helix-core/src/test/resources/MaintenanceRebalancer.ComputeNewIdealState.json

[
  {
    "comment": "[Case 1] Same state - No (A, B, C) -> (A, C, B) for different hash order",
    "stateModel": "MasterSlave",
    "liveInstances": [],
    "preferenceList": [
      "lKmBBEPisM", "8PNpMU7EgT", "HOs3rOFCad"
    ],
    "currentStateMap": {
      "lKmBBEPisM" : "MASTER",
      "8PNpMU7EgT" : "SLAVE",
      "HOs3rOFCad" : "SLAVE"
    },
    "expectedPreferenceList": [
      "lKmBBEPisM", "8PNpMU7EgT", "HOs3rOFCad"
    ]
  },
  {
    "comment": "[Case 2] Same state - No (A, B, C) -> (A, C, B) for different hash order",
    "stateModel": "MasterSlave",
    "liveInstances": [],
    "preferenceList": [
      "Q3ZZuCeBpu", "QY9U91XBYo", "GMYBW20gmC"
    ],
    "currentStateMap": {
      "Q3ZZuCeBpu" : "MASTER",
      "QY9U91XBYo" : "SLAVE",
      "GMYBW20gmC" : "SLAVE"
    },
    "expectedPreferenceList": [
      "Q3ZZuCeBpu", "QY9U91XBYo", "GMYBW20gmC"
    ]
  },
  {
    "comment": "[Case 3] second becomes leader, (A, B, C) -> (B, A, C) for different hash order",
    "stateModel": "MasterSlave",
    "liveInstances": [],
    "preferenceList": [
      "lKmBBEPisM", "8PNpMU7EgT", "HOs3rOFCad"
    ],
    "currentStateMap": {
      "lKmBBEPisM" : "SLAVE",
      "8PNpMU7EgT" : "MASTER",
      "HOs3rOFCad" : "SLAVE"
    },
    "expectedPreferenceList": [
      "8PNpMU7EgT", "lKmBBEPisM", "HOs3rOFCad"
    ]
  },
  {
    "comment": "[Case 4] second becomes leader, (A, B, C) -> (B, A, C) for different hash order",
    "stateModel": "MasterSlave",
    "liveInstances": [],
    "preferenceList": [
      "Q3ZZuCeBpu", "QY9U91XBYo", "GMYBW20gmC"
    ],
    "currentStateMap": {
      "Q3ZZuCeBpu" : "SLAVE",
      "QY9U91XBYo" : "MASTER",
      "GMYBW20gmC" : "SLAVE"
    },
    "expectedPreferenceList": [
      "QY9U91XBYo", "Q3ZZuCeBpu", "GMYBW20gmC"
    ]
  },
  {
    "comment": "[Case 5] leader becomes offline, (A, B, C) -> (B, C, A) for different hash order",
    "stateModel": "MasterSlave",
    "liveInstances": [],
    "preferenceList": [
      "lKmBBEPisM", "8PNpMU7EgT", "HOs3rOFCad"
    ],
    "currentStateMap": {
      "lKmBBEPisM" : "OFFLINE",
      "8PNpMU7EgT" : "MASTER",
      "HOs3rOFCad" : "SLAVE"
    },
    "expectedPreferenceList": [
      "8PNpMU7EgT", "HOs3rOFCad", "lKmBBEPisM"
    ]
  },
  {
    "comment": "[Case 6] leader becomes offline, (A, B, C) -> (B, C, A) for different hash order",
    "stateModel": "MasterSlave",
    "liveInstances": [],
    "preferenceList": [
      "Q3ZZuCeBpu", "QY9U91XBYo", "GMYBW20gmC"
    ],
    "currentStateMap": {
      "Q3ZZuCeBpu" : "OFFLINE",
      "QY9U91XBYo" : "MASTER",
      "GMYBW20gmC" : "SLAVE"
    },
    "expectedPreferenceList": [
      "QY9U91XBYo", "GMYBW20gmC", "Q3ZZuCeBpu"
    ]
  }
]