Examples of HelixManager

com.linkedin.helix.HelixManager

First class Object any process will interact with
General flow

 manager = HelixManagerFactory.getManagerFor(); ROLE can be participant, spectator or a controller
 manager.connect(); manager.addSOMEListener(); manager.start() After start is invoked the subsequent interactions will be via listener onChange callbacks There will be 3 scenarios for onChange callback, which can be determined using NotificationContext.type INIT -> will be invoked the first time the listener is added CALLBACK -> will be invoked due to datachange in the property value FINALIZE -> will be invoked when listener is removed or session expires manager.disconnect()

Default implementations available @see HelixStateMachineEngine for participant @see RoutingTableProvider for spectator @see GenericHelixController for controller @author kgopalak

org.apache.helix.HelixManager

First class Object any process will interact with
General flow

 manager = HelixManagerFactory.getManagerFor(); ROLE can be participant, spectator or a controller
 manager.connect(); manager.addSOMEListener(); manager.start() After start is invoked the subsequent interactions will be via listener onChange callbacks There will be 3 scenarios for onChange callback, which can be determined using NotificationContext.type INIT -> will be invoked the first time the listener is added CALLBACK -> will be invoked due to datachange in the property value FINALIZE -> will be invoked when listener is removed or session expires manager.disconnect()

Default implementations available @see HelixStateMachineEngine for participant @see RoutingTableProvider for spectator @see GenericHelixController for controller

      _alertValue = value;
    }
    @Override
    public void doTransition(Message message, NotificationContext context)
    {
      HelixManager manager = context.getManager();
      HelixDataAccessor accessor = manager.getHelixDataAccessor();
      String fromState = message.getFromState();
      String toState = message.getToState();
      String instance = message.getTgtName();
      String partition = message.getPartitionName();

  public class WildcardAlertTransition extends MockTransition
  {
    @Override
    public void doTransition(Message message, NotificationContext context)
    {
      HelixManager manager = context.getManager();
      HelixDataAccessor accessor = manager.getHelixDataAccessor();
      String fromState = message.getFromState();
      String toState = message.getToState();
      String instance = message.getTgtName();
      String partition = message.getPartitionName();

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of HelixManager

Examples of org.apache.helix.HelixManager

Examples of org.apache.helix.HelixManager