How to use

getScalar

method

in

org.apache.mesos.v1.Protos$Resource

public static List<Resource> combineResources(List<List<Resource>> resourcesList) {
 List<Resource> resources = new ArrayList<>();
 for (List<Resource> resourcesToAdd : resourcesList) {
  for (Resource resource : resourcesToAdd) {
   Optional<Resource> matched = getMatchingResource(resource, resources);
   if (!matched.isPresent()) {
    resources.add(resource);
   } else {
    int index = resources.indexOf(matched.get());
    Resource.Builder resourceBuilder = resource.toBuilder().clone();
    if (resource.hasScalar()) {
     resourceBuilder.setScalar(resource.toBuilder().getScalarBuilder().setValue(resource.getScalar().getValue() + matched.get().getScalar().getValue()).build());
     resources.set(index, resourceBuilder.build());
    } else if (resource.hasRanges()) {
     Ranges.Builder newRanges = Ranges.newBuilder();
     resource.getRanges().getRangeList().forEach(newRanges::addRange);
     matched.get().getRanges().getRangeList().forEach(newRanges::addRange);
     resourceBuilder.setRanges(newRanges);
     resources.set(index, resourceBuilder.build());
    } else {
     throw new IllegalStateException(String.format("Can't subtract non-scalar or range resources %s", formatForLogging(resource)));
    }
   }
  }
 }
 return resources;
}

public static List<Resource> subtractResources(List<Resource> resources, List<Resource> subtract) {
 List<Resource> remaining = Lists.newArrayListWithCapacity(resources.size());
 for (Resource resource : resources) {
  Optional<Resource> matched = getMatchingResource(resource, subtract);
  if (!matched.isPresent()) {
   remaining.add(resource.toBuilder().clone().build());
  } else {
   Resource.Builder resourceBuilder = resource.toBuilder().clone();
   if (resource.hasScalar()) {
    resourceBuilder.setScalar(resource.toBuilder().getScalarBuilder().setValue(resource.getScalar().getValue() - matched.get().getScalar().getValue()).build());
   } else if (resource.hasRanges()) {
    resourceBuilder.setRanges(subtractRanges(resource.getRanges(), matched.get().getRanges()));
   } else {
    throw new IllegalStateException(String.format("Can't subtract non-scalar or range resources %s", formatForLogging(resource)));
   }
   remaining.add(resourceBuilder.build());
  }
 }
 return remaining;
}

double availableCpu = cpus.getScalar().getValue();
double availableMem = mem.getScalar().getValue();
final double cpusPerTask = state.getCpusPerTask();
final double memMbPerTask = state.getMemMbPerTask();

public static List<Resource> combineResources(List<List<Resource>> resourcesList) {
 List<Resource> resources = new ArrayList<>();
 for (List<Resource> resourcesToAdd : resourcesList) {
  for (Resource resource : resourcesToAdd) {
   Optional<Resource> matched = getMatchingResource(resource, resources);
   if (!matched.isPresent()) {
    resources.add(resource);
   } else {
    int index = resources.indexOf(matched.get());
    Resource.Builder resourceBuilder = resource.toBuilder().clone();
    if (resource.hasScalar()) {
     resourceBuilder.setScalar(resource.toBuilder().getScalarBuilder().setValue(resource.getScalar().getValue() + matched.get().getScalar().getValue()).build());
     resources.set(index, resourceBuilder.build());
    } else if (resource.hasRanges()) {
     Ranges.Builder newRanges = Ranges.newBuilder();
     resource.getRanges().getRangeList().forEach(newRanges::addRange);
     matched.get().getRanges().getRangeList().forEach(newRanges::addRange);
     resourceBuilder.setRanges(newRanges);
     resources.set(index, resourceBuilder.build());
    } else {
     throw new IllegalStateException(String.format("Can't subtract non-scalar or range resources %s", formatForLogging(resource)));
    }
   }
  }
 }
 return resources;
}

public static List<Resource> subtractResources(List<Resource> resources, List<Resource> subtract) {
 List<Resource> remaining = Lists.newArrayListWithCapacity(resources.size());
 for (Resource resource : resources) {
  Optional<Resource> matched = getMatchingResource(resource, subtract);
  if (!matched.isPresent()) {
   remaining.add(resource.toBuilder().clone().build());
  } else {
   Resource.Builder resourceBuilder = resource.toBuilder().clone();
   if (resource.hasScalar()) {
    resourceBuilder.setScalar(resource.toBuilder().getScalarBuilder().setValue(resource.getScalar().getValue() - matched.get().getScalar().getValue()).build());
   } else if (resource.hasRanges()) {
    resourceBuilder.setRanges(subtractRanges(resource.getRanges(), matched.get().getRanges()));
   } else {
    throw new IllegalStateException(String.format("Can't subtract non-scalar or range resources %s", formatForLogging(resource)));
   }
   remaining.add(resourceBuilder.build());
  }
 }
 return remaining;
}

private static double getScalar(Resource r) {
 return r.getScalar().getValue();
}

private static double getScalar(Resource r) {
 return r.getScalar().getValue();
}