-/*
- * Copyright 2017-present Open Networking Foundation
- *
- * Licensed 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.
- */
-package io.atomix.storage.statistics;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.io.File;
-import java.lang.management.ManagementFactory;
-
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-
-/**
- * Atomix storage statistics.
- */
-public class StorageStatistics {
- private static final Logger LOGGER = LoggerFactory.getLogger(StorageStatistics.class);
-
- private final File file;
- private final MBeanServer mBeanServer;
-
- public StorageStatistics(File file) {
- this.file = file;
- this.mBeanServer = ManagementFactory.getPlatformMBeanServer();
- }
-
- /**
- * Returns the amount of usable space remaining.
- *
- * @return the amount of usable space remaining
- */
- public long getUsableSpace() {
- return file.getUsableSpace();
- }
-
- /**
- * Returns the amount of free space remaining.
- *
- * @return the amount of free space remaining
- */
- public long getFreeSpace() {
- return file.getFreeSpace();
- }
-
- /**
- * Returns the total amount of space.
- *
- * @return the total amount of space
- */
- public long getTotalSpace() {
- return file.getTotalSpace();
- }
-
- /**
- * Returns the amount of free memory remaining.
- *
- * @return the amount of free memory remaining if successful, -1 return indicates failure.
- */
- public long getFreeMemory() {
- try {
- return (long) mBeanServer.getAttribute(new ObjectName("java.lang", "type", "OperatingSystem"), "FreePhysicalMemorySize");
- } catch (Exception e) {
- if (LOGGER.isDebugEnabled()) {
- LOGGER.debug("An exception occurred during memory check", e);
- }
- }
- return -1;
- }
-
- /**
- * Returns the total amount of memory.
- *
- * @return the total amount of memory if successful, -1 return indicates failure.
- */
- public long getTotalMemory() {
- try {
- return (long) mBeanServer.getAttribute(new ObjectName("java.lang", "type", "OperatingSystem"), "TotalPhysicalMemorySize");
- } catch (Exception e) {
- if (LOGGER.isDebugEnabled()) {
- LOGGER.debug("An exception occurred during memory check", e);
- }
- }
- return -1;
- }
-}