com.netflix.fenzo.VMAssignmentResult Maven / Gradle / Ivy
/*
* Copyright 2015 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.netflix.fenzo;
import java.util.List;
import java.util.Set;
/**
* Result of resource assignments for a host (VM). When you call your task scheduler's
* {@link TaskScheduler#scheduleOnce(java.util.List,java.util.List) scheduleOnce()} method to schedule a set of
* tasks, that method returns a {@link SchedulingResult}. That object includes the method
* {@link SchedulingResult#getResultMap() getResultMap()} which returns a map of host names to
* {@code VMAssignmentResult} objects. Those objects in turn have the {@link #getLeasesUsed()} and
* {@link #getTasksAssigned()} methods, which return information about the resource offers that participated in
* the assignments and which tasks were assigned on those hosts, in the form of {@link VirtualMachineLease}
* objects and {@link TaskAssignmentResult} objects respectively. This approach will give you insight into which
* tasks have been assigned to which hosts in the current scheduling round (but not about which tasks are
* already running on those hosts).
*/
public class VMAssignmentResult {
private final String hostname;
private final List leasesUsed;
private final Set tasksAssigned;
public VMAssignmentResult(String hostname, List leasesUsed, Set tasksAssigned) {
this.hostname = hostname;
this.leasesUsed = leasesUsed;
this.tasksAssigned = tasksAssigned;
}
/**
* Get the name of the host whose assignment results are available.
*
* @return the name of the host
*/
public String getHostname() {
return hostname;
}
/**
* Get the list of leases (resource offers) used in creating the resource assignments for tasks.
*
* @return a List of leases
*/
public List getLeasesUsed() {
return leasesUsed;
}
/**
* Get the set of tasks that are assigned resources from this host.
*
* @return a Set of task assignment results
*/
public Set getTasksAssigned() {
return tasksAssigned;
}
@Override
public String toString() {
return "VMAssignmentResult{" +
"hostname='" + hostname + '\'' +
", leasesUsed=" + leasesUsed +
", tasksAssigned=" + tasksAssigned +
'}';
}
}