| /** |
| * 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 org.apache.heron.packing.builder; |
| |
| import java.util.HashSet; |
| |
| import com.google.common.base.Optional; |
| |
| import org.apache.heron.common.basics.ByteAmount; |
| import org.apache.heron.packing.exceptions.ResourceExceededException; |
| import org.apache.heron.packing.utils.PackingUtils; |
| import org.apache.heron.spi.packing.PackingException; |
| import org.apache.heron.spi.packing.PackingPlan; |
| import org.apache.heron.spi.packing.Resource; |
| |
| /** |
| * Class that describes a container used to place Heron Instances with specific memory, CPU and disk |
| * requirements. Each container has limited RAM, CpuCores and disk resources. |
| */ |
| public class Container { |
| |
| private int containerId; |
| private HashSet<PackingPlan.InstancePlan> instances; |
| private Resource capacity; |
| private int paddingPercentage; |
| |
| /** |
| * Creates a container with a specific capacity which will maintain a specific percentage |
| * of its resources for padding. |
| * |
| * @param capacity the capacity of the container in terms of CPU, RAM and disk |
| * @param paddingPercentage the padding percentage |
| */ |
| Container(int containerId, Resource capacity, int paddingPercentage) { |
| this.containerId = containerId; |
| this.capacity = capacity; |
| this.instances = new HashSet<PackingPlan.InstancePlan>(); |
| this.paddingPercentage = paddingPercentage; |
| } |
| |
| public int getContainerId() { |
| return containerId; |
| } |
| |
| public HashSet<PackingPlan.InstancePlan> getInstances() { |
| return instances; |
| } |
| |
| public Resource getCapacity() { |
| return capacity; |
| } |
| |
| int getPaddingPercentage() { |
| return paddingPercentage; |
| } |
| |
| /** |
| * Update the resources currently used by the container, when a new instance with specific |
| * resource requirements has been assigned to the container. |
| */ |
| void add(PackingPlan.InstancePlan instancePlan) throws ResourceExceededException { |
| if (this.instances.contains(instancePlan)) { |
| throw new PackingException(String.format( |
| "Instance %s already exists in container %s", instancePlan, toString())); |
| } |
| assertHasSpace(instancePlan.getResource()); |
| this.instances.add(instancePlan); |
| } |
| |
| /** |
| * Remove an instance of a particular component from a container and update its |
| * corresponding resources. |
| * |
| * @return the corresponding instance plan if the instance is removed the container. |
| * Return void if an instance is not found |
| */ |
| Optional<PackingPlan.InstancePlan> removeAnyInstanceOfComponent(String component) { |
| Optional<PackingPlan.InstancePlan> instancePlan = getAnyInstanceOfComponent(component); |
| if (instancePlan.isPresent()) { |
| PackingPlan.InstancePlan plan = instancePlan.get(); |
| this.instances.remove(plan); |
| return instancePlan; |
| } |
| return Optional.absent(); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("{containerId=%s, instances=%s, capacity=%s, paddingPercentage=%s}", |
| containerId, instances, capacity, paddingPercentage); |
| } |
| |
| /** |
| * Find whether any instance of a particular component is assigned to the container |
| * |
| * @return an optional including the InstancePlan if found |
| */ |
| private Optional<PackingPlan.InstancePlan> getAnyInstanceOfComponent(String componentName) { |
| for (PackingPlan.InstancePlan instancePlan : this.instances) { |
| if (instancePlan.getComponentName().equals(componentName)) { |
| return Optional.of(instancePlan); |
| } |
| } |
| return Optional.absent(); |
| } |
| |
| /** |
| * Return the instance of componentName with a matching componentIndex if it exists |
| * |
| * @return an optional including the InstancePlan if found |
| */ |
| Optional<PackingPlan.InstancePlan> getInstance(String componentName, int componentIndex) { |
| for (PackingPlan.InstancePlan instancePlan : this.instances) { |
| if (instancePlan.getComponentName().equals(componentName) |
| && instancePlan.getComponentIndex() == componentIndex) { |
| return Optional.of(instancePlan); |
| } |
| } |
| return Optional.absent(); |
| } |
| |
| /** |
| * Return the instance of with a given taskId if it exists |
| * |
| * @return an optional including the InstancePlan if found |
| */ |
| Optional<PackingPlan.InstancePlan> getInstance(int taskId) { |
| for (PackingPlan.InstancePlan instancePlan : this.instances) { |
| if (instancePlan.getTaskId() == taskId) { |
| return Optional.of(instancePlan); |
| } |
| } |
| return Optional.absent(); |
| } |
| |
| /** |
| * Check whether the container can accommodate a new instance with specific resource requirements |
| */ |
| private void assertHasSpace(Resource resource) throws ResourceExceededException { |
| Resource usedResources = this.getTotalUsedResources(); |
| ByteAmount newRam = |
| usedResources.getRam().plus(resource.getRam()).increaseBy(paddingPercentage); |
| double newCpu = Math.round( |
| PackingUtils.increaseBy(usedResources.getCpu() + resource.getCpu(), paddingPercentage)); |
| ByteAmount newDisk = |
| usedResources.getDisk().plus(resource.getDisk()).increaseBy(paddingPercentage); |
| |
| if (newRam.greaterThan(this.capacity.getRam())) { |
| throw new ResourceExceededException(String.format("Adding %s bytes of RAM to existing %s " |
| + "bytes with %d percent padding would exceed capacity %s", |
| resource.getRam(), usedResources.getRam(), paddingPercentage, this.capacity.getRam())); |
| } |
| if (newCpu > this.capacity.getCpu()) { |
| throw new ResourceExceededException(String.format("Adding %s cores to existing %s " |
| + "cores with %d percent padding would exceed capacity %s", |
| resource.getCpu(), usedResources.getCpu(), paddingPercentage, this.capacity.getCpu())); |
| } |
| if (newDisk.greaterThan(this.capacity.getDisk())) { |
| throw new ResourceExceededException(String.format("Adding %s bytes of disk to existing %s " |
| + "bytes with %s percent padding would exceed capacity %s", |
| resource.getDisk(), usedResources.getDisk(), paddingPercentage, this.capacity.getDisk())); |
| } |
| } |
| |
| /** |
| * Computes the used resources of the container by taking into account the resources |
| * allocated for each instance. |
| * |
| * @return a Resource object that describes the used CPU, RAM and disk in the container. |
| */ |
| public Resource getTotalUsedResources() { |
| ByteAmount usedRam = ByteAmount.ZERO; |
| double usedCpuCores = 0; |
| ByteAmount usedDisk = ByteAmount.ZERO; |
| for (PackingPlan.InstancePlan instancePlan : this.instances) { |
| Resource resource = instancePlan.getResource(); |
| usedRam = usedRam.plus(resource.getRam()); |
| usedCpuCores += resource.getCpu(); |
| usedDisk = usedDisk.plus(resource.getDisk()); |
| } |
| return new Resource(usedCpuCores, usedRam, usedDisk); |
| } |
| } |