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Follow up #1670: Fix StyleCop issues and improve the code (#1711)
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* Code refactoring and improvements

* Fix unit tests for ConsulServiceDiscoveryProvider

* Add default port

* Throw NullRef exception if no client

* Fix 'should_not_get' unit test

* Add AgentService extensions

* Use current naming conventions for unit tests

* Fix code smell with methos signature

* Encapsulate warning string creation.
Create expected value from a hardcoded string in unit tests
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@raman-m
raman-m authored Oct 2, 2023
1 parent e950cf2 commit e5f31ef
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Showing 42 changed files with 252 additions and 326 deletions.
2 changes: 1 addition & 1 deletion samples/OcelotServiceDiscovery/ApiGateway/ServiceDiscovery/MyServiceDiscoveryProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ public MyServiceDiscoveryProvider(IServiceProvider serviceProvider, ServiceProvi
_downstreamRoute = downstreamRoute;
}

public Task<List<Service>> Get()
public Task<List<Service>> GetAsync()
{

// Returns a list of service(s) that match the downstream route passed to the provider
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42 changes: 20 additions & 22 deletions src/Ocelot.Provider.Consul/Consul.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,20 +14,21 @@ public class Consul : IServiceDiscoveryProvider

public Consul(ConsulRegistryConfiguration config, IOcelotLoggerFactory factory, IConsulClientFactory clientFactory)
{
_logger = factory.CreateLogger<Consul>();
_config = config;
_consul = clientFactory.Get(_config);
_logger = factory.CreateLogger<Consul>();
}

public async Task<List<Service>> Get()
public async Task<List<Service>> GetAsync()
{
var queryResult = await _consul.Health.Service(_config.KeyOfServiceInConsul, string.Empty, true);

var services = new List<Service>();

foreach (var serviceEntry in queryResult.Response)
{
if (IsValid(serviceEntry))
var service = serviceEntry.Service;
if (IsValid(service))
{
var nodes = await _consul.Catalog.Nodes();
if (nodes.Response == null)
Expand All @@ -36,14 +37,14 @@ public async Task<List<Service>> Get()
}
else
{
var serviceNode = nodes.Response.FirstOrDefault(n => n.Address == serviceEntry.Service.Address);
var serviceNode = nodes.Response.FirstOrDefault(n => n.Address == service.Address);
services.Add(BuildService(serviceEntry, serviceNode));
}
}
else
{
_logger.LogWarning(
$"Unable to use service Address: {serviceEntry.Service.Address} and Port: {serviceEntry.Service.Port} as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0");
$"Unable to use service address: '{service.Address}' and port: {service.Port} as it is invalid for the service: '{service.Service}'. Address must contain host only e.g. 'localhost', and port must be greater than 0.");
}
}

Expand All @@ -52,27 +53,24 @@ public async Task<List<Service>> Get()

private static Service BuildService(ServiceEntry serviceEntry, Node serviceNode)
{
var service = serviceEntry.Service;
return new Service(
serviceEntry.Service.Service,
new ServiceHostAndPort(serviceNode == null ? serviceEntry.Service.Address : serviceNode.Name,
serviceEntry.Service.Port),
serviceEntry.Service.ID,
GetVersionFromStrings(serviceEntry.Service.Tags),
serviceEntry.Service.Tags ?? Enumerable.Empty<string>());
service.Service,
new ServiceHostAndPort(
serviceNode == null ? service.Address : serviceNode.Name,
service.Port),
service.ID,
GetVersionFromStrings(service.Tags),
service.Tags ?? Enumerable.Empty<string>());
}

private static bool IsValid(ServiceEntry serviceEntry)
{
return !string.IsNullOrEmpty(serviceEntry.Service.Address)
&& !serviceEntry.Service.Address.Contains("http://")
&& !serviceEntry.Service.Address.Contains("https://")
&& serviceEntry.Service.Port > 0;
}
private static bool IsValid(AgentService service)
=> !string.IsNullOrEmpty(service.Address)
&& !service.Address.Contains($"{Uri.UriSchemeHttp}://")
&& !service.Address.Contains($"{Uri.UriSchemeHttps}://")
&& service.Port > 0;

private static string GetVersionFromStrings(IEnumerable<string> strings)
{
return strings
?.FirstOrDefault(x => x.StartsWith(VersionPrefix, StringComparison.Ordinal))
=> strings?.FirstOrDefault(x => x.StartsWith(VersionPrefix, StringComparison.Ordinal))
.TrimStart(VersionPrefix);
}
}
13 changes: 8 additions & 5 deletions src/Ocelot.Provider.Consul/ConsulClientFactory.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,12 +3,15 @@
public class ConsulClientFactory : IConsulClientFactory
{
public IConsulClient Get(ConsulRegistryConfiguration config)
=> new ConsulClient(c => OverrideConfig(c, config));

private static void OverrideConfig(ConsulClientConfiguration to, ConsulRegistryConfiguration from)
{
return new ConsulClient(c =>
{
c.Address = new Uri($"{config.Scheme}://{config.Host}:{config.Port}");
to.Address = new Uri($"{from.Scheme}://{from.Host}:{from.Port}");

if (!string.IsNullOrEmpty(config?.Token)) c.Token = config.Token;
});
if (!string.IsNullOrEmpty(from?.Token))
{
to.Token = from.Token;
}
}
}
27 changes: 10 additions & 17 deletions src/Ocelot.Provider.Consul/ConsulFileConfigurationRepository.cs
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Original file line number Diff line number Diff line change
@@ -1,11 +1,12 @@
using System.Text;
using Microsoft.Extensions.Options;
using Microsoft.Extensions.Options;
using Newtonsoft.Json;
using Ocelot.Cache;
using Ocelot.Configuration;
using Ocelot.Configuration.File;
using Ocelot.Configuration.Repository;
using Ocelot.Logging;
using Ocelot.Responses;
using System.Text;

namespace Ocelot.Provider.Consul;

Expand All @@ -25,37 +26,32 @@ public ConsulFileConfigurationRepository(
_logger = loggerFactory.CreateLogger<ConsulFileConfigurationRepository>();
_cache = cache;

var serviceDiscoveryProvider = fileConfiguration.Value.GlobalConfiguration.ServiceDiscoveryProvider;
_configurationKey = string.IsNullOrWhiteSpace(serviceDiscoveryProvider.ConfigurationKey)
? "InternalConfiguration"
: serviceDiscoveryProvider.ConfigurationKey;

var config = new ConsulRegistryConfiguration(serviceDiscoveryProvider.Scheme, serviceDiscoveryProvider.Host,
serviceDiscoveryProvider.Port, _configurationKey, serviceDiscoveryProvider.Token);
var provider = fileConfiguration.Value.GlobalConfiguration.ServiceDiscoveryProvider;
_configurationKey = string.IsNullOrWhiteSpace(provider.ConfigurationKey)
? nameof(InternalConfiguration)
: provider.ConfigurationKey;

var config = new ConsulRegistryConfiguration(provider.Scheme, provider.Host,
provider.Port, _configurationKey, provider.Token);
_consul = factory.Get(config);
}

public async Task<Response<FileConfiguration>> Get()
{
var config = _cache.Get(_configurationKey, _configurationKey);

if (config != null)
{
return new OkResponse<FileConfiguration>(config);
}

var queryResult = await _consul.KV.Get(_configurationKey);

if (queryResult.Response == null)
{
return new OkResponse<FileConfiguration>(null);
}

var bytes = queryResult.Response.Value;

var json = Encoding.UTF8.GetString(bytes);

var consulConfig = JsonConvert.DeserializeObject<FileConfiguration>(json);

return new OkResponse<FileConfiguration>(consulConfig);
Expand All @@ -64,16 +60,13 @@ public async Task<Response<FileConfiguration>> Get()
public async Task<Response> Set(FileConfiguration ocelotConfiguration)
{
var json = JsonConvert.SerializeObject(ocelotConfiguration, Formatting.Indented);

var bytes = Encoding.UTF8.GetBytes(json);

var kvPair = new KVPair(_configurationKey)
{
Value = bytes,
};

var result = await _consul.KV.Put(kvPair);

if (result.Response)
{
_cache.AddAndDelete(_configurationKey, ocelotConfiguration, TimeSpan.FromSeconds(3), _configurationKey);
Expand All @@ -82,6 +75,6 @@ public async Task<Response> Set(FileConfiguration ocelotConfiguration)
}

return new ErrorResponse(new UnableToSetConfigInConsulError(
$"Unable to set FileConfiguration in consul, response status code from consul was {result.StatusCode}"));
$"Unable to set {nameof(FileConfiguration)} in {nameof(Consul)}, response status code from {nameof(Consul)} was {result.StatusCode}"));
}
}
32 changes: 11 additions & 21 deletions src/Ocelot.Provider.Consul/ConsulMiddlewareConfigurationProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,9 @@ namespace Ocelot.Provider.Consul;

public static class ConsulMiddlewareConfigurationProvider
{
public static OcelotMiddlewareConfigurationDelegate Get = async builder =>
public static OcelotMiddlewareConfigurationDelegate Get { get; } = GetAsync;

private static async Task GetAsync(IApplicationBuilder builder)
{
var fileConfigRepo = builder.ApplicationServices.GetService<IFileConfigurationRepository>();
var fileConfig = builder.ApplicationServices.GetService<IOptionsMonitor<FileConfiguration>>();
Expand All @@ -22,34 +24,30 @@ public static class ConsulMiddlewareConfigurationProvider
{
await SetFileConfigInConsul(builder, fileConfigRepo, fileConfig, internalConfigCreator, internalConfigRepo);
}
};
}

private static bool UsingConsul(IFileConfigurationRepository fileConfigRepo)
{
return fileConfigRepo.GetType() == typeof(ConsulFileConfigurationRepository);
}
=> fileConfigRepo.GetType() == typeof(ConsulFileConfigurationRepository);

private static async Task SetFileConfigInConsul(IApplicationBuilder builder,
IFileConfigurationRepository fileConfigRepo, IOptionsMonitor<FileConfiguration> fileConfig,
IInternalConfigurationCreator internalConfigCreator, IInternalConfigurationRepository internalConfigRepo)
{
// get the config from consul.
// Get the config from Consul
var fileConfigFromConsul = await fileConfigRepo.Get();

if (IsError(fileConfigFromConsul))
{
ThrowToStopOcelotStarting(fileConfigFromConsul);
}
else if (ConfigNotStoredInConsul(fileConfigFromConsul))
{
//there was no config in consul set the file in config in consul
// there was no config in Consul set the file in config in Consul
await fileConfigRepo.Set(fileConfig.CurrentValue);
}
else
{
// create the internal config from consul data
// Create the internal config from Consul data
var internalConfig = await internalConfigCreator.Create(fileConfigFromConsul.Data);

if (IsError(internalConfig))
{
ThrowToStopOcelotStarting(internalConfig);
Expand All @@ -58,7 +56,6 @@ private static async Task SetFileConfigInConsul(IApplicationBuilder builder,
{
// add the internal config to the internal repo
var response = internalConfigRepo.AddOrReplace(internalConfig.Data);

if (IsError(response))
{
ThrowToStopOcelotStarting(response);
Expand All @@ -73,18 +70,11 @@ private static async Task SetFileConfigInConsul(IApplicationBuilder builder,
}

private static void ThrowToStopOcelotStarting(Response config)
{
throw new Exception(
$"Unable to start Ocelot, errors are: {string.Join(',', config.Errors.Select(x => x.ToString()))}");
}
=> throw new Exception($"Unable to start Ocelot, errors are: {string.Join(',', config.Errors.Select(x => x.ToString()))}");

private static bool IsError(Response response)
{
return response == null || response.IsError;
}
=> response == null || response.IsError;

private static bool ConfigNotStoredInConsul(Response<FileConfiguration> fileConfigFromConsul)
{
return fileConfigFromConsul.Data == null;
}
=> fileConfigFromConsul.Data == null;
}
9 changes: 3 additions & 6 deletions src/Ocelot.Provider.Consul/ConsulProviderFactory.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ namespace Ocelot.Provider.Consul;
public static class ConsulProviderFactory
{
/// <summary>
/// String constant used for provider type definition.
/// String constant used for provider type definition.
/// </summary>
public const string PollConsul = nameof(Provider.Consul.PollConsul);

Expand All @@ -32,17 +32,14 @@ private static IServiceDiscoveryProvider CreateProvider(IServiceProvider provide
{
lock (LockObject)
{
var discoveryProvider =
ServiceDiscoveryProviders.FirstOrDefault(x => x.ServiceName == route.ServiceName);
var discoveryProvider = ServiceDiscoveryProviders.FirstOrDefault(x => x.ServiceName == route.ServiceName);
if (discoveryProvider != null)
{
return discoveryProvider;
}

discoveryProvider = new PollConsul(
config.PollingInterval, route.ServiceName, factory, consulProvider);
discoveryProvider = new PollConsul(config.PollingInterval, route.ServiceName, factory, consulProvider);
ServiceDiscoveryProviders.Add(discoveryProvider);

return discoveryProvider;
}
}
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12 changes: 10 additions & 2 deletions src/Ocelot.Provider.Consul/ConsulRegistryConfiguration.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,19 @@

public class ConsulRegistryConfiguration
{
/// <summary>
/// Consul HTTP client default port.
/// <para>
/// HashiCorp Developer docs: <see href="https://developer.hashicorp.com/consul">Consul</see> | <see href="https://developer.hashicorp.com/consul/docs/install/ports">Required Ports</see>.
/// </para>
/// </summary>
public const int DefaultHttpPort = 8500;

public ConsulRegistryConfiguration(string scheme, string host, int port, string keyOfServiceInConsul, string token)
{
Host = string.IsNullOrEmpty(host) ? "localhost" : host;
Port = port > 0 ? port : 8500;
Scheme = string.IsNullOrEmpty(scheme) ? "http" : scheme;
Port = port > 0 ? port : DefaultHttpPort;
Scheme = string.IsNullOrEmpty(scheme) ? Uri.UriSchemeHttp : scheme;
KeyOfServiceInConsul = keyOfServiceInConsul;
Token = token;
}
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16 changes: 9 additions & 7 deletions src/Ocelot.Provider.Consul/OcelotBuilderExtensions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,18 +9,20 @@ public static class OcelotBuilderExtensions
{
public static IOcelotBuilder AddConsul(this IOcelotBuilder builder)
{
builder.Services.AddSingleton(ConsulProviderFactory.Get);
builder.Services.AddSingleton<IConsulClientFactory, ConsulClientFactory>();
builder.Services.RemoveAll(typeof(IFileConfigurationPollerOptions));
builder.Services.AddSingleton<IFileConfigurationPollerOptions, ConsulFileConfigurationPollerOption>();
builder.Services
.AddSingleton(ConsulProviderFactory.Get)
.AddSingleton<IConsulClientFactory, ConsulClientFactory>()
.RemoveAll(typeof(IFileConfigurationPollerOptions))
.AddSingleton<IFileConfigurationPollerOptions, ConsulFileConfigurationPollerOption>();
return builder;
}

public static IOcelotBuilder AddConfigStoredInConsul(this IOcelotBuilder builder)
{
builder.Services.AddSingleton(ConsulMiddlewareConfigurationProvider.Get);
builder.Services.AddHostedService<FileConfigurationPoller>();
builder.Services.AddSingleton<IFileConfigurationRepository, ConsulFileConfigurationRepository>();
builder.Services
.AddSingleton(ConsulMiddlewareConfigurationProvider.Get)
.AddHostedService<FileConfigurationPoller>()
.AddSingleton<IFileConfigurationRepository, ConsulFileConfigurationRepository>();
return builder;
}
}
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