org.apache.storm.scheduler.resource.normalization

Class ResourceMapArrayBridge

java.lang.Object

org.apache.storm.scheduler.resource.normalization.ResourceMapArrayBridge

public class ResourceMapArrayBridge
extends Object

Provides translation between normalized resource maps and resource value arrays. Some operations use resource value arrays instead of the full normalized resource map as an optimization. See NormalizedResources.

Constructor Summary

Constructors

Constructor and Description
ResourceMapArrayBridge()

Method Summary

Modifier and Type	Method and Description
double[]	empty() Create an array that has all values 0.
Map<String,Integer>	getResourceNamesToArrayIndex()
Map<String,Double>	translateFromResourceArray(double[] resources) Translates an array of resource values to a normalized resource map.
double[]	translateToResourceArray(Map<String,Double> normalizedResources) Translates a normalized resource map to an array of resource values.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ResourceMapArrayBridge

public ResourceMapArrayBridge()

Method Detail

translateToResourceArray

public double[] translateToResourceArray(Map<String,Double> normalizedResources)

Translates a normalized resource map to an array of resource values. Each resource name will be assigned an index in the array, which is guaranteed to be consistent with subsequent invocations of this method. Note that CPU and memory resources are not translated by this method, as they are expected to be captured elsewhere.

Parameters:

normalizedResources - The resources to translate to an array

Returns:

The array of resource values

empty

public double[] empty()

Create an array that has all values 0.

Returns:

the empty array.

translateFromResourceArray

public Map<String,Double> translateFromResourceArray(double[] resources)

Translates an array of resource values to a normalized resource map.

Parameters:

resources - The resource array to translate

Returns:

The normalized resource map

getResourceNamesToArrayIndex

public Map<String,Integer> getResourceNamesToArrayIndex()