public async Task <IEventHandler> LoadAsync(IEventSubscription subscription, IEventHandlerDto config)
{
switch (config.HandlerType)
{
case EventHandlerType.Rule:
CheckDependency(EventRuleRepository);
var ruleConfig = await EventRuleRepository.GetAsync(config.Id).ConfigureAwait(false);
return(new EventRule(subscription, config.Id, ruleConfig));
case EventHandlerType.Aggregate:
CheckDependency(EventAggregatorRepository);
var aggregatorConfig = await EventAggregatorRepository.GetAsync(config.Id).ConfigureAwait(false);
return(new EventAggregator(subscription, config.Id, aggregatorConfig));
case EventHandlerType.ContractQuery:
CheckDependency(ContractQueryFactory);
CheckDependency(EthApi);
var queryConfig = await ContractQueryFactory.GetAsync(subscription.SubscriberId, config.Id).ConfigureAwait(false);
return(new ContractQueryEventHandler(subscription, config.Id, EthApi, queryConfig));
case EventHandlerType.Queue:
CheckDependency(SubscriberQueueFactory);
CheckDependency(SubscriberQueueRepository);
var queueConfig = await SubscriberQueueRepository.GetAsync(subscription.SubscriberId, config.SubscriberQueueId).ConfigureAwait(false);
var queue = await SubscriberQueueFactory.GetSubscriberQueueAsync(queueConfig).ConfigureAwait(false);
return(new QueueHandler(subscription, config.Id, queue));
case EventHandlerType.GetTransaction:
CheckDependency(GetTransactionProxy);
return(new GetTransactionEventHandler(subscription, config.Id, GetTransactionProxy));
case EventHandlerType.Index:
CheckDependency(SubscriberSearchIndexFactory);
CheckDependency(SubscriberSearchIndexRepository);
var indexConfig = await SubscriberSearchIndexRepository.GetAsync(subscription.SubscriberId, config.SubscriberSearchIndexId).ConfigureAwait(false);
var searchIndex = await SubscriberSearchIndexFactory.GetSubscriberSearchIndexAsync(indexConfig).ConfigureAwait(false);
return(new SearchIndexHandler(subscription, config.Id, searchIndex));
case EventHandlerType.Store:
CheckDependency(SubscriberRepositoryFactory);
var storageConfig = await SubscriberStorageRepository.GetAsync(subscription.SubscriberId, config.SubscriberRepositoryId).ConfigureAwait(false);
var logRepository = await SubscriberRepositoryFactory.GetLogRepositoryHandlerAsync(storageConfig).ConfigureAwait(false);
return(new StorageHandler(subscription, config.Id, logRepository));
default:
throw new ArgumentException("unsupported handler type");
}
}
public async Task WebJobExample()
{
var config = TestConfiguration.LoadConfig();
string azureStorageConnectionString = config["AzureStorageConnectionString"];
string azureSearchKey = config["AzureSearchApiKey"];
var configurationContext = EventProcessingConfigMock.Create(PARTITION, out IdGenerator idGenerator);
IEventProcessingConfigurationRepository configurationRepository = configurationContext.CreateMockRepository(idGenerator);
var web3 = new Web3.Web3(TestConfiguration.BlockchainUrls.Infura.Rinkeby);
// search components
var searchService = new AzureSearchService(serviceName: AZURE_SEARCH_SERVICE_NAME, searchApiKey: azureSearchKey);
var subscriberSearchIndexFactory = new SubscriberSearchIndexFactory(async indexName =>
{
if (await searchService.IndexExistsAsync(indexName) == false)
{
//TODO: REPLACE THIS WITH Nethereum.BlockchainStore.Search.Azure.EventToGenericSearchDocMapper
await searchService.CreateIndexAsync(EventToGenericSearchDocMapper.CreateAzureIndexDefinition(indexName));
}
return(searchService.CreateIndexer <DecodedEvent, GenericSearchDocument>(
indexName, decodedEvent => EventToGenericSearchDocMapper.Map(decodedEvent, decodedEvent.State)));
});
// queue components
//AzureStorageQueueFactory
var azureQueueFactory = new AzureStorageQueueFactory(azureStorageConnectionString);
var subscriberQueueFactory = new SubscriberQueueFactory(
queueName => azureQueueFactory.GetOrCreateQueueAsync(queueName));
// subscriber repository
var repositoryFactory = new AzureTablesSubscriberRepositoryFactory(azureStorageConnectionString);
// load subscribers and event subscriptions
var eventSubscriptionFactory = new EventSubscriptionFactory(
web3, configurationRepository, subscriberQueueFactory, subscriberSearchIndexFactory, repositoryFactory);
var eventSubscriptions = await eventSubscriptionFactory.LoadAsync(PARTITION);
// progress repo (dictates which block ranges to process next)
// maintain separate progress per partition via a prefix
var storageCloudSetup = new AzureTablesRepositoryFactory(azureStorageConnectionString, prefix: $"Partition{PARTITION}");
var blockProgressRepo = storageCloudSetup.CreateBlockProgressRepository();
var logProcessor = web3.Processing.Logs.CreateProcessor(
logProcessors: eventSubscriptions, blockProgressRepository: blockProgressRepo);
// execute
try
{
var ctx = new System.Threading.CancellationTokenSource();
await logProcessor.ExecuteAsync(BLOCK_TO, ctx.Token, BLOCK_FROM);
}
finally
{
await ClearDown(configurationContext, storageCloudSetup, searchService, azureQueueFactory, repositoryFactory);
}
// save event subscription state
await configurationRepository.EventSubscriptionStates.UpsertAsync(eventSubscriptions.Select(s => s.State));
// assertions
var subscriptionState1 = configurationContext.GetEventSubscriptionState(eventSubscriptionId: 1); // interested in transfers with contract queries and aggregations
var subscriptionState2 = configurationContext.GetEventSubscriptionState(eventSubscriptionId: 2); // interested in transfers with simple aggregation
var subscriptionState3 = configurationContext.GetEventSubscriptionState(eventSubscriptionId: 3); // interested in any event for a specific address
Assert.Equal("4009000000002040652615", subscriptionState1.Values["RunningTotalForTransferValue"].ToString());
Assert.Equal((uint)19, subscriptionState2.Values["CurrentTransferCount"]);
var txForSpecificAddress = (List <string>)subscriptionState3.Values["AllTransactionHashes"];
Assert.Equal("0x362bcbc78a5cc6156e8d24d95bee6b8f53d7821083940434d2191feba477ae0e", txForSpecificAddress[0]);
Assert.Equal("0xe63e9422dedf84d0ce13f9f75ebfd86333ce917b2572925fbdd51b51caf89b77", txForSpecificAddress[1]);
var blockNumbersForSpecificAddress = (List <HexBigInteger>)subscriptionState3.Values["AllBlockNumbers"];
Assert.Equal(4063362, blockNumbersForSpecificAddress[0].Value);
Assert.Equal(4063362, blockNumbersForSpecificAddress[1].Value);
}
