Nats stream output #49
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Actionable comments posted: 7
🧹 Outside diff range and nitpick comments (8)
src/Argon.Api/Grains.Interfaces/ITestGrain.cs (2)
Line range hint
1-35: Consider removing or documenting the DEBUG directiveThe entire interface is wrapped in a
#if DEBUGdirective. This suggests the code might only be available in debug builds, which could cause issues in production environments.Consider either:
- Removing the DEBUG directive if this code should be available in all builds
- Adding documentation explaining why this code should only be available in debug builds
- Creating separate debug/release implementations if different behavior is needed
Line range hint
3-9: Consider consolidating serialization frameworksThe
SomeInputrecord uses multiple serialization frameworks (DataContract, MemoryPack, MessagePack, Orleans). While this provides flexibility, it increases maintenance overhead and potential for serialization mismatches.Consider documenting which serialization framework is used in which scenario, or consolidate to fewer frameworks if possible.
src/Argon.Api/Grains/TestGrain.cs (2)
Line range hint
42-42: Add explanation to Obsolete attributeThe Obsolete attribute should include a message explaining why the method is obsolete and what alternatives should be used.
- [Obsolete("Obsolete")] + [Obsolete("This method will be removed in the next major version. Use ProduceAsync instead.")]
Line range hint
80-85: Add error handling and proper cleanup to stream subscriptionThe stream type change is correct, but the implementation needs improvements:
public class StreamConsumerGrain(ILogger<StreamConsumerGrain> logger) : Grain, IStreamConsumerGrain { + private IAsyncStream<SomeInput>? _stream; + private StreamSubscriptionHandle<SomeInput>? _subscription; + public async Task Consume() { - var guid = Guid.Parse("d97e7fb1-e2f6-4803-b66c-965bc5d1d099"); + var streamId = StreamId.Create(IArgonEvent.Namespace, this.GetPrimaryKey()); var streamProvider = this.GetStreamProvider(IArgonEvent.ProviderId); - var streamId = StreamId.Create(IArgonEvent.Namespace, guid); - var stream = streamProvider.GetStream<SomeInput>(streamId); - await stream.SubscribeAsync((data, token) => + _stream = streamProvider.GetStream<SomeInput>(streamId); + _subscription = await _stream.SubscribeAsync(OnNextAsync); + } + + private Task OnNextAsync(SomeInput data, StreamSequenceToken? token) + { + try { logger.LogCritical(data.ToString()); return Task.CompletedTask; - }); + } + catch (Exception ex) + { + logger.LogError(ex, "Error processing stream message: {Data}", data); + return Task.CompletedTask; + } } + + public override async Task OnDeactivateAsync(DeactivationReason reason, CancellationToken token) + { + if (_subscription is not null) + { + await _subscription.UnsubscribeAsync(); + } + await base.OnDeactivateAsync(reason, token); + } }Improvements:
- Use grain's primary key instead of hardcoded GUID
- Store stream and subscription references
- Add error handling to message processing
- Add cleanup in OnDeactivateAsync
- Move message handling to a separate method for better organization
src/AppHost/Program.cs (3)
17-17: Consider adding health checks and resource limits for KeyDBWhile the persistent lifetime is appropriate for a cache service, consider enhancing the configuration for production readiness:
-var cache = builder.AddRedis("cache", 6379).WithImage("eqalpha/keydb").WithDataVolume().WithLifetime(ContainerLifetime.Persistent); +var cache = builder.AddRedis("cache", 6379) + .WithImage("eqalpha/keydb") + .WithDataVolume() + .WithLifetime(ContainerLifetime.Persistent) + .WithEnvironment("MAXMEMORY", "2gb") + .WithEnvironment("MAXMEMORY_POLICY", "allkeys-lru") + .WithHealthCheck("/health");
18-18: Enable NATS monitoring and verify JetStream persistenceWhile the configuration includes JetStream and persistence, consider adding monitoring capabilities:
-var nats = builder.AddNats("nats", 4222).WithDataVolume().WithJetStream().WithLifetime(ContainerLifetime.Persistent); +var nats = builder.AddNats("nats", 4222) + .WithDataVolume() + .WithJetStream() + .WithLifetime(ContainerLifetime.Persistent) + .WithEndpoint(8222, 8222, "monitoring") + .WithEnvironment("JS_MAX_MEMORY_STORE", "1GB") + .WithEnvironment("JS_MAX_FILE_STORE", "10GB");
22-26: Enhance ClickHouse configuration and improve readabilityThe configuration should be more readable and include important ClickHouse settings:
-var clickhouse = builder.AddResource(clickhouseResource).WithImage("clickhouse/clickhouse-server") - .WithVolume("clickhouse-data", "/var/lib/clickhouse").WithVolume("logs", "/var/log/clickhouse-server") - .WithEnvironment("CLICKHOUSE_USER", username).WithEnvironment("CLICKHOUSE_PASSWORD", password).WithEnvironment("CLICKHOUSE_DB", username) - .WithEnvironment("CLICKHOUSE_DEFAULT_ACCESS_MANAGEMENT", "1").WithHttpEndpoint(8123, 8123) - .WithEndpoint(9000, 9000).WithLifetime(ContainerLifetime.Persistent); +var clickhouse = builder.AddResource(clickhouseResource) + .WithImage("clickhouse/clickhouse-server") + .WithVolume("clickhouse-data", "/var/lib/clickhouse") + .WithVolume("logs", "/var/log/clickhouse-server") + .WithEnvironment(new Dictionary<string, string> { + ["CLICKHOUSE_USER"] = username, + ["CLICKHOUSE_PASSWORD"] = password, + ["CLICKHOUSE_DB"] = username, + ["CLICKHOUSE_DEFAULT_ACCESS_MANAGEMENT"] = "1", + ["CLICKHOUSE_MAX_MEMORY_USAGE"] = "10000000000", // 10GB + ["CLICKHOUSE_MAX_SERVER_MEMORY_USAGE"] = "0", + ["CLICKHOUSE_MAX_CONCURRENT_QUERIES"] = "100" + }) + .WithHttpEndpoint(8123, 8123) + .WithEndpoint(9000, 9000) + .WithLifetime(ContainerLifetime.Persistent);src/Argon.Api/Features/OrleansStreamingProviders/NatsAdapterFactory.cs (1)
145-158: Optimize header construction and ensure safe token usageThe current construction of
NatsHeaderscan be optimized for clarity and safety, and there is a potential risk iftokenis null.Refactor the header initialization for improved readability and safety:
- var headers = new NatsHeaders - { - { - "streamId", streamId.ToString() - }, - { - "eventInd", token?.EventIndex.ToString() ?? "0" - }, - { - "seq", token?.SequenceNumber.ToString() ?? "0" - } - }; + var headers = new NatsHeaders + { + ["streamId"] = streamId.ToString(), + ["eventInd"] = (token?.EventIndex ?? 0).ToString(), + ["seq"] = (token?.SequenceNumber ?? 0).ToString() + };This approach simplifies the initialization and ensures that default values are correctly assigned if
tokenis null.Additionally, consider verifying that
tokenis not required to be non-null for the subsequent operations, and handle any cases where a non-nulltokenis essential.
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📒 Files selected for processing (7)
Argon.Server.sln(1 hunks)docker-compose.yaml(0 hunks)src/AppHost/Program.cs(1 hunks)src/Argon.Api/Features/OrleansStreamingProviders/NatsAdapterFactory.cs(2 hunks)src/Argon.Api/Grains.Interfaces/ITestGrain.cs(1 hunks)src/Argon.Api/Grains/TestGrain.cs(3 hunks)src/Argon.Api/appsettings.json(1 hunks)
💤 Files with no reviewable changes (1)
- docker-compose.yaml
✅ Files skipped from review due to trivial changes (1)
- Argon.Server.sln
🔇 Additional comments (6)
src/Argon.Api/Grains.Interfaces/ITestGrain.cs (1)
7-7: Verify the impact of changing property type from int to long
The type change from int to long for property a could have several implications:
- Existing persisted data may need migration
- Consumers of this interface may need updates
- Serialized messages in transit might be affected
✅ Verification successful
Type change from int to long appears safe to proceed
The change appears to have minimal impact because:
- The code is wrapped in
#if DEBUG, indicating it's only used in development - Data is stored in Redis which handles type conversions well
- All usages are contained within test/debug code:
TestGrain.csuses it for debug streaming and Redis storageTestController.csonly creates test data with small integer values (1, 12)
- No production dependencies were found using this type
The change from int to long is a safe widening conversion and the existing integer values (1, 12) will work perfectly with long.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for usages of SomeInput to identify potential impact areas
rg -l "SomeInput" --type cs
# Look for persistence implementations that might need migration
ast-grep --pattern 'class $_ : IGrainStorage {
$$$
ReadStateAsync<SomeInput>($$$) {
$$$
}
$$$
}'
Length of output: 262
Script:
#!/bin/bash
# Check the implementation and usage context
rg "SomeInput" -A 5 -B 5 src/Argon.Api/Grains/TestGrain.cs
rg "SomeInput" -A 5 -B 5 src/Argon.Api/Controllers/TestController.cs
# Check if there are any database or storage related configurations
rg "TestGrain" -A 5 -B 5 --type json
rg "TestGrain" -A 5 -B 5 --type xml
# Look for any persistence providers or storage configurations
rg "IGrainStorage|IStorageProvider" --type cs
Length of output: 4738
src/Argon.Api/appsettings.json (1)
4-4: LGTM! Standard Redis port is now used.
The change to port 6379 aligns with Redis default configuration, making it more standardized and easier to maintain.
src/Argon.Api/Grains/TestGrain.cs (2)
5-5: LGTM: Required import for EventSequenceTokenV2
55-55: Verify stream type change impact
The stream type change from long to SomeInput needs verification across the codebase.
Also applies to: 80-80
✅ Verification successful
Stream type changes are consistent across the codebase
The verification shows that all stream usages are type-safe and properly configured:
- All
GetStream<>calls use their respective specific types (SomeInput,IArgonEvent,FusionGrainEventKind,OnChannelUserChangedState) - Proper serialization is configured with MemoryPack as the primary serializer
- The
SomeInputtype is properly decorated with serialization attributes:[DataContract, MemoryPackable(GenerateType.VersionTolerant), MessagePackObject, Serializable, GenerateSerializer]
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for other stream producers/consumers to ensure consistent type usage
rg -l "GetStream<" | xargs rg "GetStream<(?!SomeInput>)"
# Search for serialization configuration that might need updates
rg -l "AddStreaming|ConfigureServices" | xargs rg "serializ|json|protobuf"
Length of output: 373
Script:
#!/bin/bash
# Search for stream producers/consumers with proper regex
rg "GetStream<.*?>" -A 2
# Search for streaming configuration
rg "AddStreaming" -A 5
# Search for serialization settings in startup/configuration files
fd -e cs -e json | xargs rg "(?i)(serializ|json|protobuf)"
Length of output: 20315
src/AppHost/Program.cs (1)
Line range hint 31-41: Overall structure and dependencies look good
The API configuration correctly references all services and includes appropriate wait dependencies. The startup order is well-defined, and environment variables are properly configured.
src/Argon.Api/Features/OrleansStreamingProviders/NatsAdapterFactory.cs (1)
112-126: Ensure proper initialization of services and logging
Review the constructor to confirm that all services are correctly initialized and that the logging configuration aligns with application standards.
Run the following script to check the initialization of services and the creation of loggers:
Ensure that the output confirms the appropriate setup of services and that no misconfigurations exist.
✅ Verification successful
Let me gather more information about the service registration and configuration to ensure everything is properly set up.
This will help us verify:
- How HashRingStreamQueueMapperOptions is configured
- How NATS is registered in the service collection
- The complete interface/implementation of INatsConnection
Let me verify one more aspect regarding the HashRingStreamQueueMapperOptions configuration.
This will help us understand:
- How HashRingStreamQueueMapperOptions is used and configured throughout the codebase
- If there are any named configurations for NATS services
Based on the gathered information, I can now provide the final response:
Service initialization and logging configuration is properly implemented
The verification shows that:
- NATS services are correctly registered using
AddNatsClientandAddNatsJetStream INatsConnectionis properly injected viaGetRequiredService- Logger factory is correctly used to create typed loggers
- Queue mapper options are retrieved using the appropriate named configuration pattern
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify that all required services and loggers are properly configured.
# Check for the existence and registration of INatsConnection
grep -r "INatsConnection" src/
# Check for the usage of ILoggerFactory and the creation of loggers
grep -r "CreateLogger" src/
# Verify that GetOptionsByName is used correctly
grep -r "GetOptionsByName" src/
Length of output: 1072
Script:
#!/bin/bash
# Check service registration and configuration
rg -A 5 "services\.Configure.*HashRingStreamQueueMapperOptions" src/
rg "AddNats" src/
rg -A 3 "INatsConnection" src/ --type cs
Length of output: 2090
Script:
#!/bin/bash
# Check for HashRingStreamQueueMapperOptions configuration
rg -B 3 -A 3 "HashRingStreamQueueMapperOptions" src/
rg -B 2 -A 2 "services\.Configure.*name.*nats" src/
Length of output: 2321
| "cache": "localhost:6379", | ||
| "rmq": "amqp://svck:Password123@localhost:5672", | ||
| "nats": "nats://localhost:4222", | ||
| "clickhouse": "http://postgres:postgres@localhost:8123" |
There was a problem hiding this comment.
💡 Codebase verification
Clickhouse credentials in appsettings.json need to be updated to match container configuration
The verification reveals that the Clickhouse credentials in appsettings.json are incorrectly using PostgreSQL credentials. The manifest.json shows that Clickhouse is properly configured to use parameterized credentials through environment variables:
"clickhouse": {
"type": "container.v0",
"connectionString": "http://{username.value}:{password.value}@{clickhouse.bindings.http.host}:{clickhouse.bindings.http.port}",
"env": {
"CLICKHOUSE_USER": "{username.value}",
"CLICKHOUSE_PASSWORD": "{password.value}",
"CLICKHOUSE_DB": "{username.value}"
}
}The connection string in appsettings.json should be updated to use the same parameterized credentials as defined in the container configuration, not the PostgreSQL credentials.
🔗 Analysis chain
Review Clickhouse connection string credentials.
The connection string uses postgres credentials which seems unusual for Clickhouse. This might be:
- A copy-paste error from the PostgreSQL connection string
- A security concern if these aren't the intended credentials
Please verify if these are the correct credentials for your Clickhouse instance.
Let me check the content of these files to better understand the Clickhouse configuration patterns.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check for potential credential leaks or misconfigurations
# Look for other instances of postgres credentials in config files
echo "Searching for other postgres credential usage..."
rg -l 'postgres.*postgres' --type json
# Look for other Clickhouse connection strings for comparison
echo "Searching for other Clickhouse connection patterns..."
rg -l 'clickhouse|:8123' --type json
Length of output: 423
Script:
#!/bin/bash
# Check the content of the found files focusing on clickhouse configurations
echo "Content of src/Argon.Api/appsettings.json:"
cat src/Argon.Api/appsettings.json
echo -e "\nContent of src/AppHost/manifest.json:"
cat src/AppHost/manifest.json
echo -e "\nContent of src/AppHost/aspirate-state.json:"
cat src/AppHost/aspirate-state.json
Length of output: 13269
| @@ -51,12 +52,13 @@ public Task Produce() | |||
| var guid = Guid.Parse("d97e7fb1-e2f6-4803-b66c-965bc5d1d099"); | |||
| var streamProvider = this.GetStreamProvider(IArgonEvent.ProviderId); | |||
| var streamId = StreamId.Create(IArgonEvent.Namespace, guid); | |||
| var stream = streamProvider.GetStream<long>(streamId); | |||
| var stream = streamProvider.GetStream<SomeInput>(streamId); | |||
There was a problem hiding this comment.
🛠️ Refactor suggestion
Stream type change looks good, but consider improving the implementation.
The change from long to SomeInput is implemented correctly, but there are several areas for improvement:
public class StreamProducerGrain : Grain, IStreamProducerGrain
{
+ private IDisposable? _timer;
+
[Obsolete("Obsolete")]
public Task Produce()
{
- var guid = Guid.Parse("d97e7fb1-e2f6-4803-b66c-965bc5d1d099");
+ var streamId = StreamId.Create(IArgonEvent.Namespace, this.GetPrimaryKey());
var streamProvider = this.GetStreamProvider(IArgonEvent.ProviderId);
- var streamId = StreamId.Create(IArgonEvent.Namespace, guid);
var stream = streamProvider.GetStream<SomeInput>(streamId);
- RegisterTimer(_ =>
+ _timer = RegisterTimer(_ =>
{
var unixEpochNow = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
var payload = new SomeInput(unixEpochNow, "test");
- return stream.OnNextAsync(payload, new EventSequenceTokenV2());
+ return stream.OnNextAsync(payload, new EventSequenceTokenV2(unixEpochNow));
}, null, TimeSpan.FromMilliseconds(1_000), TimeSpan.FromMilliseconds(1_000));
return Task.CompletedTask;
}
+
+ public override Task OnDeactivateAsync(DeactivationReason reason, CancellationToken token)
+ {
+ _timer?.Dispose();
+ return base.OnDeactivateAsync(reason, token);
+ }
}Improvements:
- Use grain's primary key instead of hardcoded GUID
- Store timer reference for proper cleanup
- Use timestamp as sequence number for better message ordering
- Add cleanup in OnDeactivateAsync
Also applies to: 60-61
|
|
||
| var cache = builder.AddRedis("cache", 6379).WithImage("eqalpha/keydb").WithDataVolume().WithLifetime(ContainerLifetime.Persistent); | ||
| var nats = builder.AddNats("nats", 4222).WithDataVolume().WithJetStream().WithLifetime(ContainerLifetime.Persistent); | ||
| var db = builder.AddPostgres("pg", port: 5432, userName: username, password: password).WithDataVolume().WithLifetime(ContainerLifetime.Persistent); |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Optimize PostgreSQL configuration for production use
Consider adding important PostgreSQL parameters for better performance and stability:
-var db = builder.AddPostgres("pg", port: 5432, userName: username, password: password).WithDataVolume().WithLifetime(ContainerLifetime.Persistent);
+var db = builder.AddPostgres("pg", port: 5432, userName: username, password: password)
+ .WithDataVolume()
+ .WithLifetime(ContainerLifetime.Persistent)
+ .WithEnvironment("POSTGRES_MAX_CONNECTIONS", "100")
+ .WithEnvironment("POSTGRES_SHARED_BUFFERS", "1GB")
+ .WithEnvironment("POSTGRES_EFFECTIVE_CACHE_SIZE", "3GB")
+ .WithEnvironment("POSTGRES_WORK_MEM", "16MB")
+ .WithEnvironment("POSTGRES_MAINTENANCE_WORK_MEM", "256MB");📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| var db = builder.AddPostgres("pg", port: 5432, userName: username, password: password).WithDataVolume().WithLifetime(ContainerLifetime.Persistent); | |
| var db = builder.AddPostgres("pg", port: 5432, userName: username, password: password) | |
| .WithDataVolume() | |
| .WithLifetime(ContainerLifetime.Persistent) | |
| .WithEnvironment("POSTGRES_MAX_CONNECTIONS", "100") | |
| .WithEnvironment("POSTGRES_SHARED_BUFFERS", "1GB") | |
| .WithEnvironment("POSTGRES_EFFECTIVE_CACHE_SIZE", "3GB") | |
| .WithEnvironment("POSTGRES_WORK_MEM", "16MB") | |
| .WithEnvironment("POSTGRES_MAINTENANCE_WORK_MEM", "256MB"); |
| Data = [data]; | ||
| SequenceToken = eventToken; | ||
| } | ||
|
|
||
| private List<object> Data { get; } | ||
| private Type dataType { get; } |
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Correct the initialization of the 'Data' property
The assignment Data = [data]; is not valid C# syntax for initializing a List<object> with a single item.
Update the code to properly initialize the list and ensure that the Data property has a corresponding setter or is initialized appropriately:
- Data = [data];
+ Data = new List<object> { data };Additionally, modify the Data property to allow initialization:
- private List<object> Data { get; }
+ private List<object> Data { get; set; }Or initialize the property inline if it's read-only:
private List<object> Data { get; } = new List<object>();Ensure consistency between property definitions and their initialization.
| public async Task<IList<IBatchContainer>> GetQueueMessagesAsync(int maxCount) => await connection.SubscribeAsync<string>(providerName) | ||
| .Select(natsMsg => natsMsg.ToBatch(serializationManager)).Select(IBatchContainer (batch) => batch).ToListAsync(); |
There was a problem hiding this comment.
Fix incorrect lambda expression syntax in 'GetQueueMessagesAsync'
The lambda expression Select(IBatchContainer (batch) => batch) uses incorrect syntax and will result in a compilation error.
Correct the syntax to properly cast each batch to IBatchContainer:
- .Select(natsMsg => natsMsg.ToBatch(serializationManager)).Select(IBatchContainer (batch) => batch).ToListAsync();
+ .Select(natsMsg => natsMsg.ToBatch(serializationManager))
+ .Select(batch => (IBatchContainer)batch)
+ .ToListAsync();This ensures that each batch is correctly cast to IBatchContainer and the method compiles successfully.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| public async Task<IList<IBatchContainer>> GetQueueMessagesAsync(int maxCount) => await connection.SubscribeAsync<string>(providerName) | |
| .Select(natsMsg => natsMsg.ToBatch(serializationManager)).Select(IBatchContainer (batch) => batch).ToListAsync(); | |
| public async Task<IList<IBatchContainer>> GetQueueMessagesAsync(int maxCount) => await connection.SubscribeAsync<string>(providerName) | |
| .Select(natsMsg => natsMsg.ToBatch(serializationManager)) | |
| .Select(batch => (IBatchContainer)batch) | |
| .ToListAsync(); |
| var sequenceToken = (EventSequenceTokenV2)SequenceToken; | ||
|
|
||
| return Task.FromResult<object>(true); | ||
| return Data.OfType<T>().Select((@event, i) => Tuple.Create<T, StreamSequenceToken?>(@event, sequenceToken.CreateSequenceTokenForEvent(i))); |
There was a problem hiding this comment.
Add null check for 'SequenceToken' before casting
Casting SequenceToken to EventSequenceTokenV2 without checking for null can result in a NullReferenceException if SequenceToken is null.
Introduce a null check before the casting operation:
- var sequenceToken = (EventSequenceTokenV2)SequenceToken;
+ if (SequenceToken is not EventSequenceTokenV2 sequenceToken)
+ {
+ // Handle the null or unexpected token case appropriately
+ throw new InvalidOperationException("SequenceToken is null or not of type EventSequenceTokenV2.");
+ }Alternatively, if a null SequenceToken is acceptable, adjust the logic accordingly to handle that scenario without throwing an exception.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| var sequenceToken = (EventSequenceTokenV2)SequenceToken; | |
| return Task.FromResult<object>(true); | |
| return Data.OfType<T>().Select((@event, i) => Tuple.Create<T, StreamSequenceToken?>(@event, sequenceToken.CreateSequenceTokenForEvent(i))); | |
| if (SequenceToken is not EventSequenceTokenV2 sequenceToken) | |
| { | |
| // Handle the null or unexpected token case appropriately | |
| throw new InvalidOperationException("SequenceToken is null or not of type EventSequenceTokenV2."); | |
| } | |
| return Data.OfType<T>().Select((@event, i) => Tuple.Create<T, StreamSequenceToken?>(@event, sequenceToken.CreateSequenceTokenForEvent(i))); |
| var data = serializationManager.Deserialize(typeof(object), msg.Data); | ||
| var stream = msg.Headers?["streamId"][0]; | ||
| var streamId = StreamId.Parse(Encoding.UTF8.GetBytes(stream)); | ||
| var eventIndex = int.TryParse(msg.Headers?["eventInd"][0], out var index); | ||
| var seq = int.TryParse(msg.Headers?["seq"][0], out var sequence); | ||
| StreamSequenceToken? token = null; | ||
| if (eventIndex && seq) token = new EventSequenceTokenV2(index, sequence); | ||
| return new ArgonEventBatch(streamId, data, data.GetType(), token); |
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Prevent NullReferenceExceptions by safely accessing message headers
Accessing msg.Headers?["streamId"][0] and similar expressions without thorough null checks may lead to NullReferenceException if the headers are missing, the keys are absent, or the header arrays are empty.
Modify the code to include comprehensive null checks to ensure safe access:
- var stream = msg.Headers?["streamId"][0];
+ var stream = msg.Headers != null && msg.Headers.TryGetValue("streamId", out var streamValues) && streamValues.Length > 0
+ ? streamValues[0]
+ : default; // Handle the absence of "streamId" as appropriate
- var eventIndex = int.TryParse(msg.Headers?["eventInd"][0], out var index);
+ var eventIndex = msg.Headers != null && msg.Headers.TryGetValue("eventInd", out var eventIndValues) && eventIndValues.Length > 0
+ && int.TryParse(eventIndValues[0], out var index);
- var seq = int.TryParse(msg.Headers?["seq"][0], out var sequence);
+ var seq = msg.Headers != null && msg.Headers.TryGetValue("seq", out var seqValues) && seqValues.Length > 0
+ && int.TryParse(seqValues[0], out var sequence);Ensure that each header is checked for existence and that the arrays contain at least one element before accessing [0].
Committable suggestion skipped: line range outside the PR's diff.
Summary by CodeRabbit
SomeInputrecord, enhancing serialization and deserialization processes.