let fetching gdt sum running parallel

backend/src/graphql/resolver/BalanceResolver.ts

@@ -29,13 +29,15 @@ export class BalanceResolver {
     logger.addContext('user', user.id)
     logger.info(`balance(userId=${user.id})...`)
 
-    const gdtResolver = new GdtResolver()
-    const balanceGDT = await gdtResolver.gdtBalance(context)
+    if(!context.balanceGDT) {
+      const gdtResolver = new GdtResolver()
+      context.balanceGDT = await gdtResolver.gdtBalance(context)
+    }
 
     logger.info(`time for load gdt balance: ${new Date().getTime() - now.getTime()} ms`)
     let profilingTime = new Date()
 
-    logger.debug(`balanceGDT=${balanceGDT}`)
+    logger.debug(`balanceGDT=${context.balanceGDT}`)
 
     const lastTransaction = context.lastTransaction
       ? context.lastTransaction
@@ -55,7 +57,7 @@ export class BalanceResolver {
       logger.info(`no balance found, return Default-Balance!`)
       return new Balance({
         balance: new Decimal(0),
-        balanceGDT,
+        balanceGDT: context.balanceGDT,
         count: 0,
         linkCount: 0,
       })

backend/src/graphql/resolver/TransactionResolver.ts

@@ -49,6 +49,7 @@ import {
 import { sendTransactionsToDltConnector } from './util/sendTransactionsToDltConnector'
 import { storeForeignUser } from './util/storeForeignUser'
 import { transactionLinkSummary } from './util/transactionLinkSummary'
+import { GdtResolver } from './GdtResolver'
 
 export const executeTransaction = async (
   amount: Decimal,
@@ -229,6 +230,9 @@ export class TransactionResolver {
     logger.addContext('user', user.id)
     logger.info(`transactionList(user=${user.firstName}.${user.lastName}, ${user.emailId})`)
 
+    const gdtResolver = new GdtResolver()
+    const balanceGDTPromise = gdtResolver.gdtBalance(context)
+
     // find current balance
     const lastTransaction = await getLastTransaction(user.id)
     logger.debug(`lastTransaction=${lastTransaction}`)
@@ -442,6 +446,9 @@ export class TransactionResolver {
       } ms`,
     )
     profilingTime = new Date()
+    const balanceGDT = await balanceGDTPromise
+    context.balanceGDT = balanceGDT
+    
     // Construct Result
     return new TransactionList(await balanceResolver.balance(context), transactions)
   }

backend/src/server/context.ts

@@ -16,6 +16,7 @@ export interface Context {
   gradidoID?: string
   // hack to use less DB calls for Balance Resolver
   lastTransaction?: dbTransaction | null
+  balanceGDT?: number | null
   transactionCount?: number
   linkCount?: number
   sumHoldAvailableAmount?: Decimal