io.druid.server.lookup

Class PollingLookupFactory

java.lang.Object

io.druid.server.lookup.PollingLookupFactory

All Implemented Interfaces:

com.google.common.base.Supplier<LookupExtractor>, LookupExtractorFactory

public class PollingLookupFactory
extends Object
implements LookupExtractorFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
	PollingLookupFactory(org.joda.time.Period pollPeriod, DataFetcher dataFetcher, PollingCacheFactory cacheFactory)
protected	PollingLookupFactory(org.joda.time.Period pollPeriod, DataFetcher dataFetcher, PollingCacheFactory pollingCacheFactory, PollingLookup pollingLookup)

Method Summary

Modifier and Type	Method and Description
boolean	close() This method will be called to stop the LookupExtractor upon deletion.
boolean	equals(Object o)
PollingLookup	get()
LookupIntrospectHandler	getIntrospectHandler()
boolean	replaces(LookupExtractorFactory lookupExtractorFactory) Determine if this LookupExtractorFactory should replace some other LookupExtractorFactory.
boolean	start() This method will be called to start the LookupExtractor upon registered Calling start multiple times should return true if successfully started.

Methods inherited from class java.lang.Object

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

Constructor Detail

PollingLookupFactory

public PollingLookupFactory(org.joda.time.Period pollPeriod,
                            DataFetcher dataFetcher,
                            PollingCacheFactory cacheFactory)

PollingLookupFactory

protected PollingLookupFactory(org.joda.time.Period pollPeriod,
                               DataFetcher dataFetcher,
                               PollingCacheFactory pollingCacheFactory,
                               PollingLookup pollingLookup)

Method Detail

start

public boolean start()

Description copied from interface: LookupExtractorFactory

This method will be called to start the LookupExtractor upon registered Calling start multiple times should return true if successfully started.

Specified by:

start in interface LookupExtractorFactory

Returns:

Returns false if is not successfully started the LookupExtractor otherwise returns true.

close

public boolean close()

Description copied from interface: LookupExtractorFactory

This method will be called to stop the LookupExtractor upon deletion. Calling this method multiple times should always return true if successfully closed.

Specified by:

close in interface LookupExtractorFactory

Returns:

Returns false if not successfully closed the LookupExtractor otherwise returns true

replaces

public boolean replaces(@Nullable
                        LookupExtractorFactory lookupExtractorFactory)

Description copied from interface: LookupExtractorFactory

Determine if this LookupExtractorFactory should replace some other LookupExtractorFactory. This is used to implement no-down-time

Specified by:

replaces in interface LookupExtractorFactory

Parameters:

lookupExtractorFactory - Some other LookupExtractorFactory which might need replaced

Returns:

`true` if the other should be replaced by this one. `false` if this one should not replace the other factory

getIntrospectHandler

@Nullable
public LookupIntrospectHandler getIntrospectHandler()

Specified by:

getIntrospectHandler in interface LookupExtractorFactory

Returns:

Returns the actual introspection request handler, can return null if it is not supported. This will be called once per HTTP request to introspect the actual lookup.

get

public PollingLookup get()

Specified by:

get in interface com.google.common.base.Supplier<LookupExtractor>

equals

public boolean equals(Object o)

Overrides:

equals in class Object