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

org.apache.cassandra.service

## Class RowDataResolver

- java.lang.Object
- - org.apache.cassandra.service.AbstractRowResolver
  - - org.apache.cassandra.service.RowDataResolver

- All Implemented Interfaces:
    IResponseResolver<ReadResponse,Row>

      public class RowDataResolver
      extends AbstractRowResolver

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `java.util.List<AsyncOneResponse>` | `repairResults`

    - ### Fields inherited from class org.apache.cassandra.service.AbstractRowResolver

      `key, keyspaceName, logger, replies`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `RowDataResolver(java.lang.String keyspaceName, java.nio.ByteBuffer key, IDiskAtomFilter qFilter, long timestamp)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Row` | `getData()` returns the data response without comparing with any digests
    `int` | `getMaxLiveCount()`
    `boolean` | `isDataPresent()`
    `Row` | `resolve()` This Method resolves the responses that are passed in .
    `static java.util.List<AsyncOneResponse>` | `scheduleRepairs(ColumnFamily resolved, java.lang.String keyspaceName, DecoratedKey key, java.util.List<ColumnFamily> versions, java.util.List<java.net.InetAddress> endpoints)` For each row version, compare with resolved (the superset of all row versions); if it is missing anything, send a mutation to the endpoint it come from.

    - ### Methods inherited from class org.apache.cassandra.service.AbstractRowResolver

      `getMessages, preprocess`

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

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

- - ### Field Detail

    - #### repairResults

          public java.util.List<AsyncOneResponse> repairResults

  - ### Constructor Detail

    - #### RowDataResolver

          public RowDataResolver(java.lang.String keyspaceName,
                         java.nio.ByteBuffer key,
                         IDiskAtomFilter qFilter,
                         long timestamp)

  - ### Method Detail

    - #### resolve

          public Row resolve()
                      throws DigestMismatchException

      Description copied from interface: `IResponseResolver`
      This Method resolves the responses that are passed in . for example : if its write response then all we get is true or false return values which implies if the writes were successful but for reads its more complicated you need to look at the responses and then based on differences schedule repairs . Hence you need to derive a response resolver based on your needs from this interface.
      Throws:
        `DigestMismatchException`

    - #### scheduleRepairs

          public static java.util.List<AsyncOneResponse> scheduleRepairs(ColumnFamily resolved,
                                                         java.lang.String keyspaceName,
                                                         DecoratedKey key,
                                                         java.util.List<ColumnFamily> versions,
                                                         java.util.List<java.net.InetAddress> endpoints)

      For each row version, compare with resolved (the superset of all row versions); if it is missing anything, send a mutation to the endpoint it come from.

    - #### getData

          public Row getData()

      Description copied from interface: `IResponseResolver`
      returns the data response without comparing with any digests

    - #### isDataPresent

          public boolean isDataPresent()

    - #### getMaxLiveCount

          public int getMaxLiveCount()

Copyright © 2014 The Apache Software Foundation