| package net.onrc.onos.core.flowmanager; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.HashSet; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| |
| import net.onrc.onos.api.flowmanager.Flow; |
| import net.onrc.onos.api.flowmanager.FlowId; |
| import net.onrc.onos.api.flowmanager.FlowState; |
| import net.onrc.onos.core.datagrid.ISharedCollectionsService; |
| import net.onrc.onos.core.util.serializers.KryoFactory; |
| |
| import com.hazelcast.core.IMap; |
| |
| /** |
| * Manages the distributed shared flow map. |
| */ |
| class SharedFlowMap implements FlowMap { |
| private static final String FLOWMAP_NAME = "flow_map"; |
| private static final String FLOWSTATEMAP_NAME = "flowstate_map"; |
| |
| private final IMap<String, byte[]> flowMap; |
| private final IMap<String, byte[]> flowStateMap; |
| private final SharedFlowMapEventDispatcher dispatcher; |
| |
| /** |
| * Creates instance using {@link ISharedCollectionsService} service. |
| * |
| * @param service the {@link ISharedCollectionsService} service |
| */ |
| SharedFlowMap(ISharedCollectionsService service) { |
| this.flowMap = checkNotNull(service.getConcurrentMap( |
| FLOWMAP_NAME, String.class, byte[].class)); |
| this.flowStateMap = checkNotNull(service.getConcurrentMap( |
| FLOWSTATEMAP_NAME, String.class, byte[].class)); |
| this.dispatcher = new SharedFlowMapEventDispatcher(flowMap, flowStateMap); |
| } |
| |
| @Override |
| public Flow get(FlowId id) { |
| byte[] buf = flowMap.get(checkNotNull(id).toString()); |
| if (buf == null) { |
| return null; |
| } |
| return KryoFactory.deserialize(buf); |
| } |
| |
| @Override |
| public boolean put(Flow flow) { |
| checkNotNull(flow); |
| byte[] buf = KryoFactory.serialize(flow); |
| flowMap.set(flow.getId().toString(), buf); |
| return true; |
| } |
| |
| @Override |
| public Flow remove(FlowId id) { |
| String flowIdStr = checkNotNull(id).toString(); |
| byte[] buf = flowMap.remove(flowIdStr); |
| if (buf == null) { |
| return null; |
| } |
| flowStateMap.remove(flowIdStr); |
| return KryoFactory.deserialize(buf); |
| } |
| |
| @Override |
| public Set<Flow> getAll() { |
| Set<Flow> flows = new HashSet<>(); |
| for (Entry<String, byte[]> entry : flowMap.entrySet()) { |
| flows.add((Flow) KryoFactory.deserialize(entry.getValue())); |
| } |
| return flows; |
| } |
| |
| @Override |
| public boolean setState(FlowId id, FlowState state, FlowState expectedState) { |
| final String key = checkNotNull(id, "FlowId is not specified.").toString(); |
| final byte[] oldValue = KryoFactory.serialize(expectedState); |
| final byte[] newValue = KryoFactory.serialize(state); |
| |
| if (!flowMap.containsKey(key)) { |
| return false; |
| } |
| |
| if (expectedState == FlowState.SUBMITTED) { |
| // The absence of the key means SUBMITTED state. |
| return flowStateMap.putIfAbsent(key, newValue) == null; |
| } |
| |
| return flowStateMap.replace(key, oldValue, newValue); |
| }; |
| |
| @Override |
| public FlowState getState(FlowId id) { |
| final String key = checkNotNull(id, "FlowId is not specified.").toString(); |
| if (!flowMap.containsKey(key)) { |
| return null; |
| } |
| |
| final byte[] buf = flowStateMap.get(key); |
| if (buf == null) { |
| // The absence of the key means SUBMITTED state. |
| return FlowState.SUBMITTED; |
| } |
| return KryoFactory.deserialize(buf); |
| } |
| |
| @Override |
| public void addListener(FlowMapEventListener listener) { |
| dispatcher.addListener(listener); |
| } |
| |
| @Override |
| public void removeListener(FlowMapEventListener listener) { |
| dispatcher.removeListener(listener); |
| } |
| } |