/**
* Retrieves the backends from the current configuration file. The backends must be enabled to be
* listed. No operations should be done within a disabled backend.
*
* @return A backend list.
*/
static List<String> getIndexedBackendsFromConfig() {
final SearchRequest sr =
Requests.newSearchRequest(
"",
SearchScope.WHOLE_SUBTREE,
"(&(objectclass=ds-cfg-pluggable-backend)(ds-cfg-enabled=true))",
"ds-cfg-base-dn");
final List<String> listBackends = new LinkedList<>();
try (final EntryReader entryReader = searchConfigFile(sr)) {
while (entryReader.hasNext()) {
final Entry entry = entryReader.readEntry();
listBackends.addAll(entry.parseAttribute("ds-cfg-base-dn").asSetOfString());
}
} catch (Exception ex) {
logger.error(LocalizableMessage.raw(ex.getMessage()));
}
return listBackends;
}
/**
* Creates a new file in the config/upgrade folder. The new file is a concatenation of entries of
* all files contained in the config/schema folder.
*
* @param folder The folder containing the schema files.
* @param revision The revision number of the current binary version.
* @throws Exception If we cannot read the files contained in the folder where the schema files
* are supposed to be, or the file has errors.
*/
static void updateConfigUpgradeSchemaFile(final File folder, final String revision)
throws Exception {
// We need to upgrade the schema.ldif.<rev> file contained in the
// config/upgrade folder otherwise, we cannot enable the backend at
// server's start. We need to read all files contained in config/schema
// and add all attribute/object classes in this new super entry which
// will be read at start-up.
Entry theNewSchemaEntry = new LinkedHashMapEntry();
LDIFEntryReader reader = null;
LDIFEntryWriter writer = null;
try {
if (folder.isDirectory()) {
final FilenameFilter filter = new SchemaConfigManager.SchemaFileFilter();
for (final File f : folder.listFiles(filter)) {
logger.debug(LocalizableMessage.raw(String.format("Processing %s", f.getAbsolutePath())));
reader = new LDIFEntryReader(new FileInputStream(f));
try {
while (reader.hasNext()) {
final Entry entry = reader.readEntry();
theNewSchemaEntry.setName(entry.getName());
for (final Attribute at : entry.getAllAttributes()) {
theNewSchemaEntry.addAttribute(at);
}
}
} catch (Exception ex) {
throw new Exception(
"Error parsing existing schema file " + f.getName() + " - " + ex.getMessage(), ex);
}
}
// Creates a File object representing
// config/upgrade/schema.ldif.revision which the server creates
// the first time it starts if there are schema customizations.
final File destination =
new File(
configDirectory,
Installation.UPGRADE_PATH + File.separator + "schema.ldif." + revision);
// Checks if the parent exists (eg. embedded
// server doesn't seem to provide that folder)
File parentDirectory = destination.getParentFile();
if (!parentDirectory.exists()) {
logger.debug(
LocalizableMessage.raw(
String.format("Parent file of %s doesn't exist", destination.getPath())));
parentDirectory.mkdirs();
logger.debug(
LocalizableMessage.raw(
String.format("Parent directory %s created.", parentDirectory.getPath())));
}
if (!destination.exists()) {
destination.createNewFile();
}
logger.debug(
LocalizableMessage.raw(
String.format("Writing entries in %s.", destination.getAbsolutePath())));
writer = new LDIFEntryWriter(new FileOutputStream(destination));
writer.writeEntry(theNewSchemaEntry);
logger.debug(
LocalizableMessage.raw(
String.format(
"%s created and completed successfully.", destination.getAbsolutePath())));
}
} finally {
StaticUtils.close(reader, writer);
}
}
/**
* Updates the config file during the upgrade process.
*
* @param configPath The original path to the file.
* @param filter The filter to select entries. Only useful for modify change type.
* @param changeType The change type which must be applied to ldif lines.
* @param ldifLines The change record ldif lines. For ADD change type, the first line must be the
* dn. For DELETE change type, the first and only line must be the dn.
* @throws IOException If an Exception occurs during the input output methods.
* @return The changes number that have occurred.
*/
static int updateConfigFile(
final String configPath,
final Filter filter,
final ChangeOperationType changeType,
final String... ldifLines)
throws IOException {
final File original = new File(configPath);
final File copyConfig = File.createTempFile("copyConfig", ".tmp", original.getParentFile());
int changeCount = 0;
LDIFEntryReader entryReader = null;
LDIFEntryWriter writer = null;
try {
final Schema schema = getUpgradeSchema();
entryReader = new LDIFEntryReader(new FileInputStream(configPath)).setSchema(schema);
writer = new LDIFEntryWriter(new FileOutputStream(copyConfig));
writer.setWrapColumn(80);
// Writes the header on the new file.
writer.writeComment(INFO_CONFIG_FILE_HEADER.get());
writer.setWrapColumn(0);
boolean entryAlreadyExist = false;
DN ldifDN = null;
if (filter == null && (changeType == ADD || changeType == DELETE)) {
// The first line should start with dn:
ldifDN = DN.valueOf(ldifLines[0].replaceFirst("dn: ", ""));
}
final Filter f = filter != null ? filter : Filter.alwaysFalse();
final Matcher matcher = f.matcher(schema);
while (entryReader.hasNext()) {
Entry entry = entryReader.readEntry();
final DN entryDN = entry.getName();
// Searching for the related entries
if (changeType == MODIFY && matcher.matches(entry) == ConditionResult.TRUE) {
try {
final ModifyRequest mr =
Requests.newModifyRequest(readLDIFLines(entryDN, changeType, ldifLines));
entry = Entries.modifyEntryPermissive(entry, mr.getModifications());
changeCount++;
logger.debug(
LocalizableMessage.raw("The following entry has been modified : %s", entryDN));
} catch (Exception ex) {
logger.error(LocalizableMessage.raw(ex.getMessage()));
}
}
if (entryDN.equals(ldifDN)) {
logger.debug(LocalizableMessage.raw("Entry %s found", entryDN));
entryAlreadyExist = true;
if (changeType == DELETE) {
entry = null;
changeCount++;
logger.debug(
LocalizableMessage.raw("The following entry has been deleted : %s", entryDN));
}
}
if (entry != null) {
writer.writeEntry(entry);
}
}
if (changeType == ADD && !entryAlreadyExist) {
final AddRequest ar = Requests.newAddRequest(ldifLines);
writer.writeEntry(ar);
logger.debug(
LocalizableMessage.raw(
"Entry successfully added %s in %s", ldifDN, original.getAbsolutePath()));
changeCount++;
}
} catch (Exception ex) {
throw new IOException(ex.getMessage());
} finally {
// The reader and writer must be close before renaming files.
// Otherwise it causes exceptions under windows OS.
StaticUtils.close(entryReader, writer);
}
try {
// Renaming the file, overwriting previous one.
rename(copyConfig, new File(configPath));
} catch (IOException e) {
logger.error(LocalizableMessage.raw(e.getMessage()));
deleteRecursively(original);
throw e;
}
return changeCount;
}