atg.search.cache

Class SearchQueryCache

java.lang.Object

atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

atg.nucleus.GenericService

atg.search.cache.SearchQueryCache

All Implemented Interfaces:

atg.core.logging.Logging, atg.core.logging.TraceLogging, atg.naming.AbsoluteNameable, NameContextBindingListener, NameContextElement, atg.naming.NameContextParentable, NameResolver, AdminableService, atg.nucleus.Configured, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, java.util.EventListener

public class SearchQueryCache
extends GenericService

This class is used to create components for storing performed queries (request/response) and documents in a cache.

Search information is not stored in persistent store and only available as a live value while getting response from Search Engine (QueryRequest and QueryRequest.Response objects). That is why it is required to place it in some kind of session history cache, so such information can be accessible later.

The cache is designed as a Least Recently Used (LRU) cache, so when new object is arrived and cache is full, new object will replace oldest one. All items are being expired from the cache only when it is full. The administrator is able to tune both the number of request/response objects in a history cache(via queryCount property) and the number of documents that should be cached per search(via documentCount property). It is also possible to specify -1 as unlimited size for cache.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CLASS_VERSION Class version string

Fields inherited from class atg.nucleus.GenericService

SERVICE_INFO_KEY

Fields inherited from interface atg.nucleus.logging.TraceApplicationLogging

DEFAULT_LOG_TRACE_STATUS

Fields inherited from interface atg.nucleus.logging.ApplicationLogging

DEFAULT_LOG_DEBUG_STATUS, DEFAULT_LOG_ERROR_STATUS, DEFAULT_LOG_INFO_STATUS, DEFAULT_LOG_WARNING_STATUS

Constructor Summary

Constructors

Constructor and Description
SearchQueryCache()

Method Summary

Methods

Modifier and Type	Method and Description
void	doStartService() This is called after a Service has been created, placed into the naming hierarchy, and initialized with its configured property values.
atg.search.cache.CacheElement	get(java.lang.String pQueryId) Returns CacheElement object (request/response) from the cache by query Id
Document	getDocument(java.lang.String pUrl) Returns document object from the cache by URL
Document	getDocumentById(java.lang.String pId) Returns document object from the cache by id
atg.search.cache.SearchDocumentCache	getDocumentCache() Returns documentCache property.
int	getDocumentCount() Returns property documentCount.
int	getQueryCount() Returns property queryCount.
void	put(java.lang.String pQueryId, atg.search.cache.CacheElement pCacheElement) Puts CacheElement object (request/response) into the cache by query Id
java.lang.String	putDocument(java.lang.String pQueryId, Document pDocument) Puts document object into the cache
void	setDocumentCache(atg.search.cache.SearchDocumentCache pDocumentCache) Sets documentCache property.
void	setDocumentCount(int pDocumentCount) Sets documentCount property.
void	setQueryCount(int pQueryCount) Sets property queryCount.

Methods inherited from class atg.nucleus.GenericService

addLogListener, createAdminServlet, doStopService, getAbsoluteName, getAdminServlet, getAdminServletOutputStreamEncoding, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isAdminServletUseServletOutputStream, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, reResolveThis, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setAdminServletOutputStreamEncoding, setAdminServletUseServletOutputStream, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogDebugTrace, vlogError, vlogError, vlogError, vlogError, vlogInfo, vlogInfo, vlogInfo, vlogInfo, vlogTrace, vlogTrace, vlogTrace, vlogTrace, vlogWarning, vlogWarning, vlogWarning, vlogWarning

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

Constructor Detail

SearchQueryCache

public SearchQueryCache()

Method Detail

getQueryCount

public int getQueryCount()

Returns property queryCount. This property contains count of CacheElement items which we are storing at LRU cache.

Returns:

queryCount property

setQueryCount

public void setQueryCount(int pQueryCount)

Sets property queryCount. This property contains count of CacheElement items which we are storing at LRU cache.

Parameters:

pQueryCount - New value for queryCount property

getDocumentCount

public int getDocumentCount()

Returns property documentCount. This property contains count of document items which we are storing at LRU cache per each search.

Returns:

documentCount property

setDocumentCount

public void setDocumentCount(int pDocumentCount)

Sets documentCount property. This property contains count of document items which we are storing at LRU cache per each search.

Parameters:

pDocumentCount - New value for documentCount property

getDocumentCache

public atg.search.cache.SearchDocumentCache getDocumentCache()

Returns documentCache property. This property contains reference to the SearchDocumentCache component used for storing documents.

Returns:

documentCache property

setDocumentCache

public void setDocumentCache(atg.search.cache.SearchDocumentCache pDocumentCache)

Sets documentCache property. This property contains reference to the SearchDocumentCache component used for storing documents.

Parameters:

pDocumentCache - New value for documentCache property

put

public void put(java.lang.String pQueryId,
       atg.search.cache.CacheElement pCacheElement)

Puts CacheElement object (request/response) into the cache by query Id

Parameters:

pQueryId - Query Id

pCacheElement - CacheElement object

get

public atg.search.cache.CacheElement get(java.lang.String pQueryId)

Returns CacheElement object (request/response) from the cache by query Id

Parameters:

pQueryId - Query Id

Returns:

CacheElement object

putDocument

public java.lang.String putDocument(java.lang.String pQueryId,
                           Document pDocument)

Puts document object into the cache

Parameters:

pQueryId - Query Id

pDocument - document object

Returns:

Id value for document

getDocument

public Document getDocument(java.lang.String pUrl)

Returns document object from the cache by URL

Parameters:

pUrl - document URL

Returns:

document object

getDocumentById

public Document getDocumentById(java.lang.String pId)

Returns document object from the cache by id

Parameters:

pId - document Id

Returns:

document object

doStartService

public void doStartService()
                    throws ServiceException

This is called after a Service has been created, placed into the naming hierarchy, and initialized with its configured property values. This method should start any processes required to run the service.

Overrides:

doStartService in class GenericService

Throws:

ServiceException - if the Service had a problem starting up