Package org.graylog2.lookup.caches

Class NullCache

java.lang.Object

com.google.common.util.concurrent.AbstractIdleService

org.graylog2.plugin.lookup.LookupCache

org.graylog2.lookup.caches.NullCache

All Implemented Interfaces:

com.google.common.util.concurrent.Service

public class NullCache
extends LookupCache

The cache that doesn't. Used in place when no cache is wanted, having a null implementation saves us ugly null checks.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NullCache.Config
static class	NullCache.Descriptor
static interface	NullCache.Factory

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME

Constructor Summary

Constructors

Constructor	Description
NullCache(String id, String name, LookupCacheConfiguration c, com.codahale.metrics.MetricRegistry metricRegistry)

Method Summary

Modifier and Type	Method	Description
protected void	doStart()
protected void	doStop()
LookupResult	get(LookupCacheKey key, Callable<LookupResult> loader)
LookupResult	getIfPresent(LookupCacheKey key)
void	purge()
void	purge(LookupCacheKey purgeKey)

Methods inherited from class org.graylog2.plugin.lookup.LookupCache

clearError, entryCount, getConfig, getError, id, incrHitCount, incrHitCount, incrMissCount, incrMissCount, incrTotalCount, incrTotalCount, lookupTimer, name, setError, setId, shutDown, startUp

Methods inherited from class com.google.common.util.concurrent.AbstractIdleService

addListener, awaitRunning, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, awaitTerminated, executor, failureCause, isRunning, serviceName, startAsync, state, stopAsync, toString

Methods inherited from class java.lang.Object

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

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

Constructor Details

NullCache

@Inject
public NullCache(String id,
 String name,
 LookupCacheConfiguration c,
 com.codahale.metrics.MetricRegistry metricRegistry)

Method Details

doStart

protected void doStart()
                throws Exception

Specified by:

doStart in class LookupCache

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Specified by:

doStop in class LookupCache

Throws:

Exception

get

public LookupResult get(LookupCacheKey key,
 Callable<LookupResult> loader)

Specified by:

get in class LookupCache

getIfPresent

public LookupResult getIfPresent(LookupCacheKey key)

Specified by:

getIfPresent in class LookupCache

purge

public void purge()

Specified by:

purge in class LookupCache

purge

public void purge(LookupCacheKey purgeKey)

Specified by:

purge in class LookupCache