source: source/ariba/Node.h@ 12768

Last change on this file since 12768 was 12350, checked in by s_taenzer@…, 11 years ago

Logging: Properly enable logging with Log4Cxx in Node

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1// [License]
2// The Ariba-Underlay Copyright
3//
4// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
5//
6// Institute of Telematics
7// UniversitÀt Karlsruhe (TH)
8// Zirkel 2, 76128 Karlsruhe
9// Germany
10//
11// Redistribution and use in source and binary forms, with or without
12// modification, are permitted provided that the following conditions are
13// met:
14//
15// 1. Redistributions of source code must retain the above copyright
16// notice, this list of conditions and the following disclaimer.
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
22// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OF TELEMATICS OR
25// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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29// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33// The views and conclusions contained in the software and documentation
34// are those of the authors and should not be interpreted as representing
35// official policies, either expressed or implied, of the Institute of
36// Telematics.
37// [License]
38
39#ifndef NODE_H_
40#define NODE_H_
41
42// forward declarations
43namespace ariba {
44 class Node;
45 namespace communication {
46 class BaseCommunication;
47 }
48 namespace overlay {
49 class BaseOverlay;
50 }
51}
52
53#include <vector>
54#include <iostream>
55#include <exception>
56
57#include "Module.h"
58#include "Identifiers.h"
59#include "SpoVNetProperties.h"
60#include "NodeListener.h"
61#include "Name.h"
62//#include "AribaModule.h"
63#include "CommunicationListener.h"
64#include "DataMessage.h"
65#include "SideportListener.h"
66#include "ariba/overlay/SequenceNumber.h"
67#include "ariba/utility/logging/Logging.h"
68
69// reboost messages
70#include "ariba/utility/transport/messages/message.hpp"
71
72#include <boost/property_tree/ptree.hpp>
73
74using std::vector;
75using ariba::overlay::BaseOverlay;
76
77namespace ariba {
78
79// typedef ariba::overlay::SequenceNumber SequenceNumber; // XXX see CommunicationListener
80
81using boost::property_tree::ptree;
82
83// sendMessage-Priorities
84struct send_priority
85{
86 enum SEND_PRIORITY
87 {
88 HIGHEST = 2,
89 HIGHER = 3,
90 NORMAL = 4,
91 LOWER = 5,
92 LOWEST = 6
93 };
94};
95
96
97
98/**
99 * \addtogroup public
100 * @{
101 *
102 * This class should implement all ariba node functionality.
103 *
104 * @author Sebastian Mies <mies@tm.uka.de>
105 * @author Christoph Mayer <mayer@tm.uka.de>
106 */
107// TODO do we really want to inherit from Module.. ?
108class Node: public Module {
109 use_logging_h(Node);
110public:
111
112 /**
113 * Constructs a new node using a given ariba module
114 *
115 * @param ariba_mod The ariba module
116 * @param name The canonical node name of the new node. When NULL a
117 * randomly chosen name is created.
118 * @param len The length of the canonical node name or -1, if the name
119 * is a zero-terminated char-string.
120 */
121// Node(AribaModule& ariba_mod, const Name& node_name = Name::UNSPECIFIED);
122
123 // XXX EXPERIMENTAL
124 Node();
125
126 /**
127 * Destroys the node. Before destruction some pre-conditions
128 * must be met:<br />
129 *
130 * 1. The node is not part of any SpoVNet <br />
131 * 2. All listeners must be unbound from this node <br />
132 * 3. The module has been stopped<br />
133 */
134 virtual ~Node();
135
136 //--- node control ---
137
138 /**
139 * XXX EXPERIMENTAL
140 *
141 * Replaces initialte & join
142 */
143 void connect(const ptree& config);
144
145 // XXX DEPRECATED
146 /**
147 * This method instructs the node to join a particular spovnet.
148 * Callees may bind with a NodeListener to receive events, when
149 * a node has been successfully joined.
150 *
151 * @param vnetId The SpoVNet name
152 */
153// void join(const Name& name);
154
155 /**
156 * This method initiates a new SpoVNet with the given SpoVNetID and
157 * parameters.
158 *
159 * @param name The SpoVNet name
160 * @param param The SpoVNet properties
161 */
162// void initiate(const Name& name, const SpoVNetProperties& parm =
163// SpoVNetProperties::DEFAULT);
164
165 /**
166 * This method initiates the leave procedure of this node.
167 */
168 void leave();
169
170 /**
171 * This method is used to bind a node listener to this node.
172 *
173 * @param listener The node listener
174 * @return boolean indicating success of failure
175 */
176 bool bind(NodeListener* listener);
177
178 /**
179 * This method is used to unbind a node listener to this node.
180 *
181 * @param listener The node listener
182 * @return boolean indicating success of failure
183 */
184 bool unbind(NodeListener* listener);
185
186 //--- spovnet properties ---
187
188 /**
189 * Returns the properties of the spovnet the node has joined.
190 *
191 * @return The properties of the spovnet the node has joined
192 */
193 const SpoVNetProperties& getSpoVNetProperties() const;
194
195 /**
196 * Returns the spovnet identifier
197 *
198 * @return The spovnet idenfifier
199 */
200 const SpoVNetID& getSpoVNetId() const;
201
202 /**
203 * Returns true, if the node is part of a spovnet.
204 *
205 * @return True, if the node is part of a spovnet
206 */
207 bool isJoined() const;
208
209 //--- addressing ---
210
211 /**
212 * Returns the node id of this node if the link id is unspecified or
213 * the node id of the remote node.
214 *
215 * @return The local or the remote node identifier
216 */
217 const NodeID& getNodeId(const LinkID& lid = LinkID::UNSPECIFIED) const;
218
219 /**
220 * Returns the node id to a node name according to the currently joined
221 * spovnet (usually derives a node identifier by hashing the name).
222 *
223 * @return The node identifier to the given name
224 */
225 NodeID generateNodeId(const Name& name) const;
226
227 /**
228 * Returns the name of this node if the link id is unspecified or
229 * the node name of the remote node, if known -- otherwise it returns
230 * an unspecified name.
231 *
232 * @return A node's name or an unspecified name, if unknown
233 */
234 const Name getNodeName(const LinkID& lid = LinkID::UNSPECIFIED) const;
235
236 /**
237 * Get a list of neighboring nodes in the overlay structure.
238 * The number and identities of nodes depends highly on the
239 * used overlay structure.
240 *
241 * @return a list of NodeIDs that are neighbors in the overlay structure
242 * @see sendBroadcastMessage
243 */
244 vector<NodeID> getNeighborNodes() const;
245
246 //--- communication ---
247
248 /**
249 * Establishes a new link to another node and service with the given
250 * link properties. An optional message could be sent with the request.
251 *
252 * @param nid The remote node identifier
253 * @param sid The remote service identifier
254 * @param req The required link properties
255 * @param msg An optional message that is sent with the request
256 * @return A new link id
257 */
258 LinkID establishLink(const NodeID& nid, const ServiceID& sid);
259
260 /**
261 * This method drops an established link.
262 *
263 * @param lnk The link identifier of an active link
264 */
265 void dropLink(const LinkID& lnk);
266
267 /**
268 * Returns whether a link is direct or relayed over other nodes
269 * @param lnk LinkID of the link
270 * @return true if link is direct; false otherwise
271 */
272 bool isLinkDirect(const ariba::LinkID& lnk) const;
273
274 /**
275 * Returns the latest measured hop count on this link.
276 * NOTE: This is not guaranteed to be up to date.
277 *
278 * @param lnk LinkID of the link
279 * @return overlay hop count on this link
280 */
281 int getHopCount(const ariba::LinkID& lnk) const;
282
283
284 /* +++++ Message sending +++++ */
285
286
287 /**
288 * Sends a message via an established link. If reliable transport was
289 * selected, the method returns a sequence number and a communication event
290 * is triggered on message delivery or loss.
291 *
292 * +++ New interface, using efficient zero-copy reboost messages. +++
293 *
294 * @param msg The message to be sent
295 * @param lnk The link to be used for sending the message
296 */
297 const SequenceNumber& sendMessage(reboost::message_t msg, const LinkID& lnk, uint8_t priority=send_priority::NORMAL);
298
299 /**
300 * +++ Legacy interface, converts old ariba messages into new reboost messages. +++
301 */
302 seqnum_t sendMessage(const DataMessage& msg, const LinkID& lnk);
303
304
305 /**
306 * Sends a one-shot message to a service. If link properties are specified,
307 * the node tries to fulfill those requirements. This may cause the node
308 * to first establish a temporary link, second sending the message and last
309 * dropping the link. This would result in a small amount of extra latency
310 * until the message is delivered. If reliable transport was selected,
311 * the method returns a sequence number and a communication event is
312 * triggered on message delivery or loss.
313 *
314 * +++ New interface, using efficient zero-copy reboost messages. +++
315 *
316 * @param msg The message to be sent
317 * @param nid The remote node identifier
318 * @param sid The remote service identifier
319 * @param req The requirements associated with the message
320 * @return A sequence number
321 */
322 const SequenceNumber& sendMessage(reboost::message_t msg, const NodeID& nid, const ServiceID& sid,
323 uint8_t priority=send_priority::NORMAL, const LinkProperties& req = LinkProperties::DEFAULT);
324
325 /**
326 * +++ Legacy interface, converts old ariba messages into new reboost messages. +++
327 */
328 seqnum_t sendMessage(const DataMessage& msg, const NodeID& nid, const ServiceID& sid,
329 const LinkProperties& req = LinkProperties::DEFAULT);
330
331
332 /**
333 * like the above function, but sends the message to the closest directly known node
334 * to the specified address
335 *
336 * +++ New interface, using efficient zero-copy reboost messages. +++
337 *
338 */
339 NodeID sendMessageCloserToNodeID(reboost::message_t msg, const NodeID& nid, const ServiceID& sid,
340 uint8_t priority=send_priority::NORMAL, const LinkProperties& req = LinkProperties::DEFAULT);
341
342 /**
343 * +++ Legacy interface, converts old ariba messages into new reboost messages. +++
344 */
345 NodeID sendMessageCloserToNodeID(const DataMessage& msg, const NodeID& nid, const ServiceID& sid,
346 const LinkProperties& req = LinkProperties::DEFAULT);
347
348
349 /**
350 * Sends a message to all known hosts in the overlay structure
351 * the nodes that are reached here depend on the overlay structure.
352 *
353 * +++ New interface, using efficient zero-copy reboost messages. +++
354 *
355 * @param msg The message to be send
356 * @param sid The id of the service that should receive the message
357 * @see getNeighborNodes
358 */
359 void sendBroadcastMessage(reboost::message_t msg, const ServiceID& sid, uint8_t priority=send_priority::NORMAL);
360
361 /**
362 * +++ Legacy interface, converts old ariba messages into new reboost messages. +++
363 */
364 void sendBroadcastMessage(const DataMessage& msg, const ServiceID& sid);
365
366
367 /* +++++ [Message sending] +++++ */
368
369
370
371 // --- communication listeners ---
372
373 /**
374 * Binds a listener to a specifed service identifier.
375 * Whenever a link is established/dropped or messages are received the
376 * events inside the interface are called.
377 *
378 * @param listener The listener to be registered
379 * @param sid The service identifier
380 * @return boolean indicating success of failure
381 */
382 bool bind(CommunicationListener* listener, const ServiceID& sid);
383
384 /**
385 * Un-binds a listener from this node.
386 *
387 * @param The listener to be unbound
388 * @return boolean indicating success of failure
389 */
390 bool unbind(CommunicationListener* listener, const ServiceID& sid);
391
392 //-------------------------------------------------------------------------
393 //
394 // --- optimization proposal: allow direct endpoint descriptor exchange ---
395 // main-idea: directly allow exchanging endpoint descriptors to establish
396 // links. Depending on the overlay structure used in the base overlay, this
397 // allows a node to directly establish links between two nodes when an
398 // endpoint descriptor is known.
399 //
400 //const EndpointDescriptor& getEndpointDescriptor( const LinkID& lid );
401 //void sendMessage( EndpointDescriptor& epd, Message* msg );
402 //LinkID setupLink( const EndpointDescriptor& endpointDesc,
403 // const LinkProperties& req = LinkProperties::UNSPECIFIED,
404 // const Message* msg = NULL );
405 //
406 //-------------------------------------------------------------------------
407
408 // --- module implementation ---
409 //
410 // main-idea: use module properties to configure nodeid, spovnetid etc. and
411 // select start/stop procedures. This allows simulations to start a
412 // node without manually calling join etc.
413
414 /** @see Module.h */
415 string getName() const;
416
417
418private:
419 inline void check_send_priority(uint8_t priority);
420
421
422protected:
423 // friends
424 friend class AribaModule;
425
426 // member variables
427 Name name; //< node name
428// AribaModule* ariba_mod; //< ariba module
429 SpoVNetID spovnetId; //< current spovnet id
430 NodeID nodeId; //< current node id
431 communication::BaseCommunication* base_communication;
432 overlay::BaseOverlay* base_overlay; //< the base overlay
433
434};
435
436} // namespace ariba
437
438/** @} */
439
440#endif /* NODE_H_ */
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