org.apache.ambari.server.topology

Class HostGroupImpl

java.lang.Object

org.apache.ambari.server.topology.HostGroupImpl

All Implemented Interfaces:

HostGroup

public class HostGroupImpl
extends Object
implements HostGroup

Host Group implementation.

Field Summary

Fields inherited from interface org.apache.ambari.server.topology.HostGroup

HOSTGROUP_REGEX

Constructor Summary

Constructors

Constructor and Description
HostGroupImpl(HostGroupEntity entity, String blueprintName, Stack stack)
HostGroupImpl(String name, String bpName, Stack stack, Collection<Component> components, Configuration configuration, String cardinality)

Method Summary

Modifier and Type	Method and Description
boolean	addComponent(String component) Add a component to the host group.
boolean	addComponent(String component, ProvisionAction provisionAction) Add a component with the specified provision action to the host group.
boolean	containsMasterComponent() Determine if the host group contains a master component.
static String	formatAbsoluteName(String bpName, String hgName)
String	getBlueprintName() Get the associated blueprint name.
String	getCardinality() Get the cardinality value that was specified for the host group.
Collection<String>	getComponentNames() Get all of the host group component names
Collection<String>	getComponentNames(ProvisionAction provisionAction) Get all host group component names for instances that have the specified provision action association.
Collection<Component>	getComponents() Get all of the host group components.
Collection<String>	getComponents(String service) Get the components for the specified service which are associated with the host group.
Configuration	getConfiguration() Get this host groups configuration.
String	getFullyQualifiedName() Get the fully qualified host group name in the form of blueprintName:hostgroupName
String	getName() Get the name of the host group.
Collection<String>	getServices() Get the services which are deployed to this host group.
Stack	getStack() Get the stack associated with the host group.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

HostGroupImpl

public HostGroupImpl(HostGroupEntity entity,
                     String blueprintName,
                     Stack stack)

HostGroupImpl

public HostGroupImpl(String name,
                     String bpName,
                     Stack stack,
                     Collection<Component> components,
                     Configuration configuration,
                     String cardinality)

Method Detail

getName

public String getName()

Description copied from interface: HostGroup

Get the name of the host group.

Specified by:

getName in interface HostGroup

Returns:

the host group name

getFullyQualifiedName

public String getFullyQualifiedName()

Description copied from interface: HostGroup

Get the fully qualified host group name in the form of blueprintName:hostgroupName

Specified by:

getFullyQualifiedName in interface HostGroup

Returns:

fully qualified host group name

formatAbsoluteName

public static String formatAbsoluteName(String bpName,
                                        String hgName)

getComponents

public Collection<Component> getComponents()

Description copied from interface: HostGroup

Get all of the host group components.

Specified by:

getComponents in interface HostGroup

Returns:

collection of component instances

getComponentNames

public Collection<String> getComponentNames()

Description copied from interface: HostGroup

Get all of the host group component names

Specified by:

getComponentNames in interface HostGroup

Returns:

collection of component names as String

getComponentNames

public Collection<String> getComponentNames(ProvisionAction provisionAction)

Description copied from interface: HostGroup

Get all host group component names for instances that have the specified provision action association.

Specified by:

getComponentNames in interface HostGroup

Parameters:

provisionAction - the provision action that must be associated with the component names returned

Returns:

collection of component names as String that are associated with the specified provision action

getServices

public Collection<String> getServices()

Get the services which are deployed to this host group.

Specified by:

getServices in interface HostGroup

Returns:

collection of services which have components in this host group

addComponent

public boolean addComponent(String component)

Add a component to the host group.

Specified by:

addComponent in interface HostGroup

Parameters:

component - component to add

Returns:

true if component was added; false if component already existed

addComponent

public boolean addComponent(String component,
                            ProvisionAction provisionAction)

Add a component with the specified provision action to the host group.

Specified by:

addComponent in interface HostGroup

Parameters:

component - component name

provisionAction - provision action for this component

Returns:

true if component was added; false if component already existed

getComponents

public Collection<String> getComponents(String service)

Get the components for the specified service which are associated with the host group.

Specified by:

getComponents in interface HostGroup

Parameters:

service - service name

Returns:

set of component names

getConfiguration

public Configuration getConfiguration()

Get this host groups configuration.

Specified by:

getConfiguration in interface HostGroup

Returns:

configuration instance

getBlueprintName

public String getBlueprintName()

Get the associated blueprint name.

Specified by:

getBlueprintName in interface HostGroup

Returns:

associated blueprint name

containsMasterComponent

public boolean containsMasterComponent()

Description copied from interface: HostGroup

Determine if the host group contains a master component.

Specified by:

containsMasterComponent in interface HostGroup

Returns:

true if the host group contains a master component; false otherwise

getStack

public Stack getStack()

Description copied from interface: HostGroup

Get the stack associated with the host group.

Specified by:

getStack in interface HostGroup

Returns:

associated stack

getCardinality

public String getCardinality()

Description copied from interface: HostGroup

Get the cardinality value that was specified for the host group. This is simply meta-data for the stack that a deployer can use and this information is not used by ambari.

Specified by:

getCardinality in interface HostGroup

Returns:

the cardinality specified for the hostgroup

toString

public String toString()

Overrides:

toString in class Object