primary database
const messaging = await cds.connect.to('messaging');
// Reflect CDS definition of the Suppliers entity
const Suppliers = db.entities["sap.capire.bookshop.Suppliers"];
@@ -41,7 +40,8 @@ module.exports = async()=>{ // called by server.js
// Subscribe to changes in the S4 origin of Suppliers data
// REVISIT: cds context is still from the UPDATE method when running in same programm, but should
// be a separate
messaging.on ('BusinessPartners/Changed', async msg => { //> would be great if we had batch events from S/4
// https://github.wdf.sap.corp/cap/matters/projects/44#card-196556
S4bupa.on ('A_BusinessPartner.Changed', async msg => { //> would be great if we had batch events from S/4
await new Promise( resolve => setTimeout( resolve, 1000 ));
const tx = cds.db.tx(msg);
let replicas = await tx.run(SELECT('ID').from (Suppliers) .where ('ID in', msg.data.businessPartners));
@@ -81,24 +81,24 @@ module.exports = async()=>{ // called by server.js
}
// TODO: remove test code
{
// one server: returns AdminSuppliers
// two servers: returns A_BusinessPartner
// one server: returns AdminService.Suppliers
// two servers: returns API_BUSINESS_PARTNER.A_BusinessPartner
const tx = S4bupa.tx({});
let result = await tx.run(SELECT('*').from ('AdminService.Suppliers') .where ('ID =', 'ACME'));
tx.commit();
console.log(result);
}
// TODO: remove test code
{
// one server: returns AdminSuppliers
// two servers: returns AdminSuppliers
// one server: returns AdminService.Suppliers
// two servers: returns AdminService.Suppliers
const tx = db.tx({});
let result = await db.run(SELECT('*').from ('AdminService.Suppliers') .where ('ID =', 'ACME'));
tx.commit();
console.log(result);
}
//process.exit(0);
}