# Uses of Package
org.apache.cassandra.utils.concurrent

- Packages that use org.apache.cassandra.utils.concurrent
  Package | Description
  --- | ---
  org.apache.cassandra.db |
  org.apache.cassandra.db.commitlog |
  org.apache.cassandra.db.index |
  org.apache.cassandra.db.index.composites |
  org.apache.cassandra.service |
  org.apache.cassandra.utils.concurrent |
  org.apache.cassandra.utils.memory |

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.db
  Class and Description
  OpOrder A class for providing synchronization between producers and consumers that do not communicate directly with each other, but where the consumers need to process their work in contiguous batches.
  OpOrder.Group Represents a group of identically ordered operations, i.e.

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.db.commitlog
  Class and Description
  WaitQueue A relatively easy to use utility for general purpose thread signalling.
  WaitQueue.Signal A Signal is a one-time-use mechanism for a thread to wait for notification that some condition state has transitioned that it may be interested in (and hence should check if it is).

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.db.index
  Class and Description
  OpOrder.Group Represents a group of identically ordered operations, i.e.

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.db.index.composites
  Class and Description
  OpOrder.Group Represents a group of identically ordered operations, i.e.

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.service
  Class and Description
  SimpleCondition

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.utils.concurrent
  Class and Description
  OpOrder.Barrier This class represents a synchronisation point providing ordering guarantees on operations started against the enclosing OpOrder.
  OpOrder.Group Represents a group of identically ordered operations, i.e.
  WaitQueue.Signal A Signal is a one-time-use mechanism for a thread to wait for notification that some condition state has transitioned that it may be interested in (and hence should check if it is).

- Classes in org.apache.cassandra.utils.concurrent used by org.apache.cassandra.utils.memory
  Class and Description
  OpOrder.Group Represents a group of identically ordered operations, i.e.
  WaitQueue A relatively easy to use utility for general purpose thread signalling.

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