org.apache.ambari.server.state

Interface Clusters

All Known Implementing Classes:

ClustersImpl

public interface Clusters

Single entity that tracks all clusters and hosts that are managed by the Ambari server

Method Summary

Modifier and Type	Method and Description
void	addCluster(String clusterName) Add a new Cluster
void	addHost(String hostname) Add a Host object to be managed by this server
void	debugDump(StringBuilder sb) Produces a debug dump into the supplied string buffer
void	deleteCluster(String clusterName) Deletes the cluster identified by the name
void	deleteHost(String hostname) Removes a host.
Cluster	getCluster(String clusterName) Gets the Cluster given the cluster name
Cluster	getClusterById(long id) Gets the cluster using the id.
Map<String,Cluster>	getClusters() Get all clusters
Set<Cluster>	getClustersForHost(String hostname) Returns all the cluster names for this hostname
Host	getHost(String hostname) Get a Host object managed by this server
List<Host>	getHosts() Get all hosts being tracked by the Ambari server
Map<String,Host>	getHostsForCluster(String clusterName) Gets all the hosts associated with the cluster
void	mapHostsToCluster(Set<String> hostnames, String clusterName) Maps a set of hosts to the given cluster
void	mapHostToCluster(String hostname, String clusterName) Map host to the given cluster.
void	setCurrentStackVersion(String clusterName, StackId stackId) Sets the current stack version for the cluster
void	unmapHostFromCluster(String hostname, String clusterName) Removes a host from a cluster.
void	updateClusterName(String oldName, String newName) Updates the name of the cluster
void	updateHostWithClusterAndAttributes(Map<String,Set<String>> hostsClusters, Map<String,Map<String,String>> hostAttributes) Update the host set for clusters and the host attributes associated with the hosts

Method Detail

addCluster

void addCluster(String clusterName)
         throws AmbariException

Add a new Cluster

Parameters:

clusterName -

Throws:

AmbariException

getCluster

Cluster getCluster(String clusterName)
            throws AmbariException

Gets the Cluster given the cluster name

Parameters:

clusterName - Name of the Cluster to retrieve

Returns:

Cluster identified by the given name

Throws:

AmbariException

getClusters

Map<String,Cluster> getClusters()

Get all clusters

Returns:

Map of clusters with cluster name as key

getHosts

List<Host> getHosts()

Get all hosts being tracked by the Ambari server

Returns:

List of Host

getClustersForHost

Set<Cluster> getClustersForHost(String hostname)
                         throws AmbariException

Returns all the cluster names for this hostname

Parameters:

hostname -

Returns:

List of cluster names

Throws:

AmbariException

getHost

Host getHost(String hostname)
      throws AmbariException

Get a Host object managed by this server

Parameters:

hostname - Name of the host requested

Returns:

Host object

Throws:

AmbariException

addHost

void addHost(String hostname)
      throws AmbariException

Add a Host object to be managed by this server

Parameters:

hostname - Host to be added

Throws:

AmbariException

mapHostToCluster

void mapHostToCluster(String hostname,
                      String clusterName)
               throws AmbariException

Map host to the given cluster. A host can belong to multiple clusters

Parameters:

hostname -

clusterName -

Throws:

AmbariException

mapHostsToCluster

void mapHostsToCluster(Set<String> hostnames,
                       String clusterName)
                throws AmbariException

Maps a set of hosts to the given cluster

Parameters:

hostnames -

clusterName -

Throws:

AmbariException

updateClusterName

void updateClusterName(String oldName,
                       String newName)

Updates the name of the cluster

Parameters:

oldName -

newName -

Throws:

AmbariException

getClusterById

Cluster getClusterById(long id)
                throws AmbariException

Gets the cluster using the id.

Parameters:

id - The identifier associated with the cluster

Returns:

Cluster identified by the identifier

Throws:

AmbariException

debugDump

void debugDump(StringBuilder sb)

Produces a debug dump into the supplied string buffer

Parameters:

sb - The string buffer to add the debug dump to

getHostsForCluster

Map<String,Host> getHostsForCluster(String clusterName)
                             throws AmbariException

Gets all the hosts associated with the cluster

Parameters:

clusterName - The name of the cluster

Returns:

Map containing host name and Host

Throws:

AmbariException

deleteCluster

void deleteCluster(String clusterName)
            throws AmbariException

Deletes the cluster identified by the name

Parameters:

clusterName - The name of the cluster

Throws:

AmbariException

setCurrentStackVersion

void setCurrentStackVersion(String clusterName,
                            StackId stackId)
                     throws AmbariException

Sets the current stack version for the cluster

Parameters:

clusterName - The name of the cluster

stackId - The identifier for the stack

Throws:

AmbariException

updateHostWithClusterAndAttributes

void updateHostWithClusterAndAttributes(Map<String,Set<String>> hostsClusters,
                                        Map<String,Map<String,String>> hostAttributes)
                                 throws AmbariException

Update the host set for clusters and the host attributes associated with the hosts

Parameters:

hostsClusters -

hostAttributes -

Throws:

AmbariException

unmapHostFromCluster

void unmapHostFromCluster(String hostname,
                          String clusterName)
                   throws AmbariException

Removes a host from a cluster. Inverts {@link #mapHostToCluster(String, String)

Parameters:

hostname -

clusterName -

Throws:

AmbariException

deleteHost

void deleteHost(String hostname)
         throws AmbariException

Removes a host. Inverts addHost(String)

Parameters:

hostname -

Throws:

AmbariException