/* | |
* 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.remoting; | |
import java.net.NetworkInterface; | |
import java.net.SocketException; | |
import java.text.DecimalFormat; | |
import java.util.ArrayList; | |
import java.util.Enumeration; | |
import java.util.List; | |
/** | |
* PerformanceUtils | |
* | |
* @author william.liangf | |
*/ | |
public class PerformanceUtils { | |
public static String getProperty(String key, String defaultValue) { | |
String value = System.getProperty(key); | |
if (value == null || value.trim().length() == 0 || value.startsWith("$")) { | |
return defaultValue; | |
} | |
return value.trim(); | |
} | |
public static int getIntProperty(String key, int defaultValue) { | |
String value = System.getProperty(key); | |
if (value == null || value.trim().length() == 0 || value.startsWith("$")) { | |
return defaultValue; | |
} | |
return Integer.parseInt(value.trim()); | |
} | |
public static boolean getBooleanProperty(String key, boolean defaultValue) { | |
String value = System.getProperty(key); | |
if (value == null || value.trim().length() == 0 || value.startsWith("$")) { | |
return defaultValue; | |
} | |
return Boolean.parseBoolean(value.trim()); | |
} | |
public static List<String> getEnvironment() { | |
List<String> environment = new ArrayList<String>(); | |
environment.add("OS: " + System.getProperty("os.name") + " " + System.getProperty("os.version") + " " + System.getProperty("os.arch", "")); | |
environment.add("CPU: " + Runtime.getRuntime().availableProcessors() + " cores"); | |
environment.add("JVM: " + System.getProperty("java.vm.name") + " " + System.getProperty("java.runtime.version")); | |
environment.add("Memory: " + DecimalFormat.getIntegerInstance().format(Runtime.getRuntime().totalMemory()) | |
+ " bytes (Max: " + DecimalFormat.getIntegerInstance().format(Runtime.getRuntime().maxMemory()) + " bytes)"); | |
NetworkInterface ni = PerformanceUtils.getNetworkInterface(); | |
if (ni != null) { | |
environment.add("Network: " + ni.getDisplayName()); | |
} | |
return environment; | |
} | |
private static final int WIDTH = 64; | |
public static void printSeparator() { | |
StringBuilder pad = new StringBuilder(); | |
for (int i = 0; i < WIDTH; i ++) { | |
pad.append("-"); | |
} | |
System.out.println("+" + pad + "+"); | |
} | |
public static void printBorder() { | |
StringBuilder pad = new StringBuilder(); | |
for (int i = 0; i < WIDTH; i ++) { | |
pad.append("="); | |
} | |
System.out.println("+" + pad + "+"); | |
} | |
public static void printBody(String msg) { | |
StringBuilder pad = new StringBuilder(); | |
int len = WIDTH - msg.length() - 1; | |
if (len > 0) { | |
for (int i = 0; i < len; i ++) { | |
pad.append(" "); | |
} | |
} | |
System.out.println("| " + msg + pad + "|"); | |
} | |
public static void printHeader(String msg) { | |
StringBuilder pad = new StringBuilder(); | |
int len = WIDTH - msg.length(); | |
if (len > 0) { | |
int half = len / 2; | |
for (int i = 0; i < half; i ++) { | |
pad.append(" "); | |
} | |
} | |
System.out.println("|" + pad + msg + pad + ((len % 2 == 0) ? "" : " ") + "|"); | |
} | |
public static NetworkInterface getNetworkInterface() { | |
try { | |
Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); | |
if (interfaces != null) { | |
while (interfaces.hasMoreElements()) { | |
try { | |
return interfaces.nextElement(); | |
} catch (Throwable e) { | |
} | |
} | |
} | |
} catch (SocketException e) { | |
} | |
return null; | |
} | |
} |