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 JButton editButton; 071 private Object editorValue; 072 073 private ButtonColumn(Action action) { 074 this.action = action; 075 renderButton = new JButton(); 076 editButton = new JButton(); 077 editButton.setFocusPainted(false); 078 editButton.addActionListener(this); 079 editButton.setBorder(new LineBorder(Color.BLUE)); 080 } 081 082 @Override 083 public Object getCellEditorValue() { 084 return editorValue; 085 } 086 087 @Override 088 public void actionPerformed(ActionEvent e) { 089 this.action.actionPerformed(e); 090 } 091 092 @Override 093 public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { 094 this.editorValue = value; 095 if (value == null) { 096 editButton.setText(""); 097 editButton.setIcon(null); 098 } else if (value instanceof Icon) { 099 editButton.setText(""); 100 editButton.setIcon((Icon) value); 101 } else { 102 editButton.setText(value.toString()); 103 editButton.setIcon(null); 104 } 105 this.editorValue = value; 106 return editButton; 107 } 108 109 @Override 110 public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, 111 boolean hasFocus, int row, int column) { 112 if (isSelected) { 113 renderButton.setForeground(table.getSelectionForeground()); 114 renderButton.setBackground(table.getSelectionBackground()); 115 } else { 116 renderButton.setForeground(table.getForeground()); 117 renderButton.setBackground(UIManager.getColor("Button.background")); 118 } 119 120 renderButton.setFocusPainted(hasFocus); 121 122 if (value == null) { 123 renderButton.setText(""); 124 renderButton.setIcon(null); 125 } else if (value instanceof Icon) { 126 renderButton.setText(""); 127 renderButton.setIcon((Icon) value); 128 } else { 129 renderButton.setText(value.toString()); 130 renderButton.setIcon(null); 131 } 132 return renderButton; 133 } 134 135 } 136 137 private final transient ExecutorService executor = 138 Executors.newSingleThreadExecutor(Utils.newThreadFactory(getClass() + "-%d", Thread.NORM_PRIORITY)); 139 140 /** 141 * Creates cache content panel 142 */ 143 public CacheContentsPanel() { 144 super(new GridBagLayout()); 145 executor.submit(new Runnable() { 146 @Override 147 public void run() { 148 addToPanel(TMSLayer.getCache(), "TMS"); 149 addToPanel(WMSLayer.getCache(), "WMS"); 150 addToPanel(WMTSLayer.getCache(), "WMTS"); 151 } 152 }); 153 executor.shutdown(); 154 } 155 156 private void addToPanel(final CacheAccess<String, BufferedImageCacheEntry> cache, final String name) { 157 final Long cacheSize = getCacheSize(cache); 158 final TableModel tableModel = getTableModel(cache); 159 160 GuiHelper.runInEDT(new Runnable() { 161 @Override 162 public void run() { 163 add( 164 new JLabel(tr("{0} cache, total cache size: {1} bytes", name, cacheSize)), 165 GBC.eol().insets(5, 5, 0, 0)); 166 167 add( 168 new JScrollPane(getTableForCache(cache, tableModel)), 169 GBC.eol().fill(GBC.BOTH)); 170 } 171 }); 172 } 173 174 private static Long getCacheSize(CacheAccess<String, BufferedImageCacheEntry> cache) { 175 ICacheStats stats = cache.getStatistics(); 176 for (IStats cacheStats: stats.getAuxiliaryCacheStats()) { 177 for (IStatElement<?> statElement: cacheStats.getStatElements()) { 178 if ("Data File Length".equals(statElement.getName())) { 179 Object val = statElement.getData(); 180 if (val instanceof Long) { 181 return (Long) val; 182 } 183 184 } 185 } 186 } 187 return Long.valueOf(-1); 188 } 189 190 private static String[][] getCacheStats(CacheAccess<String, BufferedImageCacheEntry> cache) { 191 Set<String> keySet = cache.getCacheControl().getKeySet(); 192 Map<String, int[]> temp = new ConcurrentHashMap<>(); // use int[] as a Object reference to int, gives better performance 193 for (String key: keySet) { 194 String[] keyParts = key.split(":", 2); 195 if (keyParts.length == 2) { 196 int[] counter = temp.get(keyParts[0]); 197 if (counter == null) { 198 temp.put(keyParts[0], new int[]{1}); 199 } else { 200 counter[0]++; 201 } 202 } else { 203 Main.warn("Could not parse the key: {0}. No colon found", key); 204 } 205 } 206 207 List<Pair<String, Integer>> sortedStats = new ArrayList<>(); 208 for (Entry<String, int[]> e: temp.entrySet()) { 209 sortedStats.add(new Pair<>(e.getKey(), e.getValue()[0])); 210 } 211 Collections.sort(sortedStats, new Comparator<Pair<String, Integer>>() { 212 @Override 213 public int compare(Pair<String, Integer> o1, Pair<String, Integer> o2) { 214 return -1 * o1.b.compareTo(o2.b); 215 } 216 }); 217 String[][] ret = new String[sortedStats.size()][3]; 218 int index = 0; 219 for (Pair<String, Integer> e: sortedStats) { 220 ret[index] = new String[]{e.a, e.b.toString(), tr("Clear")}; 221 index++; 222 } 223 return ret; 224 } 225 226 private JTable getTableForCache(final CacheAccess<String, BufferedImageCacheEntry> cache, final TableModel tableModel) { 227 final JTable ret = new JTable(tableModel); 228 229 ButtonColumn buttonColumn = new ButtonColumn( 230 new AbstractAction() { 231 @Override 232 public void actionPerformed(ActionEvent e) { 233 int row = ret.convertRowIndexToModel(ret.getEditingRow()); 234 tableModel.setValueAt("0", row, 1); 235 cache.remove(ret.getValueAt(row, 0) + ":"); 236 } 237 }); 238 TableColumn tableColumn = ret.getColumnModel().getColumn(2); 239 tableColumn.setCellRenderer(buttonColumn); 240 tableColumn.setCellEditor(buttonColumn); 241 return ret; 242 } 243 244 private static DefaultTableModel getTableModel(final CacheAccess<String, BufferedImageCacheEntry> cache) { 245 final DefaultTableModel tableModel = new DefaultTableModel( 246 getCacheStats(cache), 247 new String[]{tr("Cache name"), tr("Object Count"), tr("Clear")}) { 248 @Override 249 public boolean isCellEditable(int row, int column) { 250 return column == 2; 251 } 252 }; 253 return tableModel; 254 } 255}