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A message store for event driven architecture.

Elixir 98.78% Dockerfile 0.86% Shell 0.36%

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message_store's Issues

fix stream name to id function

When bad stream name is given, then return nil.

Upgrade eventstore dependency

Eventstore in version 1.3 load runtime configuration.

Pass settings map to message handlers instead only message_store and repo.

Data or metadata from the current message must have a higher priority than from the recorded message.

Now:

iex> Message.follow(
  %{
    type: "Test", 
    data: %{foo: 2}, 
    metadata: %{bar: 1}
  }, 
  %{
    correlation_id: "1", 
    event_id: "2", 
    data: %{}, 
    metadata: %{bar: 3}
  }, 
  [:data, :metadata]
)
%EventStore.EventData{
  causation_id: "2",
  correlation_id: "1",
  data: %{foo: 2},
  event_id: nil,
  event_type: "Test",
  metadata: %{bar: 3}
}

Expected:

iex> Message.follow(
  %{
    type: "Test", 
    data: %{foo: 2}, 
    metadata: %{bar: 1}
  }, 
  %{
    correlation_id: "1", 
    event_id: "2", 
    data: %{}, 
    metadata: %{bar: 3}
  }, 
  [:data, :metadata]
)
%EventStore.EventData{
  causation_id: "2",
  correlation_id: "1",
  data: %{foo: 2},
  event_id: nil,
  event_type: "Test",
  metadata: %{bar: 1}
}

Add recipient filter/selector in subscriber.

When is recipient in message metadata and subscriber has recipent set in settings, subsciber react only values match. Resolve problem with concurent consumers and only selected one process the message.

Fetch function must return global position.

Now function return position in selected stream, but subscriber operate above $all stream, then event_number in projection point to stream_version and in subscriber to global position. These values can't be match for message processed check.

Fetch function must be refactored to use same stream $all or use own SQL to get global postion.

Fix event data creator.

Use more generic function to convert atoms and strings to string.

Make the decoding json deserializer configurable.

Make relaxed JSON serializer/deserializer.

For better scalability and portability, the message must not contain strict types. They must not deserialize into a specific structure, but only into a map.

An error in processing the message completely stops the subscriber instead of failing it.

The supervisor does not apply at all, so the subscriber is not restarted. The benefits of Erlang will not be taken advantage of. The system looks functional, but the opposite is true.

Make the message store aware of origin streams.

For subscriptions that have an :origin_stream_name, we’ll further filter that query result based on whether or not the messages have that :origin_stream_name in their metadata.

Fix origin stream/recipient selector when subscriber has attribute set and messages has not.

GenServer {Goauld.MessageStore.EventStore.Subscriptions.Registry, {"$all", "eu:gemini:components:heartbeat:command"}} terminating
** (FunctionClauseError) no function clause matching in MessageStore.Subscriber.recipient_selector/2
    (message_store 0.4.1) lib/message_store/subscriber.ex:130: MessageStore.Subscriber.recipient_selector("eu:gemini", %EventStore.RecordedEvent{causation_id: "125c5329-63d0-529f-8d4e-6d7b7471e276", correlation_id: "125c5329-63d0-529f-8d4e-6d7b7471e276", created_at: ~U[2020-08-31 12:59:41.992250Z], data: %{addrs: ["192.168.0.14", "fe80::30d6:a08:c12b:427d"], host_name: "gemini", id: "125c5329-63d0-529f-8d4e-6d7b7471e276", location: "eu", time: "2020-08-31T12:59:41.986930"}, event_id: "c5b32b72-f541-48cb-a2a4-ed23fc679540", event_number: 1, event_type: "Register", metadata: %{}, stream_uuid: "hostRegistry:command-125c5329-63d0-529f-8d4e-6d7b7471e276", stream_version: 1})
    (message_store 0.4.1) lib/message_store/subscriber.ex:109: MessageStore.Subscriber.selector/2
    (eventstore 1.1.0) lib/event_store/subscriptions/subscription_fsm.ex:420: EventStore.Subscriptions.SubscriptionFsm.enqueue_events/2
    (eventstore 1.1.0) lib/event_store/subscriptions/subscription_fsm.ex:126: EventStore.Subscriptions.SubscriptionFsm.transition/3
    (eventstore 1.1.0) lib/event_store/subscriptions/subscription.ex:110: EventStore.Subscriptions.Subscription.handle_info/2
    (stdlib 3.13) gen_server.erl:680: :gen_server.try_dispatch/4
    (stdlib 3.13) gen_server.erl:756: :gen_server.handle_msg/6
    (stdlib 3.13) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: {:events, [%EventStore.RecordedEvent{causation_id: "125c5329-63d0-529f-8d4e-6d7b7471e276", correlation_id: "125c5329-63d0-529f-8d4e-6d7b7471e276", created_at: ~U[2020-08-31 12:59:41.992250Z], data: %{addrs: ["192.168.0.14", "fe80::30d6:a08:c12b:427d"], host_name: "gemini", id: "125c5329-63d0-529f-8d4e-6d7b7471e276", location: "eu", time: "2020-08-31T12:59:41.986930"}, event_id: "c5b32b72-f541-48cb-a2a4-ed23fc679540", event_number: 1, event_type: "Register", metadata: %{}, stream_uuid: "hostRegistry:command-125c5329-63d0-529f-8d4e-6d7b7471e276", stream_version: 1}]}
State: %EventStore.Subscriptions.Subscription{retry_interval: 60000, stream_uuid: "$all", subscription: %EventStore.Subscriptions.SubscriptionFsm{data: %EventStore.Subscriptions.SubscriptionState{buffer_size: 1, conn: Goauld.MessageStore.Postgrex, event_store: Goauld.MessageStore, last_ack: 0, last_received: 0, last_sent: 0, lock_ref: #Reference<0.955217136.1098645505.138139>, mapper: nil, max_size: 1000, partition_by: nil, partitions: %{}, processed_event_ids: #MapSet<[]>, queue_size: 0, registry: EventStore.Registration.LocalRegistry, selector: #Function<2.94935568/1 in MessageStore.Subscriber.init/1>, serializer: MessageStore.JsonSerializer, start_from: 0, stream_uuid: "$all", subscribers: %{#PID<0.517.0> => %EventStore.Subscriptions.Subscriber{buffer_size: 1, in_flight: [], last_sent: 0, partition_key: nil, pid: #PID<0.517.0>, ref: #Reference<0.955217136.1098645505.138087>}}, subscription_id: 1, subscription_name: "eu:gemini:components:heartbeat:command"}, state: :subscribed}, subscription_name: "eu:gemini:components:heartbeat:command"}

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