private void readMigrations(
SortedMap<Long, List<ConfigMigrationStategy>> configMigrations, URL url) throws IOException {
InputStreamReader r = null;
try {
r = new InputStreamReader(url.openStream(), ConfigUtilConstants.DEFAULT_TEXT_ENCODING);
XStream x = createXStream();
ConfigManagerMigrations migrations = (ConfigManagerMigrations) x.fromXML(r);
for (Migration m : migrations.getMigrationList()) {
long versionTarget = m.getTargetVersion();
String className = m.getMigrationClass();
String[] constructorArguments = m.getArguments();
List<ConfigMigrationStategy> configMigrationForVersionTarget =
configMigrations.get(versionTarget);
if (configMigrationForVersionTarget == null) {
configMigrationForVersionTarget = new ArrayList();
configMigrations.put(versionTarget, configMigrationForVersionTarget);
}
ConfigMigrationStategy configMigration =
createMigrationStrategy(versionTarget, className, constructorArguments);
configMigrationForVersionTarget.add(configMigration);
}
} finally {
try {
if (r != null) r.close();
} catch (IOException e) {
ConfigLogImplementation.logMethods.error(
"Failed to close ConfigMigration InputStream from URL " + url, e);
}
}
}
// util to write the first config migrations file, solve the chicken an egg problem. After that we
// can do it manually
public static void main(String[] args) {
Migration c =
new Migration(201011181800L, NullMigrationStrategy.class.getName(), new String[] {});
Migration c1 =
new Migration(
201103201834L,
RegexMigrationStrategy.class.getName(),
new String[] {"Last Refresh\\w", "Last Refresh Time"});
ConfigManagerMigrations m = new ConfigManagerMigrations();
m.addMigration(c);
m.addMigration(c1);
writeMigrationsFile(m, new File(args[0]));
}