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 class	CacheUtil.ServerType

Constructor Summary

Constructors

Constructor	Description
CacheUtil()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheUtil

public CacheUtil()

Method Detail

computeResultLevelCacheKey

public static Cache.NamedKey computeResultLevelCacheKey(String resultLevelCacheIdentifier)

populateResultCache

public static void populateResultCache(Cache cache,
                                       Cache.NamedKey key,
                                       byte[] resultBytes)

computeSegmentCacheKey

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

isUseSegmentCache

public static <T> boolean isUseSegmentCache(org.apache.druid.query.Query<T> query,
                                            @Nullable
                                            org.apache.druid.query.CacheStrategy<T,Object,org.apache.druid.query.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(org.apache.druid.query.Query<T> query,
                                                 @Nullable
                                                 org.apache.druid.query.CacheStrategy<T,Object,org.apache.druid.query.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(org.apache.druid.query.Query<T> query,
                                           @Nullable
                                           org.apache.druid.query.CacheStrategy<T,Object,org.apache.druid.query.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(org.apache.druid.query.Query<T> query,
                                                @Nullable
                                                org.apache.druid.query.CacheStrategy<T,Object,org.apache.druid.query.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