org.apache.ambari.server.stack.upgrade.orchestrate

Class TaskWrapperBuilder

java.lang.Object

org.apache.ambari.server.stack.upgrade.orchestrate.TaskWrapperBuilder

public class TaskWrapperBuilder
extends Object

Generates a collection of tasks that need to run on a set of hosts during an upgarde.

Constructor Summary

Constructors

Constructor and Description
TaskWrapperBuilder()

Method Summary

Modifier and Type	Method and Description
static Set<String>	getEffectiveHosts(List<TaskWrapper> tasks) Given a collection of tasks, get the union of the hosts.
static List<TaskWrapper>	getTaskList(String service, String component, HostsType hostsType, List<Task> tasks, Map<String,String> params) Creates a collection of task wrappers based on the set of hosts they are allowed to run on by analyzing the "hosts" attribute of any ExecuteTask objects.

Methods inherited from class java.lang.Object

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

Constructor Detail

TaskWrapperBuilder

public TaskWrapperBuilder()

Method Detail

getTaskList

public static List<TaskWrapper> getTaskList(String service,
                                            String component,
                                            HostsType hostsType,
                                            List<Task> tasks,
                                            Map<String,String> params)

Creates a collection of task wrappers based on the set of hosts they are allowed to run on by analyzing the "hosts" attribute of any ExecuteTask objects.

Parameters:

service - the service name for the tasks

component - the component name for the tasks

hostsType - the collection of sets along with their status

tasks - collection of tasks

params - additional parameters

Returns:

the task wrappers, one for each task that is passed with tasks

getEffectiveHosts

public static Set<String> getEffectiveHosts(List<TaskWrapper> tasks)

Given a collection of tasks, get the union of the hosts.

Parameters:

tasks - Collection of tasks

Returns:

Returns the union of the hosts scheduled to perform the tasks.