com.hazelcast.config

## Class TopicConfig

- java.lang.Object
- - com.hazelcast.config.TopicConfig

- All Implemented Interfaces:
    NamedConfig, DataSerializable, IdentifiedDataSerializable
  Direct Known Subclasses:
    TopicConfigReadOnly

      public class TopicConfig
      extends Object
      implements IdentifiedDataSerializable, NamedConfig

  Contains the configuration for a `ITopic`.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static boolean` | `DEFAULT_GLOBAL_ORDERING_ENABLED` Default global ordering configuration.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `TopicConfig()` Creates a TopicConfig.
    `TopicConfig(String name)` Creates a TopicConfig with the given name.
    `TopicConfig(TopicConfig config)` Creates a `TopicConfig` by cloning another TopicConfig.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `TopicConfig` | `addMessageListenerConfig(ListenerConfig listenerConfig)` Adds a message listener to this topic (listens for when messages are added or removed).
    `boolean` | `equals(Object o)`
    `TopicConfigReadOnly` | `getAsReadOnly()` Deprecated. this method will be removed in 4.0; it is meant for internal usage only
    `int` | `getFactoryId()` Returns DataSerializableFactory factory ID for this class.
    `int` | `getId()` Returns type identifier for this class.
    `List<ListenerConfig>` | `getMessageListenerConfigs()` Gets the list of message listeners (listens for when messages are added or removed) for this topic.
    `String` | `getName()` Gets the name of the topic, null if nothing is set.
    `int` | `hashCode()`
    `boolean` | `isGlobalOrderingEnabled()` Checks if global ordering is enabled (all nodes listening to the same topic get their messages in the same order), or disabled (nodes get the messages in the order that the messages are published).
    `boolean` | `isMultiThreadingEnabled()` Checks if multi-threaded processing of incoming messages is enabled or not.
    `boolean` | `isStatisticsEnabled()` Checks if statistics are enabled for this topic.
    `void` | `readData(ObjectDataInput in)` Reads fields from the input stream
    `TopicConfig` | `setGlobalOrderingEnabled(boolean globalOrderingEnabled)` Enable global ordering (all nodes listening to the same topic get their messages in the same order), or disable it (nodes get the messages in the order that the messages are published).
    `TopicConfig` | `setMessageListenerConfigs(List<ListenerConfig> listenerConfigs)` Sets the list of message listeners (listens for when messages are added or removed) for this topic.
    `TopicConfig` | `setMultiThreadingEnabled(boolean multiThreadingEnabled)` Enable multi-threaded message handling.
    `TopicConfig` | `setName(String name)` Sets the name of the topic.
    `TopicConfig` | `setStatisticsEnabled(boolean statisticsEnabled)` Enables or disables statistics for this topic.
    `String` | `toString()`
    `void` | `writeData(ObjectDataOutput out)` Writes object fields to output stream

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

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

- - ### Field Detail

    - #### DEFAULT_GLOBAL_ORDERING_ENABLED

          public static final boolean DEFAULT_GLOBAL_ORDERING_ENABLED

      Default global ordering configuration.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### TopicConfig

          public TopicConfig()

      Creates a TopicConfig.

    - #### TopicConfig

          public TopicConfig(String name)

      Creates a TopicConfig with the given name.
      Parameters:
        `name` - the name of the Topic

    - #### TopicConfig

          public TopicConfig(TopicConfig config)

      Creates a `TopicConfig` by cloning another TopicConfig.
      Parameters:
        `config` - the TopicConfig to clone

  - ### Method Detail

    - #### getAsReadOnly

          public TopicConfigReadOnly getAsReadOnly()

      Deprecated. this method will be removed in 4.0; it is meant for internal usage only
      Gets immutable version of this configuration.
      Returns:
        immutable version of this configuration

    - #### getName

          public String getName()

      Gets the name of the topic, null if nothing is set.
      Specified by:
        `getName` in interface `NamedConfig`
      Returns:
        the name of the topic

    - #### setName

          public TopicConfig setName(String name)

      Sets the name of the topic.
      Specified by:
        `setName` in interface `NamedConfig`
      Parameters:
        `name` - the topic name to set
      Returns:
        the updated `TopicConfig`
      Throws:
        `IllegalArgumentException` - if name is `null` or an empty string

    - #### isGlobalOrderingEnabled

          public boolean isGlobalOrderingEnabled()

      Checks if global ordering is enabled (all nodes listening to the same topic get their messages in the same order), or disabled (nodes get the messages in the order that the messages are published).
      Returns:
        true if global ordering is enabled, false if disabled

    - #### setGlobalOrderingEnabled

          public TopicConfig setGlobalOrderingEnabled(boolean globalOrderingEnabled)

      Enable global ordering (all nodes listening to the same topic get their messages in the same order), or disable it (nodes get the messages in the order that the messages are published).
      Parameters:
        `globalOrderingEnabled` - set to `true` to enable global ordering, `false` to disable
      Returns:
        the updated TopicConfig

    - #### isMultiThreadingEnabled

          public boolean isMultiThreadingEnabled()

      Checks if multi-threaded processing of incoming messages is enabled or not. When disabled only one dedicated thread will handle all topic messages. Otherwise any thread from events thread pool can be used for message handling.
      Returns:
        `true` if multi-threading is enabled, `false` if disabled

    - #### setMultiThreadingEnabled

          public TopicConfig setMultiThreadingEnabled(boolean multiThreadingEnabled)

      Enable multi-threaded message handling. When enabled any thread from events thread pool can be used for incoming message processing. Otherwise only one dedicated thread will be used to handle topic messages. Note: it can be enabled only in case when global ordering is disabled. Moreover, the local message ordering is not supported in this mode also. This means the messages produced by local publisher can be processed by several threads with no ordering guarantee.
      Parameters:
        `multiThreadingEnabled` - set to `true` to enable multi-threaded message processing, `false` to disable
      Returns:
        the updated TopicConfig

    - #### addMessageListenerConfig

          public TopicConfig addMessageListenerConfig(ListenerConfig listenerConfig)

      Adds a message listener to this topic (listens for when messages are added or removed).
      Parameters:
        `listenerConfig` - the message listener to add to this topic

    - #### getMessageListenerConfigs

          public List<ListenerConfig> getMessageListenerConfigs()

      Gets the list of message listeners (listens for when messages are added or removed) for this topic.
      Returns:
        the list of message listeners for this topic

    - #### setMessageListenerConfigs

          public TopicConfig setMessageListenerConfigs(List<ListenerConfig> listenerConfigs)

      Sets the list of message listeners (listens for when messages are added or removed) for this topic.
      Parameters:
        `listenerConfigs` - the list of message listeners for this topic
      Returns:
        this updated topic configuration

    - #### isStatisticsEnabled

          public boolean isStatisticsEnabled()

      Checks if statistics are enabled for this topic.
      Returns:
        `true` if statistics are enabled, `false` otherwise

    - #### setStatisticsEnabled

          public TopicConfig setStatisticsEnabled(boolean statisticsEnabled)

      Enables or disables statistics for this topic.
      Parameters:
        `statisticsEnabled` - `true` to enable statistics for this topic, `false` to disable
      Returns:
        the updated TopicConfig

    - #### equals

          public final boolean equals(Object o)

      Overrides:
        `equals` in class `Object`

    - #### hashCode

          public final int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

    - #### getFactoryId

          public int getFactoryId()

      Description copied from interface: `IdentifiedDataSerializable`
      Returns DataSerializableFactory factory ID for this class.
      Specified by:
        `getFactoryId` in interface `IdentifiedDataSerializable`
      Returns:
        factory ID

    - #### getId

          public int getId()

      Description copied from interface: `IdentifiedDataSerializable`
      Returns type identifier for this class. It should be unique per DataSerializableFactory.
      Specified by:
        `getId` in interface `IdentifiedDataSerializable`
      Returns:
        type ID

    - #### writeData

          public void writeData(ObjectDataOutput out)
                         throws IOException

      Description copied from interface: `DataSerializable`
      Writes object fields to output stream
      Specified by:
        `writeData` in interface `DataSerializable`
      Parameters:
        `out` - output
      Throws:
        `IOException` - if an I/O error occurs. In particular, an `IOException` may be thrown if the output stream has been closed.

    - #### readData

          public void readData(ObjectDataInput in)
                        throws IOException

      Description copied from interface: `DataSerializable`
      Reads fields from the input stream
      Specified by:
        `readData` in interface `DataSerializable`
      Parameters:
        `in` - input
      Throws:
        `IOException` - if an I/O error occurs. In particular, an `IOException` may be thrown if the input stream has been closed.

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