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multi singleton instance handling depending on endpoint

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This commit is contained in:
Claus-Peter Hübner 2023-02-27 20:02:41 +01:00
parent 9c7b98fa70
commit 8104bd6b4a
1 changed files with 21 additions and 12 deletions
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33
backend/src/federation/client/GraphQLGetClient.ts
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@ -1,8 +1,14 @@
import { GraphQLClient } from 'graphql-request'
import { PatchedRequestInit } from 'graphql-request/dist/types'
type ClientInstance = {
url: string
// eslint-disable-next-line no-use-before-define
client: GraphQLGetClient
}
export class GraphQLGetClient extends GraphQLClient {
private static instance: GraphQLGetClient
private static instanceArray: ClientInstance[] = []
/**
* The Singleton's constructor should always be private to prevent direct
@ -20,16 +26,19 @@ export class GraphQLGetClient extends GraphQLClient {
* just one instance of each subclass around.
*/
public static getInstance(url: string): GraphQLGetClient {
if (!GraphQLGetClient.instance) {
GraphQLGetClient.instance = new GraphQLGetClient(url, {
method: 'GET',
jsonSerializer: {
parse: JSON.parse,
stringify: JSON.stringify,
},
})
}
return GraphQLGetClient.instance
GraphQLGetClient.instanceArray.forEach(function (instance) {
if (instance.url === url) {
return instance.client
}
})
const client = new GraphQLGetClient(url, {
method: 'GET',
jsonSerializer: {
parse: JSON.parse,
stringify: JSON.stringify,
},
})
GraphQLGetClient.instanceArray.push({ url, client } as ClientInstance)
return client
}
}