com.atlassian.confluence.cluster.nonclustered
Class NonClusterManager

java.lang.Object
  extended by com.atlassian.confluence.cluster.nonclustered.NonClusterManager
All Implemented Interfaces:
com.atlassian.beehive.ClusterLockService, ClusterManager, NameResolver, LockFactory

@Internal
public final class NonClusterManager
extends Object
implements ClusterManager, com.atlassian.beehive.ClusterLockService

An implementation of ClusterManager for use when no clustering is configured. It provides sensible default implementation of some methods where appropriate, emulating a "single node cluster".


Constructor Summary
NonClusterManager(com.atlassian.config.ApplicationConfig applicationConfig)
           
 
Method Summary
 void configure(ClusterConfig config)
          Set a new cluster configuration.
 Collection<ClusterNodeInformation> getAllNodesInformation()
           
 ClusteredLock getClusteredLock(String key)
          Get a distributed lock -- getting the lock does *not* imply that it has been acquired.
 ClusterInformation getClusterInformation()
          Get information about the running cluster.
 ClusterInvariants getClusterInvariants()
          Get all attributes of the server that must be consistent between cluster nodes.
<T> com.atlassian.core.task.FifoBuffer<T>
getFifoBuffer(String name)
          Get a distributed FIFO buffer
 Lock getLock(String name)
          Get a lock -- getting the lock does *not* imply that it has been acquired.
 com.atlassian.confluence.cluster.nonclustered.JvmDualLock getLockForName(String key)
           
 Map<Integer,NodeStatus> getNodeStatuses()
          Gets status information from all members of the cluster.
 Map<ClusterNodeInformation,NodeStatus> getNodeStatusMap()
          Gets status information from all members of the cluster.
 int getPermittedClusterNodes()
           
 Serializable getPublishedObject(String key)
          Retrieve an object which another node in the cluster has shared, return null if no such object exists
 ClusterNodeInformation getThisNodeInformation()
           Get the identity of this node in the cluster.
 void init()
           
 boolean isClustered()
           
 boolean isClusterSupported()
          Check whether this Confluence distribution is capable of running in a cluster.
 boolean isConfigured()
           
 void publishEvent(ConfluenceEvent event)
          Publish an event as a ClusterEventWrapper to other nodes
 void publishObject(String key, Serializable object)
          Publish the supplied object to the local Map maintained by this manager.
 void reconfigure(ClusterConfig config)
          Set a new cluster configuration and cycle the service
 InetAddress resolveName(String name)
           
 void shutdown()
           
 void startCluster()
          Start the clustering service
 void stopCluster()
          Stop the clustering service
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NonClusterManager

public NonClusterManager(com.atlassian.config.ApplicationConfig applicationConfig)
Method Detail

init

public void init()

shutdown

public void shutdown()

configure

public void configure(ClusterConfig config)
Description copied from interface: ClusterManager
Set a new cluster configuration.

Specified by:
configure in interface ClusterManager

getClusterInformation

public ClusterInformation getClusterInformation()
Description copied from interface: ClusterManager
Get information about the running cluster.

Specified by:
getClusterInformation in interface ClusterManager

getFifoBuffer

public <T> com.atlassian.core.task.FifoBuffer<T> getFifoBuffer(String name)
Description copied from interface: ClusterManager
Get a distributed FIFO buffer

Specified by:
getFifoBuffer in interface ClusterManager

getPermittedClusterNodes

public int getPermittedClusterNodes()
Specified by:
getPermittedClusterNodes in interface ClusterManager
Returns:
if licensed for clustering, then returns Integer.MAX_VALUE, otherwise returns 0.

getPublishedObject

public Serializable getPublishedObject(String key)
Description copied from interface: ClusterManager
Retrieve an object which another node in the cluster has shared, return null if no such object exists

Specified by:
getPublishedObject in interface ClusterManager
Returns:
a shared Object

getThisNodeInformation

public ClusterNodeInformation getThisNodeInformation()
Description copied from interface: ClusterManager

Get the identity of this node in the cluster. ClusterNodeInformation implements equals().

Specified by:
getThisNodeInformation in interface ClusterManager
Returns:
the identity of this node in the cluster. May return null if the node is not in a cluster.

getAllNodesInformation

public Collection<ClusterNodeInformation> getAllNodesInformation()
Specified by:
getAllNodesInformation in interface ClusterManager

isClustered

public boolean isClustered()
Specified by:
isClustered in interface ClusterManager
Returns:
true if this instance is configured to allow clustering with other nodes. Note, this does not mean this instance is licensed to cluster.

isConfigured

public boolean isConfigured()
Specified by:
isConfigured in interface ClusterManager
Returns:
true if ClusterManager.configure(ClusterConfig) has been called with a valid configuration, otherwise false.

publishEvent

public void publishEvent(ConfluenceEvent event)
Description copied from interface: ClusterManager
Publish an event as a ClusterEventWrapper to other nodes

Specified by:
publishEvent in interface ClusterManager

isClusterSupported

public boolean isClusterSupported()
Description copied from interface: ClusterManager
Check whether this Confluence distribution is capable of running in a cluster. This differs from ClusterManager.isClustered() in that it will return true if the code to support clustering is present, even if this instance does not have a clustered license or a current clustering configuration.

Specified by:
isClusterSupported in interface ClusterManager
Returns:
true if this Confluence installation is capable of running in a cluster

publishObject

public void publishObject(String key,
                          Serializable object)
Publish the supplied object to the local Map maintained by this manager.

Specified by:
publishObject in interface ClusterManager

reconfigure

public void reconfigure(ClusterConfig config)
Description copied from interface: ClusterManager
Set a new cluster configuration and cycle the service

Specified by:
reconfigure in interface ClusterManager

startCluster

public void startCluster()
Description copied from interface: ClusterManager
Start the clustering service

Specified by:
startCluster in interface ClusterManager

stopCluster

public void stopCluster()
Description copied from interface: ClusterManager
Stop the clustering service

Specified by:
stopCluster in interface ClusterManager

resolveName

public InetAddress resolveName(String name)
Specified by:
resolveName in interface NameResolver

getNodeStatuses

public Map<Integer,NodeStatus> getNodeStatuses()
Description copied from interface: ClusterManager
Gets status information from all members of the cluster.

Specified by:
getNodeStatuses in interface ClusterManager
Returns:
a map of node IDs to node statuses

getNodeStatusMap

public Map<ClusterNodeInformation,NodeStatus> getNodeStatusMap()
Description copied from interface: ClusterManager
Gets status information from all members of the cluster.

Specified by:
getNodeStatusMap in interface ClusterManager

getClusterInvariants

public ClusterInvariants getClusterInvariants()
Description copied from interface: ClusterManager
Get all attributes of the server that must be consistent between cluster nodes. They are to be retrieved from another member in the cluster. If there are no other members currently active in the cluster, then return null.

Specified by:
getClusterInvariants in interface ClusterManager
Returns:
the cluster invariants of this server

getLockForName

public com.atlassian.confluence.cluster.nonclustered.JvmDualLock getLockForName(@Nonnull
                                                                                String key)
Specified by:
getLockForName in interface com.atlassian.beehive.ClusterLockService

getClusteredLock

public ClusteredLock getClusteredLock(String key)
Description copied from interface: ClusterManager
Get a distributed lock -- getting the lock does *not* imply that it has been acquired. Call Lock.tryLock() or Lock.lock() on the returned object to acquire the lock.

Specified by:
getClusteredLock in interface ClusterManager

getLock

public Lock getLock(String name)
Description copied from interface: LockFactory
Get a lock -- getting the lock does *not* imply that it has been acquired. Call Lock.tryLock() or Lock.lock() on the returned object to acquire the lock.

Specified by:
getLock in interface LockFactory


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