com::cosylab::cdb::jdal::DALImpl Class Reference

Inheritance diagram for com::cosylab::cdb::jdal::DALImpl:

Collaboration diagram for com::cosylab::cdb::jdal::DALImpl:

Classes
class	Filter
Public Member Functions
void	loadFactory ()
void	recoverClients ()
String	getRecordPath (String curl)
void	parseNode (DALNode node, XMLHandler xmlSolver) throws SAXException, IOException, AcsJCDBXMLErrorEx
XMLHandler	loadRecords (String curl, boolean toString) throws AcsJCDBRecordDoesNotExistEx, AcsJCDBXMLErrorEx
boolean	wasCacheLimitReached ()
String	get_DAO (String curl) throws CDBRecordDoesNotExistEx, CDBXMLErrorEx
synchronized String	internal_get_DAO (String curl, boolean precacheStage) throws CDBRecordDoesNotExistEx, CDBXMLErrorEx
synchronized DAO	get_DAO_Servant (String curl) throws CDBRecordDoesNotExistEx, CDBXMLErrorEx
void	shutdown ()
void	loadListeners ()
boolean	saveListeners ()
int	add_change_listener (DALChangeListener listener)
void	listen_for_changes (String curl, int listenerID)
void	remove_change_listener (int listenerID)
void	clear_cache (String curl)
void	clear_cache_all ()
String	list_nodes (String name)
String	list_daos (String name)
String	configuration_name ()
SAXParser	getSaxParser ()
boolean	isShutdown ()
Static Public Member Functions
static String	getSchemas (String root, Logger logger)
static void	getFiles (String filePath, LinkedHashMap< String, String > map)
Static Public Attributes
static final String	SCHEMA_VALIDATION_FEATURE_ID
static final String	EXTERNAL_SCHEMA_LOCATION_PROPERTY_ID
Protected Member Functions
void	object_changed (String curl)
File	getStorageFile ()
void	cleanListenedCurls ()
Protected Attributes
final AtomicLong	totalDALInvocationCounter
Package Functions
	DALImpl (String args[], ORB orb_val, POA poa_val, Logger logger)
Private Member Functions
String	getSchemas ()
XMLHandler	loadRecord (String curl, boolean toString) throws AcsJCDBRecordDoesNotExistEx, AcsJCDBXMLErrorEx
void	checkCache ()
boolean	checkCache (boolean tryOnly)
void	clearCache ()
String	getFromCache (String curl)
void	putToCache (String curl, String xml)
void	logRecordNotExistWithRepeatGuard (String curl)
Static Private Member Functions
static String	removeXMLs (String list)
Private Attributes
ORB	orb
POA	poa
SAXParserFactory	factory
SAXParser	saxParser
String	m_root
HashMap< String, DAO >	daoMap = new HashMap<String, DAO>()
HashMap< String, ArrayList < Integer > >	listenedCurls = new HashMap<String, ArrayList<Integer>>()
File	listenersStorageFile = null
Random	idPool = new Random()
HashMap< Integer, DALChangeListener >	regListeners = new HashMap<Integer, DALChangeListener>()
boolean	recoveryRead = true
DALNode	rootNode = null
final Logger	m_logger
volatile boolean	shutdown = false
Object	shutdownLock = new Object()
final MultipleRepeatGuard	recordNotExistLogRepeatGuard
final int	recordNotExistLogRepeatGuardTimeSeconds
LinkedHashMap< String, String >	cache = new LinkedHashMap<String, String>()
volatile boolean	cacheLimitReached = false

Detailed Description

A note about the inheritance structure used in this module: The writable variant of the DAL interface delegates to an instance of DALImpl for all JDALOperations, see WDALBaseImpl. It only adds the implementation of the WDALOperations methods.

Constructor & Destructor Documentation

com::cosylab::cdb::jdal::DALImpl::DALImpl	(	String	args[],
		ORB	orb_val,
		POA	poa_val,
		Logger	logger
	)			`[inline, package]`

C'tor

Parameters:

	args
	orb_val
	poa_val

References checkCache(), loadFactory(), m_logger, m_root, orb, poa, recordNotExistLogRepeatGuard, recordNotExistLogRepeatGuardTimeSeconds, recoveryRead, shutdown(), shutdownLock, and totalDALInvocationCounter.

Member Function Documentation

int com::cosylab::cdb::jdal::DALImpl::add_change_listener ( DALChangeListener listener ) [inline]

References idPool, listenedCurls, regListeners, and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::add_change_listener().

boolean com::cosylab::cdb::jdal::DALImpl::checkCache ( boolean tryOnly ) [inline, private]

References cache, cacheLimitReached, and m_logger.

void com::cosylab::cdb::jdal::DALImpl::checkCache ( ) [inline, private]

Referenced by DALImpl(), internal_get_DAO(), and putToCache().

void com::cosylab::cdb::jdal::DALImpl::cleanListenedCurls ( ) [inline, protected]

Cleans listened curls from invalid listeners to avoid repeatedly calling invalid listeners

References listenedCurls, and regListeners.

Referenced by clear_cache().

void com::cosylab::cdb::jdal::DALImpl::clear_cache ( String curl ) [inline]

References cleanListenedCurls(), listenedCurls, com::cosylab::CDB::DALChangeListenerOperations::object_changed(), object_changed(), regListeners, saveListeners(), and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::clear_cache(), and clear_cache_all().

void com::cosylab::cdb::jdal::DALImpl::clear_cache_all ( ) [inline]

Implements com::cosylab::CDB::JDALOperations.

References clear_cache(), clearCache(), com::cosylab::cdb::jdal::DALNode::getRoot(), listenedCurls, loadFactory(), m_root, rootNode, and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::clear_cache_all(), and recoverClients().

void com::cosylab::cdb::jdal::DALImpl::clearCache ( ) [inline, private]

References cache.

Referenced by clear_cache_all().

String com::cosylab::cdb::jdal::DALImpl::configuration_name ( ) [inline]

Implements com::cosylab::CDB::DALOperations.

References totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::configuration_name().

String com::cosylab::cdb::jdal::DALImpl::get_DAO ( String curl ) throws CDBRecordDoesNotExistEx, CDBXMLErrorEx [inline]

returns full expanded XML string

References internal_get_DAO().

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::get_DAO(), and com::cosylab::cdb::jdal::WDALImpl::set_DAO().

synchronized DAO com::cosylab::cdb::jdal::DALImpl::get_DAO_Servant ( String curl ) throws CDBRecordDoesNotExistEx, CDBXMLErrorEx [inline]

create DAO servant with requested XML

References daoMap, loadRecords(), logRecordNotExistWithRepeatGuard(), m_logger, com::cosylab::cdb::jdal::XMLHandler::m_rootNode, poa, alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setErrorString(), alma::cdbErrType::wrappers::AcsJCDBRecordDoesNotExistEx::toCDBRecordDoesNotExistEx(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::toCDBXMLErrorEx(), and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::get_DAO_Servant(), and com::cosylab::cdb::jdal::WDALImpl::get_WDAO_Servant().

static void com::cosylab::cdb::jdal::DALImpl::getFiles	(	String	filePath,
		LinkedHashMap< String, String >	map
	)			`[inline, static]`

Adds all *.xsd files from filePath directory if file already exists in map it is skipped

Referenced by getSchemas().

String com::cosylab::cdb::jdal::DALImpl::getFromCache ( String curl ) [inline, private]

References cache, and m_logger.

Referenced by internal_get_DAO().

String com::cosylab::cdb::jdal::DALImpl::getRecordPath ( String curl ) [inline]

References m_root.

Referenced by com::cosylab::cdb::jdal::WDALImpl::getNodeFile(), loadRecord(), and parseNode().

SAXParser com::cosylab::cdb::jdal::DALImpl::getSaxParser ( ) [inline]

Returns:

References saxParser.

Referenced by com::cosylab::cdb::jdal::WDALImpl::validateXML().

static String com::cosylab::cdb::jdal::DALImpl::getSchemas	(	String	root,
		Logger	logger
	)			`[inline, static]`

returns string of URIs separated by ' ' for all schema files in root/schemas and directories list given by ACS.cdbpath environment variable

This method is public static to be used more easily in the HibernateDAL (com.cosylab.cdb.jdal.XSDElementTypeResolver::initializeParser())

References getFiles().

String com::cosylab::cdb::jdal::DALImpl::getSchemas ( ) [inline, private]

References m_logger, and m_root.

Referenced by loadFactory().

File com::cosylab::cdb::jdal::DALImpl::getStorageFile ( ) [inline, protected]

Returns:: File

References listenersStorageFile, and m_logger.

Referenced by loadListeners(), and saveListeners().

synchronized String com::cosylab::cdb::jdal::DALImpl::internal_get_DAO	(	String	curl,
		boolean	precacheStage
	)			throws CDBRecordDoesNotExistEx, CDBXMLErrorEx `[inline]`

returns full expanded XML string

References checkCache(), getFromCache(), loadRecords(), logRecordNotExistWithRepeatGuard(), m_logger, putToCache(), shutdown(), alma::cdbErrType::wrappers::AcsJCDBRecordDoesNotExistEx::toCDBRecordDoesNotExistEx(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::toCDBXMLErrorEx(), com::cosylab::cdb::jdal::XMLHandler::toString(), and totalDALInvocationCounter.

Referenced by get_DAO().

boolean com::cosylab::cdb::jdal::DALImpl::isShutdown ( ) [inline]

References shutdown().

String com::cosylab::cdb::jdal::DALImpl::list_daos ( String name ) [inline]

References com::cosylab::cdb::jdal::XMLTreeNode::getNodesMap(), com::cosylab::cdb::jdal::DALNode::getRoot(), com::cosylab::cdb::jdal::DALNode::list(), loadRecord(), m_root, com::cosylab::cdb::jdal::XMLHandler::m_rootNode, removeXMLs(), rootNode, and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::list_daos().

String com::cosylab::cdb::jdal::DALImpl::list_nodes ( String name ) [inline]

References com::cosylab::cdb::jdal::DALNode::getRoot(), com::cosylab::cdb::jdal::DALNode::list(), m_root, removeXMLs(), rootNode, and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::list_nodes().

void com::cosylab::cdb::jdal::DALImpl::listen_for_changes	(	String	curl,
		int	listenerID
	)			`[inline]`

References listenedCurls, saveListeners(), and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::listen_for_changes().

void com::cosylab::cdb::jdal::DALImpl::loadFactory ( ) [inline]

References EXTERNAL_SCHEMA_LOCATION_PROPERTY_ID, factory, getSchemas(), m_logger, saxParser, and SCHEMA_VALIDATION_FEATURE_ID.

Referenced by clear_cache_all(), and DALImpl().

void com::cosylab::cdb::jdal::DALImpl::loadListeners ( ) [inline]

References getStorageFile(), listenedCurls, orb, and regListeners.

Referenced by recoverClients().

XMLHandler com::cosylab::cdb::jdal::DALImpl::loadRecord	(	String	curl,
		boolean	toString
	)			throws AcsJCDBRecordDoesNotExistEx, AcsJCDBXMLErrorEx `[inline, private]`

References getRecordPath(), com::cosylab::cdb::jdal::XMLHandler::m_errorString, m_logger, saxParser, alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setCurl(), alma::cdbErrType::wrappers::AcsJCDBRecordDoesNotExistEx::setCurl(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setErrorString(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setFilename(), and com::cosylab::cdb::jdal::XMLHandler::setMarkArrays().

Referenced by list_daos(), and loadRecords().

XMLHandler com::cosylab::cdb::jdal::DALImpl::loadRecords	(	String	curl,
		boolean	toString
	)			throws AcsJCDBRecordDoesNotExistEx, AcsJCDBXMLErrorEx `[inline]`

Returns a xml constructed of all records below given curl

Parameters:

	curl
	toString

Returns:

Exceptions:

	AcsJCDBRecordDoesNotExistEx
	AcsJCDBXMLErrorEx

References com::cosylab::cdb::jdal::DALNode::findNode(), com::cosylab::cdb::jdal::XMLHandler::getChild(), alma::cdbErrType::wrappers::AcsJCDBRecordDoesNotExistEx::getCurl(), com::cosylab::cdb::jdal::DALNode::getRoot(), com::cosylab::cdb::jdal::DALNode::isSimple(), loadRecord(), m_logger, m_root, parseNode(), rootNode, com::cosylab::cdb::jdal::XMLHandler::setAutoCloseStartingElement(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setCurl(), alma::cdbErrType::wrappers::AcsJCDBRecordDoesNotExistEx::setCurl(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setErrorString(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setFilename(), and com::cosylab::cdb::jdal::XMLHandler::setMarkArrays().

Referenced by get_DAO_Servant(), and internal_get_DAO().

void com::cosylab::cdb::jdal::DALImpl::logRecordNotExistWithRepeatGuard ( String curl ) [inline, private]

Uses a repeat guard (recordNotExistLogRepeatGuard) to limit the occasionally excessive logs about a requested node not existing. The limiting is time based, so that the first log is logged, while all other logs from intervals of recordNotExistLogRepeatGuardTimeSeconds seconds are logged as a single record.

Parameters:

curl

The requested node that does not exist.

References m_logger, and recordNotExistLogRepeatGuard.

Referenced by get_DAO_Servant(), and internal_get_DAO().

void com::cosylab::cdb::jdal::DALImpl::object_changed ( String curl ) [inline, protected]

Parameters:

curl

References daoMap, and com::cosylab::CDB::DAOOperations::destroy().

Referenced by clear_cache().

void com::cosylab::cdb::jdal::DALImpl::parseNode	(	DALNode	node,
		XMLHandler	xmlSolver
	)			throws SAXException, IOException, AcsJCDBXMLErrorEx `[inline]`

References getRecordPath(), m_logger, saxParser, alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setCurl(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setErrorString(), alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setFilename(), and alma::cdbErrType::wrappers::AcsJCDBXMLErrorEx::setNodename().

Referenced by loadRecords().

void com::cosylab::cdb::jdal::DALImpl::putToCache	(	String	curl,
		String	xml
	)			`[inline, private]`

References cache, checkCache(), and m_logger.

Referenced by internal_get_DAO().

void com::cosylab::cdb::jdal::DALImpl::recoverClients ( ) [inline]

Recovery related implementation. Load list of listeners from the recovery file and notifies them to clear cache. NOTICE: This method should be called when DAL POA is alrady initialized and active. NOTE: Method execution depends on recoveryRead variable.

Implements com::cosylab::cdb::jdal::Recoverer.

References clear_cache_all(), loadListeners(), and recoveryRead.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::recoverClients().

void com::cosylab::cdb::jdal::DALImpl::remove_change_listener ( int listenerID ) [inline]

Implements com::cosylab::CDB::DALOperations.

References listenedCurls, regListeners, saveListeners(), and totalDALInvocationCounter.

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::remove_change_listener().

static String com::cosylab::cdb::jdal::DALImpl::removeXMLs ( String list ) [inline, static, private]

Referenced by list_daos(), and list_nodes().

boolean com::cosylab::cdb::jdal::DALImpl::saveListeners ( ) [inline]

Returns:: boolean

References getStorageFile(), listenedCurls, orb, and regListeners.

Referenced by clear_cache(), listen_for_changes(), and remove_change_listener().

void com::cosylab::cdb::jdal::DALImpl::shutdown ( ) [inline]

Implements com::cosylab::CDB::DALOperations.

References orb, shutdownLock, and totalDALInvocationCounter.

Referenced by DALImpl(), internal_get_DAO(), and isShutdown().

boolean com::cosylab::cdb::jdal::DALImpl::wasCacheLimitReached ( ) [inline]

References cacheLimitReached.

Referenced by com::cosylab::cdb::jdal::Server::preloadCache().

Member Data Documentation

LinkedHashMap<String, String> com::cosylab::cdb::jdal::DALImpl::cache = new LinkedHashMap<String, String>() [private]

Referenced by checkCache(), clearCache(), getFromCache(), and putToCache().

volatile boolean com::cosylab::cdb::jdal::DALImpl::cacheLimitReached = false [private]

Referenced by checkCache(), and wasCacheLimitReached().

HashMap<String, DAO> com::cosylab::cdb::jdal::DALImpl::daoMap = new HashMap<String, DAO>() [private]

Referenced by get_DAO_Servant(), and object_changed().

final String com::cosylab::cdb::jdal::DALImpl::EXTERNAL_SCHEMA_LOCATION_PROPERTY_ID [static]

Initial value:

                "http://apache.org/xml/properties/schema/external-schemaLocation"

Property for setting the mapping of URIs to XML schemas.

Referenced by loadFactory().

SAXParserFactory com::cosylab::cdb::jdal::DALImpl::factory [private]

Referenced by loadFactory().

Random com::cosylab::cdb::jdal::DALImpl::idPool = new Random() [private]

Referenced by add_change_listener().

HashMap<String, ArrayList<Integer> > com::cosylab::cdb::jdal::DALImpl::listenedCurls = new HashMap<String, ArrayList<Integer>>() [private]

Referenced by add_change_listener(), cleanListenedCurls(), clear_cache(), clear_cache_all(), listen_for_changes(), loadListeners(), remove_change_listener(), and saveListeners().

File com::cosylab::cdb::jdal::DALImpl::listenersStorageFile = null [private]

Referenced by getStorageFile().

final Logger com::cosylab::cdb::jdal::DALImpl::m_logger [private]

Referenced by checkCache(), DALImpl(), get_DAO_Servant(), getFromCache(), getSchemas(), getStorageFile(), internal_get_DAO(), loadFactory(), loadRecord(), loadRecords(), logRecordNotExistWithRepeatGuard(), parseNode(), and putToCache().

String com::cosylab::cdb::jdal::DALImpl::m_root [private]

Referenced by clear_cache_all(), DALImpl(), getRecordPath(), getSchemas(), list_daos(), list_nodes(), and loadRecords().

ORB com::cosylab::cdb::jdal::DALImpl::orb [private]

Referenced by DALImpl(), loadListeners(), saveListeners(), and shutdown().

POA com::cosylab::cdb::jdal::DALImpl::poa [private]

Referenced by DALImpl(), and get_DAO_Servant().

final MultipleRepeatGuard com::cosylab::cdb::jdal::DALImpl::recordNotExistLogRepeatGuard [private]

repeat guard for "Curl 'xyz' does not exist" messages.

Referenced by DALImpl(), and logRecordNotExistWithRepeatGuard().

final int com::cosylab::cdb::jdal::DALImpl::recordNotExistLogRepeatGuardTimeSeconds [private]

The time in seconds for which recordNotExistLogRepeatGuard will collect identical log records to log them together upon a subsequent log request.

Note that the repeat guard will not actively flush out the "aggregate" log message, but will wait for the next log request, possibly coming much later than the number of seconds given here.

Referenced by DALImpl().

boolean com::cosylab::cdb::jdal::DALImpl::recoveryRead = true [private]

Referenced by DALImpl(), and recoverClients().

HashMap<Integer, DALChangeListener> com::cosylab::cdb::jdal::DALImpl::regListeners = new HashMap<Integer, DALChangeListener>() [private]

Referenced by add_change_listener(), cleanListenedCurls(), clear_cache(), loadListeners(), remove_change_listener(), and saveListeners().

DALNode com::cosylab::cdb::jdal::DALImpl::rootNode = null [private]

Referenced by clear_cache_all(), list_daos(), list_nodes(), and loadRecords().

SAXParser com::cosylab::cdb::jdal::DALImpl::saxParser [private]

Referenced by getSaxParser(), loadFactory(), loadRecord(), and parseNode().

final String com::cosylab::cdb::jdal::DALImpl::SCHEMA_VALIDATION_FEATURE_ID [static]

Initial value:

                "http://apache.org/xml/features/validation/schema"

Schema validation feature id (http://apache.org/xml/features/validation/schema).

Referenced by loadFactory().

volatile boolean com::cosylab::cdb::jdal::DALImpl::shutdown = false [private]

Referenced by com::cosylab::cdb::jdal::WDALBaseImpl::shutdown().

Object com::cosylab::cdb::jdal::DALImpl::shutdownLock = new Object() [private]

Referenced by DALImpl(), and shutdown().

final AtomicLong com::cosylab::cdb::jdal::DALImpl::totalDALInvocationCounter [protected]

Referenced by add_change_listener(), com::cosylab::cdb::jdal::WDALImpl::add_node(), clear_cache(), clear_cache_all(), configuration_name(), DALImpl(), get_DAO_Servant(), com::cosylab::cdb::jdal::WDALImpl::get_WDAO_Servant(), internal_get_DAO(), list_daos(), list_nodes(), listen_for_changes(), remove_change_listener(), com::cosylab::cdb::jdal::WDALImpl::remove_node(), com::cosylab::cdb::jdal::WDALImpl::set_DAO(), and shutdown().

The documentation for this class was generated from the following file:

DALImpl.java

com::cosylab::cdb::jdal::DALImpl Class Reference

Classes

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Package Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation