Create base internal package

internal/base/base.go

@@ -0,0 +1,36 @@
+// Package base defines foundational types and constants used in asynq package.
+package base
+
+import "github.com/rs/xid"
+
+// Redis keys
+const (
+	QueuePrefix     = "asynq:queues:"         // LIST - asynq:queues:<qname>
+	DefaultQueue    = QueuePrefix + "default" // LIST
+	ScheduledQueue  = "asynq:scheduled"       // ZSET
+	RetryQueue      = "asynq:retry"           // ZSET
+	DeadQueue       = "asynq:dead"            // ZSET
+	InProgressQueue = "asynq:in_progress"     // LIST
+)
+
+// TaskMessage is the internal representation of a task with additional metadata fields.
+// Serialized data of this type gets written in redis.
+type TaskMessage struct {
+	//-------- Task fields --------
+	// Type represents the kind of task.
+	Type string
+	// Payload holds data needed to process the task.
+	Payload map[string]interface{}
+
+	//-------- Metadata fields --------
+	// ID is a unique identifier for each task
+	ID xid.ID
+	// Queue is a name this message should be enqueued to
+	Queue string
+	// Retry is the max number of retry for this task.
+	Retry int
+	// Retried is the number of times we've retried this task so far
+	Retried int
+	// ErrorMsg holds the error message from the last failure
+	ErrorMsg string
+}