diff --git a/.classpath b/.classpath
index cad48e8..e2a62f4 100644
--- a/.classpath
+++ b/.classpath
@@ -36,5 +36,10 @@
 			<attribute name="owner.project.facets" value="jst.utility"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="src" path=".apt_generated">
+		<attributes>
+			<attribute name="optional" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/.gitignore b/.gitignore
index 9a75992..8ff95e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /build
 /dist
 *~
+/.apt_generated/
diff --git a/.settings/org.eclipse.jdt.apt.core.prefs b/.settings/org.eclipse.jdt.apt.core.prefs
new file mode 100644
index 0000000..fa6bcfb
--- /dev/null
+++ b/.settings/org.eclipse.jdt.apt.core.prefs
@@ -0,0 +1,5 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.apt.aptEnabled=true
+org.eclipse.jdt.apt.genSrcDir=.apt_generated
+org.eclipse.jdt.apt.genTestSrcDir=.apt_generated_tests
+org.eclipse.jdt.apt.reconcileEnabled=true
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index 12af6a4..20e85e6 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -21,6 +21,7 @@ org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.processAnnotations=enabled
 org.eclipse.jdt.core.compiler.release=enabled
 org.eclipse.jdt.core.compiler.source=17
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
diff --git a/.settings/org.eclipse.jdt.ui.prefs b/.settings/org.eclipse.jdt.ui.prefs
index 9ddc361..a0a7b2e 100644
--- a/.settings/org.eclipse.jdt.ui.prefs
+++ b/.settings/org.eclipse.jdt.ui.prefs
@@ -152,6 +152,7 @@ org.eclipse.jdt.ui.exception.name=exception
 org.eclipse.jdt.ui.gettersetter.use.is=true
 org.eclipse.jdt.ui.keywordthis=false
 org.eclipse.jdt.ui.overrideannotation=true
+org.eclipse.jdt.ui.text.custom_code_templates=
 sp_cleanup.add_all=false
 sp_cleanup.add_default_serial_version_id=true
 sp_cleanup.add_generated_serial_version_id=false
diff --git a/.settings/org.eclipse.wst.common.component b/.settings/org.eclipse.wst.common.component
index 8557b74..8e52c05 100644
--- a/.settings/org.eclipse.wst.common.component
+++ b/.settings/org.eclipse.wst.common.component
@@ -1,6 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?><project-modules id="moduleCoreId" project-version="1.5.0">
-    <wb-module deploy-name="SikevaDB">
+        
+    <wb-module deploy-name="StatooInfos">
+                
         <wb-resource deploy-path="/" source-path="/src"/>
+                
         <wb-resource deploy-path="/" source-path="/test"/>
+        <wb-resource deploy-path="/" source-path="/.apt_generated"/>
+            
     </wb-module>
+    
 </project-modules>
diff --git a/src/fr/devinsy/statoolinfos/core/StatoolInfosContext.java b/src/fr/devinsy/statoolinfos/core/StatoolInfosContext.java
index 40bc777..af1de1a 100644
--- a/src/fr/devinsy/statoolinfos/core/StatoolInfosContext.java
+++ b/src/fr/devinsy/statoolinfos/core/StatoolInfosContext.java
@@ -21,6 +21,8 @@ package fr.devinsy.statoolinfos.core;
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
 
 import fr.devinsy.statoolinfos.crawl.CrawlCache;
 import fr.devinsy.statoolinfos.uptime.UptimeJournal;
@@ -32,6 +34,7 @@ public class StatoolInfosContext
 {
     private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(StatoolInfosContext.class);
 
+    private LocalDateTime initDateTime;
     private Configuration configuration;
     private Federation federation;
     private Categories categories;
@@ -81,6 +84,7 @@ public class StatoolInfosContext
                 this.categories = Factory.loadCategories(categoriesURL, this.federation);
             }
             this.uptimeJournal = this.cache.restoreUptimeJournal();
+            this.initDateTime = LocalDateTime.now();
             System.out.println("Loaded configuration context in " + (System.currentTimeMillis() - startTime) + " ms.");
         }
         else
@@ -158,4 +162,31 @@ public class StatoolInfosContext
     {
         return this.uptimeJournal;
     }
+
+    /**
+     * Checks if is expired.
+     *
+     * @return true, if is expired
+     */
+    public boolean isExpired()
+    {
+        boolean result;
+
+        getCache();
+
+        long cacheTime = this.getCache().getDirectory().lastModified();
+        LocalDateTime cacheDateTime = LocalDateTime.ofEpochSecond(cacheTime / 1000, 0, OffsetDateTime.now().getOffset());
+
+        if (cacheDateTime.isAfter(this.initDateTime))
+        {
+            result = true;
+        }
+        else
+        {
+            result = false;
+        }
+
+        //
+        return result;
+    }
 }