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.md.sal.common.api.data.TransactionChain;
12 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
13 import org.opendaylight.openflowplugin.api.openflow.device.handlers.MessageHandler;
14 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
15 import org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableFeatures;
17 import java.math.BigInteger;
19 import org.opendaylight.yangtools.yang.binding.DataObject;
20 import org.opendaylight.yangtools.yang.common.RpcResult;
22 import com.google.common.util.concurrent.SettableFuture;
24 import java.util.Collection;
26 import java.util.concurrent.Future;
29 * The central entity of OFP is the Device Context, which encapsulate the logical state of a switch
30 * as seen by the controller. Each OpenFlow session is tracked by a Connection Context.
31 * These attach to a particular Device Context in such a way, that there is at most one primary
32 * session associated with a Device Context. Whenever the controller needs to interact with a
33 * particular switch, it will do so in the context of the calling thread, obtaining a lock on
34 * the corresponding Device Context – thus the Device Context becomes the fine-grained point
35 * of synchronization. The only two entities allowed to send requests towards the switch are
36 * Statistics Manager and RPC Manager. Each of them allocates a Request Context for interacting
37 * with a particular Device Context. The Request Contexts are the basic units of fairness,
38 * which is enforced by keeping a cap on the number of outstanding requests a particular Request
39 * Context can have at any point in time. Should this quota be exceeded, any further attempt to make
40 * a request to the switch will fail immediately, with proper error indication.
42 * Created by Martin Bobak <mbobak@cisco.com> on 25.2.2015.
44 public interface DeviceContext extends MessageHandler {
48 * Method add auxiliary connection contexts to this context representing single device connection.
50 * @param connectionContext
52 void addAuxiliaryConenctionContext(ConnectionContext connectionContext);
55 * Method removes auxiliary connection context from this context representing single device connection.
57 * @param connectionContext
59 void removeAuxiliaryConenctionContext(ConnectionContext connectionContext);
63 * Method provides state of device represented by this device context.
65 * @return {@link DeviceState}
67 DeviceState getDeviceState();
70 * Method sets transaction chain used for all data store operations on device
71 * represented by this context. This transaction chain is write only.
73 * @param transactionChain
75 void setTransactionChain(TransactionChain transactionChain);
78 * Method exposes transaction created for device
79 * represented by this context. This should be used as write only.
81 TransactionChain getTransactionChain();
84 * Method provides capabilities of connected device.
88 TableFeatures getCapabilities();
91 * Method provides current devices connection context.
95 ConnectionContext getPrimaryConnectionContext();
98 * Method provides current devices auxiliary connection contexts.
102 ConnectionContext getAuxiliaryConnectiobContexts(BigInteger cookie);
106 <T extends DataObject> Future<RpcResult<T>> sendRequest(Xid xid);
109 * Method provides requests map
112 public Map<Xid, RequestFutureContext> getRequests();
115 * Method writes request context into request context map
117 * @param requestFutureContext
119 public void hookRequestCtx(Xid xid, RequestFutureContext requestFutureContext);
122 * Method that set future to context in Map
126 public void processReply(Xid xid, OfHeader ofHeader);