table: MeasurementsAccessor for strategy
refs #1276
Change-Id: Idec8f615c726f51612236a55a7532fabeb81a32d
diff --git a/daemon/table/measurements-accessor.hpp b/daemon/table/measurements-accessor.hpp
new file mode 100644
index 0000000..26a6d38
--- /dev/null
+++ b/daemon/table/measurements-accessor.hpp
@@ -0,0 +1,123 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (C) 2014 Named Data Networking Project
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NFD_TABLE_MEASUREMENTS_ACCESSOR_HPP
+#define NFD_TABLE_MEASUREMENTS_ACCESSOR_HPP
+
+#include "measurements.hpp"
+#include "fib.hpp"
+
+namespace nfd {
+
+namespace fw {
+class Strategy;
+}
+
+/** \brief allows Strategy to access portion of Measurements table under its namespace
+ */
+class MeasurementsAccessor : noncopyable
+{
+public:
+ MeasurementsAccessor(Measurements& measurements, Fib& fib, fw::Strategy* strategy);
+
+ ~MeasurementsAccessor();
+
+ /// find or insert a Measurements entry for name
+ shared_ptr<measurements::Entry>
+ get(const Name& name);
+
+ /// find or insert a Measurements entry for fibEntry->getPrefix()
+ shared_ptr<measurements::Entry>
+ get(const fib::Entry& fibEntry);
+
+ /// find or insert a Measurements entry for pitEntry->getName()
+ shared_ptr<measurements::Entry>
+ get(const pit::Entry& pitEntry);
+
+ /** \brief find or insert a Measurements entry for child's parent
+ *
+ * If child is the root entry, returns null.
+ */
+ shared_ptr<measurements::Entry>
+ getParent(shared_ptr<measurements::Entry> child);
+
+// /// perform a longest prefix match
+// shared_ptr<fib::Entry>
+// findLongestPrefixMatch(const Name& name) const;
+//
+// /// perform an exact match
+// shared_ptr<fib::Entry>
+// findExactMatch(const Name& name) const;
+
+ /** \brief extend lifetime of an entry
+ *
+ * The entry will be kept until at least now()+lifetime.
+ */
+ void
+ extendLifetime(measurements::Entry& entry, const time::Duration& lifetime);
+
+private:
+ /** \brief perform access control to Measurements entry
+ *
+ * \return entry if strategy has access to namespace, otherwise 0
+ */
+ shared_ptr<measurements::Entry>
+ filter(const shared_ptr<measurements::Entry>& entry);
+
+private:
+ Measurements& m_measurements;
+ Fib& m_fib;
+ fw::Strategy* m_strategy;
+};
+
+inline shared_ptr<measurements::Entry>
+MeasurementsAccessor::get(const Name& name)
+{
+ return this->filter(m_measurements.get(name));
+}
+
+inline shared_ptr<measurements::Entry>
+MeasurementsAccessor::get(const fib::Entry& fibEntry)
+{
+ if (&fibEntry.getStrategy() == m_strategy) {
+ return m_measurements.get(fibEntry);
+ }
+ return shared_ptr<measurements::Entry>();
+}
+
+inline shared_ptr<measurements::Entry>
+MeasurementsAccessor::get(const pit::Entry& pitEntry)
+{
+ return this->filter(m_measurements.get(pitEntry));
+}
+
+inline shared_ptr<measurements::Entry>
+MeasurementsAccessor::getParent(shared_ptr<measurements::Entry> child)
+{
+ return this->filter(m_measurements.getParent(child));
+}
+
+//inline shared_ptr<fib::Entry>
+//MeasurementsAccessor::findLongestPrefixMatch(const Name& name) const
+//{
+// return this->filter(m_measurements.findLongestPrefixMatch(name));
+//}
+//
+//inline shared_ptr<fib::Entry>
+//MeasurementsAccessor::findExactMatch(const Name& name) const
+//{
+// return this->filter(m_measurements.findExactMatch(name));
+//}
+
+inline void
+MeasurementsAccessor::extendLifetime(measurements::Entry& entry, const time::Duration& lifetime)
+{
+ m_measurements.extendLifetime(entry, lifetime);
+}
+
+} // namespace nfd
+
+#endif // NFD_TABLE_MEASUREMENTS_ACCESSOR_HPP