table: allow strategy versioning
refs #1893
Change-Id: I44eb8dd319d737d786b6ce6f753ae2f9076cf9c1
diff --git a/daemon/fw/best-route-strategy2.cpp b/daemon/fw/best-route-strategy2.cpp
index 58300fe..323bb3d 100644
--- a/daemon/fw/best-route-strategy2.cpp
+++ b/daemon/fw/best-route-strategy2.cpp
@@ -31,8 +31,7 @@
NFD_LOG_INIT("BestRouteStrategy2");
-/// \todo set to ndn:/localhost/nfd/strategy/best-route/%FD%02 after #1893 completion
-const Name BestRouteStrategy2::STRATEGY_NAME("ndn:/localhost/nfd/strategy/best-route");
+const Name BestRouteStrategy2::STRATEGY_NAME("ndn:/localhost/nfd/strategy/best-route/%FD%02");
/// \todo don't use fixed interval; make it adaptive or use exponential back-off #1913
const time::milliseconds BestRouteStrategy2::MIN_RETRANSMISSION_INTERVAL(100);
diff --git a/daemon/fw/broadcast-strategy.cpp b/daemon/fw/broadcast-strategy.cpp
index c619e04..48ab17b 100644
--- a/daemon/fw/broadcast-strategy.cpp
+++ b/daemon/fw/broadcast-strategy.cpp
@@ -1,11 +1,12 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
- * Copyright (c) 2014 Regents of the University of California,
- * Arizona Board of Regents,
- * Colorado State University,
- * University Pierre & Marie Curie, Sorbonne University,
- * Washington University in St. Louis,
- * Beijing Institute of Technology
+ * Copyright (c) 2014, Regents of the University of California,
+ * Arizona Board of Regents,
+ * Colorado State University,
+ * University Pierre & Marie Curie, Sorbonne University,
+ * Washington University in St. Louis,
+ * Beijing Institute of Technology,
+ * The University of Memphis
*
* This file is part of NFD (Named Data Networking Forwarding Daemon).
* See AUTHORS.md for complete list of NFD authors and contributors.
@@ -20,14 +21,14 @@
*
* You should have received a copy of the GNU General Public License along with
* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
- **/
+ */
#include "broadcast-strategy.hpp"
namespace nfd {
namespace fw {
-const Name BroadcastStrategy::STRATEGY_NAME("ndn:/localhost/nfd/strategy/broadcast");
+const Name BroadcastStrategy::STRATEGY_NAME("ndn:/localhost/nfd/strategy/broadcast/%FD%01");
BroadcastStrategy::BroadcastStrategy(Forwarder& forwarder, const Name& name)
: Strategy(forwarder, name)
diff --git a/daemon/fw/client-control-strategy.cpp b/daemon/fw/client-control-strategy.cpp
index f8d83a8..d3700e3 100644
--- a/daemon/fw/client-control-strategy.cpp
+++ b/daemon/fw/client-control-strategy.cpp
@@ -1,11 +1,12 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
- * Copyright (c) 2014 Regents of the University of California,
- * Arizona Board of Regents,
- * Colorado State University,
- * University Pierre & Marie Curie, Sorbonne University,
- * Washington University in St. Louis,
- * Beijing Institute of Technology
+ * Copyright (c) 2014, Regents of the University of California,
+ * Arizona Board of Regents,
+ * Colorado State University,
+ * University Pierre & Marie Curie, Sorbonne University,
+ * Washington University in St. Louis,
+ * Beijing Institute of Technology,
+ * The University of Memphis
*
* This file is part of NFD (Named Data Networking Forwarding Daemon).
* See AUTHORS.md for complete list of NFD authors and contributors.
@@ -20,7 +21,7 @@
*
* You should have received a copy of the GNU General Public License along with
* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
- **/
+ */
#include "client-control-strategy.hpp"
#include "core/logger.hpp"
@@ -30,7 +31,8 @@
NFD_LOG_INIT("ClientControlStrategy");
-const Name ClientControlStrategy::STRATEGY_NAME("ndn:/localhost/nfd/strategy/client-control");
+const Name
+ClientControlStrategy::STRATEGY_NAME("ndn:/localhost/nfd/strategy/client-control/%FD%01");
ClientControlStrategy::ClientControlStrategy(Forwarder& forwarder, const Name& name)
: BestRouteStrategy(forwarder, name)
diff --git a/daemon/fw/ncc-strategy.cpp b/daemon/fw/ncc-strategy.cpp
index 925a3cf..bb93bd5 100644
--- a/daemon/fw/ncc-strategy.cpp
+++ b/daemon/fw/ncc-strategy.cpp
@@ -30,7 +30,7 @@
namespace nfd {
namespace fw {
-const Name NccStrategy::STRATEGY_NAME("ndn:/localhost/nfd/strategy/ncc");
+const Name NccStrategy::STRATEGY_NAME("ndn:/localhost/nfd/strategy/ncc/%FD%01");
NccStrategy::NccStrategy(Forwarder& forwarder, const Name& name)
: Strategy(forwarder, name)
diff --git a/daemon/fw/strategy.hpp b/daemon/fw/strategy.hpp
index f910383..e1ff23c 100644
--- a/daemon/fw/strategy.hpp
+++ b/daemon/fw/strategy.hpp
@@ -37,6 +37,13 @@
class Strategy : public enable_shared_from_this<Strategy>, noncopyable
{
public:
+ /** \brief construct a strategy instance
+ * \param forwarder a reference to the Forwarder, used to enable actions and accessors.
+ * Strategy subclasses should pass this reference,
+ * and should not keep a reference themselves.
+ * \param name the strategy Name.
+ * It's recommended to include a version number as the last component.
+ */
Strategy(Forwarder& forwarder, const Name& name);
virtual
diff --git a/daemon/table/strategy-choice.cpp b/daemon/table/strategy-choice.cpp
index aa5db1b..6500191 100644
--- a/daemon/table/strategy-choice.cpp
+++ b/daemon/table/strategy-choice.cpp
@@ -44,9 +44,14 @@
}
bool
-StrategyChoice::hasStrategy(const Name& strategyName) const
+StrategyChoice::hasStrategy(const Name& strategyName, bool isExact) const
{
- return m_strategyInstances.count(strategyName) > 0;
+ if (isExact) {
+ return m_strategyInstances.count(strategyName) > 0;
+ }
+ else {
+ return static_cast<bool>(this->getStrategy(strategyName));
+ }
}
bool
@@ -64,35 +69,51 @@
return true;
}
+shared_ptr<fw::Strategy>
+StrategyChoice::getStrategy(const Name& strategyName) const
+{
+ shared_ptr<fw::Strategy> candidate;
+ for (StrategyInstanceTable::const_iterator it = m_strategyInstances.lower_bound(strategyName);
+ it != m_strategyInstances.end() && strategyName.isPrefixOf(it->first); ++it) {
+ switch (it->first.size() - strategyName.size()) {
+ case 0: // exact match
+ return it->second;
+ case 1: // unversioned strategyName matches versioned strategy
+ candidate = it->second;
+ break;
+ }
+ }
+ return candidate;
+}
+
bool
StrategyChoice::insert(const Name& prefix, const Name& strategyName)
{
- shared_ptr<name_tree::Entry> nameTreeEntry = m_nameTree.lookup(prefix);
- shared_ptr<Entry> entry = nameTreeEntry->getStrategyChoiceEntry();
- shared_ptr<Strategy> oldStrategy;
-
- if (static_cast<bool>(entry)) {
- if (entry->getStrategy().getName() == strategyName) {
- NFD_LOG_TRACE("insert(" << prefix << "," << strategyName << ") not changing");
- return true;
- }
- oldStrategy = entry->getStrategy().shared_from_this();
- NFD_LOG_TRACE("insert(" << prefix << "," << strategyName << ") "
- "changing from " << oldStrategy->getName());
- }
-
shared_ptr<Strategy> strategy = this->getStrategy(strategyName);
if (!static_cast<bool>(strategy)) {
NFD_LOG_ERROR("insert(" << prefix << "," << strategyName << ") strategy not installed");
return false;
}
+ shared_ptr<name_tree::Entry> nameTreeEntry = m_nameTree.lookup(prefix);
+ shared_ptr<Entry> entry = nameTreeEntry->getStrategyChoiceEntry();
+ shared_ptr<Strategy> oldStrategy;
+ if (static_cast<bool>(entry)) {
+ if (entry->getStrategy().getName() == strategy->getName()) {
+ NFD_LOG_TRACE("insert(" << prefix << ") not changing " << strategy->getName());
+ return true;
+ }
+ oldStrategy = entry->getStrategy().shared_from_this();
+ NFD_LOG_TRACE("insert(" << prefix << ") changing from " << oldStrategy->getName() <<
+ " to " << strategy->getName());
+ }
+
if (!static_cast<bool>(entry)) {
oldStrategy = this->findEffectiveStrategy(prefix).shared_from_this();
entry = make_shared<Entry>(prefix);
nameTreeEntry->setStrategyChoiceEntry(entry);
++m_nItems;
- NFD_LOG_TRACE("insert(" << prefix << "," << strategyName << ") new entry");
+ NFD_LOG_TRACE("insert(" << prefix << ") new entry " << strategy->getName());
}
this->changeStrategy(entry, oldStrategy, strategy);
@@ -187,13 +208,6 @@
return findEffectiveStrategy(nameTreeEntry);
}
-shared_ptr<fw::Strategy>
-StrategyChoice::getStrategy(const Name& strategyName)
-{
- StrategyInstanceTable::iterator it = m_strategyInstances.find(strategyName);
- return it != m_strategyInstances.end() ? it->second : shared_ptr<fw::Strategy>();
-}
-
void
StrategyChoice::setDefaultStrategy(shared_ptr<Strategy> strategy)
{
diff --git a/daemon/table/strategy-choice.hpp b/daemon/table/strategy-choice.hpp
index 9441dcc..d454a29 100644
--- a/daemon/table/strategy-choice.hpp
+++ b/daemon/table/strategy-choice.hpp
@@ -21,7 +21,7 @@
*
* You should have received a copy of the GNU General Public License along with
* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
- **/
+ */
#ifndef NFD_DAEMON_TABLE_STRATEGY_CHOICE_HPP
#define NFD_DAEMON_TABLE_STRATEGY_CHOICE_HPP
@@ -31,16 +31,29 @@
namespace nfd {
+/** \brief represents the Strategy Choice table
+ *
+ * The Strategy Choice table maintains available Strategy types,
+ * and associates Name prefixes with Strategy types.
+ *
+ * Each strategy is identified by a strategyName.
+ * It's recommended to include a version number as the last component of strategyName.
+ *
+ * A Name prefix is owned by a strategy if a longest prefix match on the
+ * Strategy Choice table returns that strategy.
+ */
class StrategyChoice : noncopyable
{
public:
StrategyChoice(NameTree& nameTree, shared_ptr<fw::Strategy> defaultStrategy);
public: // available Strategy types
- /** \return true if strategy is installed
+ /** \brief determines if a strategy is installed
+ * \param isExact true to require exact match, false to permit unversioned strategyName
+ * \return true if strategy is installed
*/
bool
- hasStrategy(const Name& strategyName) const;
+ hasStrategy(const Name& strategyName, bool isExact = false) const;
/** \brief install a strategy
* \return true if installed; false if not installed due to duplicate strategyName
@@ -50,8 +63,13 @@
public: // Strategy Choice table
/** \brief set strategy of prefix to be strategyName
- * \param strategyName the strategy to be used, must be installed
+ * \param strategyName the strategy to be used
* \return true on success
+ *
+ * This method set a strategy onto a Name prefix.
+ * The strategy must have been installed.
+ * The strategyName can either be exact (contains version component),
+ * or omit the version component to pick the latest version.
*/
bool
insert(const Name& prefix, const Name& strategyName);
@@ -125,8 +143,11 @@
end() const;
private:
+ /** \brief get Strategy instance by strategyName
+ * \param strategyName a versioned or unversioned strategyName
+ */
shared_ptr<fw::Strategy>
- getStrategy(const Name& strategyName);
+ getStrategy(const Name& strategyName) const;
void
setDefaultStrategy(shared_ptr<fw::Strategy> strategy);