java.lang.Object
- com.yahoo.vespa.model.builder.xml.dom.NodesSpecification

```
public class NodesSpecification
extends java.lang.Object
```
A common utility class to represent a requirement for nodes during model building. Such a requirement is commonly specified in services.xml as a nodes element.

Author:

bratseth

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static NodesSpecification`	`dedicated(int count, ConfigModelContext context)`	Returns a requirement from `count` dedicated nodes in one group
`static NodesSpecification`	`from(ModelElement nodesElement, ConfigModelContext context)`	Returns a requirement for dedicated nodes taken from the given `nodes` element
`static java.util.Optional<NodesSpecification>`	`fromParent(ModelElement parentElement, ConfigModelContext context)`	Returns a requirement for dedicated nodes taken from the `nodes` element contained in the given parent element, or empty if the parent element is null, or the nodes elements is not present.
`boolean`	`isDedicated()`	Returns whether this requires dedicated nodes.
`boolean`	`isExclusive()`	Returns whether the physical hosts running the nodes of this application can also run nodes of other applications.
`com.yahoo.config.provision.ClusterResources`	`maxResources()`
`com.yahoo.config.provision.ClusterResources`	`minResources()`
`static NodesSpecification`	`nonDedicated(int count, ConfigModelContext context)`	Returns a requirement from `count` non-dedicated nodes in one group
`static java.util.Optional<NodesSpecification>`	`optionalDedicatedFromParent(ModelElement parentElement, ConfigModelContext context)`	Returns a requirement for non-dedicated or dedicated nodes taken from the `nodes` element contained in the given parent element, or empty if the parent element is null, or the nodes elements is not present.
`java.util.Map<HostResource,com.yahoo.config.provision.ClusterMembership>`	`provision(HostSystem hostSystem, com.yahoo.config.provision.ClusterSpec.Type clusterType, com.yahoo.config.provision.ClusterSpec.Id clusterId, com.yahoo.config.application.api.DeployLogger logger)`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

from

public static NodesSpecification from(ModelElement nodesElement,
                                      ConfigModelContext context)

Returns a requirement for dedicated nodes taken from the given nodes element

fromParent

public static java.util.Optional<NodesSpecification> fromParent(ModelElement parentElement,
                                                                ConfigModelContext context)

Returns a requirement for dedicated nodes taken from the nodes element contained in the given parent element, or empty if the parent element is null, or the nodes elements is not present.

optionalDedicatedFromParent

public static java.util.Optional<NodesSpecification> optionalDedicatedFromParent(ModelElement parentElement,
                                                                                 ConfigModelContext context)

Returns a requirement for non-dedicated or dedicated nodes taken from the nodes element contained in the given parent element, or empty if the parent element is null, or the nodes elements is not present.

nonDedicated

public static NodesSpecification nonDedicated(int count,
                                              ConfigModelContext context)

Returns a requirement from count non-dedicated nodes in one group

dedicated

public static NodesSpecification dedicated(int count,
                                           ConfigModelContext context)

Returns a requirement from count dedicated nodes in one group

minResources

public com.yahoo.config.provision.ClusterResources minResources()

maxResources

public com.yahoo.config.provision.ClusterResources maxResources()

isDedicated
```
public boolean isDedicated()
```
Returns whether this requires dedicated nodes. Otherwise the model encountering this request should reuse nodes requested for other purposes whenever possible.

isExclusive
```
public boolean isExclusive()
```
Returns whether the physical hosts running the nodes of this application can also run nodes of other applications. Using exclusive nodes for containers increases security and increases cost.

provision

public java.util.Map<HostResource,com.yahoo.config.provision.ClusterMembership> provision(HostSystem hostSystem,
                                                                                                com.yahoo.config.provision.ClusterSpec.Type clusterType,
                                                                                                com.yahoo.config.provision.ClusterSpec.Id clusterId,
                                                                                                com.yahoo.config.application.api.DeployLogger logger)

toString
```
public java.lang.String toString()
```
Overrides:

toString in class java.lang.Object

Class NodesSpecification