code: package io.ray.serve.metrics;
  
  import io.ray.api.Ray;
  
  public enum RayServeMetrics {
    SERVE_HANDLE_REQUEST_COUNTER(
        "serve_handle_request_counter",
        "The number of handle.remote() calls that have been made on this handle."),
  
    SERVE_NUM_ROUTER_REQUESTS(
        "serve_num_router_requests", "The number of requests processed by the router."),
  
    SERVE_DEPLOYMENT_QUEUED_QUERIES(
        "serve_deployment_queued_queries",
        "The current number of queries to this deployment waiting to be assigned to a replica."),
  
    SERVE_DEPLOYMENT_REQUEST_COUNTER(
        "serve_deployment_request_counter",
        "The number of queries that have been processed in this replica."),
  
    SERVE_DEPLOYMENT_ERROR_COUNTER(
        "serve_deployment_error_counter",
        "The number of exceptions that have occurred in this replica."),
  
    SERVE_DEPLOYMENT_REPLICA_STARTS(
        "serve_deployment_replica_starts",
        "The number of times this replica has been restarted due to failure."),
  
    SERVE_DEPLOYMENT_PROCESSING_LATENCY_MS(
        "serve_deployment_processing_latency_ms", "The latency for queries to be processed."),
  
    SERVE_REPLICA_PROCESSING_QUERIES(
        "serve_replica_processing_queries", "The current number of queries being processed."),
    ;
  
    public static final String TAG_HANDLE = "handle";
  
    public static final String TAG_ENDPOINT = "endpoint";
  
    public static final String TAG_DEPLOYMENT = "deployment";
  
    public static final String TAG_ROUTE = "route";
  
    public static final String TAG_REPLICA = "replica";
  
    private static final boolean canBeUsed =
        Ray.isInitialized() && !Ray.getRuntimeContext().isLocalMode();
  
    private static volatile boolean enabled = true;
  
    private String name;
  
    private String description;
  
    private RayServeMetrics(String name, String description) {
      this.name = name;
      this.description = description;
    }
  
    public static void execute(Runnable runnable) {
      if (!enabled || !canBeUsed) {
        return;
      }
      runnable.run();
    }
  
    public String getName() {
      return name;
    }
  
    public String getDescription() {
      return description;
    }
  
    public static void enable() {
      enabled = true;
    }
  
    public static void disable() {
      enabled = false;
    }
  }
  