ConsistentHash

Object Hierarchy:

Description:

    var ring = new ConsistentHash ();
    ring.addNode ("node-a");
    ring.addNode ("node-b");

    string? node = ring.getNode ("user:42");

Content:

Creation methods:

• public ConsistentHash ()
  Creates an empty hash ring.

Methods:

• public Result<bool,Error> addNode (string nodeId)
  Adds physical node to ring.
• public void clear ()
  Clears all nodes and virtual ring state.
• public Result<bool,Error> containsNode (string nodeId)
  Returns whether node exists.
• public HashMap<string,int> distribution (ArrayList<string> sampleKeys)
  Returns key distribution across nodes for samples.
• public Result<string?,Error> getNode (string key)
  Returns assigned node for key.
• public Result<ArrayList<string>,Error> getNodes (string key, int count)
  Returns up to count distinct nodes for replicas.
• public int nodeCount ()
  Returns physical node count.
• public double rebalanceEstimate (ArrayList<string> sampleKeys)
  Estimates remapping ratio when one node is added.
• public Result<bool,Error> removeNode (string nodeId)
  Removes physical node from ring.
• public int virtualNodeCount ()
  Returns total virtual node count.
• public Result<ConsistentHash,Error> withVirtualNodes (int replicas)
  Sets virtual node count per physical node.

Inherited Members: