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39 lines
1.6 KiB
Plaintext
39 lines
1.6 KiB
Plaintext
The service implements synchronous data exchange.
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Service for exchanging data with Postgres SQL database
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Data exchange is done using different methods:
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1. DB CRUD operations - direct exchange with the database
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(each table model has methods Read(), Update(), Create(), Save(), Delete(), Restore())
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2. GRPC - exchange with the database using the GRPC protocol
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(the client service that needs to exchange with the database connects to the sync_exchange server service, the latter exchanges with the database)
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3. NRPC - exchange with the database using the NRPC protocol
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(the client service that needs to exchange with the database connects to the NATS service, which sends commands to the sync_exchange server, the latter exchanges with the database)
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Before starting CRUD operations, with a direct connection to the DB, you must specify the transport through which the exchange will take place (not necessary for GRPC, NRPC) using the command:
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InitCrudTransport_DB()
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from module
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"gitlab.aescorp.ru/dsp_dev/claim/sync_service/pkg/crud_starter"
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Also, to get started, the environment variables must be filled in:
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(in ".env" file)
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1) for DB CRUD:
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DB_HOST=""
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DB_NAME=""
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DB_SCHEME=""
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DB_PORT=""
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DB_USER=""
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DB_PASSWORD=""
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2) for GRPC:
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SYNC_SERVICE_HOST=
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SYNC_SERVICE_PORT=
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3) for NRPC:
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BUS_LOCAL_HOST=
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BUS_LOCAL_PORT=
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For NRPC (and GRPC) it is advisable to connect there first and disconnect at the end
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nrpc_client.Connect()
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defer nrpc_client.CloseConnection()
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otherwise, the code will still connect there and will not disconnect at the end of the microservice. |