Separate out JSON store from controller code.

1 files changed, 88 insertions, 0 deletions

diff --git a/controller/JSONDB.hpp b/controller/JSONDB.hpp
new file mode 100644
index 00000000..b189c530
--- /dev/null
+++ b/controller/JSONDB.hpp
@@ -0,0 +1,88 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ZT_JSONDB_HPP
+#define ZT_JSONDB_HPP
+
+#include <string>
+#include <map>
+#include <stdexcept>
+#include <vector>
+#include <algorithm>
+
+#include "../node/Constants.hpp"
+#include "../node/Utils.hpp"
+#include "../ext/json/json.hpp"
+#include "../osdep/OSUtils.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Hierarchical JSON store that persists into the filesystem
+ */
+class JSONDB
+{
+public:
+	JSONDB(const std::string &basePath) :
+		_basePath(basePath)
+	{
+		this->_reloadAll(_basePath);
+	}
+
+	bool put(const std::string &n,const nlohmann::json &obj);
+
+	inline bool put(const std::string &n1,const std::string &n2,const nlohmann::json &obj) { return this->put((n1 + "/" + n2),obj); }
+	inline bool put(const std::string &n1,const std::string &n2,const std::string &n3,const nlohmann::json &obj) { return this->put((n1 + "/" + n2 + "/" + n3),obj); }
+
+	const nlohmann::json &get(const std::string &n,unsigned long maxSinceCheck = 0);
+
+	inline const nlohmann::json &get(const std::string &n1,const std::string &n2,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2),maxSinceCheck); }
+	inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2 + "/" + n3),maxSinceCheck); }
+	inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2 + "/" + n3 + "/" + n4),maxSinceCheck); }
+	inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,const std::string &n5,unsigned long maxSinceCheck = 0) { return this->get((n1 + "/" + n2 + "/" + n3 + "/" + n4 + "/" + n5),maxSinceCheck); }
+
+	template<typename F>
+	inline void each(F func,unsigned long maxSinceCheck = 0)
+	{
+		const uint64_t now = OSUtils::now();
+		for(std::map<std::string,_E>::const_iterator i(_db.begin());i!=_db.end();++i) {
+			if ((now - i->second.lastCheck) > (uint64_t)maxSinceCheck)
+				this->get(i->first);
+			func(i->first,i->second.obj);
+		}
+	}
+
+private:
+	bool _isValidObjectName(const std::string &n);
+	std::string _genPath(const std::string &n,bool create);
+	void _reloadAll(const std::string &path);
+
+	struct _E
+	{
+		uint64_t lastModifiedOnDisk;
+		uint64_t lastCheck;
+		nlohmann::json obj;
+	};
+
+	std::string _basePath;
+	std::map<std::string,_E> _db;
+};
+
+} // namespace ZeroTier
+
+#endif