io.vertx.spi.cluster.hazelcast

## Class HazelcastClusterManager

- java.lang.Object
- - io.vertx.spi.cluster.hazelcast.HazelcastClusterManager

- All Implemented Interfaces:
    MembershipListener, LifecycleListener, ClusterManager, VertxServiceProvider, EventListener

      public class HazelcastClusterManager
      extends Object
      implements ClusterManager, MembershipListener, LifecycleListener

  A cluster manager that uses Hazelcast
  Author:
    Tim Fox

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `HazelcastClusterManager()` Constructor - gets config from classpath
    `HazelcastClusterManager(Config conf)` Constructor - config supplied
    `HazelcastClusterManager(HazelcastInstance instance)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addRegistration(String address, RegistrationInfo registrationInfo, Promise<Void> promise)` Share a new messaging handler registration with other nodes in the cluster.
    `String` | `clusterHost()` If the cluster manager has its own server for data/membership, this returns the host it is listening to.
    `String` | `clusterPublicHost()` If the cluster manager has its own server for data/membership, this returns the host it advertises to other nodes.
    `<K,V> void` | `getAsyncMap(String name, Promise<AsyncMap<K,V>> promise)` Return an `AsyncMap` for the given `name`.
    `Config` | `getConfig()` Get the Hazelcast config.
    `void` | `getCounter(String name, Promise<Counter> promise)` Return a `Counter` for the given `name`.
    `HazelcastInstance` | `getHazelcastInstance()`
    `void` | `getLockWithTimeout(String name, long timeout, Promise<Lock> promise)` Attempts to acquire a `Lock` for the given `name` within `timeout` milliseconds.
    `String` | `getNodeId()` Return the unique node identifier for this node.
    `NodeInfo` | `getNodeInfo()` Get details about this clustered node.
    `void` | `getNodeInfo(String nodeId, Promise<NodeInfo> promise)` Get details about a specific node in the cluster.
    `List<String>` | `getNodes()` Return a list of node identifiers corresponding to the nodes in the cluster.
    `void` | `getRegistrations(String address, Promise<List<RegistrationInfo>> promise)` Get the messaging handler currently registered in the cluster.
    `<K,V> Map<K,V>` | `getSyncMap(String name)` Return a synchronous map for the given `name`.
    `void` | `init(Vertx vertx, NodeSelector nodeSelector)` Invoked before this cluster node tries to join the cluster.
    `boolean` | `isActive()` Is the cluster manager active?
    `void` | `join(Promise<Void> promise)` Join the cluster.
    `void` | `leave(Promise<Void> promise)` Leave the cluster.
    `Config` | `loadConfig()` Load Hazelcast config XML and transform it into a `Config` object.
    `void` | `memberAdded(MembershipEvent membershipEvent)`
    `void` | `memberRemoved(MembershipEvent membershipEvent)`
    `void` | `nodeListener(NodeListener listener)` Set a listener that will be called when a node joins or leaves the cluster.
    `void` | `removeRegistration(String address, RegistrationInfo registrationInfo, Promise<Void> promise)` Signal removal of a messaging handler registration to other nodes in the cluster.
    `void` | `setConfig(Config config)` Set the Hazelcast config.
    `void` | `setNodeInfo(NodeInfo nodeInfo, Promise<Void> promise)` Store the details about this clustered node.
    `void` | `stateChanged(LifecycleEvent lifecycleEvent)`

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

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

    - ### Methods inherited from interface io.vertx.core.spi.cluster.ClusterManager

      `init`

- - ### Constructor Detail

    - #### HazelcastClusterManager

          public HazelcastClusterManager()

      Constructor - gets config from classpath

    - #### HazelcastClusterManager

          public HazelcastClusterManager(Config conf)

      Constructor - config supplied
      Parameters:
        `conf` - Hazelcast config, not null

    - #### HazelcastClusterManager

          public HazelcastClusterManager(HazelcastInstance instance)

  - ### Method Detail

    - #### init

          public void init(Vertx vertx,
                           NodeSelector nodeSelector)

      Description copied from interface: `ClusterManager`
      Invoked before this cluster node tries to join the cluster.

      Implementations must signal the provided `nodeSelector` when messaging handler registrations are added or removed by sending a `RegistrationUpdateEvent` with `NodeSelector.registrationsUpdated(RegistrationUpdateEvent)`.

      Specified by:
        `init` in interface `ClusterManager`
      Parameters:
        `vertx` - the Vert.x instance
        `nodeSelector` - the `NodeSelector` that must receive `RegistrationUpdateEvent`.

    - #### join

          public void join(Promise<Void> promise)

      Description copied from interface: `ClusterManager`
      Join the cluster.
      Specified by:
        `join` in interface `ClusterManager`

    - #### getNodeId

          public String getNodeId()

      Description copied from interface: `ClusterManager`
      Return the unique node identifier for this node.
      Specified by:
        `getNodeId` in interface `ClusterManager`

    - #### getNodes

          public List<String> getNodes()

      Description copied from interface: `ClusterManager`
      Return a list of node identifiers corresponding to the nodes in the cluster.
      Specified by:
        `getNodes` in interface `ClusterManager`

    - #### nodeListener

          public void nodeListener(NodeListener listener)

      Description copied from interface: `ClusterManager`
      Set a listener that will be called when a node joins or leaves the cluster.
      Specified by:
        `nodeListener` in interface `ClusterManager`

    - #### setNodeInfo

          public void setNodeInfo(NodeInfo nodeInfo,
                                  Promise<Void> promise)

      Description copied from interface: `ClusterManager`
      Store the details about this clustered node.
      Specified by:
        `setNodeInfo` in interface `ClusterManager`

    - #### getNodeInfo

          public NodeInfo getNodeInfo()

      Description copied from interface: `ClusterManager`
      Get details about this clustered node.
      Specified by:
        `getNodeInfo` in interface `ClusterManager`

    - #### getNodeInfo

          public void getNodeInfo(String nodeId,
                                  Promise<NodeInfo> promise)

      Description copied from interface: `ClusterManager`
      Get details about a specific node in the cluster.
      Specified by:
        `getNodeInfo` in interface `ClusterManager`
      Parameters:
        `nodeId` - the clustered node id

    - #### getAsyncMap

          public <K,V> void getAsyncMap(String name,
                                        Promise<AsyncMap<K,V>> promise)

      Description copied from interface: `ClusterManager`
      Return an `AsyncMap` for the given `name`.
      Specified by:
        `getAsyncMap` in interface `ClusterManager`

    - #### getSyncMap

          public <K,V> Map<K,V> getSyncMap(String name)

      Description copied from interface: `ClusterManager`
      Return a synchronous map for the given `name`.
      Specified by:
        `getSyncMap` in interface `ClusterManager`

    - #### getLockWithTimeout

          public void getLockWithTimeout(String name,
                                         long timeout,
                                         Promise<Lock> promise)

      Description copied from interface: `ClusterManager`
      Attempts to acquire a `Lock` for the given `name` within `timeout` milliseconds.
      Specified by:
        `getLockWithTimeout` in interface `ClusterManager`

    - #### getCounter

          public void getCounter(String name,
                                 Promise<Counter> promise)

      Description copied from interface: `ClusterManager`
      Return a `Counter` for the given `name`.
      Specified by:
        `getCounter` in interface `ClusterManager`

    - #### leave

          public void leave(Promise<Void> promise)

      Description copied from interface: `ClusterManager`
      Leave the cluster.
      Specified by:
        `leave` in interface `ClusterManager`

    - #### memberAdded

          public void memberAdded(MembershipEvent membershipEvent)

      Specified by:
        `memberAdded` in interface `MembershipListener`

    - #### memberRemoved

          public void memberRemoved(MembershipEvent membershipEvent)

      Specified by:
        `memberRemoved` in interface `MembershipListener`

    - #### stateChanged

          public void stateChanged(LifecycleEvent lifecycleEvent)

      Specified by:
        `stateChanged` in interface `LifecycleListener`

    - #### isActive

          public boolean isActive()

      Description copied from interface: `ClusterManager`
      Is the cluster manager active?
      Specified by:
        `isActive` in interface `ClusterManager`
      Returns:
        true if active, false otherwise

    - #### addRegistration

          public void addRegistration(String address,
                                      RegistrationInfo registrationInfo,
                                      Promise<Void> promise)

      Description copied from interface: `ClusterManager`
      Share a new messaging handler registration with other nodes in the cluster.
      Specified by:
        `addRegistration` in interface `ClusterManager`

    - #### removeRegistration

          public void removeRegistration(String address,
                                         RegistrationInfo registrationInfo,
                                         Promise<Void> promise)

      Description copied from interface: `ClusterManager`
      Signal removal of a messaging handler registration to other nodes in the cluster.
      Specified by:
        `removeRegistration` in interface `ClusterManager`

    - #### getRegistrations

          public void getRegistrations(String address,
                                       Promise<List<RegistrationInfo>> promise)

      Description copied from interface: `ClusterManager`
      Get the messaging handler currently registered in the cluster.
      Specified by:
        `getRegistrations` in interface `ClusterManager`

    - #### clusterHost

          public String clusterHost()

      Description copied from interface: `ClusterManager`
      If the cluster manager has its own server for data/membership, this returns the host it is listening to. When users don't configure the eventbus cluster host, the value will serve as a default.
      Specified by:
        `clusterHost` in interface `ClusterManager`
      Returns:
        null if the cluster manager does not start a server or the host couldn't be determined

    - #### clusterPublicHost

          public String clusterPublicHost()

      Description copied from interface: `ClusterManager`
      If the cluster manager has its own server for data/membership, this returns the host it advertises to other nodes. When users don't configure the eventbus cluster public host, the value will serve as a default.
      Specified by:
        `clusterPublicHost` in interface `ClusterManager`
      Returns:
        null if the cluster manager does not advertise a host that is different from the cluster host or the public host couldn't be determined

    - #### getConfig

          public Config getConfig()

      Get the Hazelcast config.
      Returns:
        a config object

    - #### setConfig

          public void setConfig(Config config)

      Set the Hazelcast config.
      Parameters:
        `config` - a config object

    - #### loadConfig

          public Config loadConfig()

      Load Hazelcast config XML and transform it into a `Config` object. The content is read from:
      1. the location denoted by the `vertx.hazelcast.config` sysprop, if present, or
      2. the `cluster.xml` file on the classpath, if present, or
      3. the default config file

      The cluster manager uses this method to load the config when the node joins the cluster, if no config was provided upon creation.

      You may use this method to get a base config and customize it before the node joins the cluster. In this case, don't forget to invoke `setConfig(Config)` after you applied your changes.

      Returns:
        a config object

    - #### getHazelcastInstance

          public HazelcastInstance getHazelcastInstance()

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