| package org.onlab.onos.net.trivial.flow.impl; |
| |
| import org.onlab.onos.net.DeviceId; |
| import org.onlab.onos.net.flow.DefaultFlowRule; |
| import org.onlab.onos.net.flow.FlowRule; |
| import org.onlab.onos.net.flow.FlowRuleEvent; |
| |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Multimap; |
| |
| import static org.onlab.onos.net.flow.FlowRuleEvent.Type.*; |
| |
| /** |
| * Manages inventory of flow rules using trivial in-memory implementation. |
| */ |
| public class SimpleFlowRuleStore { |
| |
| // store entries as a pile of rules, no info about device tables |
| private final Multimap<DeviceId, FlowRule> flowEntries = HashMultimap.create(); |
| |
| /** |
| * Returns the flow entries associated with a device. |
| * |
| * @param deviceId the device ID |
| * @return the flow entries |
| */ |
| Iterable<FlowRule> getFlowEntries(DeviceId deviceId) { |
| return ImmutableSet.copyOf(flowEntries.get(deviceId)); |
| } |
| |
| /** |
| * Stores a new flow rule, and generates a FlowRule for it. |
| * |
| * @param rule the flow rule to add |
| * @return a flow entry |
| */ |
| FlowRule storeFlowRule(FlowRule rule) { |
| DeviceId did = rule.deviceId(); |
| FlowRule entry = new DefaultFlowRule(did, |
| rule.selector(), rule.treatment(), rule.priority()); |
| flowEntries.put(did, entry); |
| return entry; |
| } |
| |
| /** |
| * Stores a new flow rule, or updates an existing entry. |
| * |
| * @param rule the flow rule to add or update |
| * @return flow_added event, or null if just an update |
| */ |
| FlowRuleEvent addOrUpdateFlowRule(FlowRule rule) { |
| DeviceId did = rule.deviceId(); |
| |
| // check if this new rule is an update to an existing entry |
| for (FlowRule fe : flowEntries.get(did)) { |
| if (rule.equals(fe)) { |
| // TODO update the stats on this FlowRule? |
| return null; |
| } |
| } |
| flowEntries.put(did, rule); |
| return new FlowRuleEvent(RULE_ADDED, rule); |
| } |
| |
| /** |
| * |
| * @param rule the flow rule to remove |
| * @return flow_removed event, or null if nothing removed |
| */ |
| FlowRuleEvent removeFlowRule(FlowRule rule) { |
| |
| synchronized (this) { |
| if (flowEntries.remove(rule.deviceId(), rule)) { |
| return new FlowRuleEvent(RULE_REMOVED, rule); |
| } else { |
| return null; |
| } |
| } |
| } |
| |
| } |