AbstractReplicationStrategy (apache-cassandra API)
Date: 2014-10-21

org.apache.cassandra.locator

## Class AbstractReplicationStrategy

- java.lang.Object
- - org.apache.cassandra.locator.AbstractReplicationStrategy

- Direct Known Subclasses:
    LocalStrategy, NetworkTopologyStrategy, OldNetworkTopologyStrategy, SimpleStrategy

      public abstract class AbstractReplicationStrategy
      extends java.lang.Object

  A abstract parent for all replication strategies.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `java.util.Map<java.lang.String,java.lang.String>` | `configOptions`
    `IEndpointSnitch` | `snitch`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract java.util.List<java.net.InetAddress>` | `calculateNaturalEndpoints(Token searchToken, TokenMetadata tokenMetadata)` calculate the natural endpoints for the given token
    `static AbstractReplicationStrategy` | `createReplicationStrategy(java.lang.String keyspaceName, java.lang.Class<? extends AbstractReplicationStrategy> strategyClass, TokenMetadata tokenMetadata, IEndpointSnitch snitch, java.util.Map<java.lang.String,java.lang.String> strategyOptions)`
    `com.google.common.collect.Multimap<java.net.InetAddress,Range<Token>>` | `getAddressRanges()`
    `com.google.common.collect.Multimap<java.net.InetAddress,Range<Token>>` | `getAddressRanges(TokenMetadata metadata)`
    `java.util.ArrayList<java.net.InetAddress>` | `getCachedEndpoints(Token t)`
    `static java.lang.Class<AbstractReplicationStrategy>` | `getClass(java.lang.String cls)`
    `java.util.ArrayList<java.net.InetAddress>` | `getNaturalEndpoints(RingPosition searchPosition)` get the (possibly cached) endpoints that should store the given Token.
    `java.util.Collection<Range<Token>>` | `getPendingAddressRanges(TokenMetadata metadata, java.util.Collection<Token> pendingTokens, java.net.InetAddress pendingAddress)`
    `java.util.Collection<Range<Token>>` | `getPendingAddressRanges(TokenMetadata metadata, Token pendingToken, java.net.InetAddress pendingAddress)`
    `com.google.common.collect.Multimap<Range<Token>,java.net.InetAddress>` | `getRangeAddresses(TokenMetadata metadata)`
    `abstract int` | `getReplicationFactor()` calculate the RF based on strategy_options.
    `AbstractWriteResponseHandler` | `getWriteResponseHandler(java.util.Collection<java.net.InetAddress> naturalEndpoints, java.util.Collection<java.net.InetAddress> pendingEndpoints, ConsistencyLevel consistency_level, java.lang.Runnable callback, WriteType writeType)`
    `java.util.Collection<java.lang.String>` | `recognizedOptions()`
    `abstract void` | `validateOptions()`
    `protected void` | `validateReplicationFactor(java.lang.String rf)`
    `static void` | `validateReplicationStrategy(java.lang.String keyspaceName, java.lang.Class<? extends AbstractReplicationStrategy> strategyClass, TokenMetadata tokenMetadata, IEndpointSnitch snitch, java.util.Map<java.lang.String,java.lang.String> strategyOptions)`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### configOptions

          public final java.util.Map<java.lang.String,java.lang.String> configOptions

    - #### snitch

          public IEndpointSnitch snitch

  - ### Method Detail

    - #### getCachedEndpoints

          public java.util.ArrayList<java.net.InetAddress> getCachedEndpoints(Token t)

    - #### getNaturalEndpoints

          public java.util.ArrayList<java.net.InetAddress> getNaturalEndpoints(RingPosition searchPosition)

      get the (possibly cached) endpoints that should store the given Token. Note that while the endpoints are conceptually a Set (no duplicates will be included), we return a List to avoid an extra allocation when sorting by proximity later
      Parameters:
        `searchPosition` - the position the natural endpoints are requested for
      Returns:
        a copy of the natural endpoints for the given token

    - #### calculateNaturalEndpoints

          public abstract java.util.List<java.net.InetAddress> calculateNaturalEndpoints(Token searchToken,
                                                                       TokenMetadata tokenMetadata)

      calculate the natural endpoints for the given token
      Parameters:
        `searchToken` - the token the natural endpoints are requested for
      Returns:
        a copy of the natural endpoints for the given token
      See Also:
        `getNaturalEndpoints(org.apache.cassandra.dht.RingPosition)`

    - #### getWriteResponseHandler

          public AbstractWriteResponseHandler getWriteResponseHandler(java.util.Collection<java.net.InetAddress> naturalEndpoints,
                                                             java.util.Collection<java.net.InetAddress> pendingEndpoints,
                                                             ConsistencyLevel consistency_level,
                                                             java.lang.Runnable callback,
                                                             WriteType writeType)

    - #### getReplicationFactor

          public abstract int getReplicationFactor()

      calculate the RF based on strategy_options. When overwriting, ensure that this get() is FAST, as this is called often.
      Returns:
        the replication factor

    - #### getAddressRanges

          public com.google.common.collect.Multimap<java.net.InetAddress,Range<Token>> getAddressRanges(TokenMetadata metadata)

    - #### getRangeAddresses

          public com.google.common.collect.Multimap<Range<Token>,java.net.InetAddress> getRangeAddresses(TokenMetadata metadata)

    - #### getAddressRanges

          public com.google.common.collect.Multimap<java.net.InetAddress,Range<Token>> getAddressRanges()

    - #### getPendingAddressRanges

          public java.util.Collection<Range<Token>> getPendingAddressRanges(TokenMetadata metadata,
                                                                   Token pendingToken,
                                                                   java.net.InetAddress pendingAddress)

    - #### getPendingAddressRanges

          public java.util.Collection<Range<Token>> getPendingAddressRanges(TokenMetadata metadata,
                                                                   java.util.Collection<Token> pendingTokens,
                                                                   java.net.InetAddress pendingAddress)

    - #### validateOptions

          public abstract void validateOptions()
                                        throws ConfigurationException

      Throws:
        `ConfigurationException`

    - #### recognizedOptions

          public java.util.Collection<java.lang.String> recognizedOptions()

    - #### createReplicationStrategy

          public static AbstractReplicationStrategy createReplicationStrategy(java.lang.String keyspaceName,
                                                              java.lang.Class<? extends AbstractReplicationStrategy> strategyClass,
                                                              TokenMetadata tokenMetadata,
                                                              IEndpointSnitch snitch,
                                                              java.util.Map<java.lang.String,java.lang.String> strategyOptions)

    - #### validateReplicationStrategy

          public static void validateReplicationStrategy(java.lang.String keyspaceName,
                                         java.lang.Class<? extends AbstractReplicationStrategy> strategyClass,
                                         TokenMetadata tokenMetadata,
                                         IEndpointSnitch snitch,
                                         java.util.Map<java.lang.String,java.lang.String> strategyOptions)
                                                  throws ConfigurationException

      Throws:
        `ConfigurationException`

    - #### getClass

          public static java.lang.Class<AbstractReplicationStrategy> getClass(java.lang.String cls)
                                                                       throws ConfigurationException

      Throws:
        `ConfigurationException`

    - #### validateReplicationFactor

          protected void validateReplicationFactor(java.lang.String rf)
                                            throws ConfigurationException

      Throws:
        `ConfigurationException`

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