# Phonexia microservice communication via grpc library
This library contains defined interfaces for all microservices developed by [Phonexia](https://phonexia.com).
To use this library you will first need a running instance of any Phonexia microservice. If you don't yet have any running instance, don't hesitate to [contact our sales department](mailto:info@phonexia.com).
On [this page](https://docs.cloud.phonexia.com/docs/grpc/), you may find a gRPC API reference for all microservices.
## Example
Examples require microservice running on local machine at port 8080.
### Health check
You can invoke `health check` method of any microservice like this:
```python
import grpc
from phonexia.grpc.common.health_check_pb2 import HealthCheckRequest
from phonexia.grpc.common.health_check_pb2_grpc import HealthStub
def health_check(stub: HealthStub):
"""Create request and call the service.
Invoke Info method of the health stub.
Args:
stub (LicensingStub): Created stub for communication with service.
"""
request = HealthCheckRequest()
response = stub.Check(request)
print(response)
def main():
"""Create a gRPC channel and connect to the service."""
with grpc.insecure_channel(target="localhost:8080") as channel:
"""Create channel to the service.
The target parameter is the service address and port.
insecure channel is used for connection without TLS.
To use SSl/TLS see the grpc_secure_channel function.
"""
stub = HealthStub(channel)
health_check(stub)
if __name__ == "__main__":
main()
```
If the microservice is running, it should return: `status: SERVING`.
### Check license
Each microservice has licensed model which is required to run the service. You can fetch information about licensed models like this:
```python
import grpc
from phonexia.grpc.common.licensing_pb2 import LicensingInfoRequest
from phonexia.grpc.common.licensing_pb2_grpc import LicensingStub
def licensing_check(stub: LicensingStub):
"""Create request and call the service.
Invoke Info method of the Licensing stub.
Args:
stub (LicensingStub): Created stub for communication with service.
"""
request = LicensingInfoRequest()
response = stub.Info(request)
print(
f"The license for technology '{response.technology_name}' with model"
f" '{response.model_info.name}:{response.model_info.version}'"
f" {'is' if response.is_valid else 'was'} valid until {response.valid_until}."
)
def main():
"""Create a gRPC channel and connect to the service."""
with grpc.insecure_channel(target="localhost:8080") as channel:
"""Create channel to the service.
The target parameter is the service address and port.
insecure channel is used for connection without TLS.
To use SSl/TLS see the grpc_secure_channel function.
"""
stub = LicensingStub(channel=channel)
licensing_check(stub)
if __name__ == "__main__":
main()
```
Returned message should contain information about technology name, model name with version and time validity of license.
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"description": "\n\n# Phonexia microservice communication via grpc library\n\nThis library contains defined interfaces for all microservices developed by [Phonexia](https://phonexia.com).\n\nTo use this library you will first need a running instance of any Phonexia microservice. If you don't yet have any running instance, don't hesitate to [contact our sales department](mailto:info@phonexia.com).\n\nOn [this page](https://docs.cloud.phonexia.com/docs/grpc/), you may find a gRPC API reference for all microservices.\n\n## Example\n\nExamples require microservice running on local machine at port 8080.\n\n### Health check\n\nYou can invoke `health check` method of any microservice like this:\n\n```python\nimport grpc\n\nfrom phonexia.grpc.common.health_check_pb2 import HealthCheckRequest\nfrom phonexia.grpc.common.health_check_pb2_grpc import HealthStub\n\n\ndef health_check(stub: HealthStub):\n \"\"\"Create request and call the service.\n Invoke Info method of the health stub.\n Args:\n stub (LicensingStub): Created stub for communication with service.\n \"\"\"\n request = HealthCheckRequest()\n response = stub.Check(request)\n print(response)\n\n\ndef main():\n \"\"\"Create a gRPC channel and connect to the service.\"\"\"\n with grpc.insecure_channel(target=\"localhost:8080\") as channel:\n \"\"\"Create channel to the service.\n The target parameter is the service address and port.\n insecure channel is used for connection without TLS.\n To use SSl/TLS see the grpc_secure_channel function.\n \"\"\"\n stub = HealthStub(channel)\n health_check(stub)\n\n\nif __name__ == \"__main__\":\n main()\n\n```\n\nIf the microservice is running, it should return: `status: SERVING`.\n\n### Check license\n\nEach microservice has licensed model which is required to run the service. You can fetch information about licensed models like this:\n\n```python\nimport grpc\n\nfrom phonexia.grpc.common.licensing_pb2 import LicensingInfoRequest\nfrom phonexia.grpc.common.licensing_pb2_grpc import LicensingStub\n\n\ndef licensing_check(stub: LicensingStub):\n \"\"\"Create request and call the service.\n Invoke Info method of the Licensing stub.\n Args:\n stub (LicensingStub): Created stub for communication with service.\n \"\"\"\n request = LicensingInfoRequest()\n response = stub.Info(request)\n print(\n f\"The license for technology '{response.technology_name}' with model\"\n f\" '{response.model_info.name}:{response.model_info.version}'\"\n f\" {'is' if response.is_valid else 'was'} valid until {response.valid_until}.\"\n )\n\n\ndef main():\n \"\"\"Create a gRPC channel and connect to the service.\"\"\"\n with grpc.insecure_channel(target=\"localhost:8080\") as channel:\n \"\"\"Create channel to the service.\n The target parameter is the service address and port.\n insecure channel is used for connection without TLS.\n To use SSl/TLS see the grpc_secure_channel function.\n \"\"\"\n stub = LicensingStub(channel=channel)\n licensing_check(stub)\n\n\nif __name__ == \"__main__\":\n main()\n\n```\n\nReturned message should contain information about technology name, model name with version and time validity of license.\n",
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