Package org.apache.druid.client

Class CacheUtil

java.lang.Object

org.apache.druid.client.CacheUtil

public class CacheUtil
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	CacheUtil.ServerType

Constructor Summary

Constructors

Constructor	Description
CacheUtil()

Method Summary

Modifier and Type	Method	Description
static Cache.NamedKey	computeResultLevelCacheKey(byte[] resultLevelCacheIdentifier)
static Cache.NamedKey	computeSegmentCacheKey(String segmentId, SegmentDescriptor descriptor, byte[] queryCacheKey)
static <T> boolean	isPopulateResultCache(Query<T> query, CacheStrategy<T,Object,Query<T>> cacheStrategy, CacheConfig cacheConfig, CacheUtil.ServerType serverType)	Returns whether the result-level cache should be populated for a particular query.
static <T> boolean	isPopulateSegmentCache(Query<T> query, CacheStrategy<T,Object,Query<T>> cacheStrategy, CacheConfig cacheConfig, CacheUtil.ServerType serverType)	Returns whether the result-level cache should be populated for a particular query.
static <T> boolean	isUseResultCache(Query<T> query, CacheStrategy<T,Object,Query<T>> cacheStrategy, CacheConfig cacheConfig, CacheUtil.ServerType serverType)	Returns whether the result-level cache should be checked for a particular query.
static <T> boolean	isUseSegmentCache(Query<T> query, CacheStrategy<T,Object,Query<T>> cacheStrategy, CacheConfig cacheConfig, CacheUtil.ServerType serverType)	Returns whether the segment-level cache should be checked for a particular query.

Methods inherited from class java.lang.Object

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

Constructor Details

CacheUtil

public CacheUtil()

Method Details

computeResultLevelCacheKey

public static Cache.NamedKey computeResultLevelCacheKey(byte[] resultLevelCacheIdentifier)

computeSegmentCacheKey

public static Cache.NamedKey computeSegmentCacheKey(String segmentId,
 SegmentDescriptor descriptor,
 byte[] queryCacheKey)

isUseSegmentCache

public static <T> boolean isUseSegmentCache(Query<T> query,
 @Nullable
 CacheStrategy<T,Object,Query<T>> cacheStrategy,
 CacheConfig cacheConfig,
 CacheUtil.ServerType serverType)

Returns whether the segment-level cache should be checked for a particular query.

Parameters:

query - the query to check

cacheStrategy - result of QueryToolChest.getCacheStrategy(QueryType) on this query

cacheConfig - current active cache config

serverType - BROKER or DATA

isPopulateSegmentCache

public static <T> boolean isPopulateSegmentCache(Query<T> query,
 @Nullable
 CacheStrategy<T,Object,Query<T>> cacheStrategy,
 CacheConfig cacheConfig,
 CacheUtil.ServerType serverType)

Returns whether the result-level cache should be populated for a particular query.

Parameters:

query - the query to check

cacheStrategy - result of QueryToolChest.getCacheStrategy(QueryType) on this query

cacheConfig - current active cache config

serverType - BROKER or DATA

isUseResultCache

public static <T> boolean isUseResultCache(Query<T> query,
 @Nullable
 CacheStrategy<T,Object,Query<T>> cacheStrategy,
 CacheConfig cacheConfig,
 CacheUtil.ServerType serverType)

Returns whether the result-level cache should be checked for a particular query.

Parameters:

query - the query to check

cacheStrategy - result of QueryToolChest.getCacheStrategy(QueryType) on this query

cacheConfig - current active cache config

serverType - BROKER or DATA

isPopulateResultCache

public static <T> boolean isPopulateResultCache(Query<T> query,
 @Nullable
 CacheStrategy<T,Object,Query<T>> cacheStrategy,
 CacheConfig cacheConfig,
 CacheUtil.ServerType serverType)

Returns whether the result-level cache should be populated for a particular query.

Parameters:

query - the query to check

cacheStrategy - result of QueryToolChest.getCacheStrategy(QueryType) on this query

cacheConfig - current active cache config

serverType - BROKER or DATA