org.neo4j.kernel
Class HAGraphDb

java.lang.Object
  org.neo4j.kernel.AbstractGraphDatabase
      org.neo4j.kernel.HAGraphDb

All Implemented Interfaces:

Client.ConnectionLostHandler, GraphDatabaseService, ResponseReceiver

public class HAGraphDb
extends AbstractGraphDatabase
implements GraphDatabaseService, ResponseReceiver

Field Summary

Fields inherited from interface org.neo4j.com.Client.ConnectionLostHandler

NO_ACTION

Constructor Summary

HAGraphDb(String storeDir, Map<String,String> config)
Will instantiate its own ZooKeeper broker and ClusterClient

HAGraphDb(String storeDir, Map<String,String> config, BrokerFactory brokerFactory)
ONLY FOR TESTING Will instantiate its own ClusterClient

HAGraphDb(String storeDir, Map<String,String> config, BrokerFactory brokerFactory, ClusterClient clusterManager)
ONLY FOR TESTING

Method Summary

Transaction	beginTx() Starts a new transaction and associates it with the current thread.
Node	createNode() Creates a new node.
Iterable<Node>	getAllNodes() Returns all nodes in the node space.
Broker	getBroker()
Config	getConfig()
<T> Collection<T>	getManagementBeans(Class<T> type)
MasterServer	getMasterServerIfMaster()
Node	getNodeById(long id) Looks up a node by id.
Node	getReferenceNode() Returns the reference node, which is a "starting point" in the node space.
Relationship	getRelationshipById(long id) Looks up a relationship by id.
Iterable<RelationshipType>	getRelationshipTypes() Returns all relationship types currently in the underlying store.
SlaveContext	getSlaveContext(int eventIdentifier)
String	getStoreDir()
void	handle(Exception e)
IndexManager	index() Returns the IndexManager paired with this graph database service and is the entry point for managing indexes coupled with this database.
void	internalShutdown(boolean rotateLogs)
boolean	isMaster()
boolean	isReadOnly()
void	newMaster(Exception e)
void	pullUpdates()
<T> T	receive(Response<T> response)
void	reconnect(Exception e) Shuts down the broker, invalidating every connection to the zookeeper cluster and starts it again.
protected void	reevaluateMyself(org.neo4j.kernel.impl.nioneo.store.StoreId storeId)
KernelEventHandler	registerKernelEventHandler(KernelEventHandler handler) Registers handler as a handler for kernel events which are generated from different places in the lifecycle of the kernel.
<T> TransactionEventHandler<T>	registerTransactionEventHandler(TransactionEventHandler<T> handler) Registers handler as a handler for transaction events which are generated from different places in the lifecycle of each transaction.
void	shutdown() Shuts down Neo4j.
void	shutdownBroker()
String	toString()
KernelEventHandler	unregisterKernelEventHandler(KernelEventHandler handler) Unregisters handler from the list of kernel event handlers.
<T> TransactionEventHandler<T>	unregisterTransactionEventHandler(TransactionEventHandler<T> handler) Unregisters handler from the list of transaction event handlers.

Methods inherited from class org.neo4j.kernel.AbstractGraphDatabase

getManagementBean, getSingleManagementBean

Methods inherited from class java.lang.Object

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

Constructor Detail

HAGraphDb

public HAGraphDb(String storeDir,
                 Map<String,String> config)

Will instantiate its own ZooKeeper broker and ClusterClient

HAGraphDb

public HAGraphDb(String storeDir,
                 Map<String,String> config,
                 BrokerFactory brokerFactory)

ONLY FOR TESTING Will instantiate its own ClusterClient

HAGraphDb

public HAGraphDb(String storeDir,
                 Map<String,String> config,
                 BrokerFactory brokerFactory,
                 ClusterClient clusterManager)

ONLY FOR TESTING

Method Detail

getBroker

public Broker getBroker()

pullUpdates

public void pullUpdates()

getConfig

public Config getConfig()

Specified by:

getConfig in class AbstractGraphDatabase

getStoreDir

public String getStoreDir()

Specified by:

getStoreDir in class AbstractGraphDatabase

getManagementBeans

public <T> Collection<T> getManagementBeans(Class<T> type)

Specified by:

getManagementBeans in class AbstractGraphDatabase

toString

public String toString()

Overrides:

toString in class AbstractGraphDatabase

reconnect

public void reconnect(Exception e)

Shuts down the broker, invalidating every connection to the zookeeper cluster and starts it again. Should be called in case a ConnectionExpired event is received, this is the equivalent of building the ZK connection from start. Also triggers a master reelect, to make sure that the state ZK ended up in during our absence is respected. The cluster manager is not used outside of startup where this call should not happen and also it doesn't keep a zoo client open - so is no reason to recreate it

Specified by:

reconnect in interface ResponseReceiver

reevaluateMyself

protected void reevaluateMyself(org.neo4j.kernel.impl.nioneo.store.StoreId storeId)

beginTx

public Transaction beginTx()

Description copied from interface: GraphDatabaseService

Starts a new transaction and associates it with the current thread.

Specified by:

beginTx in interface GraphDatabaseService

Returns:

a new transaction instance

createNode

public Node createNode()

Description copied from interface: GraphDatabaseService

Creates a new node.

Specified by:

createNode in interface GraphDatabaseService

Returns:

the created node.

getAllNodes

public Iterable<Node> getAllNodes()

Description copied from interface: GraphDatabaseService

Returns all nodes in the node space.

Specified by:

getAllNodes in interface GraphDatabaseService

Returns:

all nodes in the node space

getNodeById

public Node getNodeById(long id)

Description copied from interface: GraphDatabaseService

Looks up a node by id.

Specified by:

getNodeById in interface GraphDatabaseService

Parameters:

id - the id of the node

Returns:

the node with id id if found

getReferenceNode

public Node getReferenceNode()

Description copied from interface: GraphDatabaseService

Returns the reference node, which is a "starting point" in the node space. Usually, a client attaches relationships to this node that leads into various parts of the node space. For more information about common node space organizational patterns, see the design guide at wiki.neo4j.org/content/Design_Guide.

Specified by:

getReferenceNode in interface GraphDatabaseService

Returns:

the reference node

getRelationshipById

public Relationship getRelationshipById(long id)

Description copied from interface: GraphDatabaseService

Looks up a relationship by id.

Specified by:

getRelationshipById in interface GraphDatabaseService

Parameters:

id - the id of the relationship

Returns:

the relationship with id id if found

getRelationshipTypes

public Iterable<RelationshipType> getRelationshipTypes()

Description copied from interface: GraphDatabaseService

Returns all relationship types currently in the underlying store. Relationship types are added to the underlying store the first time they are used in a successfully commited node.createRelationshipTo(...). Note that this method is guaranteed to return all known relationship types, but it does not guarantee that it won't return more than that (e.g. it can return "historic" relationship types that no longer have any relationships in the node space).

Specified by:

getRelationshipTypes in interface GraphDatabaseService

Returns:

all relationship types in the underlying store

registerKernelEventHandler

public KernelEventHandler registerKernelEventHandler(KernelEventHandler handler)

Description copied from interface: GraphDatabaseService

Registers handler as a handler for kernel events which are generated from different places in the lifecycle of the kernel. To guarantee proper behaviour the handler should be registered right after the graph database has been started. If the specified handler instance has already been registered this method will do nothing.

Specified by:

registerKernelEventHandler in interface GraphDatabaseService

Parameters:

handler - the handler to receive events about different states in the kernel lifecycle.

Returns:

the handler passed in as the argument.

registerTransactionEventHandler

public <T> TransactionEventHandler<T> registerTransactionEventHandler(TransactionEventHandler<T> handler)

Description copied from interface: GraphDatabaseService

Registers handler as a handler for transaction events which are generated from different places in the lifecycle of each transaction. To guarantee that the handler gets all events properly it shouldn't be registered when the application is running (i.e. in the middle of one or more transactions). If the specified handler instance has already been registered this method will do nothing.

Specified by:

registerTransactionEventHandler in interface GraphDatabaseService

Type Parameters:

T - the type of state object used in the handler, see more documentation about it at TransactionEventHandler.

Parameters:

handler - the handler to receive events about different states in transaction lifecycles.

Returns:

the handler passed in as the argument.

internalShutdown

public void internalShutdown(boolean rotateLogs)

shutdown

public void shutdown()

Description copied from interface: GraphDatabaseService

Shuts down Neo4j. After this method has been invoked, it's invalid to invoke any methods in the Neo4j API and all references to this instance of GraphDatabaseService should be discarded.

Specified by:

shutdown in interface GraphDatabaseService

unregisterKernelEventHandler

public KernelEventHandler unregisterKernelEventHandler(KernelEventHandler handler)

Description copied from interface: GraphDatabaseService

Unregisters handler from the list of kernel event handlers. If handler hasn't been registered with GraphDatabaseService.registerKernelEventHandler(KernelEventHandler) prior to calling this method an IllegalStateException will be thrown. After a successful call to this method the handler will no longer receive any kernel events.

Specified by:

unregisterKernelEventHandler in interface GraphDatabaseService

Parameters:

handler - the handler to receive events about different states in the kernel lifecycle.

Returns:

the handler passed in as the argument.

unregisterTransactionEventHandler

public <T> TransactionEventHandler<T> unregisterTransactionEventHandler(TransactionEventHandler<T> handler)

Description copied from interface: GraphDatabaseService

Unregisters handler from the list of transaction event handlers. If handler hasn't been registered with GraphDatabaseService.registerTransactionEventHandler(TransactionEventHandler) prior to calling this method an IllegalStateException will be thrown. After a successful call to this method the handler will no longer receive any transaction events.

Specified by:

unregisterTransactionEventHandler in interface GraphDatabaseService

Type Parameters:

T - the type of state object used in the handler, see more documentation about it at TransactionEventHandler.

Parameters:

handler - the handler to receive events about different states in transaction lifecycles.

Returns:

the handler passed in as the argument.

getSlaveContext

public SlaveContext getSlaveContext(int eventIdentifier)

Specified by:

getSlaveContext in interface ResponseReceiver

receive

public <T> T receive(Response<T> response)

Specified by:

receive in interface ResponseReceiver

handle

public void handle(Exception e)

Specified by:

handle in interface Client.ConnectionLostHandler

newMaster

public void newMaster(Exception e)

Specified by:

newMaster in interface ResponseReceiver

getMasterServerIfMaster

public MasterServer getMasterServerIfMaster()

isMaster

public boolean isMaster()

isReadOnly

public boolean isReadOnly()

Specified by:

isReadOnly in class AbstractGraphDatabase

index

public IndexManager index()

Description copied from interface: GraphDatabaseService

Returns the IndexManager paired with this graph database service and is the entry point for managing indexes coupled with this database.

Specified by:

index in interface GraphDatabaseService

Returns:

the IndexManager for this database.

shutdownBroker

public void shutdownBroker()