HostInfoCache: Use QCache.

src/ui/FortFirewall.pro

@@ -58,6 +58,7 @@ SOURCES += \
     util/hotkeymanager.cpp \
     util/logger.cpp \
     util/nativeeventfilter.cpp \
+    util/net/hostinfo.cpp \
     util/net/hostinfocache.cpp \
     util/net/hostinfomanager.cpp \
     util/net/hostinfoworker.cpp \
@@ -122,6 +123,7 @@ HEADERS += \
     util/hotkeymanager.h \
     util/logger.h \
     util/nativeeventfilter.h \
+    util/net/hostinfo.h \
     util/net/hostinfocache.h \
     util/net/hostinfomanager.h \
     util/net/hostinfoworker.h \

src/ui/util/net/hostinfo.cpp

@@ -0,0 +1 @@
+#include "hostinfo.h"

src/ui/util/net/hostinfo.h

@@ -0,0 +1,15 @@
+#ifndef HOSTINFO_H
+#define HOSTINFO_H
+
+#include <QObject>
+
+class HostInfo
+{
+    Q_GADGET
+    Q_PROPERTY(QString hostName MEMBER hostName CONSTANT)
+
+public:
+    QString hostName;
+};
+
+#endif // HOSTINFO_H

src/ui/util/net/hostinfocache.cpp

@@ -4,27 +4,31 @@
 
 HostInfoCache::HostInfoCache(QObject *parent) :
     QObject(parent),
-    m_manager(new HostInfoManager(this))
+    m_manager(new HostInfoManager(this)),
+    m_cache(1 * 1024 * 1024)
 {
     connect(m_manager, &HostInfoManager::lookupFinished,
             this, &HostInfoCache::handleFinishedLookup);
 
-    m_timer.setSingleShot(true);
+    m_triggerTimer.setSingleShot(true);
-    m_timer.setInterval(200);
+    m_triggerTimer.setInterval(200);
 
-    connect(&m_timer, &QTimer::timeout,
+    connect(&m_triggerTimer, &QTimer::timeout,
             this, &HostInfoCache::cacheChanged);
 }
 
 QString HostInfoCache::hostName(const QString &address)
 {
-    if (!m_cache.contains(address)) {
+    HostInfo *hostInfo = m_cache.object(address);
-        m_cache.insert(address, QString());
+
+    if (hostInfo == nullptr) {
+        hostInfo = new HostInfo();
+
+        m_cache.insert(address, hostInfo, 4);
         m_manager->lookupHost(address);
-        return QString();
     }
 
-    return m_cache.value(address);
+    return hostInfo->hostName;
 }
 
 void HostInfoCache::clear()
@@ -38,14 +42,19 @@ void HostInfoCache::clear()
 void HostInfoCache::handleFinishedLookup(const QString &address,
                                          const QString &hostName)
 {
-    m_cache.insert(address, hostName);
+    HostInfo *hostInfo = m_cache.take(address);
+    if (hostInfo == nullptr)
+        return;
+
+    hostInfo->hostName = hostName;
+    m_cache.insert(address, hostInfo, hostName.size());
 
     emitCacheChanged();
 }
 
 void HostInfoCache::emitCacheChanged()
 {
-    if (!m_timer.isActive()) {
+    if (!m_triggerTimer.isActive()) {
-        m_timer.start();
+        m_triggerTimer.start();
     }
 }

src/ui/util/net/hostinfocache.h

@@ -1,10 +1,12 @@
 #ifndef HOSTINFOCACHE_H
 #define HOSTINFOCACHE_H
 
+#include <QCache>
 #include <QObject>
-#include <QHash>
 #include <QTimer>
 
+#include "hostinfo.h"
+
 QT_FORWARD_DECLARE_CLASS(HostInfoManager)
 
 class HostInfoCache : public QObject
@@ -35,9 +37,9 @@ private:
 private:
     HostInfoManager *m_manager;
 
-    QHash<QString, QString> m_cache;
+    QCache<QString, HostInfo> m_cache;
 
-    QTimer m_timer;
+    QTimer m_triggerTimer;
 };
 
 #endif // HOSTINFOCACHE_H