NEW,

    /** A service in this state is transitioning to {@link #RUNNING}. */
    STARTING,

    /** A service in this state is operational. */
    RUNNING,

    /** A service in this state is transitioning to {@link #TERMINATED}. */
    STOPPING,

    /**

    NEW,

    /** A service in this state is transitioning to {@link #RUNNING}. */
    STARTING,

    /** A service in this state is operational. */
    RUNNING,

    /** A service in this state is transitioning to {@link #TERMINATED}. */
    STOPPING,

    /**

     * been observed yet.
     */
    void markReady() {
      monitor.enter();
      try {
        if (!transitioned) {
          // nothing has transitioned since construction, good.
          ready = true;
        } else {
          // This should be an extremely rare race condition.
          List<Service> servicesInBadStates = new ArrayList<>();

		uses   bool
	}{
		{ // transitioned object version
			xlmeta: xlMetaV2Object{
				VersionID: vID,
				DataDir:   dataDir,
				MetaSys:   transitioned,
			},
			uses: false,
		},
		{ // to be restored (requires object version to be transitioned)
			xlmeta: xlMetaV2Object{
				VersionID: vID,
				DataDir:   dataDir,
				MetaSys:   transitioned,
				MetaUser:  toBeRestored,
			},

	Disabled = "Disabled"
	// TransitionStatus status of transition
	TransitionStatus = "transition-status"
	// TransitionedObjectName name of transitioned object
	TransitionedObjectName = "transitioned-object"
	// TransitionedVersionID is version of remote object
	TransitionedVersionID = "transitioned-versionID"
	// TransitionTier name of transition storage class
	TransitionTier = "transition-tier"
)

	// latest can be true for delete marker or a version.
	IsLatest bool

	// DeleteMarker indicates if the versionId corresponds
	// to a delete marker on an object.
	DeleteMarker bool

	// Transitioned object information
	TransitionedObject TransitionedObject

	// RestoreExpires indicates date a restored object expires
	RestoreExpires time.Time

	// RestoreOngoing indicates if a restore is in progress

| `minio_cluster_ilm_transitioned_bytes`    | Total bytes transitioned to a tier.              |
| `minio_cluster_ilm_transitioned_objects`  | Total number of objects transitioned to a tier.  |
| `minio_cluster_ilm_transitioned_versions` | Total number of versions transitioned to a tier. |

## Cluster KMS Metrics

      private boolean complete(@Nullable V v, @Nullable Throwable t, int finalState) {
        boolean doCompletion = compareAndSetState(RUNNING, COMPLETING);
        if (doCompletion) {
          // If this thread successfully transitioned to COMPLETING, set the value
          // and exception and then release to the final state.
          this.value = v;
          // Don't actually construct a CancellationException until necessary.

                    stateChangeTime.set(System.currentTimeMillis());
                    halfOpenSuccesses.set(0);
                    log.info("Circuit breaker {} transitioning from OPEN to HALF_OPEN", name);
                    return State.HALF_OPEN;
                }
                // Another thread changed the state, re-evaluate
                return state.get();
            }

	IsLatest bool `msg:"is"`

	// Deleted is set when this FileInfo represents
	// a deleted marker for a versioned bucket.
	Deleted bool `msg:"del"`

	// TransitionStatus is set to Pending/Complete for transitioned
	// entries based on state of transition
	TransitionStatus string `msg:"ts"`
	// TransitionedObjName is the object name on the remote tier corresponding
	// to object (version) on the source tier.