/**
* 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;
}
/**
* Returns the definition of the selected attribute / object class OID.
*
* @param schemaEntry The selected schema entry to search on.
* @param type The type of the research. ("objectClasses" or "attributeTypes")
* @param oid The OID of the element to search for.
* @return The byte string definition of the element.
*/
private static ByteString getSchemaElement(
final Entry schemaEntry, final String type, final String oid) {
final Attribute attribute = schemaEntry.getAttribute(type);
final MatchingRule mrule = CoreSchema.getObjectIdentifierFirstComponentMatchingRule();
Assertion assertion;
try {
assertion = mrule.getAssertion(ByteString.valueOfUtf8(oid));
for (final ByteString value : attribute) {
final ByteString nvalue = mrule.normalizeAttributeValue(value);
if (assertion.matches(nvalue).toBoolean()) {
return value;
}
}
} catch (DecodeException e) {
throw new IllegalStateException(e);
}
throw new IllegalStateException(ERR_UPGRADE_UNKNOWN_OC_ATT.get(type, oid).toString());
}
/**
* 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);
}
}
/**
* This task adds new attributes / object classes to the specified destination file. The new
* attributes and object classes must be originally defined in the template file.
*
* @param templateFile The file in which the new attribute/object definition can be read.
* @param destination The file where we want to add the new definitions.
* @param attributes Those attributes needed to be inserted into the new destination file.
* @param objectClasses Those object classes needed to be inserted into the new destination file.
* @return An integer which represents each time an attribute / object class is inserted
* successfully to the destination file.
* @throws IOException If an unexpected IO error occurred while reading the entry.
* @throws IllegalStateException Failure to find an attribute in the template schema indicates
* either a programming error (e.g. typo in the attribute name) or template corruption.
* Upgrade should stop.
*/
static int updateSchemaFile(
final File templateFile,
final File destination,
final String[] attributes,
final String[] objectClasses)
throws IOException, IllegalStateException {
int changeCount = 0;
LDIFEntryReader templateReader = null;
LDIFEntryReader destinationReader = null;
LDIFEntryWriter destinationWriter = null;
File copy = null;
try {
templateReader = new LDIFEntryReader(new FileInputStream(templateFile));
if (!templateReader.hasNext()) {
// Unless template are corrupted, this should not happen.
throw new IOException(
ERR_UPGRADE_CORRUPTED_TEMPLATE.get(templateFile.getPath()).toString());
}
final Entry templateSchemaEntry = templateReader.readEntry();
destinationReader = new LDIFEntryReader(new FileInputStream(destination));
if (!destinationReader.hasNext()) {
// Unless template are corrupted, this should not happen.
throw new IOException(ERR_UPGRADE_CORRUPTED_TEMPLATE.get(destination.getPath()).toString());
}
final Entry destinationSchemaEntry = destinationReader.readEntry();
if (attributes != null) {
for (final String att : attributes) {
final ByteString attributeType =
getSchemaElement(templateSchemaEntry, "attributeTypes", att);
destinationSchemaEntry.getAttribute("attributeTypes").add(attributeType);
changeCount++;
logger.debug(LocalizableMessage.raw(String.format("Added %s", attributeType)));
}
}
if (objectClasses != null) {
for (final String oc : objectClasses) {
final ByteString objectClass = getSchemaElement(templateSchemaEntry, "objectClasses", oc);
destinationSchemaEntry.getAttribute("objectClasses").add(objectClass);
changeCount++;
logger.trace("Added %s", objectClass);
}
}
// Then writes the new schema entry.
copy = File.createTempFile("copySchema", ".tmp", destination.getParentFile());
final FileOutputStream fos = new FileOutputStream(copy);
destinationWriter = new LDIFEntryWriter(fos);
destinationWriter.setWrapColumn(79);
// Copy comments to fos (get License and first comments only).
writeFileHeaderComments(templateFile, destinationWriter);
// Writes the entry after.
destinationWriter.writeEntry(destinationSchemaEntry);
} finally {
// Readers and writer must be close before writing files.
// This causes exceptions under windows OS.
StaticUtils.close(templateReader, destinationReader, destinationWriter);
}
// Renames the copy to make it the new schema file.
try {
rename(copy, destination);
} catch (IOException e) {
logger.error(LocalizableMessage.raw(e.getMessage()));
deleteRecursively(copy);
throw e;
}
return changeCount;
}
/**
* 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;
}