Package com.yahoo.config.provision

Interface Provisioner

public interface Provisioner

Interface used by the config system to acquire hosts.

Author:

Ulf Lilleengen

Method Summary

Modifier and Type	Method	Description
void	activate(com.yahoo.transaction.NestedTransaction transaction, ApplicationId application, java.util.Collection<HostSpec> hosts)	Activates the allocation of nodes to this application captured in the hosts argument.
java.util.List<HostSpec>	prepare(ApplicationId applicationId, ClusterSpec cluster, Capacity capacity, ProvisionLogger logger)	Prepares allocation of a set of hosts with a given type, common id and the amount.
void	remove(com.yahoo.transaction.NestedTransaction transaction, ApplicationId application)	Transactionally remove this application.
void	restart(ApplicationId application, HostFilter filter)	Requests a restart of the services of the given application

Method Detail

prepare

java.util.List<HostSpec> prepare(ApplicationId applicationId,
                                 ClusterSpec cluster,
                                 Capacity capacity,
                                 ProvisionLogger logger)

Prepares allocation of a set of hosts with a given type, common id and the amount.

Parameters:

applicationId - the application requesting hosts

cluster - the specification of the cluster to allocate nodes for

capacity - the capacity requested

logger - a logger which receives messages which are returned to the requestor

Returns:

the specification of the hosts allocated

activate

void activate(com.yahoo.transaction.NestedTransaction transaction,
              ApplicationId application,
              java.util.Collection<HostSpec> hosts)

Activates the allocation of nodes to this application captured in the hosts argument.

Parameters:

transaction - Transaction with operations to commit together with any operations done within the provisioner.

application - The ApplicationId that was activated.

hosts - a set of HostSpec.

remove

void remove(com.yahoo.transaction.NestedTransaction transaction,
            ApplicationId application)

Transactionally remove this application.

Parameters:

transaction - Transaction with operations to commit together with any operations done within the provisioner.

application - the application to remove

restart

void restart(ApplicationId application,
             HostFilter filter)

Requests a restart of the services of the given application

Parameters:

application - the application to restart

filter - a filter which matches the application nodes to restart