syntax = "proto3";

package messaging_pb;

option java_package = "seaweedfs.client";
option java_outer_classname = "MessagingProto";

//////////////////////////////////////////////////

service SeaweedMessaging {

    rpc Subscribe (SubscribeRequest) returns (stream Message) {
    }

    rpc Publish (stream PublishRequest) returns (stream PublishResponse) {
    }

    rpc ConfigureTopic (ConfigureTopicRequest) returns (ConfigureTopicResponse) {
    }

    rpc GetTopicConfiguration (GetTopicConfigurationRequest) returns (GetTopicConfigurationResponse) {
    }

}

//////////////////////////////////////////////////

message SubscribeRequest {
    string namespace = 1;
    string topic = 2;
    int32 partition = 3;
    enum StartPosition {
        LATEST = 0; // Start at the newest message
        EARLIEST = 1; // Start at the oldest message
        TIMESTAMP = 2; // Start after a specified timestamp, exclusive
    }
    StartPosition startPosition = 4; // Where to begin consuming from
    int64 timestampNs = 5; // timestamp in nano seconds
}

message Message {
    int64 timestamp = 1 [jstype = JS_STRING]; // When the message was received by the broker
    bytes key = 2; // Message key
    bytes value = 3; // Message payload
    map<string, bytes> headers = 4; // Message headers
}

message PublishRequest {
    string namespace = 1; // only needed on the initial request
    string topic = 2; // only needed on the initial request
    int32 partition = 4;
    bytes key = 5; // Message key
    bytes value = 6; // Message payload
    map<string, bytes> headers = 7; // Message headers
}

message PublishResponse {
    int32 partition_count = 1;
}

message ConfigureTopicRequest {
    string namespace = 1;
    string topic = 2;
    int32 partition_count = 3;
    string collection = 4;
}
message ConfigureTopicResponse {
}

message GetTopicConfigurationRequest {
    string namespace = 1;
    string topic = 2;
}
message GetTopicConfigurationResponse {
    int32 partitions = 3;
}