Package org.apache.storm.scheduler.multitenant

Class IsolatedPool

java.lang.Object
org.apache.storm.scheduler.multitenant.NodePool
org.apache.storm.scheduler.multitenant.IsolatedPool
public class IsolatedPool extends NodePool
A pool of machines that can be used to run isolated topologies.

  • Constructor Details

    • IsolatedPool

      public IsolatedPool(int maxNodes)

  • Method Details

    • addTopology

      public void addTopology(TopologyDetails td)
      Description copied from class: NodePool
      Add a topology to the pool.
      Specified by:
      addTopology in class NodePool
      Parameters:
      td - the topology to add

    • canAdd

      public boolean canAdd(TopologyDetails td)
      Description copied from class: NodePool
      Check if this topology can be added to this pool.
      Specified by:
      canAdd in class NodePool
      Parameters:
      td - the topology
      Returns:
      true if it can else false

    • scheduleAsNeeded

      public void scheduleAsNeeded(NodePool... lesserPools)
      Description copied from class: NodePool
      Reschedule any topologies as needed.
      Specified by:
      scheduleAsNeeded in class NodePool
      Parameters:
      lesserPools - pools that may be used to steal nodes from.

    • takeNodes

      public Collection<Node> takeNodes(int nodesNeeded)
      Description copied from class: NodePool
      Take up to nodesNeeded from this pool.
      Specified by:
      takeNodes in class NodePool
      Parameters:
      nodesNeeded - the number of nodes that are needed.
      Returns:
      a Collection of nodes with the removed nodes in it. This may be empty, but should not be null.

    • nodesAvailable

      public int nodesAvailable()
      Description copied from class: NodePool
      Get the number of available nodes.
      Specified by:
      nodesAvailable in class NodePool
      Returns:
      the number of nodes that are available to be taken

    • slotsAvailable

      public int slotsAvailable()
      Description copied from class: NodePool
      Get number of available slots.
      Specified by:
      slotsAvailable in class NodePool
      Returns:
      the number of slots that are available to be taken

    • takeNodesBySlots

      public Collection<Node> takeNodesBySlots(int slotsNeeded)
      Description copied from class: NodePool
      Take nodes from this pool that can fulfill possibly up to the slotsNeeded.
      Specified by:
      takeNodesBySlots in class NodePool
      Parameters:
      slotsNeeded - the number of slots that are needed.
      Returns:
      a Collection of nodes with the removed nodes in it. This may be empty, but should not be null.

    • getNodeAndSlotCountIfSlotsWereTaken

      public NodePool.NodeAndSlotCounts getNodeAndSlotCountIfSlotsWereTaken(int slotsNeeded)
      Description copied from class: NodePool
      Get the number of nodes and slots this would provide to get the slots needed.
      Specified by:
      getNodeAndSlotCountIfSlotsWereTaken in class NodePool
      Parameters:
      slotsNeeded - the number of slots needed
      Returns:
      the number of nodes and slots that would be returned.

    • toString

      public String toString()
      Overrides:
      toString in class Object