org.elasticsearch.cluster.metadata

Class IndexNameExpressionResolver

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.cluster.metadata.IndexNameExpressionResolver

public class IndexNameExpressionResolver
extends AbstractComponent

Field Summary

Fields inherited from class org.elasticsearch.common.component.AbstractComponent

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor and Description
IndexNameExpressionResolver(Settings settings)

Method Summary

Methods

Modifier and Type	Method and Description
String[]	concreteIndices(ClusterState state, IndicesOptions options, long startTime, String... indexExpressions) Translates the provided index expression into actual concrete indices, properly deduplicated.
String[]	concreteIndices(ClusterState state, IndicesOptions options, String... indexExpressions) Translates the provided index expression into actual concrete indices, properly deduplicated.
String[]	concreteIndices(ClusterState state, IndicesRequest request) Same as concreteIndices(ClusterState, IndicesOptions, String...), but the index expressions and options are encapsulated in the specified request.
String	concreteSingleIndex(ClusterState state, IndicesRequest request) Utility method that allows to resolve an index expression to its corresponding single concrete index.
String[]	filteringAliases(ClusterState state, String index, String... expressions) Iterates through the list of indices and selects the effective list of filtering aliases for the given index.
boolean	hasIndexOrAlias(String aliasOrIndex, ClusterState state)
static boolean	isAllIndices(List<String> aliasesOrIndices) Identifies whether the array containing index names given as argument refers to all indices The empty or null array identifies all indices
String	resolveDateMathExpression(String dateExpression)
Map<String,Set<String>>	resolveSearchRouting(ClusterState state, String routing, String... expressions) Resolves the search routing if in the expression aliases are used.

Methods inherited from class org.elasticsearch.common.component.AbstractComponent

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexNameExpressionResolver

@Inject
public IndexNameExpressionResolver(Settings settings)

Method Detail

concreteIndices

public String[] concreteIndices(ClusterState state,
                       IndicesRequest request)

Same as concreteIndices(ClusterState, IndicesOptions, String...), but the index expressions and options are encapsulated in the specified request.

concreteIndices

public String[] concreteIndices(ClusterState state,
                       IndicesOptions options,
                       String... indexExpressions)

Translates the provided index expression into actual concrete indices, properly deduplicated.

Parameters:

state - the cluster state containing all the data to resolve to expressions to concrete indices

options - defines how the aliases or indices need to be resolved to concrete indices

indexExpressions - expressions that can be resolved to alias or index names.

Returns:

the resolved concrete indices based on the cluster state, indices options and index expressions

Throws:

IndexNotFoundException - if one of the index expressions is pointing to a missing index or alias and the provided indices options in the context don't allow such a case, or if the final result of the indices resolution contains no indices and the indices options in the context don't allow such a case.

IllegalArgumentException - if one of the aliases resolve to multiple indices and the provided indices options in the context don't allow such a case.

concreteIndices

public String[] concreteIndices(ClusterState state,
                       IndicesOptions options,
                       long startTime,
                       String... indexExpressions)

Translates the provided index expression into actual concrete indices, properly deduplicated.

Parameters:

state - the cluster state containing all the data to resolve to expressions to concrete indices

options - defines how the aliases or indices need to be resolved to concrete indices

startTime - The start of the request where concrete indices is being invoked for

indexExpressions - expressions that can be resolved to alias or index names.

Returns:

the resolved concrete indices based on the cluster state, indices options and index expressions provided indices options in the context don't allow such a case, or if the final result of the indices resolution contains no indices and the indices options in the context don't allow such a case.

Throws:

IllegalArgumentException - if one of the aliases resolve to multiple indices and the provided indices options in the context don't allow such a case.

concreteSingleIndex

public String concreteSingleIndex(ClusterState state,
                         IndicesRequest request)

Utility method that allows to resolve an index expression to its corresponding single concrete index. Callers should make sure they provide proper IndicesOptions that require a single index as a result. The indices resolution must in fact return a single index when using this method, an IllegalArgumentException gets thrown otherwise.

Parameters:

state - the cluster state containing all the data to resolve to expression to a concrete index

request - The request that defines how the an alias or an index need to be resolved to a concrete index and the expression that can be resolved to an alias or an index name.

Returns:

the concrete index obtained as a result of the index resolution

Throws:

IllegalArgumentException - if the index resolution lead to more than one index

hasIndexOrAlias

public boolean hasIndexOrAlias(String aliasOrIndex,
                      ClusterState state)

Returns:

whether the specified alias or index exists. If the alias or index contains datemath then that is resolved too.

resolveDateMathExpression

public String resolveDateMathExpression(String dateExpression)

Returns:

If the specified string is data math expression then this method returns the resolved expression.

filteringAliases

public String[] filteringAliases(ClusterState state,
                        String index,
                        String... expressions)

Iterates through the list of indices and selects the effective list of filtering aliases for the given index.

Only aliases with filters are returned. If the indices list contains a non-filtering reference to the index itself - null is returned. Returns null if no filtering is required.

resolveSearchRouting

public Map<String,Set<String>> resolveSearchRouting(ClusterState state,
                                           @Nullable
                                           String routing,
                                           String... expressions)

Resolves the search routing if in the expression aliases are used. If expressions point to concrete indices or aliases with no routing defined the specified routing is used.

Returns:

routing values grouped by concrete index

isAllIndices

public static boolean isAllIndices(List<String> aliasesOrIndices)

Identifies whether the array containing index names given as argument refers to all indices The empty or null array identifies all indices

Parameters:

aliasesOrIndices - the array containing index names

Returns:

true if the provided array maps to all indices, false otherwise