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Update styles and code blocks
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JasterV
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2 changed files with 116 additions and 45 deletions
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@ -52,7 +52,7 @@ html * {
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--r-overlay-element-fg-color: 0, 0, 0;
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--r-bold-color: #ffb86c;
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--r-italic-color: #f1fa8c;
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--r-inline-code-color: #50fa7b;
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--r-inline-code-color: white;
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--r-list-bullet-color: #8be9fd;
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}
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@ -375,13 +375,6 @@ section.has-light-background h6 {
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}
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}
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:root {
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--r-bold-color: #ffb86c;
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--r-italic-color: #f1fa8c;
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--r-inline-code-color: #50fa7b;
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--r-list-bullet-color: #8be9fd;
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}
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.reveal strong,
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.reveal b {
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color: var(--r-bold-color);
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@ -1,6 +1,3 @@
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---
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---
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# Learning gRPC
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Victor Martinez
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@ -221,21 +218,48 @@ Give a short example of why it is backward and forward compatible. Mention tags.
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## Defining messages
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```protobuf
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// amend_termination/request/v1/request.proto
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syntax = "proto3";
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package amend_termination.request.v1;
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package decline_renewal.request.v1;
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message AmendTerminationRequest {
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import "google/protobuf/timestamp.proto";
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message DeclineRenewalRequest {
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string policy_id = 1;
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google.protobuf.Timestamp requested_at = 2;
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google.protobuf.Timestamp interruption_at = 3;
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optional string description = 4;
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optional string description = 3;
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oneof reason {
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CustomerTerminateReason customer = 5;
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PrimaTerminateReason prima = 6;
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CustomerDeclineRenewalReason customer = 4;
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}
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}
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enum CustomerDeclineRenewalReason {
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CUSTOMER_DECLINE_RENEWAL_REASON_UNSPECIFIED = 0;
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CUSTOMER_DECLINE_RENEWAL_REASON_COMPETITOR_OFFER = 1;
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CUSTOMER_DECLINE_RENEWAL_REASON_VEHICLE_SOLD = 2;
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CUSTOMER_DECLINE_RENEWAL_REASON_VEHICLE_NOT_PURCHASED = 3;
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CUSTOMER_DECLINE_RENEWAL_REASON_VEHICLE_DEREGISTRATION = 4;
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CUSTOMER_DECLINE_RENEWAL_REASON_NO_INSURANCE_WANTED = 5;
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CUSTOMER_DECLINE_RENEWAL_REASON_DOES_NOT_KNOW = 6;
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CUSTOMER_DECLINE_RENEWAL_REASON_WANTS_GREEN_CARD = 7;
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CUSTOMER_DECLINE_RENEWAL_REASON_INCORRECT_EFFECTIVE_DATE = 8;
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CUSTOMER_DECLINE_RENEWAL_REASON_INCORRECT_PERSONAL_DATA = 9;
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CUSTOMER_DECLINE_RENEWAL_REASON_INCORRECT_DATA_OTHER = 10;
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}
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```
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---
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## Defining messages
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```protobuf
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syntax = "proto3";
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package decline_renewal.response.v1;
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message DeclineRenewalResponse {
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string policy_id = 1;
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}
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```
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---
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@ -243,16 +267,26 @@ message AmendTerminationRequest {
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## Defining a service
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```protobuf
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// service/v1/service.proto
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syntax = "proto3";
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package service.v1;
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import "amend_termination/request/v1/request.proto";
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import "amend_termination/response/v1/response.proto";
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import "es_policy_grpc/messages/amend_termination/request/v1/request.proto";
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import "es_policy_grpc/messages/amend_termination/response/v1/response.proto";
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// Skipping other imports for the sake of the slide
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service PolicyManagementService {
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rpc AmendTermination(AmendTerminationRequest) returns (AmendTerminationResponse);
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rpc AmendTermination(amend_termination.request.v1.AmendTerminationRequest)
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returns (amend_termination.response.v1.AmendTerminationResponse);
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rpc TerminatePolicy(terminate_policy.request.v1.TerminatePolicyRequest)
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returns (terminate_policy.response.v1.TerminatePolicyResponse);
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rpc WithdrawPolicy(withdraw_policy.request.v1.WithdrawPolicyRequest)
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returns (withdraw_policy.response.v1.WithdrawPolicyResponse);
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rpc DeclineRenewal(decline_renewal.request.v1.DeclineRenewalRequest)
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returns (decline_renewal.response.v1.DeclineRenewalResponse);
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}
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```
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@ -339,19 +373,30 @@ These are only a few notable features, it provides more for sure
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```rust
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// build.rs
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let mut prost_build = prost_build::Config::new();
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prost_build.protoc_arg("--experimental_allow_proto3_optional");
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prost_build.compile_protos(
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&["<path_to_proto_messages>"],
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&[
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"proto/es_policy_grpc/messages/terminate_policy/request/v1/request.proto",
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"proto/es_policy_grpc/messages/terminate_policy/response/v1/response.proto",
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"proto/es_policy_grpc/messages/withdraw_policy/request/v1/request.proto",
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"proto/es_policy_grpc/messages/withdraw_policy/response/v1/response.proto",
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"proto/es_policy_grpc/messages/decline_renewal/request/v1/request.proto",
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"proto/es_policy_grpc/messages/decline_renewal/response/v1/response.proto",
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"proto/es_policy_grpc/messages/amend_termination/request/v1/request.proto",
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"proto/es_policy_grpc/messages/amend_termination/response/v1/response.proto",
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],
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&["proto"],
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)?;
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tonic_build::configure()
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.protoc_arg("--experimental_allow_proto3_optional")
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.compile_protos(
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&["proto/es_policy_grpc/service/v1/service.proto"],
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&["proto"],
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)?;
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)
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.unwrap();
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Ok(())
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```
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note:
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@ -364,6 +409,22 @@ First we need to talk about how do we generate code from our protobuf definition
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```rust
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// lib.rs
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pub mod messages {
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pub mod terminate_policy {
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pub mod request {
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pub mod v1 {
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include!(concat!(env!("OUT_DIR"), "/es_policy_grpc.messages.terminate_policy.request.v1.rs"));
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}
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}
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pub mod response {
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pub mod v1 {
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include!(concat!(env!("OUT_DIR"), "/es_policy_grpc.messages.terminate_policy.response.v1.rs"));
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}
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}
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}
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}
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pub mod policy_service {
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pub mod v1 {
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include!(concat!(env!("OUT_DIR"), "/es_policy_grpc.service.v1.rs"));
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@ -397,13 +458,15 @@ We get a trait generated from the Protobuf Service definition
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```rust
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// main.rs
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use tonic::Server as GrpcServer;
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use es_policy_grpc::policy_service::v1::PolicyManagementServiceServer as PolicyManagementServerStub;
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let server =
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// gRPC server implemented on top of HTTP2
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Server::builder()
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// gRPC server provided by Tonic
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GrpcServer::builder()
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.add_service(
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// Policy Management Server Stub
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PolicyManagementServiceServer::new(
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// Generated Policy Management Server Stub
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PolicyManagementServerStub::new(
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// Implementation of the service
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PolicyManagementServiceImpl::new(application)
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)
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@ -424,17 +487,29 @@ Highlight the fact that at the end of the day the gRPC server will be listening
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## Building a client
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```rust
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let mut client =
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// Auto-generated client stub
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PolicyManagementServiceClient::connect("http://[::1]:50051").await?;
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use es_policy_grpc::policy_service::v1::PolicyManagementServiceClient as PolicyManagementClientStub;
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use es_policy_grpc::messages::decline_renewal::request::v1::{
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DeclineRenewalRequest,
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DeclineRenewalReason,
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CustomerDeclineRenewalReason
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};
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use tonic::{metadata::MetadataValue, Request};
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let mut request = tonic::Request::new(GenerateContractRequest {
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// ..
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let mut client = PolicyManagementClientStub::connect("http://[::1]:50051").await?;
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let mut request = Request::new(DeclineRenewalRequest {
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policy_id: Uuid::new_v4(),
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requested_at: DateTime::now(),
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description: Some("dummy".into()),
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reason: DeclineRenewalReason::Customer(
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CustomerDeclineRenewalReason::VehicleSold
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)
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});
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let token: MetadataValue<_> = "Bearer some-auth-token".parse()?;
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request.metadata_mut.insert("authentication", token);
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request.metadata_mut.insert(http::AUTHORIZATION, token);
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let _response = client.generate_contract(request).await?;
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```
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@ -455,14 +530,17 @@ They allow you to:
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## Interceptors in practice
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```rust
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use es_policy_grpc::policy_service::v1::PolicyManagementServiceServer as PolicyManagementServerStub;
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use tonic::{metadata::MetadataValue, Request, Response, Status};
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fn check_auth(req: Request<()>) -> Result<Request<()>, Status> {
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match req.metadata().get("authorization") {
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match req.metadata().get(http::AUTHORIZATION) {
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Some(t) if is_valid(t) => Ok(req),
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_ => Err(Status::unauthenticated("No valid auth token")),
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}
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}
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let svc = PolicyManagementServiceServer::with_interceptor(
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let svc = PolicyManagementServerStub::with_interceptor(
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PolicyManagementServiceImpl::new(application),
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check_auth
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);
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