SOLR-13821: Return the size of the file

solr/core/src/java/org/apache/solr/filestore/DistribPackageStore.java

@@ -280,6 +280,11 @@ public class DistribPackageStore implements PackageStore {
           return type == FileType.DIRECTORY;
         }
 
+        @Override
+        public long size() {
+          return realPath().toFile().length();
+        }
+
         @Override
         public void writeMap(EntryWriter ew) throws IOException {
           MetaData metaData = readMetaData();
@@ -288,6 +293,8 @@ public class DistribPackageStore implements PackageStore {
             ew.put("dir", true);
             return;
           }
+
+          ew.put("size", size());
           ew.put("timestamp", getTimeStamp());
           if (metaData != null)
             metaData.writeMap(ew);

solr/core/src/java/org/apache/solr/filestore/PackageStore.java

@@ -113,6 +113,8 @@ public interface PackageStore {
 
     Date getTimeStamp();
 
+    long size();
+
     boolean isDir();
 
 

solr/core/src/java/org/apache/solr/pkg/PackageLoader.java

@@ -94,7 +94,7 @@ public class PackageLoader implements Closeable {
       } else {
         Package p = packageClassLoaders.remove(e.getKey());
         if (p != null) {
-          //other classes are holding to a reference to this objecec
+          //other classes are holding to a reference to this object
           // they should know that this is removed
           p.markDeleted();
           closeWhileHandlingException(p);