Vm.java

package org.ovirt.mobile.movirt.rest.dto;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import org.ovirt.mobile.movirt.rest.ParseUtils;
import org.ovirt.mobile.movirt.rest.RestEntityWrapper;
import org.ovirt.mobile.movirt.util.ObjectUtils;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.List;

@JsonIgnoreProperties(ignoreUnknown = true)
public class Vm implements RestEntityWrapper<org.ovirt.mobile.movirt.model.Vm> {

    private static final String CPU_PERCENTAGE_STAT = "cpu.current.total";
    private static final String TOTAL_MEMORY_STAT = "memory.installed";
    private static final String USED_MEMORY_STAT = "memory.used";

    // public for json mapping
    public String id;
    public String name;
    public Statistics statistics;
    public String memory;
    public Os os;
    public Cpu cpu;

    @JsonIgnoreProperties(ignoreUnknown = true)
    public static class Os {
        public String type;
    }

    @JsonIgnoreProperties(ignoreUnknown = true)
    public static class Cpu {
        public Topology topology;
    }

    @Override
    public String toString() {
        return String.format("Vm: name=%s, id=%s", name, id);
    }

    public org.ovirt.mobile.movirt.model.Vm toEntity() {
        org.ovirt.mobile.movirt.model.Vm vm = new org.ovirt.mobile.movirt.model.Vm();
        vm.setId(id);
        vm.setName(name);

        if (statistics != null && statistics.statistic != null) {
            BigDecimal cpu = getStatisticValueByName(CPU_PERCENTAGE_STAT, statistics.statistic);
            BigDecimal totalMemory = getStatisticValueByName(TOTAL_MEMORY_STAT, statistics.statistic);
            BigDecimal usedMemory = getStatisticValueByName(USED_MEMORY_STAT, statistics.statistic);

            vm.setCpuUsage(cpu.doubleValue());
            if (BigDecimal.ZERO.equals(totalMemory)) {
                vm.setMemoryUsage(0);
            } else {
                vm.setMemoryUsage(100 * usedMemory.divide(totalMemory, 3, RoundingMode.HALF_UP).doubleValue());
            }

            vm.setUsedMemorySize(usedMemory.longValue());
        }

        vm.setMemorySize(ObjectUtils.parseLong(memory));

        if (cpu != null && cpu.topology != null) {
            vm.setSockets(ParseUtils.intOrDefault(cpu.topology.sockets));
            vm.setCoresPerSocket(ParseUtils.intOrDefault(cpu.topology.cores));
        } else {
            vm.setSockets(-1);
            vm.setCoresPerSocket(-1);
        }

        if (os != null) {
            vm.setOsType(os.type);
        }

        return vm;
    }

    private static BigDecimal getStatisticValueByName(String name, List<Statistic> statistics) {
        for (Statistic statistic : statistics) {
            if (name.equals(statistic.name)) {
                return new BigDecimal(statistic.values.value.get(0).datum);
            }
        }
        return BigDecimal.ZERO;
    }
}