jet.server.api.cluster
Interface ClusterService

public interface ClusterService

A interface which represent a cluster service. It provides active members info and load balancer etc.

Since:

5.0

Method Summary

Member	getAdminMember() Returns the admin member of the cluster.
Member[]	getAllMembers() Returns remote members.
java.lang.String	getClusterName() Returns the cluster name.
LoadBalancer	getDefaultLoadBalancer() Gets the default load balancer.
Member	getLocalMember() Returns the local member.
Member	getMember() Selects a member by a load balancer.
boolean	isAdminServerCrashed() Judge that if admin server is really crashed.
boolean	isTaskQueueFull(int priority) return whether cluster server task queue is full.
void	registerLocalMember() register local member in cluster's member table.
void	removeLocalMember() remove local member from cluster's member table.
void	setDefaultLoadBalancer(LoadBalancer lb) Sets default load balancer.

Method Detail

getClusterName

java.lang.String getClusterName()

Returns the cluster name.

Returns:

the cluster name.

Since:

getAllMembers

Member[] getAllMembers()
                       throws ClusterException

Returns remote members.

Returns:

remote members.

Throws:

ClusterException

Since:

getLocalMember

Member getLocalMember()

Returns the local member.

Returns:

the local member.

Since:

getAdminMember

Member getAdminMember()
                      throws ClusterException

Returns the admin member of the cluster.

Returns:

the admin member.

Throws:

ClusterException

Since:

5.0

getDefaultLoadBalancer

LoadBalancer getDefaultLoadBalancer()

Gets the default load balancer.

Returns:

the default load balancer.

Since:

setDefaultLoadBalancer

void setDefaultLoadBalancer(LoadBalancer lb)

Sets default load balancer.

Parameters:

lb - the default load balancer.

Since:

getMember

Member getMember()

Selects a member by a load balancer. Using the default load balancer if the load balancer is null.

Returns:

the member.

Since:

registerLocalMember

void registerLocalMember()
                         throws ClusterException

register local member in cluster's member table.

Throws:

ClusterException

removeLocalMember

void removeLocalMember()
                       throws ClusterException

remove local member from cluster's member table.

Throws:

ClusterException

isAdminServerCrashed

boolean isAdminServerCrashed()

Judge that if admin server is really crashed. Invoke this method when java.rmi.ConnectException or java.rmi.ConnectIOExcetpion was caught.

Returns:

true if admin server is really crashed, otherwise false.

isTaskQueueFull

boolean isTaskQueueFull(int priority)

return whether cluster server task queue is full.

Returns:

If cluster task queue is full return true, otherwise return false