class RoundRobin

Returns a new instance of RoundRobin

Adds this host to rotation

Parameters:

Name	Type	Details
host	Host	a host instance

Returns:

Type	Details
LoadBalancing::Policies::RoundRobin	self

See Also:

• Listener#host_up

Specifications:

RoundRobin#host_up adds the host to the rotation

policy.host_up(host)
plan = policy.plan(keyspace, statement, options)
expect(plan).to have_next
expect(plan.next).to eq(host)

Removes this host from rotation

Parameters:

Name	Type	Details
host	Host	a host instance

Returns:

Type	Details
LoadBalancing::Policies::RoundRobin	self

See Also:

• Listener#host_down

Specifications:

RoundRobin#host_down removes the host from the rotation

policy.host_up(host)
policy.host_down(host)
plan = policy.plan(keyspace, statement, options)
expect(plan).to_not have_next

Noop

Parameters:

Name	Type	Details
host	Host	a host instance

Returns:

Type	Details
LoadBalancing::Policies::RoundRobin	self

See Also:

• Listener#host_found

Noop

Parameters:

Name	Type	Details
host	Host	a host instance

Returns:

Type	Details
LoadBalancing::Policies::RoundRobin	self

See Also:

• Listener#host_lost

Returns distance to host. All hosts in rotation are considered :local, all other hosts - :ignore.

Parameters:

Name	Type	Details
host	Host	a host instance

Returns:

Type	Details
Symbol	:local for all hosts in rotation and :ignore for all other hosts.

See Also:

• LoadBalancing::Policy#distance

Returns a load balancing plan that rotates hosts by 1 each time a plan is requested.

Parameters:

Name	Type	Details
keyspace	String	current keyspace of the Session
statement	Statement	actual statement to be executed
options	Execution::Options	execution options to be used

Returns:

Type	Details
LoadBalancing::Plan	a rotated load balancing plan

See Also:

• LoadBalancing::Policy#plan