write to disk

src/main/java/com/cfdeployer/service/ChunkedUploadService.java

@@ -61,16 +61,26 @@ public class ChunkedUploadService {
                             fileType, fileState.getTotalChunks(), totalChunks));
         }
 
-        // Write chunk to file
+        // Write chunk to file using streaming to avoid loading entire chunk into memory
         Path targetPath = fileState.getTargetPath();
         long offset = (long) chunkIndex * getChunkSize();
 
-        try (RandomAccessFile raf = new RandomAccessFile(targetPath.toFile(), "rw")) {
+        try (RandomAccessFile raf = new RandomAccessFile(targetPath.toFile(), "rw");
+             var inputStream = chunk.getInputStream()) {
             raf.seek(offset);
-            byte[] data = chunk.getBytes();
-            raf.write(data);
+
+            // Stream chunk data in smaller buffers to reduce memory pressure
+            byte[] buffer = new byte[8192]; // 8KB buffer
+            int bytesRead;
+            long totalWritten = 0;
+
+            while ((bytesRead = inputStream.read(buffer)) != -1) {
+                raf.write(buffer, 0, bytesRead);
+                totalWritten += bytesRead;
+            }
+
             log.debug("Wrote chunk {} ({} bytes) to {} at offset {}",
-                    chunkIndex, data.length, targetPath.getFileName(), offset);
+                    chunkIndex, totalWritten, targetPath.getFileName(), offset);
         }
 
         fileState.markChunkReceived(chunkIndex);