| 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
| 3 | * contributor license agreements. See the NOTICE file distributed with |
| 4 | * this work for additional information regarding copyright ownership. |
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
| 6 | * (the "License"); you may not use this file except in compliance with |
| 7 | * the License. You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | package org.jclouds.glesys.domain; |
| 18 | |
| 19 | import static com.google.common.base.Preconditions.checkNotNull; |
| 20 | |
| 21 | import java.beans.ConstructorProperties; |
| 22 | |
| 23 | import com.google.common.base.Objects; |
| 24 | import com.google.common.base.Objects.ToStringHelper; |
| 25 | |
| 26 | /** |
| 27 | * Detailed information on usage |
| 28 | * |
| 29 | * @author Adam Lowe |
| 30 | * @see ServerStatus |
| 31 | */ |
| 32 | public class ResourceStatus { |
| 33 | |
| 34 | public static Builder<?> builder() { |
| 35 | return new ConcreteBuilder(); |
| 36 | } |
| 37 | |
| 38 | public Builder<?> toBuilder() { |
| 39 | return new ConcreteBuilder().fromResourceUsage(this); |
| 40 | } |
| 41 | |
| 42 | public abstract static class Builder<T extends Builder<T>> { |
| 43 | protected abstract T self(); |
| 44 | |
| 45 | protected double usage; |
| 46 | protected double max; |
| 47 | protected String unit; |
| 48 | |
| 49 | /** |
| 50 | * @see ResourceStatus#getUsage() |
| 51 | */ |
| 52 | public T usage(double usage) { |
| 53 | this.usage = usage; |
| 54 | return self(); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @see ResourceStatus#getMax() |
| 59 | */ |
| 60 | public T max(double max) { |
| 61 | this.max = max; |
| 62 | return self(); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * @see ResourceStatus#getUnit() |
| 67 | */ |
| 68 | public T unit(String unit) { |
| 69 | this.unit = checkNotNull(unit, "unit"); |
| 70 | return self(); |
| 71 | } |
| 72 | |
| 73 | public ResourceStatus build() { |
| 74 | return new ResourceStatus(usage, max, unit); |
| 75 | } |
| 76 | |
| 77 | public T fromResourceUsage(ResourceStatus in) { |
| 78 | return this.usage(in.getUsage()).max(in.getMax()).unit(in.getUnit()); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | private static class ConcreteBuilder extends Builder<ConcreteBuilder> { |
| 83 | @Override |
| 84 | protected ConcreteBuilder self() { |
| 85 | return this; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | private final double usage; |
| 90 | private final double max; |
| 91 | private final String unit; |
| 92 | |
| 93 | @ConstructorProperties({ |
| 94 | "usage", "max", "unit" |
| 95 | }) |
| 96 | protected ResourceStatus(double usage, double max, String unit) { |
| 97 | this.usage = usage; |
| 98 | this.max = max; |
| 99 | this.unit = checkNotNull(unit, "unit"); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * @return the usage in #unit |
| 104 | */ |
| 105 | public double getUsage() { |
| 106 | return this.usage; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * @return the max usage in #unit |
| 111 | */ |
| 112 | public double getMax() { |
| 113 | return this.max; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * @return the unit used |
| 118 | */ |
| 119 | public String getUnit() { |
| 120 | return this.unit; |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | public int hashCode() { |
| 125 | return Objects.hashCode(usage, max, unit); |
| 126 | } |
| 127 | |
| 128 | @Override |
| 129 | public boolean equals(Object obj) { |
| 130 | if (this == obj) return true; |
| 131 | if (obj == null || getClass() != obj.getClass()) return false; |
| 132 | ResourceStatus that = ResourceStatus.class.cast(obj); |
| 133 | return Objects.equal(this.usage, that.usage) |
| 134 | && Objects.equal(this.max, that.max) |
| 135 | && Objects.equal(this.unit, that.unit); |
| 136 | } |
| 137 | |
| 138 | protected ToStringHelper string() { |
| 139 | return Objects.toStringHelper("").add("usage", usage).add("max", max).add("unit", unit); |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | public String toString() { |
| 144 | return string().toString(); |
| 145 | } |
| 146 | |
| 147 | } |