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 org.opendaylight.controller.sal.binding.api.NotificationProviderService;
13 import io.netty.util.Timeout;
14 import java.math.BigInteger;
16 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
18 import org.opendaylight.openflowplugin.api.openflow.OpenflowPluginTimer;
19 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
20 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceReplyProcessor;
21 import org.opendaylight.openflowplugin.api.openflow.device.handlers.MessageHandler;
22 import org.opendaylight.openflowplugin.api.openflow.device.handlers.OutstandingMessageExtractor;
23 import org.opendaylight.openflowplugin.api.openflow.device.listener.OpenflowMessageListenerFacade;
24 import org.opendaylight.openflowplugin.api.openflow.registry.flow.DeviceFlowRegistry;
25 import org.opendaylight.openflowplugin.api.openflow.registry.group.DeviceGroupRegistry;
26 import org.opendaylight.openflowplugin.api.openflow.registry.meter.DeviceMeterRegistry;
27 import org.opendaylight.openflowplugin.api.openflow.translator.TranslatorLibrarian;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableFeatures;
29 import org.opendaylight.yangtools.yang.binding.DataObject;
30 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
33 * The central entity of OFP is the Device Context, which encapsulate the logical state of a switch
34 * as seen by the controller. Each OpenFlow session is tracked by a Connection Context.
35 * These attach to a particular Device Context in such a way, that there is at most one primary
36 * session associated with a Device Context. Whenever the controller needs to interact with a
37 * particular switch, it will do so in the context of the calling thread, obtaining a lock on
38 * the corresponding Device Context – thus the Device Context becomes the fine-grained point
39 * of synchronization. The only two entities allowed to send requests towards the switch are
40 * Statistics Manager and RPC Manager. Each of them allocates a Request Context for interacting
41 * with a particular Device Context. The Request Contexts are the basic units of fairness,
42 * which is enforced by keeping a cap on the number of outstanding requests a particular Request
43 * Context can have at any point in time. Should this quota be exceeded, any further attempt to make
44 * a request to the switch will fail immediately, with proper error indication.
46 * Created by Martin Bobak <mbobak@cisco.com> on 25.2.2015.
48 public interface DeviceContext extends OpenflowPluginTimer, MessageHandler, TranslatorLibrarian, OutstandingMessageExtractor, DeviceReplyProcessor {
52 * Method add auxiliary connection contexts to this context representing single device connection.
54 * @param connectionContext
56 void addAuxiliaryConenctionContext(ConnectionContext connectionContext);
59 * Method removes auxiliary connection context from this context representing single device connection.
61 * @param connectionContext
63 void removeAuxiliaryConenctionContext(ConnectionContext connectionContext);
67 * Method provides state of device represented by this device context.
69 * @return {@link DeviceState}
71 DeviceState getDeviceState();
74 * Method creates put operation using provided data in underlying transaction chain.
76 <T extends DataObject> void writeToTransaction(final LogicalDatastoreType store, final InstanceIdentifier<T> path, final T data);
79 * Method creates delete operation for provided path in underlying transaction chain.
81 <T extends DataObject> void addDeleteToTxChain(final LogicalDatastoreType store, final InstanceIdentifier<T> path);
84 * Method exposes transaction created for device
85 * represented by this context. This read only transaction has a fresh dataStore snapshot.
86 * There is a possibility to get different data set from DataStore
87 * as write transaction in this context.
89 ReadTransaction getReadTransaction();
93 * Method provides capabilities of connected device.
97 TableFeatures getCapabilities();
100 * Method provides current devices connection context.
104 ConnectionContext getPrimaryConnectionContext();
107 * Method provides current devices auxiliary connection contexts.
111 ConnectionContext getAuxiliaryConnectiobContexts(BigInteger cookie);
114 * Method generates unique XID value.
120 * @return readonly map of outstanding requests
122 Map<Long, RequestContext> getRequests();
125 * Method writes request context into request context map. This method
126 * is ment to be used by {@link org.opendaylight.openflowplugin.impl.services.OFJResult2RequestCtxFuture#processResultFromOfJava}
129 * @param requestFutureContext
131 void hookRequestCtx(Xid xid, RequestContext requestFutureContext);
134 * Method that attaches anyMessageTypeListener to connection adapters as message listener.
136 * @param openflowMessageListenerFacade
138 void attachOpenflowMessageListener(OpenflowMessageListenerFacade openflowMessageListenerFacade);
141 * Method returns registered {@link org.opendaylight.openflowplugin.api.openflow.device.listener.OpenflowMessageListenerFacade}
144 OpenflowMessageListenerFacade getOpenflowMessageListenerFacade();
147 * Method exposes flow registry used for storing flow ids identified by calculated flow hash.
150 DeviceFlowRegistry getDeviceFlowRegistry();
152 * Method exposes device group registry used for storing group ids.
155 DeviceGroupRegistry getDeviceGroupRegistry();
157 * Method exposes device meter registry used for storing meter ids.
160 DeviceMeterRegistry getDeviceMeterRegistry();
165 * store cancellable timeout handler of currently running barrier task
167 void setCurrentBarrierTimeout(Timeout timeout);
170 * @return cancellable timeout handle of currently running barrier task
172 Timeout getBarrierTaskTimeout();
175 * Sets notification service
176 * @param notificationService
178 void setNotificationService(NotificationProviderService notificationService);