/* | |
* Copyright 1999-2011 Alibaba Group. | |
* | |
* 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 com.alibaba.dubbo.common.status.support; | |
import com.alibaba.dubbo.common.Extension; | |
import com.alibaba.dubbo.common.status.Status; | |
import com.alibaba.dubbo.common.status.StatusChecker; | |
/** | |
* MemoryStatus | |
* | |
* @author william.liangf | |
*/ | |
@Extension("memory") | |
public class MemoryStatusChecker implements StatusChecker { | |
public Status check() { | |
Runtime runtime = Runtime.getRuntime(); | |
long freeMemory = runtime.freeMemory(); | |
long totalMemory = runtime.totalMemory(); | |
long maxMemory = runtime.maxMemory(); | |
boolean ok = (maxMemory - (totalMemory - freeMemory) > 2048); // 剩余空间小于2M报警 | |
String msg = "max:" + (maxMemory / 1024 / 1024) + "M,total:" | |
+ (totalMemory / 1024 / 1024) + "M,used:" + ((totalMemory / 1024 / 1024) - (freeMemory / 1024 / 1024)) + "M"; | |
return new Status(ok ? Status.Level.OK : Status.Level.WARN, msg); | |
} | |
} |