org.apache.solr.core

Class RequestHandlers.LazyRequestHandlerWrapper

java.lang.Object

org.apache.solr.core.RequestHandlers.LazyRequestHandlerWrapper

All Implemented Interfaces:

SolrInfoMBean, SolrRequestHandler

Enclosing class:

RequestHandlers

private static final class RequestHandlers.LazyRequestHandlerWrapper
extends java.lang.Object
implements SolrRequestHandler, SolrInfoMBean

The LazyRequestHandlerWrapper wraps any SolrRequestHandler. Rather then instanciate and initalize the handler on startup, this wrapper waits until it is actually called. This should only be used for handlers that are unlikely to be used in the normal lifecycle. You can enable lazy loading in solrconfig.xml using:

  <requestHandler name="..." class="..." startup="lazy">
    ...
  </requestHandler>
 

This is a private class - if there is a real need for it to be public, it could move

Since:

solr 1.2

Version:

$Id: RequestHandlers.java 1306137 2012-03-28 03:30:52Z dsmiley $

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.solr.core.SolrInfoMBean

SolrInfoMBean.Category

Field Summary

Fields

Modifier and Type	Field and Description
private NamedList	_args
private java.lang.String	_className
private SolrRequestHandler	_handler
private SolrCore	core

Constructor Summary

Constructors

Constructor and Description
LazyRequestHandlerWrapper(SolrCore core, java.lang.String className, NamedList args)

Method Summary

Modifier and Type	Method and Description
SolrInfoMBean.Category	getCategory() Purpose of this Class
java.lang.String	getDescription() Simple one or two line description
java.net.URL[]	getDocs() Documentation URL list.
java.lang.String	getHandlerClass()
java.lang.String	getName() Simple common usage name, e.g.
java.lang.String	getSource() CVS Source, SVN Source, etc
java.lang.String	getSourceId() CVS Id, SVN Id, etc
NamedList	getStatistics() Any statistics this instance would like to be publicly available via the Solr Administration interface.
java.lang.String	getVersion() Simple common usage version, e.g.
SolrRequestHandler	getWrappedHandler()
void	handleRequest(SolrQueryRequest req, SolrQueryResponse rsp) Wait for the first request before initializing the wrapped handler
void	init(NamedList args) In normal use, this function will not be called

Methods inherited from class java.lang.Object

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

Field Detail

core

private final SolrCore core

_className

private java.lang.String _className

_args

private NamedList _args

_handler

private SolrRequestHandler _handler

Constructor Detail

LazyRequestHandlerWrapper

public LazyRequestHandlerWrapper(SolrCore core,
                                 java.lang.String className,
                                 NamedList args)

Method Detail

init

public void init(NamedList args)

In normal use, this function will not be called

Specified by:

init in interface SolrRequestHandler

handleRequest

public void handleRequest(SolrQueryRequest req,
                          SolrQueryResponse rsp)

Wait for the first request before initializing the wrapped handler

Specified by:

handleRequest in interface SolrRequestHandler

getWrappedHandler

public SolrRequestHandler getWrappedHandler()

getHandlerClass

public java.lang.String getHandlerClass()

getName

public java.lang.String getName()

Description copied from interface: SolrInfoMBean

Simple common usage name, e.g. BasicQueryHandler, or fully qualified clas name.

Specified by:

getName in interface SolrInfoMBean

getDescription

public java.lang.String getDescription()

Description copied from interface: SolrInfoMBean

Simple one or two line description

Specified by:

getDescription in interface SolrInfoMBean

getVersion

public java.lang.String getVersion()

Description copied from interface: SolrInfoMBean

Simple common usage version, e.g. 2.0

Specified by:

getVersion in interface SolrInfoMBean

getSourceId

public java.lang.String getSourceId()

Description copied from interface: SolrInfoMBean

CVS Id, SVN Id, etc

Specified by:

getSourceId in interface SolrInfoMBean

getSource

public java.lang.String getSource()

Description copied from interface: SolrInfoMBean

CVS Source, SVN Source, etc

Specified by:

getSource in interface SolrInfoMBean

getDocs

public java.net.URL[] getDocs()

Description copied from interface: SolrInfoMBean

Documentation URL list.

Suggested documentation URLs: Homepage for sponsoring project, FAQ on class usage, Design doc for class, Wiki, bug reporting URL, etc...

Specified by:

getDocs in interface SolrInfoMBean

getCategory

public SolrInfoMBean.Category getCategory()

Description copied from interface: SolrInfoMBean

Purpose of this Class

Specified by:

getCategory in interface SolrInfoMBean

getStatistics

public NamedList getStatistics()

Description copied from interface: SolrInfoMBean

Any statistics this instance would like to be publicly available via the Solr Administration interface.

Any Object type may be stored in the list, but only the toString() representation will be used.

Specified by:

getStatistics in interface SolrInfoMBean