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| | | /**
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| | | * Dynamically loads and reloads a properties file by keeping track of the last
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| | | * modification date.
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| | | * |
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| | | *
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| | | * @author James Moger
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| | | * |
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| | | *
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| | | */
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| | | public class FileSettings extends IStoredSettings {
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| | |
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| | | protected final File propertiesFile;
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| | | protected File propertiesFile;
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| | |
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| | | private final Properties properties = new Properties();
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| | |
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| | | private volatile long lastModified;
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| | | |
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| | |
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| | | private volatile boolean forceReload;
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| | |
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| | | public FileSettings(String file) {
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| | | public FileSettings() {
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| | | super(FileSettings.class);
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| | | }
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| | |
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| | | public FileSettings(String file) {
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| | | this();
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| | | load(file);
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| | | }
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| | |
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| | | public void load(String file) {
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| | | this.propertiesFile = new File(file);
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| | | }
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| | |
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| | | /**
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| | | * Merges the provided settings into this instance. This will also
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| | | * set the target file for this instance IFF it is unset AND the merge
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| | | * source is also a FileSettings. This is a little sneaky.
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| | | */
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| | | @Override
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| | | public void merge(IStoredSettings settings) {
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| | | super.merge(settings);
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| | |
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| | | // sneaky: set the target file from the merge source
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| | | if (propertiesFile == null && settings instanceof FileSettings) {
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| | | this.propertiesFile = ((FileSettings) settings).propertiesFile;
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| | | }
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| | | }
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| | |
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| | | /**
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| | |
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| | | */
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| | | @Override
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| | | protected synchronized Properties read() {
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| | | if (propertiesFile.exists() && (forceReload || (propertiesFile.lastModified() > lastModified))) {
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| | | if (propertiesFile != null && propertiesFile.exists() && (forceReload || (propertiesFile.lastModified() > lastModified))) {
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| | | FileInputStream is = null;
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| | | try {
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| | | Properties props = new Properties();
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| | | return properties;
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| | | }
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| | |
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| | | @Override
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| | | public boolean saveSettings() {
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| | | String content = FileUtils.readContent(propertiesFile, "\n");
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| | | for (String key : removals) {
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| | | String regex = "(?m)^(" + regExEscape(key) + "\\s*+=\\s*+)"
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| | | + "(?:[^\r\n\\\\]++|\\\\(?:\r?\n|\r|.))*+$";
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| | | content = content.replaceAll(regex, "");
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| | | }
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| | | removals.clear();
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| | |
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| | | FileUtils.writeContent(propertiesFile, content);
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| | | // manually set the forceReload flag because not all JVMs support real
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| | | // millisecond resolution of lastModified. (issue-55)
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| | | forceReload = true;
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| | | return true;
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| | | }
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| | |
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| | | /**
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| | | * Updates the specified settings in the settings file.
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| | | */
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| | | @Override
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| | | public synchronized boolean saveSettings(Map<String, String> settings) {
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| | | String content = FileUtils.readContent(propertiesFile, "\n");
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| | | for (Map.Entry<String, String> setting:settings.entrySet()) {
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| | |
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| | | }
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| | | FileUtils.writeContent(propertiesFile, content);
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| | | // manually set the forceReload flag because not all JVMs support real
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| | | // millisecond resolution of lastModified. (issue-55) |
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| | | // millisecond resolution of lastModified. (issue-55)
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| | | forceReload = true;
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| | | return true;
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| | | }
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| | | |
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| | |
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| | | private String regExEscape(String input) {
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| | | return input.replace(".", "\\.").replace("$", "\\$").replace("{", "\\{");
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| | | }
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