1 files changed, 42 insertions, 0 deletions
diff --git a/src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.cc b/src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.cc
new file mode 100644
index 000000000..26761cabd
--- /dev/null
+++ b/src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.cc
@@ -0,0 +1,42 @@
+// 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
+// ROCKSDB_NAMESPACE::TransactionNotifier.
+
+#include "rocksjni/transaction_notifier_jnicallback.h"
+
+#include "rocksjni/cplusplus_to_java_convert.h"
+#include "rocksjni/portal.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+TransactionNotifierJniCallback::TransactionNotifierJniCallback(
+    JNIEnv* env, jobject jtransaction_notifier)
+    : JniCallback(env, jtransaction_notifier) {
+  // we cache the method id for the JNI callback
+  m_jsnapshot_created_methodID =
+      AbstractTransactionNotifierJni::getSnapshotCreatedMethodId(env);
+}
+
+void TransactionNotifierJniCallback::SnapshotCreated(
+    const Snapshot* newSnapshot) {
+  jboolean attached_thread = JNI_FALSE;
+  JNIEnv* env = getJniEnv(&attached_thread);
+  assert(env != nullptr);
+
+  env->CallVoidMethod(m_jcallback_obj, m_jsnapshot_created_methodID,
+                      GET_CPLUSPLUS_POINTER(newSnapshot));
+
+  if (env->ExceptionCheck()) {
+    // exception thrown from CallVoidMethod
+    env->ExceptionDescribe();  // print out exception to stderr
+    releaseJniEnv(attached_thread);
+    return;
+  }
+
+  releaseJniEnv(attached_thread);
+}
+}  // namespace ROCKSDB_NAMESPACE