org.apache.whirr.command
Class AbstractClusterCommand

java.lang.Object
  org.apache.whirr.command.Command
      org.apache.whirr.command.AbstractClusterCommand

Direct Known Subclasses:

CleanupClusterCommand, DestroyClusterCommand, DestroyInstanceCommand, LaunchClusterCommand, ListClusterCommand, ListProvidersCommand, RoleLifecycleCommand, RunScriptCommand

public abstract class AbstractClusterCommand
extends Command

An abstract command for interacting with clusters.

Field Summary

protected ClusterControllerFactory	factory
protected joptsimple.OptionParser	parser
protected ClusterStateStoreFactory	stateStoreFactory

Constructor Summary

AbstractClusterCommand(String name, String description, ClusterControllerFactory factory)

AbstractClusterCommand(String name, String description, ClusterControllerFactory factory, ClusterStateStoreFactory stateStoreFactory)

Method Summary

protected ClusterController	createClusterController(String serviceName) Create the specified service
protected ClusterStateStore	createClusterStateStore(ClusterSpec spec) Create the cluster state store object
protected Cluster	getCluster(ClusterSpec clusterSpec, ClusterController controller) Get the cluster instance together with NodeMetadata (through API calls)
protected ClusterSpec	getClusterSpec(joptsimple.OptionSet optionSet) Load the cluster spec by parsing the command line option set
protected void	printErrorAndHelpHint(PrintStream stream, Throwable e) Print command execution error and a hint to help the user get more help
protected void	printProviderInfo(PrintStream out, PrintStream err, ClusterSpec clusterSpec, joptsimple.OptionSet optionSet)
void	printUsage(PrintStream stream) Print a generic usage indication for commands

Methods inherited from class org.apache.whirr.command.Command

getDescription, getName, run

Methods inherited from class java.lang.Object

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

Field Detail

factory

protected ClusterControllerFactory factory

stateStoreFactory

protected ClusterStateStoreFactory stateStoreFactory

parser

protected joptsimple.OptionParser parser

Constructor Detail

AbstractClusterCommand

public AbstractClusterCommand(String name,
                              String description,
                              ClusterControllerFactory factory)

AbstractClusterCommand

public AbstractClusterCommand(String name,
                              String description,
                              ClusterControllerFactory factory,
                              ClusterStateStoreFactory stateStoreFactory)

Method Detail

getClusterSpec

protected ClusterSpec getClusterSpec(joptsimple.OptionSet optionSet)
                              throws org.apache.commons.configuration.ConfigurationException

Load the cluster spec by parsing the command line option set

Throws:

org.apache.commons.configuration.ConfigurationException

getCluster

protected Cluster getCluster(ClusterSpec clusterSpec,
                             ClusterController controller)
                      throws IOException,
                             InterruptedException

Get the cluster instance together with NodeMetadata (through API calls)

Throws:

IOException

InterruptedException

createClusterController

protected ClusterController createClusterController(String serviceName)

Create the specified service

createClusterStateStore

protected ClusterStateStore createClusterStateStore(ClusterSpec spec)

Create the cluster state store object

printProviderInfo

protected void printProviderInfo(PrintStream out,
                                 PrintStream err,
                                 ClusterSpec clusterSpec,
                                 joptsimple.OptionSet optionSet)

printErrorAndHelpHint

protected void printErrorAndHelpHint(PrintStream stream,
                                     Throwable e)

Print command execution error and a hint to help the user get more help

printUsage

public void printUsage(PrintStream stream)
                throws IOException

Print a generic usage indication for commands

Specified by:

printUsage in class Command

Throws:

IOException