1 files changed, 32 insertions, 0 deletions
diff --git a/src/rocksdb/java/rocksjni/jnicallback.h b/src/rocksdb/java/rocksjni/jnicallback.h
new file mode 100644
index 000000000..a03a04128
--- /dev/null
+++ b/src/rocksdb/java/rocksjni/jnicallback.h
@@ -0,0 +1,32 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+//
+// This file implements the callback "bridge" between Java and C++ for
+// JNI Callbacks from C++ to sub-classes or org.rocksdb.RocksCallbackObject
+
+#ifndef JAVA_ROCKSJNI_JNICALLBACK_H_
+#define JAVA_ROCKSJNI_JNICALLBACK_H_
+
+#include <jni.h>
+
+#include "rocksdb/rocksdb_namespace.h"
+
+namespace ROCKSDB_NAMESPACE {
+class JniCallback {
+ public:
+  JniCallback(JNIEnv* env, jobject jcallback_obj);
+  virtual ~JniCallback();
+
+  const jobject& GetJavaObject() const { return m_jcallback_obj; }
+
+ protected:
+  JavaVM* m_jvm;
+  jobject m_jcallback_obj;
+  JNIEnv* getJniEnv(jboolean* attached) const;
+  void releaseJniEnv(jboolean& attached) const;
+};
+}  // namespace ROCKSDB_NAMESPACE
+
+#endif  // JAVA_ROCKSJNI_JNICALLBACK_H_