001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.gui.preferences.imagery; 003 004import static org.openstreetmap.josm.tools.I18n.tr; 005 006import java.awt.Color; 007import java.awt.Component; 008import java.awt.GridBagLayout; 009import java.awt.event.ActionEvent; 010import java.awt.event.ActionListener; 011import java.util.ArrayList; 012import java.util.Collections; 013import java.util.Comparator; 014import java.util.List; 015import java.util.Map; 016import java.util.Map.Entry; 017import java.util.Set; 018import java.util.concurrent.ConcurrentHashMap; 019import java.util.concurrent.ExecutorService; 020import java.util.concurrent.Executors; 021 022import javax.swing.AbstractAction; 023import javax.swing.AbstractCellEditor; 024import javax.swing.Action; 025import javax.swing.Icon; 026import javax.swing.JButton; 027import javax.swing.JLabel; 028import javax.swing.JPanel; 029import javax.swing.JScrollPane; 030import javax.swing.JTable; 031import javax.swing.UIManager; 032import javax.swing.border.LineBorder; 033import javax.swing.table.DefaultTableModel; 034import javax.swing.table.TableCellEditor; 035import javax.swing.table.TableCellRenderer; 036import javax.swing.table.TableColumn; 037import javax.swing.table.TableModel; 038 039import org.apache.commons.jcs.access.CacheAccess; 040import org.apache.commons.jcs.engine.stats.behavior.ICacheStats; 041import org.apache.commons.jcs.engine.stats.behavior.IStatElement; 042import org.apache.commons.jcs.engine.stats.behavior.IStats; 043import org.openstreetmap.josm.Main; 044import org.openstreetmap.josm.data.cache.BufferedImageCacheEntry; 045import org.openstreetmap.josm.gui.layer.TMSLayer; 046import org.openstreetmap.josm.gui.layer.WMSLayer; 047import org.openstreetmap.josm.gui.layer.WMTSLayer; 048import org.openstreetmap.josm.gui.util.GuiHelper; 049import org.openstreetmap.josm.tools.GBC; 050import org.openstreetmap.josm.tools.Pair; 051import org.openstreetmap.josm.tools.Utils; 052 053/** 054 * Panel for cache content management. 055 * 056 * @author Wiktor Niesiobędzki 057 * 058 */ 059public class CacheContentsPanel extends JPanel { 060 061 /** 062 * 063 * Class based on: http://www.camick.com/java/source/ButtonColumn.java 064 * https://tips4java.wordpress.com/2009/07/12/table-button-column/ 065 * 066 */ 067 private static final class ButtonColumn extends AbstractCellEditor implements TableCellRenderer, TableCellEditor, ActionListener { 068 private final Action action; 069 private final JButton renderButton; 070 private final JButton editButton; 071 private Object editorValue; 072 073 private ButtonColumn() { 074 this(null); 075 } 076 077 private ButtonColumn(Action action) { 078 this.action = action; 079 renderButton = new JButton(); 080 editButton = new JButton(); 081 editButton.setFocusPainted(false); 082 editButton.addActionListener(this); 083 editButton.setBorder(new LineBorder(Color.BLUE)); 084 } 085 086 @Override 087 public Object getCellEditorValue() { 088 return editorValue; 089 } 090 091 @Override 092 public void actionPerformed(ActionEvent e) { 093 this.action.actionPerformed(e); 094 } 095 096 @Override 097 public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { 098 this.editorValue = value; 099 if (value == null) { 100 editButton.setText(""); 101 editButton.setIcon(null); 102 } else if (value instanceof Icon) { 103 editButton.setText(""); 104 editButton.setIcon((Icon) value); 105 } else { 106 editButton.setText(value.toString()); 107 editButton.setIcon(null); 108 } 109 this.editorValue = value; 110 return editButton; 111 } 112 113 @Override 114 public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, 115 boolean hasFocus, int row, int column) { 116 if (isSelected) { 117 renderButton.setForeground(table.getSelectionForeground()); 118 renderButton.setBackground(table.getSelectionBackground()); 119 } else { 120 renderButton.setForeground(table.getForeground()); 121 renderButton.setBackground(UIManager.getColor("Button.background")); 122 } 123 124 renderButton.setFocusPainted(hasFocus); 125 126 if (value == null) { 127 renderButton.setText(""); 128 renderButton.setIcon(null); 129 } else if (value instanceof Icon) { 130 renderButton.setText(""); 131 renderButton.setIcon((Icon) value); 132 } else { 133 renderButton.setText(value.toString()); 134 renderButton.setIcon(null); 135 } 136 return renderButton; 137 } 138 139 } 140 141 private final transient ExecutorService executor = 142 Executors.newSingleThreadExecutor(Utils.newThreadFactory(getClass() + "-%d", Thread.NORM_PRIORITY)); 143 144 /** 145 * Creates cache content panel 146 */ 147 public CacheContentsPanel() { 148 super(new GridBagLayout()); 149 executor.submit(new Runnable() { 150 @Override 151 public void run() { 152 addToPanel(TMSLayer.getCache(), "TMS"); 153 addToPanel(WMSLayer.getCache(), "WMS"); 154 addToPanel(WMTSLayer.getCache(), "WMTS"); 155 } 156 }); 157 executor.shutdown(); 158 } 159 160 private void addToPanel(final CacheAccess<String, BufferedImageCacheEntry> cache, final String name) { 161 final Long cacheSize = getCacheSize(cache); 162 final TableModel tableModel = getTableModel(cache); 163 164 GuiHelper.runInEDT(new Runnable() { 165 @Override 166 public void run() { 167 add( 168 new JLabel(tr("{0} cache, total cache size: {1} bytes", name, cacheSize)), 169 GBC.eol().insets(5, 5, 0, 0)); 170 171 add( 172 new JScrollPane(getTableForCache(cache, tableModel)), 173 GBC.eol().fill(GBC.BOTH)); 174 } 175 }); 176 } 177 178 private static Long getCacheSize(CacheAccess<String, BufferedImageCacheEntry> cache) { 179 ICacheStats stats = cache.getStatistics(); 180 for (IStats cacheStats: stats.getAuxiliaryCacheStats()) { 181 for (IStatElement<?> statElement: cacheStats.getStatElements()) { 182 if ("Data File Length".equals(statElement.getName())) { 183 Object val = statElement.getData(); 184 if (val instanceof Long) { 185 return (Long) val; 186 } 187 188 } 189 } 190 } 191 return Long.valueOf(-1); 192 } 193 194 private static String[][] getCacheStats(CacheAccess<String, BufferedImageCacheEntry> cache) { 195 Set<String> keySet = cache.getCacheControl().getKeySet(); 196 Map<String, int[]> temp = new ConcurrentHashMap<>(); // use int[] as a Object reference to int, gives better performance 197 for (String key: keySet) { 198 String[] keyParts = key.split(":", 2); 199 if (keyParts.length == 2) { 200 int[] counter = temp.get(keyParts[0]); 201 if (counter == null) { 202 temp.put(keyParts[0], new int[]{1}); 203 } else { 204 counter[0]++; 205 } 206 } else { 207 Main.warn("Could not parse the key: {0}. No colon found", key); 208 } 209 } 210 211 List<Pair<String, Integer>> sortedStats = new ArrayList<>(); 212 for (Entry<String, int[]> e: temp.entrySet()) { 213 sortedStats.add(new Pair<>(e.getKey(), e.getValue()[0])); 214 } 215 Collections.sort(sortedStats, new Comparator<Pair<String, Integer>>() { 216 @Override 217 public int compare(Pair<String, Integer> o1, Pair<String, Integer> o2) { 218 return -1 * o1.b.compareTo(o2.b); 219 } 220 }); 221 String[][] ret = new String[sortedStats.size()][3]; 222 int index = 0; 223 for (Pair<String, Integer> e: sortedStats) { 224 ret[index] = new String[]{e.a, e.b.toString(), tr("Clear")}; 225 index++; 226 } 227 return ret; 228 } 229 230 private static JTable getTableForCache(final CacheAccess<String, BufferedImageCacheEntry> cache, final TableModel tableModel) { 231 final JTable ret = new JTable(tableModel); 232 233 ButtonColumn buttonColumn = new ButtonColumn( 234 new AbstractAction() { 235 @Override 236 public void actionPerformed(ActionEvent e) { 237 int row = ret.convertRowIndexToModel(ret.getEditingRow()); 238 tableModel.setValueAt("0", row, 1); 239 cache.remove(ret.getValueAt(row, 0).toString() + ':'); 240 } 241 }); 242 TableColumn tableColumn = ret.getColumnModel().getColumn(2); 243 tableColumn.setCellRenderer(buttonColumn); 244 tableColumn.setCellEditor(buttonColumn); 245 return ret; 246 } 247 248 private static DefaultTableModel getTableModel(final CacheAccess<String, BufferedImageCacheEntry> cache) { 249 return new DefaultTableModel( 250 getCacheStats(cache), 251 new String[]{tr("Cache name"), tr("Object Count"), tr("Clear")}) { 252 @Override 253 public boolean isCellEditable(int row, int column) { 254 return column == 2; 255 } 256 }; 257 } 258}