| package org.onlab.onos.net.statistic; |
| |
| import com.google.common.base.MoreObjects; |
| import org.onlab.onos.net.flow.FlowRuleProvider; |
| |
| /** |
| * Implementation of a load. |
| */ |
| public class DefaultLoad implements Load { |
| |
| private final boolean isValid; |
| private final long current; |
| private final long previous; |
| private final long time; |
| |
| /** |
| * Creates an invalid load. |
| */ |
| public DefaultLoad() { |
| this.isValid = false; |
| this.time = System.currentTimeMillis(); |
| this.current = -1; |
| this.previous = -1; |
| } |
| |
| /** |
| * Creates a load value from the parameters. |
| * @param current the current value |
| * @param previous the previous value |
| */ |
| public DefaultLoad(long current, long previous) { |
| this.current = current; |
| this.previous = previous; |
| this.time = System.currentTimeMillis(); |
| this.isValid = true; |
| } |
| |
| @Override |
| public long rate() { |
| return (current - previous) / FlowRuleProvider.POLL_INTERVAL; |
| } |
| |
| @Override |
| public long latest() { |
| return current; |
| } |
| |
| @Override |
| public boolean isValid() { |
| return isValid; |
| } |
| |
| @Override |
| public long time() { |
| return time; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("Load").add("rate", rate()) |
| .add("latest", latest()).toString(); |
| |
| } |
| } |