initial commit

lib/wDatabase/resourcecache.h

@@ -0,0 +1,84 @@
+#ifndef RESOURCECACHE_H
+#define RESOURCECACHE_H
+
+#include <set>
+#include <map>
+
+#include "lmdb++.h"
+
+#include <wModel/model.h>
+#include <wModel/file/file.h>
+#include <wType/address.h>
+#include <wType/string.h>
+#include <wType/bytearray.h>
+#include <wType/uint64.h>
+#include <wType/blob.h>
+#include <utils/exception.h>
+
+
+class ResourceCache : public M::Model
+{
+    Q_OBJECT
+public:
+    ResourceCache(const W::String& dbName, QObject* parent = 0);
+    ~ResourceCache();
+    
+    void open();
+    uint64_t addResource(const W::String& path);
+    void removeResource(uint64_t id);
+    void clear();
+    bool has(uint64_t id) const;
+    W::String getPath(uint64_t id) const;
+    std::set<uint64_t> getAllIdentificators() const;
+    
+    W::Handler* subscribeMember;
+    handler(subscribeMember);
+    
+    M::Model::ModelType getType() const override;
+    static const M::Model::ModelType type = resourceCache;
+    void set(const W::Object & value) override;
+    void set(W::Object * value) override;
+
+signals:
+    void countChange(uint64_t count);
+    
+protected:
+    void h_subscribe(const W::Event & ev) override;
+    
+    handler(get);
+    
+    W::String* getElement(uint64_t id) const;
+    
+public:
+    const W::String name;
+    
+private:
+    bool opened;
+    lmdb::env environment;
+    lmdb::dbi dbi;
+    std::set<uint64_t> elements;
+    uint64_t lastIndex;
+    
+    void checkDirAndOpenEnvironment();
+    W::Blob* readFile(const W::String& path) const;
+    
+    class ClosedDB: 
+    public Utils::Exception
+    {
+    public:
+        ClosedDB(const std::string& p_op):Exception(), operation(p_op){}
+        
+        std::string getMessage() const {
+            std::string str = "An attempt to perform method ResourceCache::";
+            str += operation;
+            str += " but the database is not open";
+            return str;
+            
+        }
+        
+    private:
+        std::string operation;
+    };
+};
+
+#endif // RESOURCECACHE_H