FedXConfig (Eclipse RDF4J 3.1.0 API)

java.lang.Object
- org.eclipse.rdf4j.federated.FedXConfig

```
public class FedXConfig
extends Object
```
Configuration class for FedX

Author:

Andreas Schwarte

Field Summary

Fields
Modifier and Type Field and Description

static FedXConfig DEFAULT_CONFIG

Fields
Modifier and Type	Field and Description
`static FedXConfig`	`DEFAULT_CONFIG`

Constructor Summary

Constructors
Constructor and Description

FedXConfig()

Constructors
Constructor and Description
`FedXConfig()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`getBoundJoinBlockSize()` The block size for a bound join, i.e.
`boolean`	`getEnableServiceAsBoundJoin()` Returns a flag indicating whether vectored evaluation using the VALUES clause shall be applied for SERVICE expressions.
`int`	`getEnforceMaxQueryTime()` Get the maximum query time in seconds used for query evaluation.
`boolean`	`getIncludeInferredDefault()`
`int`	`getJoinWorkerThreads()` The (maximum) number of join worker threads used in the `ControlledWorkerScheduler` for join operations.
`int`	`getLeftJoinWorkerThreads()` The (maximum) number of left join worker threads used in the `ControlledWorkerScheduler` for join operations.
`String`	`getPrefixDeclarations()` Returns the path to a property file containing prefix declarations as "namespace=prefix" pairs (one per line).
`Class<? extends FederationEvalStrategy>`	`getSailEvaluationStrategy()` Returns the class of the `FederationEvalStrategy` implementation that is used in the case of SAIL implementations, e.g.
`String`	`getSourceSelectionCacheSpec()` Returns the configured `CacheBuilderSpec` (if any) for the `SourceSelectionMemoryCache`.
`Class<? extends FederationEvalStrategy>`	`getSPARQLEvaluationStrategy()` Returns the class of the `FederationEvalStrategy` implementation that is used in the case of SPARQL implementations, e.g.
`int`	`getUnionWorkerThreads()` The (maximum) number of union worker threads used in the `ControlledWorkerScheduler` for join operations.
`boolean`	`isDebugQueryPlan()` The debug mode for query plan.
`boolean`	`isEnableMonitoring()` Flag to enable/disable monitoring features.
`boolean`	`isLogQueries()` Flag to enable/disable query logging via `QueryLog`.
`boolean`	`isLogQueryPlan()` Flag to enable/disable query plan logging via `QueryPlanLog`.
`FedXConfig`	`withBoundJoinBlockSize(int boundJoinBlockSize)` Set the bound join block size.
`FedXConfig`	`withDebugQueryPlan(boolean flag)` Set whether the query plan shall be debugged.
`FedXConfig`	`withEnableMonitoring(boolean flag)` Enable monitoring.
`FedXConfig`	`withEnableServiceAsBoundJoin(boolean flag)` Whether external SERVICE clauses are evaluated using bound join (i.e.
`FedXConfig`	`withEnforceMaxQueryTime(int enforceMaxQueryTime)` Set enforce max query time.
`FedXConfig`	`withIncludeInferredDefault(boolean flag)` Set the default value supplied to `Operation.setIncludeInferred(boolean)`
`FedXConfig`	`withJoinWorkerThreads(int joinWorkerThreads)` Set the number of join worker threads.
`FedXConfig`	`withLeftJoinWorkerThreads(int leftJoinWorkerThreads)` Set the number of left join worker threads.
`FedXConfig`	`withLogQueries(boolean flag)` Set whether to log queries.
`FedXConfig`	`withLogQueryPlan(boolean flag)` Whether to log the query plan with `QueryPlanLog`.
`FedXConfig`	`withPrefixDeclarations(String prefixFile)` Set the optional prefix declarations file.
`FedXConfig`	`withSailEvaluationStrategy(Class<? extends FederationEvalStrategy> sailEvaluationStrategy)` Set the `FederationEvalStrategy` for SAIL federations.
`FedXConfig`	`withSourceSelectionCacheSpec(String cacheSpec)` The cache specification for the `SourceSelectionMemoryCache`.
`FedXConfig`	`withSparqlEvaluationStrategy(Class<? extends FederationEvalStrategy> sparqlEvaluationStrategy)` Set the `FederationEvalStrategy` for SPARQL federations.
`FedXConfig`	`withUnionWorkerThreads(int unionWorkerThreads)` Set the number of union worker threads.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_CONFIG
```
public static FedXConfig DEFAULT_CONFIG
```
- Constructor Detail
  - FedXConfig
```
public FedXConfig()
```
- Method Detail
  - withDebugQueryPlan
```
public FedXConfig withDebugQueryPlan(boolean flag)
```
    Set whether the query plan shall be debugged. See isDebugQueryPlan().
    Can be set after federation construction and initialize.
    
    Parameters:
    
    flag -
    
    Returns:
    
    the current config
  - withLogQueries
```
public FedXConfig withLogQueries(boolean flag)
```
    Set whether to log queries. See isLogQueries().
    Can only be set before federation initialization.
    
    Parameters:
    
    flag -
    
    Returns:
    
    the current config
  - withSparqlEvaluationStrategy
```
public FedXConfig withSparqlEvaluationStrategy(Class<? extends FederationEvalStrategy> sparqlEvaluationStrategy)
```
    Set the FederationEvalStrategy for SPARQL federations. See getSPARQLEvaluationStrategy().
    Can only be set before federation initialization.
    
    Parameters:
    
    sparqlEvaluationStrategy -
    
    Returns:
    
    the current config
  - withSailEvaluationStrategy
```
public FedXConfig withSailEvaluationStrategy(Class<? extends FederationEvalStrategy> sailEvaluationStrategy)
```
    Set the FederationEvalStrategy for SAIL federations. See getSailEvaluationStrategy().
    Can only be set before federation initialization.
    
    Parameters:
    
    sailEvaluationStrategy -
    
    Returns:
    
    the current config
  - withEnforceMaxQueryTime
```
public FedXConfig withEnforceMaxQueryTime(int enforceMaxQueryTime)
```
    Set enforce max query time. See getEnforceMaxQueryTime().
    Can be set after federation construction and initialize.
    
    Parameters:
    
    enforceMaxQueryTime - time in seconds, 0 to disable
    
    Returns:
    
    the current config
  - withIncludeInferredDefault
```
public FedXConfig withIncludeInferredDefault(boolean flag)
```
    Set the default value supplied to Operation.setIncludeInferred(boolean)
    
    Parameters:
    
    flag -
    
    Returns:
    
    the current config
  - withEnableMonitoring
```
public FedXConfig withEnableMonitoring(boolean flag)
```
    Enable monitoring. See isEnableMonitoring().
    Can only be set before federation initialization.
    
    Parameters:
    
    flag -
    
    Returns:
    
    the current config
  - withBoundJoinBlockSize
```
public FedXConfig withBoundJoinBlockSize(int boundJoinBlockSize)
```
    Set the bound join block size. See getBoundJoinBlockSize().
    Can only be set before federation initialization.
    
    Parameters:
    
    boundJoinBlockSize -
    
    Returns:
    
    the current config
  - withJoinWorkerThreads
```
public FedXConfig withJoinWorkerThreads(int joinWorkerThreads)
```
    Set the number of join worker threads. See getJoinWorkerThreads().
    Can only be set before federation initialization.
    
    Parameters:
    
    joinWorkerThreads -
    
    Returns:
    
    the current config
  - withLeftJoinWorkerThreads
```
public FedXConfig withLeftJoinWorkerThreads(int leftJoinWorkerThreads)
```
    Set the number of left join worker threads. See getLeftJoinWorkerThreads().
    Can only be set before federation initialization.
    
    Parameters:
    
    leftJoinWorkerThreads -
    
    Returns:
    
    the current config
  - withUnionWorkerThreads
```
public FedXConfig withUnionWorkerThreads(int unionWorkerThreads)
```
    Set the number of union worker threads. See getUnionWorkerThreads().
    Can only be set before federation initialization.
    
    Parameters:
    
    unionWorkerThreads -
    
    Returns:
    
    the current config
  - withPrefixDeclarations
```
public FedXConfig withPrefixDeclarations(String prefixFile)
```
    Set the optional prefix declarations file. See getPrefixDeclarations().
    Can only be set before federation initialization.
    
    Parameters:
    
    prefixFile -
    
    Returns:
    
    config
  - withLogQueryPlan
```
public FedXConfig withLogQueryPlan(boolean flag)
```
    Whether to log the query plan with QueryPlanLog. See isLogQueryPlan().
    Can only be set before federation initialization.
    
    Parameters:
    
    flag -
    
    Returns:
    
    the current config
  - withEnableServiceAsBoundJoin
```
public FedXConfig withEnableServiceAsBoundJoin(boolean flag)
```
    Whether external SERVICE clauses are evaluated using bound join (i.e. with the VALUES clause). Default true
    
    Parameters:
    
    flag -
    
    Returns:
    
    the current config.
  - withSourceSelectionCacheSpec
```
public FedXConfig withSourceSelectionCacheSpec(String cacheSpec)
```
    The cache specification for the SourceSelectionMemoryCache. If not set explicitly, the SourceSelectionMemoryCache.DEFAULT_CACHE_SPEC is used.
    
    Parameters:
    
    cacheSpec - the CacheBuilderSpec for the SourceSelectionCache
    
    Returns:
    
    the current config
    
    See Also:
    
    SourceSelectionMemoryCache
  - getJoinWorkerThreads
```
public int getJoinWorkerThreads()
```
    The (maximum) number of join worker threads used in the ControlledWorkerScheduler for join operations. Default is 20.
    
    Returns:
    
    the number of join worker threads
  - getUnionWorkerThreads
```
public int getUnionWorkerThreads()
```
    The (maximum) number of union worker threads used in the ControlledWorkerScheduler for join operations. Default is 20
    
    Returns:
    
    number of union worker threads
  - getLeftJoinWorkerThreads
```
public int getLeftJoinWorkerThreads()
```
    The (maximum) number of left join worker threads used in the ControlledWorkerScheduler for join operations. Default is 10.
    
    Returns:
    
    the number of left join worker threads
  - getBoundJoinBlockSize
```
public int getBoundJoinBlockSize()
```
    The block size for a bound join, i.e. the number of bindings that are integrated in a single subquery. Default is 15.
    
    Returns:
    
    the bound join block size
  - getEnableServiceAsBoundJoin
```
public boolean getEnableServiceAsBoundJoin()
```
    Returns a flag indicating whether vectored evaluation using the VALUES clause shall be applied for SERVICE expressions. Default: false Note: for todays endpoints it is more efficient to disable vectored evaluation of SERVICE.
    
    Returns:
    
    whether SERVICE expressions are evaluated using bound joins
  - getEnforceMaxQueryTime
```
public int getEnforceMaxQueryTime()
```
    Get the maximum query time in seconds used for query evaluation. Applied if QueryManager is used to create queries.
    
    Set to 0 to disable query timeouts.
    The timeout is also applied for individual fine-granular join or union operations as a max time.
    
    Returns:
    
    the maximum query time in seconds
  - getIncludeInferredDefault
```
public boolean getIncludeInferredDefault()
```
    Returns:
    
    the default for Operation.getIncludeInferred()
  - isEnableMonitoring
```
public boolean isEnableMonitoring()
```
    Flag to enable/disable monitoring features. Default=false.
    
    Returns:
    
    whether monitoring is enabled
  - isLogQueryPlan
```
public boolean isLogQueryPlan()
```
    Flag to enable/disable query plan logging via QueryPlanLog. Default=false The QueryPlanLog facility allows to retrieve the query execution plan from a variable local to the executing thread.
    
    Returns:
    
    whether the query plan shall be logged
  - isLogQueries
```
public boolean isLogQueries()
```
    Flag to enable/disable query logging via QueryLog. Default=false The QueryLog facility allows to log all queries to a file. See QueryLog for details. Requires isEnableMonitoring() to be active.
    
    Returns:
    
    whether queries are logged
  - getPrefixDeclarations
```
public String getPrefixDeclarations()
```
    Returns the path to a property file containing prefix declarations as "namespace=prefix" pairs (one per line).
    Default: no prefixes are replaced. Note that prefixes are only replaced when using the QueryManager to create/evaluate queries. Example: foaf=http://xmlns.com/foaf/0.1/ rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# =http://mydefaultns.org/
    
    Returns:
    
    the location of the prefix declarations or null if not configured
  - getSourceSelectionCacheSpec
```
public String getSourceSelectionCacheSpec()
```
    Returns the configured CacheBuilderSpec (if any) for the SourceSelectionMemoryCache. If not defined, the SourceSelectionMemoryCache.DEFAULT_CACHE_SPEC is used.
    
    Returns:
    
    the CacheBuilderSpec or null
  - getSailEvaluationStrategy
```
public Class<? extends FederationEvalStrategy> getSailEvaluationStrategy()
```
    Returns the class of the FederationEvalStrategy implementation that is used in the case of SAIL implementations, e.g. for native stores.
    Default SailFederationEvalStrategy
    
    Returns:
    
    the evaluation strategy class
  - getSPARQLEvaluationStrategy
```
public Class<? extends FederationEvalStrategy> getSPARQLEvaluationStrategy()
```
    Returns the class of the FederationEvalStrategy implementation that is used in the case of SPARQL implementations, e.g. SPARQL repository or remote repository.
    Default SparqlFederationEvalStrategy
    
    Returns:
    
    the evaluation strategy class
  - isDebugQueryPlan
```
public boolean isDebugQueryPlan()
```
    The debug mode for query plan. If enabled, the query execution plan is printed to stdout
    
    Returns:
    
    whether the query plan is printed to std out

Class FedXConfig

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_CONFIG

Constructor Detail

FedXConfig

Method Detail

withDebugQueryPlan

withLogQueries

withSparqlEvaluationStrategy

withSailEvaluationStrategy

withEnforceMaxQueryTime

withIncludeInferredDefault

withEnableMonitoring

withBoundJoinBlockSize

withJoinWorkerThreads

withLeftJoinWorkerThreads

withUnionWorkerThreads

withPrefixDeclarations

withLogQueryPlan

withEnableServiceAsBoundJoin

withSourceSelectionCacheSpec

getJoinWorkerThreads

getUnionWorkerThreads

getLeftJoinWorkerThreads

getBoundJoinBlockSize

getEnableServiceAsBoundJoin

getEnforceMaxQueryTime

getIncludeInferredDefault

isEnableMonitoring

isLogQueryPlan

isLogQueries

getPrefixDeclarations

getSourceSelectionCacheSpec

getSailEvaluationStrategy

getSPARQLEvaluationStrategy

isDebugQueryPlan