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108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
/***************************************************************************
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* Copyright (C) gempa GmbH *
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* All rights reserved. *
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* Contact: gempa GmbH (seiscomp-dev@gempa.de) *
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* *
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* GNU Affero General Public License Usage *
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* This file may be used under the terms of the GNU Affero *
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* Public License version 3.0 as published by the Free Software Foundation *
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* and appearing in the file LICENSE included in the packaging of this *
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* file. Please review the following information to ensure the GNU Affero *
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* Public License version 3.0 requirements will be met: *
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* https://www.gnu.org/licenses/agpl-3.0.html. *
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* *
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* Other Usage *
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* Alternatively, this file may be used in accordance with the terms and *
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* conditions contained in a signed written agreement between you and *
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* gempa GmbH. *
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***************************************************************************/
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#ifndef SC_LOGGING_NODE_H
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#define SC_LOGGING_NODE_H
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#include <list>
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#include <set>
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#include <time.h>
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#include <string>
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#include <mutex>
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#include <seiscomp/core.h>
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namespace Seiscomp {
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namespace Logging {
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class SC_SYSTEM_CORE_API Node;
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/*! @struct Data <seiscomp/logging/node.h>
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@brief Data published through Node
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Data is the data which is published from SEISCOMP_DEBUG(), SEISCOMP_WARNING(),
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SEISCOMP_ERROR() and SEISCOMP_LOG() macros. It contains a link to the
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publisher, the (approximate) time of the publication, and the formatted message.
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Note that none of the data in the publication is considered to be static.
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Once control has returned to the publisher, the data may be destroyed. If
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it is necessary to hang on to any of the data, a deep copy must be made.
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*/
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struct SC_SYSTEM_CORE_API Data {
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struct PublishLoc *publisher;
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//! time of publication
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time_t time;
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//! formatted msg - gets destroyed when publish() call returns.
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const char *msg;
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// track which nodes have seen this message, to avoid getting
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// duplicates. It would be nice if we could enforce this via the node
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// structure instead, but that is much harder.
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std::set<Node*> seen;
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};
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// documentation in implementation file
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class SC_SYSTEM_CORE_API Node {
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public:
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Node();
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virtual ~Node();
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// remove this node from the subscription network
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virtual void clear();
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virtual void publish(const Data &data);
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// primary interface
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virtual void addPublisher(Node *);
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virtual void dropPublisher(Node *, bool callbacks=true );
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bool enabled() const;
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// used internally - see documentation
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virtual void addSubscriber(Node *);
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virtual void dropSubscriber(Node *);
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virtual void isInterested(Node *node, bool isInterested);
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protected:
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// called by Node when enable state changed.
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virtual void setEnabled(bool newState);
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//! list of nodes we are subscribed to
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std::list<Node *> publishers;
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//! list of nodes we publish to
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std::list<Node *> subscribers;
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//! list of subscribers that are interested in receiving publications..
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std::list<Node *> interestList;
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std::mutex mutex;
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};
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}
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}
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#endif
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