2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.openflowplugin.api.openflow.device;
11 import io.netty.util.Timeout;
12 import java.math.BigInteger;
13 import org.opendaylight.controller.md.sal.binding.api.NotificationPublishService;
14 import org.opendaylight.controller.md.sal.binding.api.NotificationService;
15 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
17 import org.opendaylight.openflowplugin.api.openflow.OpenFlowPluginTimer;
18 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
19 import org.opendaylight.openflowplugin.api.openflow.connection.ThrottledConnectionsHolder;
20 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceContextClosedHandler;
21 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceDisconnectedHandler;
22 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceReplyProcessor;
23 import org.opendaylight.openflowplugin.api.openflow.device.handlers.MessageHandler;
24 import org.opendaylight.openflowplugin.api.openflow.device.handlers.OutstandingMessageExtractor;
25 import org.opendaylight.openflowplugin.api.openflow.device.listener.OpenflowMessageListenerFacade;
26 import org.opendaylight.openflowplugin.api.openflow.registry.flow.DeviceFlowRegistry;
27 import org.opendaylight.openflowplugin.api.openflow.registry.group.DeviceGroupRegistry;
28 import org.opendaylight.openflowplugin.api.openflow.registry.meter.DeviceMeterRegistry;
29 import org.opendaylight.openflowplugin.api.openflow.statistics.ofpspecific.MessageSpy;
30 import org.opendaylight.openflowplugin.api.openflow.translator.TranslatorLibrarian;
31 import org.opendaylight.yangtools.yang.binding.DataObject;
32 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
36 * The central entity of OFP is the Device Context, which encapsulate the logical state of a switch
37 * as seen by the controller. Each OpenFlow session is tracked by a Connection Context.
38 * These attach to a particular Device Context in such a way, that there is at most one primary
39 * session associated with a Device Context. Whenever the controller needs to interact with a
40 * particular switch, it will do so in the context of the calling thread, obtaining a lock on
41 * the corresponding Device Context – thus the Device Context becomes the fine-grained point
42 * of synchronization. The only two entities allowed to send requests towards the switch are
43 * Statistics Manager and RPC Manager. Each of them allocates a Request Context for interacting
44 * with a particular Device Context. The Request Contexts are the basic units of fairness,
45 * which is enforced by keeping a cap on the number of outstanding requests a particular Request
46 * Context can have at any point in time. Should this quota be exceeded, any further attempt to make
47 * a request to the switch will fail immediately, with proper error indication.
49 * Created by Martin Bobak <mbobak@cisco.com> on 25.2.2015.
51 public interface DeviceContext extends AutoCloseable,
55 OutstandingMessageExtractor,
57 DeviceDisconnectedHandler {
61 * Method add auxiliary connection contexts to this context representing single device connection.
63 * @param connectionContext
65 void addAuxiliaryConenctionContext(ConnectionContext connectionContext);
68 * Method removes auxiliary connection context from this context representing single device connection.
70 * @param connectionContext
72 void removeAuxiliaryConenctionContext(ConnectionContext connectionContext);
76 * Method provides state of device represented by this device context.
78 * @return {@link DeviceState}
80 DeviceState getDeviceState();
83 * Method creates put operation using provided data in underlying transaction chain.
85 <T extends DataObject> void writeToTransaction(final LogicalDatastoreType store, final InstanceIdentifier<T> path, final T data);
88 * Method creates delete operation for provided path in underlying transaction chain.
90 <T extends DataObject> void addDeleteToTxChain(final LogicalDatastoreType store, final InstanceIdentifier<T> path);
93 * Method exposes transaction created for device
94 * represented by this context. This read only transaction has a fresh dataStore snapshot.
95 * There is a possibility to get different data set from DataStore
96 * as write transaction in this context.
98 ReadTransaction getReadTransaction();
102 * Method provides current devices connection context.
106 ConnectionContext getPrimaryConnectionContext();
109 * Method provides current devices auxiliary connection contexts.
113 ConnectionContext getAuxiliaryConnectiobContexts(BigInteger cookie);
116 * Method generates unique XID value.
124 * @return request by xid
126 RequestContext lookupRequest(Xid xid);
129 * @return number of outstanding requests in map
131 int getNumberOfOutstandingRequests();
134 * Method writes request context into request context map. This method
135 * is ment to be used by org.opendaylight.openflowplugin.impl.services.OFJResult2RequestCtxFuture#processResultFromOfJava.
138 * @param requestFutureContext
140 void hookRequestCtx(Xid xid, RequestContext requestFutureContext);
143 * Method removes request context from request context map.
147 RequestContext unhookRequestCtx(Xid xid);
150 * Method that attaches anyMessageTypeListener to connection adapters as message listener.
152 * @param openflowMessageListenerFacade
154 void attachOpenflowMessageListener(OpenflowMessageListenerFacade openflowMessageListenerFacade);
157 * Method returns registered {@link org.opendaylight.openflowplugin.api.openflow.device.listener.OpenflowMessageListenerFacade}
161 OpenflowMessageListenerFacade getOpenflowMessageListenerFacade();
164 * Method exposes flow registry used for storing flow ids identified by calculated flow hash.
168 DeviceFlowRegistry getDeviceFlowRegistry();
171 * Method exposes device group registry used for storing group ids.
175 DeviceGroupRegistry getDeviceGroupRegistry();
178 * Method exposes device meter registry used for storing meter ids.
182 DeviceMeterRegistry getDeviceMeterRegistry();
186 * store cancellable timeout handler of currently running barrier task
188 void setCurrentBarrierTimeout(Timeout timeout);
191 * @return cancellable timeout handle of currently running barrier task
193 Timeout getBarrierTaskTimeout();
196 * Sets notification service
198 * @param notificationService
200 void setNotificationService(NotificationService notificationService);
202 void setNotificationPublishService(NotificationPublishService notificationPublishService);
204 MessageSpy getMessageSpy();
206 void setDeviceDisconnectedHandler(DeviceDisconnectedHandler deviceDisconnectedHandler);
209 * Method sets reference to handler used for cleanup after device context about to be closed.
211 void addDeviceContextClosedHandler(DeviceContextClosedHandler deviceContextClosedHandler);
213 void startGatheringOperationsToOneTransaction();
215 void commitOperationsGatheredInOneTransaction();