org.apache.cassandra.db

## Class Keyspace

- java.lang.Object
- - org.apache.cassandra.db.Keyspace

-     public class Keyspace
      extends java.lang.Object

  It represents a Keyspace.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static com.google.common.base.Function<java.lang.String,Keyspace>` | `keyspaceTransformer`
    `KeyspaceMetrics` | `metric`
    `OpOrder` | `writeOrder`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static java.lang.Iterable<Keyspace>` | `all()`
    `void` | `apply(Mutation mutation, boolean writeCommitLog)`
    `void` | `apply(Mutation mutation, boolean writeCommitLog, boolean updateIndexes)` This method appends a row to the global CommitLog, then updates memtables and indexes.
    `static Keyspace` | `clear(java.lang.String keyspaceName)`
    `static Keyspace` | `clear(java.lang.String keyspaceName, Schema schema)`
    `static void` | `clearSnapshot(java.lang.String snapshotName, java.lang.String keyspace)` Clear all the snapshots for a given keyspace.
    `void` | `dropCf(java.util.UUID cfId)`
    `java.util.List<java.util.concurrent.Future<?>>` | `flush()`
    `java.util.List<SSTableReader>` | `getAllSSTables()`
    `ColumnFamilyStore` | `getColumnFamilyStore(java.lang.String cfName)`
    `ColumnFamilyStore` | `getColumnFamilyStore(java.util.UUID id)`
    `java.util.Collection<ColumnFamilyStore>` | `getColumnFamilyStores()`
    `KSMetaData` | `getMetadata()`
    `java.lang.String` | `getName()`
    `AbstractReplicationStrategy` | `getReplicationStrategy()`
    `Row` | `getRow(QueryFilter filter)`
    `static java.lang.String` | `getTimestampedSnapshotName(java.lang.String clientSuppliedName)`
    `java.lang.Iterable<ColumnFamilyStore>` | `getValidColumnFamilies(boolean allowIndexes, boolean autoAddIndexes, java.lang.String... cfNames)`
    `static void` | `indexRow(DecoratedKey key, ColumnFamilyStore cfs, java.util.Set<java.lang.String> idxNames)`
    `void` | `initCf(CFMetaData metadata, boolean loadSSTables)` adds a cf to internal structures, ends up creating disk files).
    `static Keyspace` | `mockKS(KSMetaData metadata)`
    `static java.lang.Iterable<Keyspace>` | `nonSystem()`
    `static Keyspace` | `open(java.lang.String keyspaceName)`
    `static Keyspace` | `openWithoutSSTables(java.lang.String keyspaceName)`
    `static void` | `removeUnreadableSSTables(java.io.File directory)` Removes every SSTable in the directory from the appropriate Tracker's view.
    `static void` | `setInitialized()`
    `void` | `setMetadata(KSMetaData ksm)`
    `void` | `snapshot(java.lang.String snapshotName, java.lang.String columnFamilyName)` Take a snapshot of the specific column family, or the entire set of column families if columnFamily is null with a given timestamp
    `boolean` | `snapshotExists(java.lang.String snapshotName)` Check whether snapshots already exists for a given name.
    `static java.lang.Iterable<Keyspace>` | `system()`
    `java.lang.String` | `toString()`

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

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

- - ### Field Detail

    - #### metric

          public final KeyspaceMetrics metric

    - #### writeOrder

          public final OpOrder writeOrder

    - #### keyspaceTransformer

          public static final com.google.common.base.Function<java.lang.String,Keyspace> keyspaceTransformer

  - ### Method Detail

    - #### setInitialized

          public static void setInitialized()

    - #### open

          public static Keyspace open(java.lang.String keyspaceName)

    - #### openWithoutSSTables

          public static Keyspace openWithoutSSTables(java.lang.String keyspaceName)

    - #### clear

          public static Keyspace clear(java.lang.String keyspaceName)

    - #### clear

          public static Keyspace clear(java.lang.String keyspaceName,
                                       Schema schema)

    - #### removeUnreadableSSTables

          public static void removeUnreadableSSTables(java.io.File directory)

      Removes every SSTable in the directory from the appropriate Tracker's view.
      Parameters:
        `directory` - the unreadable directory, possibly with SSTables in it, but not necessarily.

    - #### getColumnFamilyStores

          public java.util.Collection<ColumnFamilyStore> getColumnFamilyStores()

    - #### getColumnFamilyStore

          public ColumnFamilyStore getColumnFamilyStore(java.lang.String cfName)

    - #### getColumnFamilyStore

          public ColumnFamilyStore getColumnFamilyStore(java.util.UUID id)

    - #### snapshot

          public void snapshot(java.lang.String snapshotName,
                               java.lang.String columnFamilyName)
                        throws java.io.IOException

      Take a snapshot of the specific column family, or the entire set of column families if columnFamily is null with a given timestamp
      Parameters:
        `snapshotName` - the tag associated with the name of the snapshot. This value may not be null
        `columnFamilyName` - the column family to snapshot or all on null
      Throws:
        `java.io.IOException` - if the column family doesn't exist

    - #### getTimestampedSnapshotName

          public static java.lang.String getTimestampedSnapshotName(java.lang.String clientSuppliedName)

      Parameters:
        `clientSuppliedName` - may be null.
      Returns:
        the name of the snapshot

    - #### snapshotExists

          public boolean snapshotExists(java.lang.String snapshotName)

      Check whether snapshots already exists for a given name.
      Parameters:
        `snapshotName` - the user supplied snapshot name
      Returns:
        true if the snapshot exists

    - #### clearSnapshot

          public static void clearSnapshot(java.lang.String snapshotName,
                                           java.lang.String keyspace)

      Clear all the snapshots for a given keyspace.
      Parameters:
        `snapshotName` - the user supplied snapshot name. It empty or null, all the snapshots will be cleaned

    - #### getAllSSTables

          public java.util.List<SSTableReader> getAllSSTables()

      Returns:
        A list of open SSTableReaders

    - #### mockKS

          public static Keyspace mockKS(KSMetaData metadata)

    - #### setMetadata

          public void setMetadata(KSMetaData ksm)

    - #### getMetadata

          public KSMetaData getMetadata()

    - #### dropCf

          public void dropCf(java.util.UUID cfId)

    - #### initCf

          public void initCf(CFMetaData metadata,
                             boolean loadSSTables)

      adds a cf to internal structures, ends up creating disk files).

    - #### getRow

          public Row getRow(QueryFilter filter)

    - #### apply

          public void apply(Mutation mutation,
                            boolean writeCommitLog)

    - #### apply

          public void apply(Mutation mutation,
                            boolean writeCommitLog,
                            boolean updateIndexes)

      This method appends a row to the global CommitLog, then updates memtables and indexes.
      Parameters:
        `mutation` - the row to write. Must not be modified after calling apply, since commitlog append may happen concurrently, depending on the CL Executor type.
        `writeCommitLog` - false to disable commitlog append entirely
        `updateIndexes` - false to disable index updates (used by CollationController "defragmenting")

    - #### getReplicationStrategy

          public AbstractReplicationStrategy getReplicationStrategy()

    - #### indexRow

          public static void indexRow(DecoratedKey key,
                                      ColumnFamilyStore cfs,
                                      java.util.Set<java.lang.String> idxNames)

      Parameters:
        `key` - row to index
        `cfs` - ColumnFamily to index row in
        `idxNames` - columns to index, in comparator order

    - #### flush

          public java.util.List<java.util.concurrent.Future<?>> flush()

    - #### getValidColumnFamilies

          public java.lang.Iterable<ColumnFamilyStore> getValidColumnFamilies(boolean allowIndexes,
                                                                              boolean autoAddIndexes,
                                                                              java.lang.String... cfNames)
                                                                       throws java.io.IOException

      Throws:
        `java.io.IOException`

    - #### all

          public static java.lang.Iterable<Keyspace> all()

    - #### nonSystem

          public static java.lang.Iterable<Keyspace> nonSystem()

    - #### system

          public static java.lang.Iterable<Keyspace> system()

    - #### toString

          public java.lang.String toString()

      Overrides:
        `toString` in class `java.lang.Object`

    - #### getName

          public java.lang.String getName()

Copyright © 2018 The Apache Software Foundation