blob: c60dd4c82ec913bfc2eaf8876e06e8cc07493b71 [file] [log] [blame]
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/**
* RocksDB is deprecating the RocksObject's finalizer that cleans up native
* resources. In fact, the finalizer is removed in the new version of RocksDB
* as per https://github.com/facebook/rocksdb/commit/99d86252b. That poses a
* requirement for RocksDb's applications to explicitly close RocksObject
* instances themselves to avoid leaking native resources. The general approach
* is to close RocksObjects with try-with-resource statement.
* Yet, this is not always an easy option in Ozone we need a mechanism to
* manage and detect leaks.
*
* This package contains wrappers and utilities to catch RocksObject
* instantiates in Ozone, intercept their finalizers and assert if the created
* instances are closed properly before being GCed.
*/
package org.apache.hadoop.hdds.utils.db.managed;