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 java.math.BigInteger;
12 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
13 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
14 import org.opendaylight.openflowplugin.api.openflow.OpenflowPluginTimer;
15 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
16 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceReplyProcessor;
17 import org.opendaylight.openflowplugin.api.openflow.device.handlers.MessageHandler;
18 import org.opendaylight.openflowplugin.api.openflow.device.handlers.OutstandingMessageExtractor;
19 import org.opendaylight.openflowplugin.api.openflow.device.listener.OpenflowMessageListenerFacade;
20 import org.opendaylight.openflowplugin.api.openflow.flow.registry.FlowRegistry;
21 import org.opendaylight.openflowplugin.api.openflow.translator.TranslatorLibrarian;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableFeatures;
23 import org.opendaylight.yangtools.yang.binding.DataObject;
24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
27 * The central entity of OFP is the Device Context, which encapsulate the logical state of a switch
28 * as seen by the controller. Each OpenFlow session is tracked by a Connection Context.
29 * These attach to a particular Device Context in such a way, that there is at most one primary
30 * session associated with a Device Context. Whenever the controller needs to interact with a
31 * particular switch, it will do so in the context of the calling thread, obtaining a lock on
32 * the corresponding Device Context – thus the Device Context becomes the fine-grained point
33 * of synchronization. The only two entities allowed to send requests towards the switch are
34 * Statistics Manager and RPC Manager. Each of them allocates a Request Context for interacting
35 * with a particular Device Context. The Request Contexts are the basic units of fairness,
36 * which is enforced by keeping a cap on the number of outstanding requests a particular Request
37 * Context can have at any point in time. Should this quota be exceeded, any further attempt to make
38 * a request to the switch will fail immediately, with proper error indication.
40 * Created by Martin Bobak <mbobak@cisco.com> on 25.2.2015.
42 public interface DeviceContext extends OpenflowPluginTimer, MessageHandler, TranslatorLibrarian, OutstandingMessageExtractor, DeviceReplyProcessor {
46 * Method add auxiliary connection contexts to this context representing single device connection.
48 * @param connectionContext
50 void addAuxiliaryConenctionContext(ConnectionContext connectionContext);
53 * Method removes auxiliary connection context from this context representing single device connection.
55 * @param connectionContext
57 void removeAuxiliaryConenctionContext(ConnectionContext connectionContext);
61 * Method provides state of device represented by this device context.
63 * @return {@link DeviceState}
65 DeviceState getDeviceState();
68 * Method exposes possibility for write a child of {@link DataObject} to transaction for DataStore.
70 <T extends DataObject> void writeToTransaction(final LogicalDatastoreType store, final InstanceIdentifier<T> path, final T data);
73 * Method exposes transaction created for device
74 * represented by this context. This should be used as read only.
75 * This read only transaction has a fresh dataStore snapshot and
76 * here is a possibility to get different data set from DataStore
77 * as have a write transaction in this context.
79 ReadTransaction getReadTransaction();
82 * Method provides capabilities of connected device.
86 TableFeatures getCapabilities();
89 * Method provides current devices connection context.
93 ConnectionContext getPrimaryConnectionContext();
96 * Method provides current devices auxiliary connection contexts.
100 ConnectionContext getAuxiliaryConnectiobContexts(BigInteger cookie);
105 * Method writes request context into request context map. This method
106 * is ment to be used by {@link org.opendaylight.openflowplugin.impl.services.OFJResult2RequestCtxFuture#processResultFromOfJava}
109 * @param requestFutureContext
111 void hookRequestCtx(Xid xid, RequestContext requestFutureContext);
114 * Method that attaches anyMessageTypeListener to connection adapters as message listener.
116 * @param openflowMessageListenerFacade
118 void attachOpenflowMessageListener(OpenflowMessageListenerFacade openflowMessageListenerFacade);
120 OpenflowMessageListenerFacade getOpenflowMessageListenerFacade();
122 FlowRegistry getFlowRegistry();