001 /* 002 * Copyright (C) 2012 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 020 package org.crsh.text.formatter; 021 022 import org.crsh.text.Color; 023 import org.crsh.text.LineReader; 024 import org.crsh.text.RenderAppendable; 025 import org.crsh.text.Renderer; 026 027 import java.lang.management.MemoryUsage; 028 029 public class MemoryUsageRenderer extends Renderer { 030 031 /** . */ 032 private final MemoryUsage usage; 033 034 public MemoryUsageRenderer(MemoryUsage usage) { 035 this.usage = usage; 036 } 037 038 @Override 039 public int getActualWidth() { 040 return 32; 041 } 042 043 @Override 044 public int getMinWidth() { 045 return 4; 046 } 047 048 @Override 049 public int getMinHeight(int width) { 050 return 1; 051 } 052 053 @Override 054 public int getActualHeight(int width) { 055 return 2; 056 } 057 058 @Override 059 public LineReader reader(int width) { 060 return reader(width, 2); 061 } 062 063 @Override 064 public LineReader reader(final int width, final int height) { 065 return new LineReader() { 066 067 /** . */ 068 private int index = 0; 069 070 public boolean hasLine() { 071 return index < height; 072 } 073 public void renderLine(RenderAppendable to) throws IllegalStateException { 074 if (!hasLine()) { 075 throw new IllegalStateException(); 076 } 077 long range = usage.getMax() - usage.getInit(); 078 Color previous = null; 079 080 if (usage.getMax() > 0) { 081 long a = (width * usage.getUsed()) / (usage.getMax()); 082 long b = (width * usage.getCommitted()) / (usage.getMax()); 083 for (int i = 0;i < width;i++) { 084 Color current; 085 if (i >= b) { 086 // MAX 087 current = Color.green; 088 } else if (i >= a) { 089 // COMMITED 090 current = Color.blue; 091 } else { 092 // USED 093 current = Color.cyan; 094 } 095 if (previous != current) { 096 if (previous != null) { 097 to.leaveStyle(); 098 } 099 to.enterStyle(current.bg()); 100 previous = current; 101 } 102 to.append(' '); 103 } 104 if (previous != null) { 105 to.leaveStyle(); 106 } 107 } else { 108 for (int i = 0;i < width;i++) { 109 to.append(' '); 110 } 111 } 112 index++; 113 } 114 }; 115 } 116 }