Added getClusterCacheMaxSize, getClusterCacheCurrentSize, and setClusterCacheMaxSize methods in Archive to manage the cluster cache size in libzim.

Author: MohitMaliDeveloper

lib/src/main/cpp/libzim/archive.cpp

@@ -410,3 +410,15 @@ METHOD(jobject, findByTitle, jstring title) {
   setPtr(env, obj, std::move(end_ptr), "nativeHandleEnd");
   return obj;
 } CATCH_EXCEPTION(nullptr)
+
+METHOD0(jlong, getClusterCacheMaxSize) {
+    return static_cast<jlong>(zim::getClusterCacheMaxSize());
+} CATCH_EXCEPTION(0)
+
+METHOD0(jlong, getClusterCacheCurrentSize) {
+    return static_cast<jlong>(zim::getClusterCacheCurrentSize());
+} CATCH_EXCEPTION(0)
+
+METHOD(void, setClusterCacheMaxSize, jlong sizeInBytes) {
+    zim::setClusterCacheMaxSize(static_cast<size_t>(sizeInBytes));
+} CATCH_EXCEPTION()

lib/src/main/java/org/kiwix/libzim/Archive.java

@@ -135,6 +135,9 @@ public Archive(FdInput[] fds, OpenConfig openConfig)
   public native long getDirentCacheMaxSize();
   public native long getDirentCacheCurrentSize();
   public native void setDirentCacheMaxSize(long nbDirents);
+  public native long getClusterCacheMaxSize();
+  public native long getClusterCacheCurrentSize();
+  public native void setClusterCacheMaxSize(long sizeInBytes);
 
 
   private native void setNativeArchive(String filename);

lib/src/test/org/kiwix/test/libzim/TestArchive.java

@@ -140,5 +140,9 @@ public TestArchive(FdInput[] fds, OpenConfig openConfig)
   public long getDirentCacheCurrentSize() { return inner.getDirentCacheCurrentSize(); }
   public void setDirentCacheMaxSize(long nbDirents) { inner.setDirentCacheMaxSize(nbDirents); }
 
+  public long getClusterCacheMaxSize() { return inner.getClusterCacheMaxSize(); }
+  public long getClusterCacheCurrentSize() { return inner.getClusterCacheCurrentSize(); }
+  public void setClusterCacheMaxSize(long sizeInBytes) { inner.setClusterCacheMaxSize(sizeInBytes); }
+
   public void dispose() { inner.dispose(); }
 }

lib/src/test/test.java

@@ -226,6 +226,18 @@ private void testArchive(TestArchive archive)
         long currentCacheSize = archive.getDirentCacheCurrentSize();
         assertEquals(19, currentCacheSize);
         archive.setDirentCacheMaxSize(19);
+        // Cluster size
+        long clusterCacheMaxSize = archive.getClusterCacheMaxSize();
+        assertEquals(536870912, clusterCacheMaxSize);
+        long clusterCacheCurrentSize = archive.getClusterCacheCurrentSize();
+        assertTrue(clusterCacheCurrentSize > 0);
+        // Set the new cluster size
+        archive.setClusterCacheMaxSize(clusterCacheMaxSize / 2);
+        // Test new cluster size set or not.
+        long clusterCacheMaxSize1 = archive.getClusterCacheMaxSize();
+        assertEquals(clusterCacheMaxSize / 2, clusterCacheMaxSize1);
+        // Set the cluster max size
+        archive.setClusterCacheMaxSize(536870912);
         System.gc();
         System.runFinalization();
     }