| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 backtype.storm.scheduler; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class Cluster { |
| |
| /** |
| * key: supervisor id, value: supervisor details |
| */ |
| private Map<String, SupervisorDetails> supervisors; |
| /** |
| * key: topologyId, value: topology's current assignments. |
| */ |
| private Map<String, SchedulerAssignmentImpl> assignments; |
| /** |
| * key topologyId, Value: scheduler's status. |
| */ |
| private Map<String, String> status; |
| |
| /** |
| * a map from hostname to supervisor id. |
| */ |
| private Map<String, List<String>> hostToId; |
| |
| private Set<String> blackListedHosts = new HashSet<String>(); |
| private INimbus inimbus; |
| |
| public Cluster(INimbus nimbus, Map<String, SupervisorDetails> supervisors, Map<String, SchedulerAssignmentImpl> assignments) { |
| this.inimbus = nimbus; |
| this.supervisors = new HashMap<String, SupervisorDetails>(supervisors.size()); |
| this.supervisors.putAll(supervisors); |
| this.assignments = new HashMap<String, SchedulerAssignmentImpl>(assignments.size()); |
| this.assignments.putAll(assignments); |
| this.status = new HashMap<String, String>(); |
| this.hostToId = new HashMap<String, List<String>>(); |
| for (String nodeId : supervisors.keySet()) { |
| SupervisorDetails supervisor = supervisors.get(nodeId); |
| String host = supervisor.getHost(); |
| if (!this.hostToId.containsKey(host)) { |
| this.hostToId.put(host, new ArrayList<String>()); |
| } |
| this.hostToId.get(host).add(nodeId); |
| } |
| } |
| |
| public void setBlacklistedHosts(Set<String> hosts) { |
| blackListedHosts = hosts; |
| } |
| |
| public Set<String> getBlacklistedHosts() { |
| return blackListedHosts; |
| } |
| |
| public void blacklistHost(String host) { |
| // this is so it plays well with setting blackListedHosts to an immutable list |
| if (blackListedHosts == null) |
| blackListedHosts = new HashSet<String>(); |
| if (!(blackListedHosts instanceof HashSet)) |
| blackListedHosts = new HashSet<String>(blackListedHosts); |
| blackListedHosts.add(host); |
| } |
| |
| public boolean isBlackListed(String supervisorId) { |
| return blackListedHosts != null && blackListedHosts.contains(getHost(supervisorId)); |
| } |
| |
| public boolean isBlacklistedHost(String host) { |
| return blackListedHosts != null && blackListedHosts.contains(host); |
| } |
| |
| public String getHost(String supervisorId) { |
| return inimbus.getHostName(supervisors, supervisorId); |
| } |
| |
| /** |
| * Gets all the topologies which needs scheduling. |
| * |
| * @param topologies |
| * @return |
| */ |
| public List<TopologyDetails> needsSchedulingTopologies(Topologies topologies) { |
| List<TopologyDetails> ret = new ArrayList<TopologyDetails>(); |
| for (TopologyDetails topology : topologies.getTopologies()) { |
| if (needsScheduling(topology)) { |
| ret.add(topology); |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Does the topology need scheduling? |
| * |
| * A topology needs scheduling if one of the following conditions holds: |
| * <ul> |
| * <li>Although the topology is assigned slots, but is squeezed. i.e. the topology is assigned less slots than desired.</li> |
| * <li>There are unassigned executors in this topology</li> |
| * </ul> |
| */ |
| public boolean needsScheduling(TopologyDetails topology) { |
| int desiredNumWorkers = topology.getNumWorkers(); |
| int assignedNumWorkers = this.getAssignedNumWorkers(topology); |
| |
| if (desiredNumWorkers > assignedNumWorkers) { |
| return true; |
| } |
| |
| return this.getUnassignedExecutors(topology).size() > 0; |
| } |
| |
| /** |
| * Gets a executor -> component-id map which needs scheduling in this topology. |
| * |
| * @param topology |
| * @return |
| */ |
| public Map<ExecutorDetails, String> getNeedsSchedulingExecutorToComponents(TopologyDetails topology) { |
| Collection<ExecutorDetails> allExecutors = new HashSet(topology.getExecutors()); |
| |
| SchedulerAssignment assignment = this.assignments.get(topology.getId()); |
| if (assignment != null) { |
| Collection<ExecutorDetails> assignedExecutors = assignment.getExecutors(); |
| allExecutors.removeAll(assignedExecutors); |
| } |
| |
| return topology.selectExecutorToComponent(allExecutors); |
| } |
| |
| /** |
| * Gets a component-id -> executors map which needs scheduling in this topology. |
| * |
| * @param topology |
| * @return |
| */ |
| public Map<String, List<ExecutorDetails>> getNeedsSchedulingComponentToExecutors(TopologyDetails topology) { |
| Map<ExecutorDetails, String> executorToComponents = this.getNeedsSchedulingExecutorToComponents(topology); |
| Map<String, List<ExecutorDetails>> componentToExecutors = new HashMap<String, List<ExecutorDetails>>(); |
| for (ExecutorDetails executor : executorToComponents.keySet()) { |
| String component = executorToComponents.get(executor); |
| if (!componentToExecutors.containsKey(component)) { |
| componentToExecutors.put(component, new ArrayList<ExecutorDetails>()); |
| } |
| |
| componentToExecutors.get(component).add(executor); |
| } |
| |
| return componentToExecutors; |
| } |
| |
| /** |
| * Get all the used ports of this supervisor. |
| * |
| * @param cluster |
| * @return |
| */ |
| public Set<Integer> getUsedPorts(SupervisorDetails supervisor) { |
| Map<String, SchedulerAssignment> assignments = this.getAssignments(); |
| Set<Integer> usedPorts = new HashSet<Integer>(); |
| |
| for (SchedulerAssignment assignment : assignments.values()) { |
| for (WorkerSlot slot : assignment.getExecutorToSlot().values()) { |
| if (slot.getNodeId().equals(supervisor.getId())) { |
| usedPorts.add(slot.getPort()); |
| } |
| } |
| } |
| |
| return usedPorts; |
| } |
| |
| /** |
| * Return the available ports of this supervisor. |
| * |
| * @param cluster |
| * @return |
| */ |
| public Set<Integer> getAvailablePorts(SupervisorDetails supervisor) { |
| Set<Integer> usedPorts = this.getUsedPorts(supervisor); |
| |
| Set<Integer> ret = new HashSet(); |
| ret.addAll(getAssignablePorts(supervisor)); |
| ret.removeAll(usedPorts); |
| |
| return ret; |
| } |
| |
| public Set<Integer> getAssignablePorts(SupervisorDetails supervisor) { |
| if (isBlackListed(supervisor.id)) |
| return new HashSet(); |
| return supervisor.allPorts; |
| } |
| |
| /** |
| * Return all the available slots on this supervisor. |
| * |
| * @param cluster |
| * @return |
| */ |
| public List<WorkerSlot> getAvailableSlots(SupervisorDetails supervisor) { |
| Set<Integer> ports = this.getAvailablePorts(supervisor); |
| List<WorkerSlot> slots = new ArrayList<WorkerSlot>(ports.size()); |
| |
| for (Integer port : ports) { |
| slots.add(new WorkerSlot(supervisor.getId(), port)); |
| } |
| |
| return slots; |
| } |
| |
| public List<WorkerSlot> getAssignableSlots(SupervisorDetails supervisor) { |
| Set<Integer> ports = this.getAssignablePorts(supervisor); |
| List<WorkerSlot> slots = new ArrayList<WorkerSlot>(ports.size()); |
| |
| for (Integer port : ports) { |
| slots.add(new WorkerSlot(supervisor.getId(), port)); |
| } |
| |
| return slots; |
| } |
| |
| /** |
| * get the unassigned executors of the topology. |
| */ |
| public Collection<ExecutorDetails> getUnassignedExecutors(TopologyDetails topology) { |
| if (topology == null) { |
| return new ArrayList<ExecutorDetails>(0); |
| } |
| |
| Collection<ExecutorDetails> ret = new HashSet(topology.getExecutors()); |
| |
| SchedulerAssignment assignment = this.getAssignmentById(topology.getId()); |
| if (assignment != null) { |
| Set<ExecutorDetails> assignedExecutors = assignment.getExecutors(); |
| ret.removeAll(assignedExecutors); |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Gets the number of workers assigned to this topology. |
| * |
| * @param topology |
| * @return |
| */ |
| public int getAssignedNumWorkers(TopologyDetails topology) { |
| SchedulerAssignment assignment = this.getAssignmentById(topology.getId()); |
| if (topology == null || assignment == null) { |
| return 0; |
| } |
| |
| Set<WorkerSlot> slots = new HashSet<WorkerSlot>(); |
| slots.addAll(assignment.getExecutorToSlot().values()); |
| |
| return slots.size(); |
| } |
| |
| /** |
| * Assign the slot to the executors for this topology. |
| * |
| * @throws RuntimeException if the specified slot is already occupied. |
| */ |
| public void assign(WorkerSlot slot, String topologyId, Collection<ExecutorDetails> executors) { |
| if (this.isSlotOccupied(slot)) { |
| throw new RuntimeException("slot: [" + slot.getNodeId() + ", " + slot.getPort() + "] is already occupied."); |
| } |
| |
| SchedulerAssignmentImpl assignment = (SchedulerAssignmentImpl) this.getAssignmentById(topologyId); |
| if (assignment == null) { |
| assignment = new SchedulerAssignmentImpl(topologyId, new HashMap<ExecutorDetails, WorkerSlot>()); |
| this.assignments.put(topologyId, assignment); |
| } else { |
| for (ExecutorDetails executor : executors) { |
| if (assignment.isExecutorAssigned(executor)) { |
| throw new RuntimeException("the executor is already assigned, you should unassign it before assign it to another slot."); |
| } |
| } |
| } |
| |
| assignment.assign(slot, executors); |
| } |
| |
| /** |
| * Gets all the available slots in the cluster. |
| * |
| * @return |
| */ |
| public List<WorkerSlot> getAvailableSlots() { |
| List<WorkerSlot> slots = new ArrayList<WorkerSlot>(); |
| for (SupervisorDetails supervisor : this.supervisors.values()) { |
| slots.addAll(this.getAvailableSlots(supervisor)); |
| } |
| |
| return slots; |
| } |
| |
| public List<WorkerSlot> getAssignableSlots() { |
| List<WorkerSlot> slots = new ArrayList<WorkerSlot>(); |
| for (SupervisorDetails supervisor : this.supervisors.values()) { |
| slots.addAll(this.getAssignableSlots(supervisor)); |
| } |
| |
| return slots; |
| } |
| |
| /** |
| * Free the specified slot. |
| * |
| * @param slot |
| */ |
| public void freeSlot(WorkerSlot slot) { |
| // remove the slot from the existing assignments |
| for (SchedulerAssignmentImpl assignment : this.assignments.values()) { |
| if (assignment.isSlotOccupied(slot)) { |
| assignment.unassignBySlot(slot); |
| } |
| } |
| } |
| |
| /** |
| * free the slots. |
| * |
| * @param slots |
| */ |
| public void freeSlots(Collection<WorkerSlot> slots) { |
| if (slots != null) { |
| for (WorkerSlot slot : slots) { |
| this.freeSlot(slot); |
| } |
| } |
| } |
| |
| /** |
| * Checks the specified slot is occupied. |
| * |
| * @param slot the slot be to checked. |
| * @return |
| */ |
| public boolean isSlotOccupied(WorkerSlot slot) { |
| for (SchedulerAssignment assignment : this.assignments.values()) { |
| if (assignment.isSlotOccupied(slot)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * get the current assignment for the topology. |
| */ |
| public SchedulerAssignment getAssignmentById(String topologyId) { |
| if (this.assignments.containsKey(topologyId)) { |
| return this.assignments.get(topologyId); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Get a specific supervisor with the <code>nodeId</code> |
| */ |
| public SupervisorDetails getSupervisorById(String nodeId) { |
| if (this.supervisors.containsKey(nodeId)) { |
| return this.supervisors.get(nodeId); |
| } |
| |
| return null; |
| } |
| |
| public Collection<WorkerSlot> getUsedSlots() { |
| Set<WorkerSlot> ret = new HashSet(); |
| for (SchedulerAssignmentImpl s : assignments.values()) { |
| ret.addAll(s.getExecutorToSlot().values()); |
| } |
| return ret; |
| } |
| |
| /** |
| * Get all the supervisors on the specified <code>host</code>. |
| * |
| * @param host hostname of the supervisor |
| * @return the <code>SupervisorDetails</code> object. |
| */ |
| public List<SupervisorDetails> getSupervisorsByHost(String host) { |
| List<String> nodeIds = this.hostToId.get(host); |
| List<SupervisorDetails> ret = new ArrayList<SupervisorDetails>(); |
| |
| if (nodeIds != null) { |
| for (String nodeId : nodeIds) { |
| ret.add(this.getSupervisorById(nodeId)); |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Get all the assignments. |
| */ |
| public Map<String, SchedulerAssignment> getAssignments() { |
| Map<String, SchedulerAssignment> ret = new HashMap<String, SchedulerAssignment>(this.assignments.size()); |
| |
| for (String topologyId : this.assignments.keySet()) { |
| ret.put(topologyId, this.assignments.get(topologyId)); |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Get all the supervisors. |
| */ |
| public Map<String, SupervisorDetails> getSupervisors() { |
| return this.supervisors; |
| } |
| |
| public void setStatus(String topologyId, String status) { |
| this.status.put(topologyId, status); |
| } |
| |
| public Map<String, String> getStatusMap() { |
| return this.status; |
| } |
| } |