HazelcastInstance (Hazelcast Root 3.4 API)

All Known Subinterfaces:

HazelcastConnection

All Known Implementing Classes:

HazelcastClientInstanceImpl, HazelcastClientProxy, HazelcastConnectionImpl, HazelcastInstanceImpl, HazelcastInstanceProxy
```
public interface HazelcastInstance
```
Hazelcast instance. Each Hazelcast instance is a member (node) in a cluster. Multiple Hazelcast instances can be created on a JVM. Each Hazelcast instance has its own socket, threads.

See Also:
Hazelcast.newHazelcastInstance(Config config)

Method Summary

Methods
Modifier and Type	Method and Description
`String`	`addDistributedObjectListener(DistributedObjectListener distributedObjectListener)` Adds a Distributed Object listener which will be notified when a new `DistributedObject` will be created or destroyed.
`<T> T`	`executeTransaction(TransactionalTask<T> task)` Executes the given transactional task in current thread using default options and returns the result of the task.
`<T> T`	`executeTransaction(TransactionOptions options, TransactionalTask<T> task)` Executes the given transactional task in current thread using given options and returns the result of the task.
`IAtomicLong`	`getAtomicLong(String name)` Creates cluster-wide atomic long.
`<E> IAtomicReference<E>`	`getAtomicReference(String name)` Creates cluster-wide atomic reference.
`ClientService`	`getClientService()` Returns the client service of this Hazelcast instance.
`Cluster`	`getCluster()` Returns the Cluster that this Hazelcast instance is part of.
`Config`	`getConfig()` Returns the configuration of this Hazelcast instance.
`ICountDownLatch`	`getCountDownLatch(String name)` Creates cluster-wide CountDownLatch.
`<T extends DistributedObject> T`	`getDistributedObject(String serviceName, Object id)` Deprecated. use `getDistributedObject(String, String)` instead.
`<T extends DistributedObject> T`	`getDistributedObject(String serviceName, String name)`
`Collection<DistributedObject>`	`getDistributedObjects()` Returns all `DistributedObject`'s such as; queue, map, set, list, topic, lock, multimap.
`IExecutorService`	`getExecutorService(String name)` Returns the distributed executor service for the given name.
`IdGenerator`	`getIdGenerator(String name)` Creates cluster-wide unique IDs.
`JobTracker`	`getJobTracker(String name)` Returns the job tracker instance with the specified name.
`LifecycleService`	`getLifecycleService()` Returns the lifecycle service for this instance.
`<E> IList<E>`	`getList(String name)` Returns the distributed list instance with the specified name.
`Endpoint`	`getLocalEndpoint()` Returns the local Endpoint which this HazelcastInstance belongs to.
`ILock`	`getLock(Object key)` Deprecated. will be removed in Hazelcast 3.2. Use `getLock(String)` instead.
`ILock`	`getLock(String key)` Returns the distributed lock instance for the specified key object.
`LoggingService`	`getLoggingService()` Returns the logging service of this Hazelcast instance.
`<K,V> IMap<K,V>`	`getMap(String name)` Returns the distributed map instance with the specified name.
`<K,V> MultiMap<K,V>`	`getMultiMap(String name)` Returns the distributed multimap instance with the specified name.
`String`	`getName()` Returns the name of this Hazelcast instance
`PartitionService`	`getPartitionService()` Returns the partition service of this Hazelcast instance.
`<E> IQueue<E>`	`getQueue(String name)` Returns the distributed queue instance with the specified name.
`<K,V> ReplicatedMap<K,V>`	`getReplicatedMap(String name)` Returns the replicated map instance with the specified name.
`ISemaphore`	`getSemaphore(String name)` Creates cluster-wide semaphore.
`<E> ISet<E>`	`getSet(String name)` Returns the distributed set instance with the specified name.
`<E> ITopic<E>`	`getTopic(String name)` Returns the distributed topic instance with the specified name.
`ConcurrentMap<String,Object>`	`getUserContext()` Returns a ConcurrentMap that can be used to add user-context to the HazelcastInstance.
`TransactionContext`	`newTransactionContext()` Creates a new TransactionContext associated with the current thread using default options.
`TransactionContext`	`newTransactionContext(TransactionOptions options)` Creates a new TransactionContext associated with the current thread with given options.
`boolean`	`removeDistributedObjectListener(String registrationId)` Removes the specified Distributed Object listener.
`void`	`shutdown()` Shuts down this HazelcastInstance.

- Method Detail
  - getName
```
String getName()
```
    Returns the name of this Hazelcast instance
    
    Returns:
    name of this Hazelcast instance
  - getQueue
```
<E> IQueue<E> getQueue(String name)
```
    Returns the distributed queue instance with the specified name.
    
    Parameters:
    name - name of the distributed queue
    
    Returns:
    distributed queue instance with the specified name
  - getTopic
```
<E> ITopic<E> getTopic(String name)
```
    Returns the distributed topic instance with the specified name.
    
    Parameters:
    name - name of the distributed topic
    
    Returns:
    distributed topic instance with the specified name
  - getSet
```
<E> ISet<E> getSet(String name)
```
    Returns the distributed set instance with the specified name.
    
    Parameters:
    name - name of the distributed set
    
    Returns:
    distributed set instance with the specified name
  - getList
```
<E> IList<E> getList(String name)
```
    Returns the distributed list instance with the specified name. Index based operations on the list are not supported.
    
    Parameters:
    name - name of the distributed list
    
    Returns:
    distributed list instance with the specified name
  - getMap
```
<K,V> IMap<K,V> getMap(String name)
```
    Returns the distributed map instance with the specified name.
    
    Parameters:
    name - name of the distributed map
    
    Returns:
    distributed map instance with the specified name
  - getReplicatedMap
```
<K,V> ReplicatedMap<K,V> getReplicatedMap(String name)
```
    Returns the replicated map instance with the specified name.
    
    Parameters:
    name - name of the distributed map
    
    Returns:
    replicated map instance with specified name
    Since:
    
    3.2
  - getJobTracker
```
JobTracker getJobTracker(String name)
```
    Returns the job tracker instance with the specified name.
    
    Parameters:
    name - name of the job tracker
    
    Returns:
    job tracker instance with the specified name
    Since:
    
    3.2
  - getMultiMap
```
<K,V> MultiMap<K,V> getMultiMap(String name)
```
    Returns the distributed multimap instance with the specified name.
    
    Parameters:
    name - name of the distributed multimap
    
    Returns:
    distributed multimap instance with the specified name
  - getLock
```
ILock getLock(String key)
```
    Returns the distributed lock instance for the specified key object. The specified object is considered to be the key for this lock. So keys are considered equals cluster-wide as long as they are serialized to the same byte array such as String, long, Integer.
    Locks are fail-safe. If a member holds a lock and some of the members go down, the cluster will keep your locks safe and available. Moreover, when a member leaves the cluster, all the locks acquired by this dead member will be removed so that these locks can be available for live members immediately.
```
 Lock lock = hazelcastInstance.getLock("PROCESS_LOCK");
 lock.lock();
 try {
   // process
 } finally {
   lock.unlock();
 }
 
```
    Parameters:
    key - key of the lock instance
    
    Returns:
    distributed lock instance for the specified key.
  - getLock
```
@Deprecated
ILock getLock(Object key)
```
    Deprecated. will be removed in Hazelcast 3.2. Use getLock(String) instead.
  - getCluster
```
Cluster getCluster()
```
    Returns the Cluster that this Hazelcast instance is part of. Cluster interface allows you to add a listener for membership events and to learn more about the cluster that this Hazelcast instance is part of.
    
    Returns:
    the cluster that this Hazelcast instance is part of
  - getLocalEndpoint
```
Endpoint getLocalEndpoint()
```
    Returns the local Endpoint which this HazelcastInstance belongs to.
    Returned endpoint will be a Member instance for cluster nodes and a Client instance for clients.
    
    Returns:
    the local Endpoint which this HazelcastInstance belongs to
    See Also:
    Member, Client
  - getExecutorService
```
IExecutorService getExecutorService(String name)
```
    Returns the distributed executor service for the given name. Executor service enables you to run your Runnables and Callables on the Hazelcast cluster.
    
    Note: Note that it don't support invokeAll/Any and don't have standard shutdown behavior
    
    Parameters:
    name - name of the executor service
    
    Returns:
    the distributed executor service for the given name
  - executeTransaction
```
<T> T executeTransaction(TransactionalTask<T> task)
                     throws TransactionException
```
    Executes the given transactional task in current thread using default options and returns the result of the task.
    
    Type Parameters:
    T - return type of task
    Parameters:
    task - the transactional task to be executed
    
    Returns:
    result of the transactional task
    
    Throws:
    
    TransactionException - if an error occurs during transaction.
  - executeTransaction
```
<T> T executeTransaction(TransactionOptions options,
                       TransactionalTask<T> task)
                     throws TransactionException
```
    Executes the given transactional task in current thread using given options and returns the result of the task.
    
    Type Parameters:
    T - return type of task
    Parameters:
    options - options for this transactional task
    task - task to be executed
    
    Returns:
    result of the transactional task
    
    Throws:
    
    TransactionException - if an error occurs during transaction.
  - newTransactionContext
```
TransactionContext newTransactionContext()
```
    Creates a new TransactionContext associated with the current thread using default options.
    
    Returns:
    new TransactionContext associated with the current thread
  - newTransactionContext
```
TransactionContext newTransactionContext(TransactionOptions options)
```
    Creates a new TransactionContext associated with the current thread with given options.
    
    Parameters:
    options - options for this transaction
    
    Returns:
    new TransactionContext associated with the current thread
  - getIdGenerator
```
IdGenerator getIdGenerator(String name)
```
    Creates cluster-wide unique IDs. Generated IDs are long type primitive values between 0 and Long.MAX_VALUE . Id generation occurs almost at the speed of AtomicLong.incrementAndGet() . Generated IDs are unique during the life cycle of the cluster. If the entire cluster is restarted, IDs start from 0 again.
    
    Parameters:
    name - name of the IdGenerator
    
    Returns:
    IdGenerator for the given name
  - getAtomicLong
```
IAtomicLong getAtomicLong(String name)
```
    Creates cluster-wide atomic long. Hazelcast IAtomicLong is distributed implementation of java.util.concurrent.atomic.AtomicLong.
    
    Parameters:
    name - name of the IAtomicLong proxy
    
    Returns:
    IAtomicLong proxy for the given name
  - getAtomicReference
```
<E> IAtomicReference<E> getAtomicReference(String name)
```
    Creates cluster-wide atomic reference. Hazelcast IAtomicReference is distributed implementation of java.util.concurrent.atomic.AtomicReference.
    
    Parameters:
    name - name of the IAtomicReference proxy
    
    Returns:
    IAtomicReference proxy for the given name
  - getCountDownLatch
```
ICountDownLatch getCountDownLatch(String name)
```
    Creates cluster-wide CountDownLatch. Hazelcast ICountDownLatch is distributed implementation of java.util.concurrent.CountDownLatch.
    
    Parameters:
    name - name of the ICountDownLatch proxy
    
    Returns:
    ICountDownLatch proxy for the given name
  - getSemaphore
```
ISemaphore getSemaphore(String name)
```
    Creates cluster-wide semaphore. Hazelcast ISemaphore is distributed implementation of java.util.concurrent.Semaphore.
    
    Parameters:
    name - name of the ISemaphore proxy
    
    Returns:
    ISemaphore proxy for the given name
  - getDistributedObjects
```
Collection<DistributedObject> getDistributedObjects()
```
    Returns all DistributedObject's such as; queue, map, set, list, topic, lock, multimap.
    
    Returns:
    the collection of instances created by Hazelcast.
  - addDistributedObjectListener
```
String addDistributedObjectListener(DistributedObjectListener distributedObjectListener)
```
    Adds a Distributed Object listener which will be notified when a new DistributedObject will be created or destroyed.
    
    Parameters:
    distributedObjectListener - instance listener
    
    Returns:
    returns registration id.
  - removeDistributedObjectListener
```
boolean removeDistributedObjectListener(String registrationId)
```
    Removes the specified Distributed Object listener. Returns silently if the specified instance listener does not exist.
    
    Parameters:
    registrationId - Id of listener registration.
    
    Returns:
    true if registration is removed, false otherwise
  - getConfig
```
Config getConfig()
```
    Returns the configuration of this Hazelcast instance.
    
    Returns:
    configuration of this Hazelcast instance
  - getPartitionService
```
PartitionService getPartitionService()
```
    Returns the partition service of this Hazelcast instance. InternalPartitionService allows you to introspect current partitions in the cluster, partition the owner members, and listen for partition migration events.
    
    Returns:
    the partition service of this Hazelcast instance
  - getClientService
```
ClientService getClientService()
```
    Returns the client service of this Hazelcast instance. Client service allows you to get information about connected clients.
    
    Returns:
    the ClientService of this Hazelcast instance.
  - getLoggingService
```
LoggingService getLoggingService()
```
    Returns the logging service of this Hazelcast instance. LoggingService allows you to listen for LogEvents generated by Hazelcast runtime. You can log the events somewhere or take action based on the message.
    
    Returns:
    the logging service of this Hazelcast instance
  - getLifecycleService
```
LifecycleService getLifecycleService()
```
    Returns the lifecycle service for this instance. LifecycleService allows you to shutdown this HazelcastInstance and listen for the lifecycle events.
    
    Returns:
    the lifecycle service for this instance
  - getDistributedObject
```
@Deprecated
<T extends DistributedObject> T getDistributedObject(String serviceName,
                                                              Object id)
```
    Deprecated. use getDistributedObject(String, String) instead.
    
    Type Parameters:
    T - type of the DistributedObject
    Parameters:
    serviceName - name of the service
    id - identifier of the object
    
    Returns:
    DistributedObject created by the service
  - getDistributedObject
```
<T extends DistributedObject> T getDistributedObject(String serviceName,
                                                   String name)
```
    Type Parameters:
    T - type of the DistributedObject
    Parameters:
    serviceName - name of the service
    name - name of the object
    
    Returns:
    DistributedObject created by the service
  - getUserContext
```
ConcurrentMap<String,Object> getUserContext()
```
    Returns a ConcurrentMap that can be used to add user-context to the HazelcastInstance. This can be used to store dependencies that otherwise are hard to obtain. HazelcastInstance can be obtained by implementing a HazelcastInstanceAware interface when submitting a Runnable/Callable to Hazelcast ExecutorService. By storing the dependencies in the user-context, they can be retrieved as soon as you have a reference to the HazelcastInstance.
    This structure is purely local and Hazelcast remains agnostic abouts its content.
    
    Returns:
    a ConcurrentMap that can be used to add user-context to the HazelcastInstance.
  - shutdown
```
void shutdown()
```
    Shuts down this HazelcastInstance. For more information see LifecycleService.shutdown().

Interface HazelcastInstance

Method Summary

Method Detail

getName

getQueue

getTopic

getSet

getList

getMap

getReplicatedMap

getJobTracker

getMultiMap

getLock

getLock

getCluster

getLocalEndpoint

getExecutorService

executeTransaction

executeTransaction

newTransactionContext

newTransactionContext

getIdGenerator

getAtomicLong

getAtomicReference

getCountDownLatch

getSemaphore

getDistributedObjects

addDistributedObjectListener

removeDistributedObjectListener

getConfig

getPartitionService

getClientService

getLoggingService

getLifecycleService

getDistributedObject

getDistributedObject

getUserContext

shutdown