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## org.neo4j.kernel.configuration
Class Config

    java.lang.Object
      org.neo4j.kernel.configuration.Config

All Implemented Interfaces:
  DiagnosticsProvider

    public class Config

extends Object
implements DiagnosticsProvider

This class holds the overall configuration of a Neo4j database instance. Use the accessors to convert the internal key-value settings to other types. Users can assume that old settings have been migrated to their new counterparts, and that defaults have been applied. UI's can change configuration by calling applyChanges. Any listener, such as services that use this configuration, can be notified of changes by implementing the `ConfigurationChangeListener` interface.

Field Summary
`static String` | `ALLOW_STORE_UPGRADE` Deprecated.
`static String` | `ARRAY_BLOCK_SIZE` Deprecated.
`static String` | `ARRAY_PROPERTY_STORE_MMAP_SIZE` Deprecated.
`static String` | `BACKUP_SLAVE` Deprecated.
`static String` | `CACHE_TYPE` Deprecated.
`static String` | `DEFAULT_DATA_SOURCE_NAME` Deprecated.
`static String` | `DUMP_CONFIGURATION` Deprecated.
`static String` | `ENABLE_ONLINE_BACKUP` Deprecated.
`static String` | `ENABLE_REMOTE_SHELL` Deprecated.
`static String` | `GC_MONITOR_THRESHOLD` Deprecated.
`static String` | `GC_MONITOR_WAIT_TIME` Deprecated.
`static String` | `GCR_CACHE_MIN_LOG_INTERVAL` Deprecated.
`static String` | `INTERCEPT_COMMITTING_TRANSACTIONS` Deprecated.
`static String` | `INTERCEPT_DESERIALIZED_TRANSACTIONS` Deprecated.
`static String` | `KEEP_LOGICAL_LOGS` Deprecated.
`static String` | `LOGICAL_LOG` Deprecated.
`static String` | `LUCENE_SEARCHER_CACHE_SIZE` Deprecated.
`static String` | `LUCENE_WRITER_CACHE_SIZE` Deprecated.
`static String` | `NEO_STORE` Deprecated.
`static String` | `NODE_AUTO_INDEXING` Deprecated.
`static String` | `NODE_CACHE_ARRAY_FRACTION` Deprecated.
`static String` | `NODE_CACHE_SIZE` Deprecated.
`static String` | `NODE_KEYS_INDEXABLE` Deprecated.
`static String` | `NODE_STORE_MMAP_SIZE` Deprecated.
`static String` | `PROPERTY_INDEX_KEY_STORE_MMAP_SIZE` Deprecated.
`static String` | `PROPERTY_INDEX_STORE_MMAP_SIZE` Deprecated.
`static String` | `PROPERTY_STORE_MMAP_SIZE` Deprecated.
`static String` | `READ_ONLY` Deprecated.
`static String` | `REBUILD_IDGENERATORS_FAST` Deprecated.
`static String` | `RELATIONSHIP_AUTO_INDEXING` Deprecated.
`static String` | `RELATIONSHIP_CACHE_ARRAY_FRACTION` Deprecated.
`static String` | `RELATIONSHIP_CACHE_SIZE` Deprecated.
`static String` | `RELATIONSHIP_KEYS_INDEXABLE` Deprecated.
`static String` | `RELATIONSHIP_STORE_MMAP_SIZE` Deprecated.
`static String` | `STORAGE_DIRECTORY` Deprecated.
`static String` | `STRING_BLOCK_SIZE` Deprecated.
`static String` | `STRING_PROPERTY_STORE_MMAP_SIZE` Deprecated.
`static String` | `TXMANAGER_IMPLEMENTATION` Deprecated.
`static String` | `USE_MEMORY_MAPPED_BUFFERS` Deprecated.

Constructor Summary
`Config()`
`Config(Map<String,String> inputParams)`
`Config(Map<String,String> inputParams, Class<?>... settingsClasses)`
`Config(Map<String,String> inputParams, Iterable<Class<?>> settingsClasses)`

Method Summary
`void` | `acceptDiagnosticsVisitor(Object visitor)` Accept a visitor that may or may not be capable of visiting this object.
`void` | `addConfigurationChangeListener(ConfigurationChangeListener listener)`
`void` | `applyChanges(Map<String,String> newConfiguration)` Replace the current set of configuration parameters with another one.
`void` | `dump(DiagnosticsPhase phase, org.neo4j.kernel.impl.util.StringLogger log)` Dump the diagnostic information of this `DiagnosticsProvider` for the specified `phase` to the provided `log`.
`

`<T> T`

`
`get(GraphDatabaseSetting<T> setting)`
Retrieve a configuration property.
`boolean` | `getBoolean(GraphDatabaseSetting.BooleanSetting setting)` Deprecated.
`String` | `getDiagnosticsIdentifier()` Return an identifier for this `DiagnosticsProvider`.
`double` | `getDouble(GraphDatabaseSetting.DoubleSetting setting)` Deprecated.
`long` | `getDuration(GraphDatabaseSetting.StringSetting setting)` Deprecated.
`

`<T extends Enum<T>> T`

`
`getEnum(Class<T> enumType, GraphDatabaseSetting.OptionsSetting graphDatabaseSetting)`
Deprecated.
`float` | `getFloat(GraphDatabaseSetting.FloatSetting setting)` Deprecated.
`int` | `getInteger(GraphDatabaseSetting.IntegerSetting setting)` Deprecated.
`Collection<String>` | `getKeys()`
`long` | `getLong(GraphDatabaseSetting.LongSetting setting)` Deprecated.
`Map<String,String>` | `getParams()`
`long` | `getSize(GraphDatabaseSetting.StringSetting setting)` Deprecated.
`boolean` | `isSet(Setting<?> graphDatabaseSetting)`
`static long` | `parseLongWithUnit(String numberWithPotentialUnit)`
`void` | `removeConfigurationChangeListener(ConfigurationChangeListener listener)`
`void` | `setLogger(org.neo4j.kernel.impl.util.StringLogger log)`
`String` | `toString()`

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

Field Detail

### DEFAULT_DATA_SOURCE_NAME

    @Deprecated
    public static final String DEFAULT_DATA_SOURCE_NAME

  Deprecated.
  See Also:
    Constant Field Values

### USE_MEMORY_MAPPED_BUFFERS

    @Deprecated
    public static final String USE_MEMORY_MAPPED_BUFFERS

  Deprecated.
  Tell Neo4j to use memory mapped buffers for accessing the native storage layer

  See Also:
    Constant Field Values

### DUMP_CONFIGURATION

    @Deprecated
    public static final String DUMP_CONFIGURATION

  Deprecated.
  Print out the effective Neo4j configuration after startup

  See Also:
    Constant Field Values

### KEEP_LOGICAL_LOGS

    @Deprecated
    public static final String KEEP_LOGICAL_LOGS

  Deprecated.
  Make Neo4j keep the logical transaction logs for being able to backup the database. Provides control over how much disk space logical logs are allowed to take per data source.

  See Also:
    Constant Field Values

### ENABLE_REMOTE_SHELL

    @Deprecated
    public static final String ENABLE_REMOTE_SHELL

  Deprecated.
  Enable a remote shell server which shell clients can log in to

  See Also:
    Constant Field Values

### ENABLE_ONLINE_BACKUP

    @Deprecated
    public static final String ENABLE_ONLINE_BACKUP

  Deprecated.
  Enable a support for running online backups

  See Also:
    Constant Field Values

### BACKUP_SLAVE

    @Deprecated
    public static final String BACKUP_SLAVE

  Deprecated.
  Mark this database as a backup slave.

  See Also:
    Constant Field Values

### READ_ONLY

    @Deprecated
    public static final String READ_ONLY

  Deprecated.
  Only allow read operations from this Neo4j instance.

  See Also:
    Constant Field Values

### STORAGE_DIRECTORY

    @Deprecated
    public static final String STORAGE_DIRECTORY

  Deprecated.
  Relative path for where the Neo4j storage directory is located

  See Also:
    Constant Field Values

### REBUILD_IDGENERATORS_FAST

    @Deprecated
    public static final String REBUILD_IDGENERATORS_FAST

  Deprecated.
  Use a quick approach for rebuilding the ID generators. This give quicker recovery time, but will limit the ability to reuse the space of deleted entities.

  See Also:
    Constant Field Values

### NODE_STORE_MMAP_SIZE

    @Deprecated
    public static final String NODE_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the node store

  See Also:
    Constant Field Values

### ARRAY_PROPERTY_STORE_MMAP_SIZE

    @Deprecated
    public static final String ARRAY_PROPERTY_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the array property store

  See Also:
    Constant Field Values

### PROPERTY_INDEX_KEY_STORE_MMAP_SIZE

    @Deprecated
    public static final String PROPERTY_INDEX_KEY_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the store for property key strings

  See Also:
    Constant Field Values

### PROPERTY_INDEX_STORE_MMAP_SIZE

    @Deprecated
    public static final String PROPERTY_INDEX_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the store for property key indexes

  See Also:
    Constant Field Values

### PROPERTY_STORE_MMAP_SIZE

    @Deprecated
    public static final String PROPERTY_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the property value store

  See Also:
    Constant Field Values

### STRING_PROPERTY_STORE_MMAP_SIZE

    @Deprecated
    public static final String STRING_PROPERTY_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the string property store

  See Also:
    Constant Field Values

### RELATIONSHIP_STORE_MMAP_SIZE

    @Deprecated
    public static final String RELATIONSHIP_STORE_MMAP_SIZE

  Deprecated.
  The size to allocate for memory mapping the relationship store

  See Also:
    Constant Field Values

### LOGICAL_LOG

    @Deprecated
    public static final String LOGICAL_LOG

  Deprecated.
  Relative path for where the Neo4j logical log is located

  See Also:
    Constant Field Values

### NEO_STORE

    @Deprecated
    public static final String NEO_STORE

  Deprecated.
  Relative path for where the Neo4j storage information file is located

  See Also:
    Constant Field Values

### CACHE_TYPE

    @Deprecated
    public static final String CACHE_TYPE

  Deprecated.
  The type of cache to use for nodes and relationships, one of [weak, soft, none, array]

  See Also:
    Constant Field Values

### NODE_CACHE_SIZE

    @Deprecated
    public static final String NODE_CACHE_SIZE

  Deprecated.
  The amount of memory to use for the node cache (when using the 'gcr' cache).

  See Also:
    Constant Field Values

### RELATIONSHIP_CACHE_SIZE

    @Deprecated
    public static final String RELATIONSHIP_CACHE_SIZE

  Deprecated.
  The amount of memory to use for the relationship cache (when using the 'gcr' cache).

  See Also:
    Constant Field Values

### NODE_CACHE_ARRAY_FRACTION

    @Deprecated
    public static final String NODE_CACHE_ARRAY_FRACTION

  Deprecated.
  The fraction of the heap (1%-10%) to use for the base array in the node cache (when using the 'gcr' cache).

  See Also:
    Constant Field Values

### RELATIONSHIP_CACHE_ARRAY_FRACTION

    @Deprecated
    public static final String RELATIONSHIP_CACHE_ARRAY_FRACTION

  Deprecated.
  The fraction of the heap (1%-10%) to use for the base array in the relationship cache (when using the 'gcr' cache).

  See Also:
    Constant Field Values

### GCR_CACHE_MIN_LOG_INTERVAL

    @Deprecated
    public static final String GCR_CACHE_MIN_LOG_INTERVAL

  Deprecated.
  The minimal time that must pass in between logging statistics from the cache (when using the 'gcr' cache). Default unit is seconds, suffix with 's', 'm', or 'ms' to have the unit be seconds, minutes or milliseconds respectively.

  See Also:
    Constant Field Values

### TXMANAGER_IMPLEMENTATION

    @Deprecated
    public static final String TXMANAGER_IMPLEMENTATION

  Deprecated.
  The name of the Transaction Manager service to use as defined in the TM service provider constructor, defaults to native.

  See Also:
    Constant Field Values

### INTERCEPT_COMMITTING_TRANSACTIONS

    @Deprecated
    public static final String INTERCEPT_COMMITTING_TRANSACTIONS

  Deprecated.
  Determines whether any TransactionInterceptors loaded will intercept prepared transactions before they reach the logical log. Defaults to false.

  See Also:
    Constant Field Values

### INTERCEPT_DESERIALIZED_TRANSACTIONS

    @Deprecated
    public static final String INTERCEPT_DESERIALIZED_TRANSACTIONS

  Deprecated.
  Determines whether any TransactionInterceptors loaded will intercept externally received transactions (e.g. in HA) before they reach the logical log and are applied to the store. Defaults to false.

  See Also:
    Constant Field Values

### ALLOW_STORE_UPGRADE

    @Deprecated
    public static final String ALLOW_STORE_UPGRADE

  Deprecated.
  Boolean (one of true,false) defining whether to allow a store upgrade in case the current version of the database starts against an older store version. Setting this to true does not guarantee successful upgrade, just allows an attempt at it.

  See Also:
    Constant Field Values

### STRING_BLOCK_SIZE

    @Deprecated
    public static final String STRING_BLOCK_SIZE

  Deprecated.
  See Also:
    Constant Field Values

### ARRAY_BLOCK_SIZE

    @Deprecated
    public static final String ARRAY_BLOCK_SIZE

  Deprecated.
  See Also:
    Constant Field Values

### NODE_KEYS_INDEXABLE

    @Deprecated
    public static final String NODE_KEYS_INDEXABLE

  Deprecated.
  A list of property names (comma separated) that will be indexed by default. This applies to Nodes only.

  See Also:
    Constant Field Values

### RELATIONSHIP_KEYS_INDEXABLE

    @Deprecated
    public static final String RELATIONSHIP_KEYS_INDEXABLE

  Deprecated.
  A list of property names (comma separated) that will be indexed by default. This applies to Relationships only.

  See Also:
    Constant Field Values

### NODE_AUTO_INDEXING

    @Deprecated
    public static final String NODE_AUTO_INDEXING

  Deprecated.
  Boolean value (one of true, false) that controls the auto indexing feature for nodes. Setting to false shuts it down unconditionally, while true enables it for every property, subject to restrictions in the configuration. The default is false.

  See Also:
    Constant Field Values

### RELATIONSHIP_AUTO_INDEXING

    @Deprecated
    public static final String RELATIONSHIP_AUTO_INDEXING

  Deprecated.
  Boolean value (one of true, false) that controls the auto indexing feature for relationships. Setting to false shuts it down unconditionally, while true enables it for every property, subject to restrictions in the configuration. The default is false.

  See Also:
    Constant Field Values

### LUCENE_SEARCHER_CACHE_SIZE

    @Deprecated
    public static final String LUCENE_SEARCHER_CACHE_SIZE

  Deprecated.
  Integer value that sets the maximum number of open lucene index searchers. The default is Integer.MAX_VALUE

  See Also:
    Constant Field Values

### LUCENE_WRITER_CACHE_SIZE

    @Deprecated
    public static final String LUCENE_WRITER_CACHE_SIZE

  Deprecated.
  Integer value that sets the maximum number of open lucene index writers. The default is Integer.MAX_VALUE

  See Also:
    Constant Field Values

### GC_MONITOR_WAIT_TIME

    @Deprecated
    public static final String GC_MONITOR_WAIT_TIME

  Deprecated.
  Amount of time in ms the GC monitor thread will wait before taking another measurement. Default is 100 ms.

  See Also:
    Constant Field Values

### GC_MONITOR_THRESHOLD

    @Deprecated
    public static final String GC_MONITOR_THRESHOLD

  Deprecated.
  The amount of time in ms the monitor thread has to be blocked before logging a message it was blocked. Default is 200ms

  See Also:
    Constant Field Values

Constructor Detail

### Config

    public Config()

### Config

    public Config(Map<String,String> inputParams)

### Config

    public Config(Map<String,String> inputParams,
                  Class<?>... settingsClasses)

### Config

    public Config(Map<String,String> inputParams,
                  Iterable<Class<?>> settingsClasses)

Method Detail

### getParams

    public Map<String,String> getParams()

### getKeys

    public Collection<String> getKeys()

### isSet

    public boolean isSet(Setting<?> graphDatabaseSetting)

### get

    public <T> T get(GraphDatabaseSetting<T> setting)

  Retrieve a configuration property.

  Parameters:
    `setting` -
  Returns:

### applyChanges

    public void applyChanges(Map<String,String> newConfiguration)

  Replace the current set of configuration parameters with another one.

  Parameters:
    `newConfiguration` -

### setLogger

    public void setLogger(org.neo4j.kernel.impl.util.StringLogger log)

### addConfigurationChangeListener

    public void addConfigurationChangeListener(ConfigurationChangeListener listener)

### removeConfigurationChangeListener

    public void removeConfigurationChangeListener(ConfigurationChangeListener listener)

### getDiagnosticsIdentifier

    public String getDiagnosticsIdentifier()

  Description copied from interface: `DiagnosticsProvider`
  Return an identifier for this `DiagnosticsProvider`. The result of this method must be stable, i.e. invoking this method multiple times on the same object should return `equal` `strings`. For `DiagnosticsProvider`s where there is only one instance of that `DiagnosticsProvider`, an implementation like this is would be a sane default, given that the implementing class has a sensible name: `

       public String getDiagnosticsIdentifier()
       {
           return getClass().getName();
       }

  `

  Specified by:
    `getDiagnosticsIdentifier` in interface `DiagnosticsProvider`
  Returns:
    the identifier of this diagnostics provider.

### acceptDiagnosticsVisitor

    public void acceptDiagnosticsVisitor(Object visitor)

  Description copied from interface: `DiagnosticsProvider`
  Accept a visitor that may or may not be capable of visiting this object. Typical example: `

       class OperationalStatistics implements DiagnosticsProvider
       {
           public void acceptDiagnosticsVisitor( Object visitor )
           {
               if ( visitor instanceof OperationalStatisticsVisitor )
               {
                    ((OperationalStatisticsVisitor)visitor).visitOperationalStatistics( this );
               }
           }
       }

       interface OperationalStatisticsVisitor
       {
           void visitOperationalStatistics( OperationalStatistics statistics );
       }

  `

  Specified by:
    `acceptDiagnosticsVisitor` in interface `DiagnosticsProvider`
  Parameters:
    `visitor` - the visitor visiting this `DiagnosticsProvider`.

### dump

    public void dump(DiagnosticsPhase phase,
                     org.neo4j.kernel.impl.util.StringLogger log)

  Description copied from interface: `DiagnosticsProvider`
  Dump the diagnostic information of this `DiagnosticsProvider` for the specified `phase` to the provided `log`.

  Specified by:
    `dump` in interface `DiagnosticsProvider`
  Parameters:
    `phase` - the `phase` to dump information for.
    `log` - the `log` to dump information to.

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### getBoolean

    @Deprecated
    public boolean getBoolean(GraphDatabaseSetting.BooleanSetting setting)

  Deprecated.

### getInteger

    @Deprecated
    public int getInteger(GraphDatabaseSetting.IntegerSetting setting)

  Deprecated.

### getLong

    @Deprecated
    public long getLong(GraphDatabaseSetting.LongSetting setting)

  Deprecated.

### getDouble

    @Deprecated
    public double getDouble(GraphDatabaseSetting.DoubleSetting setting)

  Deprecated.

### getFloat

    @Deprecated
    public float getFloat(GraphDatabaseSetting.FloatSetting setting)

  Deprecated.

### getSize

    @Deprecated
    public long getSize(GraphDatabaseSetting.StringSetting setting)

  Deprecated.

### parseLongWithUnit

    public static long parseLongWithUnit(String numberWithPotentialUnit)

### getDuration

    @Deprecated
    public long getDuration(GraphDatabaseSetting.StringSetting setting)

  Deprecated.

### getEnum

    @Deprecated
    public <T extends Enum<T>> T getEnum(Class<T> enumType,
                                                    GraphDatabaseSetting.OptionsSetting graphDatabaseSetting)

  Deprecated.

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