BREAKING: Migrated the GraphDeployer to use the new API

coscine/issues#2668

src/GraphDeployer/Deployer.cs

@@ -6,6 +6,7 @@ using Coscine.GraphDeployer.Utils;
 using LibGit2Sharp;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using Polly;
 using VDS.RDF;
 using static Coscine.GraphDeployer.Utils.CommandLineOptions;
 using Configuration = Coscine.ApiClient.Core.Client.Configuration;
@@ -130,10 +131,14 @@ public class Deployer(ILogger<Deployer> logger, IOptionsMonitor<GraphDeployerCon
                         var content = VDS.RDF.Writing.StringWriter.Write(graph, rdfWriter);
                         if (!opts.DummyMode)
                         {
-                            await _adminApi.UpdateMetadataGraphAsync(
-                                graph.BaseUri.AbsoluteUri,
-                                new MetadataUpdateAdminParameters(new RdfDefinitionForManipulationDto(content, formatEnum))
-                            );
+                            // Retry the operation in case of failure up to 3 times using exponential backoff (2^retryAttempt seconds as the delay between retries)
+                            await Policy.Handle<Exception>().WaitAndRetry(3, (retryAttempt) => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt))).Execute(async () =>
+                            {
+                                await _adminApi.UpdateMetadataGraphAsync(
+                                    graph.BaseUri.AbsoluteUri,
+                                    new MetadataUpdateAdminParameters(new RdfDefinitionForManipulationDto(content, formatEnum))
+                                );
+                            });
                         }
 
                         _logger.LogInformation("Deployed {graphName} successfully.", graphId);