syntax = "proto3";

package shepard;

service sheepmq {
	// Add the given items to the queue
	rpc AddItem(stream Item) returns (stream Response) {}

	// Get the given items per the info provided
	rpc GetItem(GetInfo) returns (stream Item) {}

	// Delete the given items if possible
	rpc DelItem(DelInfo) returns (Response) {}

	// Error the given items if possible
	rpc ErrItem(ErrInfo) returns (Response) {}
}

message Response {
	// whether or not the operation was successful
	bool success = 1;

	// the amount of items affected
	uint64 count = 2;

	// error message on failure
	string msg = 3;
}

message Item {
	// the id for this item
	uint64 id = 1;

	// the arbitrary data for this item
	bytes data = 2;

	// the queue for this item
	string queue = 3;

	// error queue to cycle items to
	string errorQueue = 4;

	// error queue TTL in nanoseconds
	sfixed64 errorTTL = 5;

	// the Unix time (in seconds) in which this item was created
	sfixed64 ctime = 6;

	// the Unix time (in seconds) in which this item was errored last
	sfixed64 etime = 7;

	// the amount of times this item was errored
	uint32 ecount = 8;

	// arbitrary statistical sizes to record for this item
	map<string, int64> stats = 9;

	// future proof?
	reserved 10 to 15;
}

message GetInfo {
	string queue = 1;

	// the amount of items to try and pull
	uint64 count = 2;

	TimeLease timeoutLease = 3;

	PidLease pidLease = 4;

	HeartbeatLease heartLease = 5;

	// future proof?
	reserved 6 to 10;
}

message TimeLease {
	// TTL in nanoseconds to hold the lease
	sfixed64 ttl = 1;
}

message PidLease {
	uint32 pid = 1;
}

message HeartbeatLease {
	string id = 1;
	sfixed64 ttl = 2;
}

message DelInfo {
	string queue = 1;

	repeated uint64 ids = 2;

	// future proof?
	reserved 3 to 10;
}

message ErrInfo {
	string queue = 1;

	repeated uint64 ids = 2;

	// future proof?
	reserved 3 to 10;
}