Enhance StatisticService to allow filtering by Application ID and Group ID
Resolve ONOS-205
Change-Id: Ie9318a5ade943bd8e47fb92ee856b7ebead5022e
diff --git a/core/net/src/main/java/org/onlab/onos/net/statistic/impl/StatisticManager.java b/core/net/src/main/java/org/onlab/onos/net/statistic/impl/StatisticManager.java
index 3bff3c5..fd4b741 100644
--- a/core/net/src/main/java/org/onlab/onos/net/statistic/impl/StatisticManager.java
+++ b/core/net/src/main/java/org/onlab/onos/net/statistic/impl/StatisticManager.java
@@ -15,12 +15,18 @@
*/
package org.onlab.onos.net.statistic.impl;
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Predicate;
+import com.google.common.collect.FluentIterable;
+import com.google.common.collect.ImmutableSet;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.core.ApplicationId;
+import org.onlab.onos.core.GroupId;
import org.onlab.onos.net.ConnectPoint;
import org.onlab.onos.net.Link;
import org.onlab.onos.net.Path;
@@ -35,8 +41,13 @@
import org.onlab.onos.net.statistic.StatisticService;
import org.onlab.onos.net.statistic.StatisticStore;
import org.slf4j.Logger;
+
+import java.util.Collections;
+import java.util.Objects;
+import java.util.Optional;
import java.util.Set;
+import static com.google.common.base.Preconditions.checkNotNull;
import static org.slf4j.LoggerFactory.getLogger;
/**
@@ -76,6 +87,25 @@
}
@Override
+ public Load load(Link link, ApplicationId appId, Optional<GroupId> groupId) {
+ Statistics stats = getStatistics(link.src());
+ if (!stats.isValid()) {
+ return new DefaultLoad();
+ }
+
+ ImmutableSet<FlowEntry> current = FluentIterable.from(stats.current())
+ .filter(hasApplicationId(appId))
+ .filter(hasGroupId(groupId))
+ .toSet();
+ ImmutableSet<FlowEntry> previous = FluentIterable.from(stats.previous())
+ .filter(hasApplicationId(appId))
+ .filter(hasGroupId(groupId))
+ .toSet();
+
+ return new DefaultLoad(aggregate(current), aggregate(previous));
+ }
+
+ @Override
public Load load(ConnectPoint connectPoint) {
return loadInternal(connectPoint);
}
@@ -131,22 +161,64 @@
}
private Load loadInternal(ConnectPoint connectPoint) {
+ Statistics stats = getStatistics(connectPoint);
+ if (!stats.isValid()) {
+ return new DefaultLoad();
+ }
+
+ return new DefaultLoad(aggregate(stats.current), aggregate(stats.previous));
+ }
+
+ /**
+ * Returns statistics of the specified port.
+ *
+ * @param connectPoint port to query
+ * @return statistics
+ */
+ private Statistics getStatistics(ConnectPoint connectPoint) {
Set<FlowEntry> current;
Set<FlowEntry> previous;
synchronized (statisticStore) {
- current = statisticStore.getCurrentStatistic(connectPoint);
- previous = statisticStore.getPreviousStatistic(connectPoint);
+ current = getCurrentStatistic(connectPoint);
+ previous = getPreviousStatistic(connectPoint);
}
- if (current == null || previous == null) {
- return new DefaultLoad();
- }
- long currentAggregate = aggregate(current);
- long previousAggregate = aggregate(previous);
- return new DefaultLoad(currentAggregate, previousAggregate);
+ return new Statistics(current, previous);
}
/**
+ * Returns the current statistic of the specified port.
+
+ * @param connectPoint port to query
+ * @return set of flow entries
+ */
+ private Set<FlowEntry> getCurrentStatistic(ConnectPoint connectPoint) {
+ Set<FlowEntry> stats = statisticStore.getCurrentStatistic(connectPoint);
+ if (stats == null) {
+ return Collections.emptySet();
+ } else {
+ return stats;
+ }
+ }
+
+ /**
+ * Returns the previous statistic of the specified port.
+ *
+ * @param connectPoint port to query
+ * @return set of flow entries
+ */
+ private Set<FlowEntry> getPreviousStatistic(ConnectPoint connectPoint) {
+ Set<FlowEntry> stats = statisticStore.getCurrentStatistic(connectPoint);
+ if (stats == null) {
+ return Collections.emptySet();
+ } else {
+ return stats;
+ }
+ }
+
+ // TODO: make aggregation function generic by passing a function
+ // (applying Java 8 Stream API?)
+ /**
* Aggregates a set of values.
* @param values the values to aggregate
* @return a long value
@@ -188,5 +260,105 @@
}
}
+ /**
+ * Internal data class holding two set of flow entries.
+ */
+ private static class Statistics {
+ private final ImmutableSet<FlowEntry> current;
+ private final ImmutableSet<FlowEntry> previous;
+ public Statistics(Set<FlowEntry> current, Set<FlowEntry> previous) {
+ this.current = ImmutableSet.copyOf(checkNotNull(current));
+ this.previous = ImmutableSet.copyOf(checkNotNull(previous));
+ }
+
+ /**
+ * Returns flow entries as the current value.
+ *
+ * @return flow entries as the current value
+ */
+ public ImmutableSet<FlowEntry> current() {
+ return current;
+ }
+
+ /**
+ * Returns flow entries as the previous value.
+ *
+ * @return flow entries as the previous value
+ */
+ public ImmutableSet<FlowEntry> previous() {
+ return previous;
+ }
+
+ /**
+ * Validates values are not empty.
+ *
+ * @return false if either of the sets is empty. Otherwise, true.
+ */
+ public boolean isValid() {
+ return !(current.isEmpty() || previous.isEmpty());
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(current, previous);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (!(obj instanceof Statistics)) {
+ return false;
+ }
+ final Statistics other = (Statistics) obj;
+ return Objects.equals(this.current, other.current) && Objects.equals(this.previous, other.previous);
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(this)
+ .add("current", current)
+ .add("previous", previous)
+ .toString();
+ }
+ }
+
+ /**
+ * Creates a predicate that checks the application ID of a flow entry is the same as
+ * the specified application ID.
+ *
+ * @param appId application ID to be checked
+ * @return predicate
+ */
+ private static Predicate<FlowEntry> hasApplicationId(ApplicationId appId) {
+ return new Predicate<FlowEntry>() {
+ @Override
+ public boolean apply(FlowEntry flowEntry) {
+ return flowEntry.appId() == appId.id();
+ }
+ };
+ }
+
+ /**
+ * Create a predicate that checks the group ID of a flow entry is the same as
+ * the specified group ID.
+ *
+ * @param groupId group ID to be checked
+ * @return predicate
+ */
+ private static Predicate<FlowEntry> hasGroupId(Optional<GroupId> groupId) {
+ return new Predicate<FlowEntry>() {
+ @Override
+ public boolean apply(FlowEntry flowEntry) {
+ if (!groupId.isPresent()) {
+ return false;
+ }
+ // FIXME: The left hand type and right hand type don't match
+ // FlowEntry.groupId() still returns a short value, not int.
+ return flowEntry.groupId() == groupId.get().id();
+ }
+ };
+ }
}