Programmatic Administration Interface

Introduction

Section contents

Managing a gCube Hosting Node (gHN)

Managing a Running Instance (RI)

Adding / Removing a Scope to a gCube Resource (different from gHN and RI)

Registering / Unregistering a gCube Resource in a VO

Editing a gCube Resource

Banning a gCube Resource

This section describes the programming interfaces that allow to configure, manage and control nodes, services, applications and resources in a gCube infrastructure. As the gCube technology is deployed as a distributed system, there exist several APIs to manage the different areas of the system. This section is a single point of reference for all these APIs by grouping them for their logical purpose.

This section includes the following topics:

Managing a gCube Hosting Node (gHN)	Describes operations related to manage a node of the infrastructure: how to shut it down or restart it (with and without deleting its state), how to add a new scope and remove an existing scope.
Managing a Running Instance (RI)	Describes operation related to running instance management: how to add a new scope and remove an existing scope, how to deploy and undeploy them
Adding / Removing a Scope to a gCube Resource (different from gHN and RI)	Describes how to add and delete scopes to gCube Resources that are not nodes or service's instances. These operations can be performed only from a parent scope to a child scope, e.g. with them it is not possible to add a VO scope if a resource is registered only in another VO (see the next topic for this).
Registering / Unregistering a gCube Resource in a VO	Describes how to register and unregister gCube Resources in the context of a Virtual Organization.
Editing a gCube Resource	Describes how to change the representation of gCube Resources in the Information System. Depending on the resource type, different components have to be contacted for this.
Banning a gCube Resource	Describes how to instruct the Information System to exclude certain gCube resource from a given scope. This operation is available for VO-Managers and makes sense especially for nodes and running instances, when the decision to join or not a scope is partially under the control of Site Managers.

For each of them, a detailed explanation is provided about which component(s) must be contacted for doing what and which are the scope propagation rules.

Managing a gCube Hosting Node (gHN)

Shut down

Target: Shut down the node

Component(s) to contact:

• Name: gHNManager

• Where: the Running Instance on the gHN

• How to find it: query on the IS that looks for a RI of the gHNManager running on the gHN

• Operation to invoke: shutdown

• Parameters: setClean=false, setRestart=false

Restart

Target: Restart the node and preserve its state

Component(s) to contact:

• Name: gHNManager

• Where: the Running Instance on the gHN

• How to find it: query on the IS that looks for a RI of the gHNManager running on the gHN

• Operation to invoke: shutdown

• Parameters: setClean=false, setRestart=true

Restart and Clean

Target: Restart the node and clean its actual state

Component(s) to contact:

• Name: gHNManager

• Where: the Running Instance on the gHN

• How to find it: query on the IS that looks for a RI of the gHNManager running on the gHN

• Operation to invoke: shutdown

• Parameters: setClean=true, setRestart=true

Add an existing Scope

Target: Add a scope to a gHN and the related Service Map is already available on the gHN

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to add

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: addResources

• Parameters: setID=<GHN ID>, setType=GHN, setTargetScope=<new Scope>

Add a new Scope

Target: Add a scope to a gHN and the related Service Map is not available on the gHN

Component(s) to contact:

• Name: gHNManager (in case of VO scope)

• Where: the Running Instance on the gHN

• How to find it: query on the IS that looks for a RI of the gHNManager running on the gHN

• Operation to invoke: addScope

• Parameters: setScope=<new Scope>, setMap=<string serialization of the Map>

• Name: Resource Manager

• Where: the Running Instance managing the Scope to add

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: addResources

• Parameters: setID=<GHN ID>, setType=GHN, setTargetScope=<new Scope>

Remove from a Scope

Target: Remove a gHN from a scope

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to remove

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: removeResources

• Parameters: setID=<GHN ID>, setType=GHN, setTargetScope=<Scope to remove>

Managing a Running Instance (RI)

Join a Scope

Target: Join a Running Instance to a scope

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to join

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: addResources

• Parameters: setID=<RI ID>, setType=RunningInstance, setTargetScope=<Scope to Join>

Remove from a Scope

Target: Remove a Running Instance from a scope

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to remove

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: removeResources

• Parameters: setID=<RI ID>, setType=RunningInstance, setTargetScope=<Scope to remove>

• Note: if the Running Instance is joined only to this scope, it is also undeployed

Deploy

Target: Deploy a new Running Instance in a Scope

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: addResources

• Parameters: ServiceItem.setServiceClass=<Service Class>, ServiceItem.setServiceName=<Service Name>, ServiceItem.setServiceVersion=<Service Version>, ServiceItem.setGHN=<GHN ID where to deploy> (optional, suggested gHN to use), setTargetScope=<Scope to deploy in>, ServiceList.setGHN=new String[] {"GHNID1","GHNID2","GHNID3","GHNID4","GHNID5"} (optional, suggested gHNs to use)

Undeploy

Target: Force the undeployment of a Running Instance from all the scopes it is joined; for a gentler undeploy, see here

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to remove or (if this not work) try all the other scopes to which the RI is joined

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: removeResources

• Parameters: ServiceItem.setServiceClass=<Service Class of the RI>, ServiceItem.setServiceName=<Service Name of the RI>, ServiceItem.setServiceVersion=<Service Version of the RI>, setTargetScope=<Scope to undeploy from>

Adding a gCube Resource (different from gHN and RI) to a Scope

Add a gCube Resource to a Scope from the Parent Scope

Target: Add a gCube Resource to (i) a VRE scope from the parent VO or (ii) a VO scope from the infrastructure scope. If the resource is not in the parent scope, it must be registered in that scope before to be added to any scope.

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to add

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: addResources

• Parameters: setID=<Resouurce ID>, setType=<Resource Type>, setTargetScope=<Scope to add>

Add a gCube Resource from a VO to another VO

Target: Copy a gCube Resource from a VO to another VO

Component(s) to contact:

• Name: IS-Client

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: execute

• Parameters: query=GCUBEResourceQuery(with an appropriate QueryParameter condition on the resource ID), GCUBEScope=<original VO>,

• Name: IS-Publisher

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: registerGCUBEResource. Before to register the resource, the scope must be added to the local GCUBEResource object by invoking the method GCUBEResource.addScope(<new scope>)

• Parameters: GCUBEResource=<resource object obtained from the IS-Client>, GCUBEScope=<destination VO>, GCUBESecurityManager=ServiceContext.getContext()||<dummy manager>

Create a new gCube Resource

Target: Register a gCube Resource to (i) the infrastructure scope or (ii) a VO scope from scratch (e.g. the resource does not exist in any other scopes).

Component(s) to contact:

• Name: IS-Publisher

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: registerGCUBEResource. Before to register the resource, the scope must be added to the local GCUBEResource object by invoking the method GCUBEResource.addScope(<new scope>)

• Parameters: GCUBEResource=<resource profile>, GCUBEScope=<new Scope>, GCUBESecurityManager=ServiceContext.getContext()||<dummy manager>

Removing a gCube Resource (different from gHN and RI) from a Scope

Remove from a VRE Scope

Target: Remove a gCube Resource from a scope

Component(s) to contact:

• Name: Resource Manager

• Where: the Running Instance managing the Scope to remove

• How to find it: query on the IS that looks for a RI of the Resource Manager in the new scope or query on the IS that looks for the Generic Resource modeling the scope (the condition is /Resource/Profile/Body/Scope/text()=Scope Expression, then extract the service URI from /Resource/Profile/Body/Service/text()

• Operation to invoke: removeResources

• Parameters: setID=<Resouurce ID>, setType=<Resource Type>, setTargetScope=<Scope to remove>

Remove from a VO Scope

Target: remove a Resource from a VO. Before to proceed, the resource has to be removed from all the VRE scopes it belongs to.

Scope constraint: the resource joins only the VO Scope

Component(s) to contact:

• Name: IS-Publisher

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: updateGCUBEResource

• Parameters: GCUBEResource=<resource ID>, Type=<resource type>, GCUBEScope=<Scope to remove from>, GCUBESecurityManager=ServiceContext.getContext()||<dummy manager>

Note: after the removal, the resource must be also updated in the other VO scopes it belongs to, otherwise it will wrongly report there the scopes actually removed. In order to do so, the just removed scopes must be removed from the local GCUBEResource object by invoking the method GCUBEResource.removeScope(<scope to remove>) for both the VO and all the children VRE scopes and then the updateGCUBEResource operation of the IS-Publisher has to be invoked in all the remaining VO and VRE scopes.

Remove from the Infrastructure Scope

Target: Remove a Resource from the infrastructure scope

Component(s) to contact:

• Name: IS-Publisher

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: removeGCUBEResource

• Parameters: GCUBEResource=<resource ID>, Type=<resource type>, GCUBEScope=<Scope to remove from>, GCUBESecurityManager=ServiceContext.getContext()||<dummy manager>

Note: after the removal, the resource must be also updated in the other VO scopes it belongs to, otherwise it will wrongly report there the infrastructure scope actually removed. In order to do so, the just removed scope must be removed from the local GCUBEResource object by invoking the method GCUBEResource.removeScope(<infrastructure scope>) and then the updateGCUBEResource operation of the IS-Publisher has to be invoked in all the remaining VO and VRE scopes.

Deleting a gCube Resource

Delete a Resource from a Scope

Target: delete a resource from a scope

Scope constraint: a resource can be deleted if and only if it joins only the current scope. If the resource joins other scopes, it has to be only removed from the the current scope, but not deleted.

Component(s) to contact:

• Name: IS-Publisher

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: removeGCUBEResource. However, before to invoke this method, the resource must be removed from the the scope.

• Parameters: GCUBEResource=<resource ID>, Type=<resource type>, GCUBEScope=<Scope to remove from>, GCUBESecurityManager=ServiceContext.getContext()||<dummy manager>

Delete from the Infrastructure

Target: Delete a Resource from the infrastructure.

The resource must be

• firstly removed from the VOs it belongs to
• then removed from the Infrastructure Scope if it is also registered there.
• finally, it can be deleted from all its scopes

Editing a gCube Generic Resource

Target: edit a Generic Resource on the Information System.

Generic Way

Component(s) to contact:

• Name: IS-Publisher

• Where: in the local instance of gCore

• How to find it: on the classpath

• Operation to invoke: updateGCUBEResource

• Parameters: GCUBEResource=<resource>, GCUBEScope=<Scope>, GCUBESecurityManager=ServiceContext.getContext()||<dummy manager>

Exceptions

There exist exception to the general way to edit Generic Resources. These are mostly related to resources automatically generated by gCube Services that must be in turn contacted for editing.

Scope Resources

...