Package com.tailf.ha

package com.tailf.ha

Package for setup and control of High Availability cluster nodes.

This package is used to connect to the High Availability (HA) subsystem. Configuration data can then be replicated on several nodes in a cluster.

Example: We set up three nodes in an HA cluster, one as primary and the other two as secondaries, and afterwards check their state. 

 Socket s0 = new Socket("localhost", 4565);
 Socket s1 = new Socket("localhost", 4575);
 Socket s2 = new Socket("localhost", 4585);

 Ha ha0 = new Ha(s0, "clus0");
 Ha ha1 = new Ha(s1, "clus0");
 Ha ha2 = new Ha(s2, "clus0");

 ConfHaNode primary =
     new ConfHaNode(new ConfBuf("node0"),
                    new ConfIPv4(InetAddress.getByName("localhost")));


 ha0.bePrimary(primary.getNodeId());
 ha1.beSecondary(new ConfBuf("node1"), primary, true);
 ha2.beSecondary(new ConfBuf("node2"), primary, true);

 HaStatus status0 = ha0.status();
 HaStatus status1 = ha1.status();
 HaStatus status2 = ha2.status();
  • Class
    Description
    Ha
    Main class for the HA cluster management.
    HaException
    Exception for the HA handling
    HaOrderType
    enum for the different HA cluster protocol operations Used internally by the api.
    HaStateType
    This enum describes the different states a HA node can be in.
    HaStatus
    This class represents a status for an HA node in an HA cluster.