Class RetryLoadBalancingPolicy

Inheritance

object

RetryLoadBalancingPolicy

Implements

ILoadBalancingPolicy

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Cassandra

Assembly: Cassandra.dll

Syntax

public class RetryLoadBalancingPolicy : ILoadBalancingPolicy

Constructors

RetryLoadBalancingPolicy(ILoadBalancingPolicy, IReconnectionPolicy)

Declaration

public RetryLoadBalancingPolicy(ILoadBalancingPolicy loadBalancingPolicy, IReconnectionPolicy reconnectionPolicy)

Parameters

Type	Name	Description
ILoadBalancingPolicy	loadBalancingPolicy
IReconnectionPolicy	reconnectionPolicy

Fields

ReconnectionEvent

Declaration

public EventHandler<RetryLoadBalancingPolicyEventArgs> ReconnectionEvent

Field Value

Type	Description
EventHandler<RetryLoadBalancingPolicyEventArgs>

Properties

LoadBalancingPolicy

Declaration

public ILoadBalancingPolicy LoadBalancingPolicy { get; }

Property Value

Type	Description
ILoadBalancingPolicy

ReconnectionPolicy

Declaration

public IReconnectionPolicy ReconnectionPolicy { get; }

Property Value

Type	Description
IReconnectionPolicy

Methods

Distance(Host)

Returns the distance assigned by this policy to the provided host.

The distance of an host influence how much connections are kept to the node (see

HostDistance). A policy should assign a * LOCAL distance to nodes that are susceptible to be returned first by newQueryPlan and it is useless for newQueryPlan to return hosts to which it assigns an IGNORED distance.

The host distance is primarily used to prevent keeping too many connections to host in remote datacenters when the policy itself always picks host in the local datacenter first.

Declaration

public HostDistance Distance(Host host)

Parameters

Type	Name	Description
Host	host	the host of which to return the distance of.

Returns

Type	Description
HostDistance	the HostDistance to host.

Initialize(ICluster)

Initialize this load balancing policy.

Note that the driver guarantees that it will call this method exactly once per policy object and will do so before any call to another of the methods of the policy.

Declaration

public void Initialize(ICluster cluster)

Parameters

Type	Name	Description
ICluster	cluster	The information about the session instance for which the policy is created.

NewQueryPlan(string, IStatement)

Returns the hosts to use for a new query.

Each new query will call this method. The first host in the result will then be used to perform the query. In the event of a connection problem (the queried host is down or appear to be so), the next host will be used. If all hosts of the returned Iterator are down, the query will fail.

Declaration

public IEnumerable<Host> NewQueryPlan(string keyspace, IStatement query)

Parameters

Type	Name	Description
string	keyspace	Keyspace on which the query is going to be executed, it can be null.
IStatement	query	The query for which to build a plan, it can be null.

Returns

Type	Description
IEnumerable<Host>	An iterator of Host. The query is tried against the hosts returned by this iterator in order, until the query has been sent successfully to one of the host.

Implements

ILoadBalancingPolicy