mirror of https://github.com/grpc/grpc-node.git
76 lines
2.2 KiB
JavaScript
76 lines
2.2 KiB
JavaScript
/*
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*
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* Copyright 2025 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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const grpc = require('@grpc/grpc-js');
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const protoLoader = require('@grpc/proto-loader');
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const parseArgs = require('minimist');
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const PROTO_PATH = __dirname + '/../protos/echo.proto';
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const packageDefinition = protoLoader.loadSync(
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PROTO_PATH,
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{keepCase: true,
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longs: String,
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enums: String,
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defaults: true,
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oneofs: true
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});
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const echoProto = grpc.loadPackageDefinition(packageDefinition).grpc.examples.echo;
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const serviceConfig = {
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loadBalancingConfig: [],
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methodConfig: [
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{
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name: [
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{
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service: 'grpc.examples.echo.Echo',
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},
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],
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retryPolicy: {
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maxAttempts: 4,
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initialBackoff: '0.01s',
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maxBackoff: '0.01s',
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backoffMultiplier: 1.0,
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retryableStatusCodes: ['UNAVAILABLE'],
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},
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},
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],
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};
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function main() {
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let argv = parseArgs(process.argv.slice(2), {
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string: 'target',
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default: {target: 'localhost:50052'}
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});
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// Set up a connection to the server with service config and create the channel.
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// However, the recommended approach is to fetch the retry configuration
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// (which is part of the service config) from the name resolver rather than
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// defining it on the client side.
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const client = new echoProto.Echo('localhost:50052', grpc.credentials.createInsecure(), { 'grpc.service_config': JSON.stringify(serviceConfig) });
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client.unaryEcho({message: 'Try and Success'}, (error, value) => {
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if (error) {
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console.log(`Unexpected error from UnaryEcho: ${error}`);
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return;
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}
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console.log(`RPC response: ${JSON.stringify(value)}`);
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});
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}
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main();
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