"MasterSlave", true); // do rebalance
// setup message constraint
// "MESSAGE_TYPE=STATE_TRANSITION,TRANSITION=OFFLINE-SLAVE,INSTANCE=.*,CONSTRAINT_VALUE=1";
HelixAdmin admin = new ZKHelixAdmin(_gZkClient);
ConstraintItemBuilder builder = new ConstraintItemBuilder();
builder.addConstraintAttribute("MESSAGE_TYPE", "STATE_TRANSITION")
.addConstraintAttribute("INSTANCE", ".*").addConstraintAttribute("CONSTRAINT_VALUE", "1");
// Map<String, String> constraints = new TreeMap<String, String>();
// constraints.put("MESSAGE_TYPE", "STATE_TRANSITION");
// // constraints.put("TRANSITION", "OFFLINE-SLAVE");
// constraints.put("CONSTRAINT_VALUE", "1");
// constraints.put("INSTANCE", ".*");
admin.setConstraint(clusterName, ConstraintType.MESSAGE_CONSTRAINT, "constraint1",
builder.build());
final ZKHelixDataAccessor accessor =
new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
// make sure we never see more than 1 state transition message for each participant