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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.hadoop.yarn.server.api.records;
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+
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+import org.apache.hadoop.classification.InterfaceAudience.Private;
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+import org.apache.hadoop.classification.InterfaceStability.Evolving;
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+import org.apache.hadoop.yarn.util.Records;
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+
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+/**
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+ * <p>
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+ * <code>ResourceUtilization</code> models the utilization of a set of computer
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+ * resources in the cluster.
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+ * </p>
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+ */
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+@Private
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+@Evolving
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+public abstract class ResourceUtilization implements
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+ Comparable<ResourceUtilization> {
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+ public static ResourceUtilization newInstance(int pmem, int vmem, float cpu) {
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+ ResourceUtilization utilization =
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+ Records.newRecord(ResourceUtilization.class);
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+ utilization.setPhysicalMemory(pmem);
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+ utilization.setVirtualMemory(vmem);
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+ utilization.setCPU(cpu);
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+ return utilization;
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+ }
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+
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+ /**
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+ * Get used <em>virtual memory</em>.
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+ *
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+ * @return <em>virtual memory</em> in MB
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+ */
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+ public abstract int getVirtualMemory();
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+
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+ /**
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+ * Set used <em>virtual memory</em>.
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+ *
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+ * @param vmem <em>virtual memory</em> in MB
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+ */
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+ public abstract void setVirtualMemory(int vmem);
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+
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+ /**
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+ * Get <em>physical memory</em>.
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+ *
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+ * @return <em>physical memory</em> in MB
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+ */
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+ public abstract int getPhysicalMemory();
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+
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+ /**
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+ * Set <em>physical memory</em>.
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+ *
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+ * @param pmem <em>physical memory</em> in MB
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+ */
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+ public abstract void setPhysicalMemory(int pmem);
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+
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+ /**
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+ * Get <em>CPU</em> utilization.
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+ *
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+ * @return <em>CPU utilization</em> normalized to 1 CPU
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+ */
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+ public abstract float getCPU();
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+
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+ /**
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+ * Set <em>CPU</em> utilization.
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+ *
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+ * @param cpu <em>CPU utilization</em> normalized to 1 CPU
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+ */
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+ public abstract void setCPU(float cpu);
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+
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+ @Override
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+ public int hashCode() {
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+ final int prime = 263167;
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+ int result = 3571;
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+ result = prime * result + getVirtualMemory();
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+ result = prime * result + getPhysicalMemory();
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+ result = 31 * result + Float.valueOf(getCPU()).hashCode();
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+ return result;
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+ }
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+
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+ @Override
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+ public boolean equals(Object obj) {
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+ if (this == obj) {
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+ return true;
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+ }
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+ if (obj == null) {
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+ return false;
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+ }
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+ if (!(obj instanceof ResourceUtilization)) {
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+ return false;
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+ }
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+ ResourceUtilization other = (ResourceUtilization) obj;
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+ if (getVirtualMemory() != other.getVirtualMemory()
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+ || getPhysicalMemory() != other.getPhysicalMemory()
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+ || getCPU() != other.getCPU()) {
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+ return false;
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+ }
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+ return true;
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+ }
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+
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+ @Override
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+ public String toString() {
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+ return "<pmem:" + getPhysicalMemory() + ", vmem:" + getVirtualMemory()
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+ + ", vCores:" + getCPU() + ">";
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+ }
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+
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+ /**
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+ * Add utilization to the current one.
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+ * @param pmem Physical memory used to add.
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+ * @param vmem Virtual memory used to add.
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+ * @param cpu CPU utilization to add.
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+ */
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+ public void addTo(int pmem, int vmem, float cpu) {
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+ this.setPhysicalMemory(this.getPhysicalMemory() + pmem);
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+ this.setVirtualMemory(this.getVirtualMemory() + vmem);
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+ this.setCPU(this.getCPU() + cpu);
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+ }
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+}
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