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Connector module providing infrastructure components that connect to AxonServer.
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syntax = "proto3";
package io.axoniq.axonserver.grpc;
import "google/protobuf/any.proto";
option java_multiple_files = true;

/* Describes a serialized object */
message SerializedObject {

    /* The type identifier of the serialized object. */
    string type = 1;

    /* The revision of the serialized form of the given type. */
    string revision = 2;

    /* The actual data representing the object in serialized form. */
    bytes data = 3;
}

/* The value of a MetaData entry. */
message MetaDataValue {

    /* The data of the MetaData entry, depending on the type of data it contains. */
    oneof data {

        /* The text value of the Meta Data entry. */
        string text_value = 1;

        /* The numeric value of the Meta Data entry. */
        sint64 number_value = 2;

        /* The boolean value of the Meta Data entry. */
        bool boolean_value = 3;

        /* The floating point value of the Meta Data entry. */
        double double_value = 4;

        /* The binary value of the Meta Data entry. */
        SerializedObject bytes_value = 5;
    }
}

/* An instruction for routing components when routing or processing a message. */
message ProcessingInstruction {

    /* The type of processing message. */
    ProcessingKey key = 1;

    /* The value associated with the processing key.  */
    MetaDataValue value = 2;
}

/* An enumeration of possible keys for processing instructions. */
enum ProcessingKey {

    /* key indicating that the attached value should be used for consistent routing. */
    ROUTING_KEY = 0;

    /* key indicating that the attached value indicates relative priority of this message. */
    PRIORITY = 1;

    /* key indicating that the accompanied message has a finite validity. The attached value contains the number of milliseconds. */
    TIMEOUT = 2;

    /* key indicating that the requester expects at most the given number of results from this message. Use -1 for unlimited. */
    NR_OF_RESULTS = 3;

    // do not reuse reserved number to ensure forward and backward compatibility
    reserved 4, 5, 6;
}

/* Message containing details of an error */
message ErrorMessage {

    /* A human readable message explaining the error */
    string message = 1;

    /* A description of the location (client component, server) where the error occurred */
    string location = 2;

    /* A collection of messages providing more details about root causes of the error */
    repeated string details = 3;

    /* An Error Code identifying the type of error */
    string error_code = 4;
}

/* Message used for Flow Control instruction, providing the counterpart with additional permits for sending messages */
message FlowControl {

    reserved 1;

    /* The ClientID of the component providing additional permits */
    string client_id = 2;

    /* The number of permits to provide */
    int64 permits = 3;
}

/* Message describing instruction acknowledgement */
message InstructionAck {

    /* The identifier of the instruction */
    string instruction_id = 1;

    /* Indicator whether the instruction was acknowledged successfully */
    bool success = 2;

    /* Set if instruction acknowledgement failed. */
    ErrorMessage error = 3;
}

/* Message describing the result of the execution of an instruction*/
message InstructionResult {

    /* The identifier of the instruction */
    string instruction_id = 1;

    /* Indicator whether the instruction was processed successfully */
    bool success = 2;

    /* Cause of instruction handling failure. */
    ErrorMessage error = 3;
}

/* Defines status values for a scheduled task */
enum TaskStatus {
    // Task is scheduled for execution
    SCHEDULED = 0;
    // Task execution completed successfully
    COMPLETED = 1;
    // Task execution failed with non transient exception
    FAILED = 2;
    // Task execution is in progress
    RUNNING = 3;
    // Task execution is in progress
    CANCELLED = 4;

}