org.gridgain.client.impl

Class GridClientImpl

java.lang.Object

org.gridgain.client.impl.GridClientImpl

All Implemented Interfaces:

AutoCloseable, GridClient

public class GridClientImpl
extends Object
implements GridClient

Client implementation.

Field Summary

Fields

Modifier and Type	Field and Description
protected GridClientConfiguration	cfg Client configuration.
protected GridClientConnectionManager	connMgr Connection manager.
protected GridClientTopology	top Topology.

Constructor Summary

Constructors

Constructor and Description
GridClientImpl(UUID id, GridClientConfiguration cfg0) Creates a new client based on a given configuration.

Method Summary

Methods

Modifier and Type	Method and Description
void	addTopologyListener(GridClientTopologyListener lsnr) Adds topology listener.
void	close() Closes client instance.
GridClientCompute	compute() Gets a default compute projection.
boolean	connected() Indicates whether client is connected to remote Grid.
GridClientConnectionManager	connectionManager()
GridClientData	data() Gets a data projection for a default grid cache with null name.
GridClientData	data(String cacheName) Gets a data projection for grid cache with name cacheName.
UUID	id() Gets a unique client identifier.
GridClientConnectionManager	newConnectionManager(Byte protoId)
void	removeTopologyListener(GridClientTopologyListener lsnr) Removes previously added topology listener.
void	stop(boolean waitCompletion) Closes client.
GridClientTopology	topology() Gets topology instance.
Collection<GridClientTopologyListener>	topologyListeners() Gets an unmodifiable snapshot of topology listeners list.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

cfg

protected final GridClientConfiguration cfg

Client configuration.

top

protected GridClientTopology top

Topology.

connMgr

protected GridClientConnectionManager connMgr

Connection manager.

Constructor Detail

GridClientImpl

public GridClientImpl(UUID id,
              GridClientConfiguration cfg0)
               throws GridClientException

Creates a new client based on a given configuration.

Parameters:

id - Client identifier.

cfg0 - Client configuration.

Throws:

GridClientException - If client configuration is incorrect.

GridServerUnreachableException - If none of the servers specified in configuration can be reached.

Method Detail

id

public UUID id()

Gets a unique client identifier. This identifier is generated by factory on client creation and used in identification and authentication procedure on server node.

Specified by:

id in interface GridClient

Returns:

Generated client id.

stop

public void stop(boolean waitCompletion)

Closes client.

Parameters:

waitCompletion - If true will wait for all pending requests to be proceeded.

data

public GridClientData data()
                    throws GridClientException

Gets a data projection for a default grid cache with null name.

Specified by:

data in interface GridClient

Returns:

Data projection for grid cache with null name.

Throws:

GridClientException - If client was closed.

data

public GridClientData data(@Nullable
                  String cacheName)
                    throws GridClientException

Gets a data projection for grid cache with name cacheName. If no data configuration with given name was provided at client startup, an exception will be thrown.

Specified by:

data in interface GridClient

Parameters:

cacheName - Grid cache name for which data projection should be obtained.

Returns:

Data projection for grid cache with name cacheName.

Throws:

GridClientException - If client was closed or no configuration with given name was provided.

compute

public GridClientCompute compute()

Gets a default compute projection. Default compute projection will include all nodes in remote grid. Selection of node that will be connected to perform operations will be done according to GridClientLoadBalancer provided in client configuration or according to affinity if projection call involves affinity key.

More restricted projection configurations may be created with GridClientCompute methods.

Specified by:

compute in interface GridClient

Returns:

Default compute projection.

See Also:

GridClientCompute

addTopologyListener

public void addTopologyListener(GridClientTopologyListener lsnr)

Adds topology listener. Remote grid topology is refreshed every GridClientConfiguration.getTopologyRefreshFrequency() milliseconds. If any node was added or removed, a listener will be notified.

Specified by:

addTopologyListener in interface GridClient

Parameters:

lsnr - Listener to add.

removeTopologyListener

public void removeTopologyListener(GridClientTopologyListener lsnr)

Removes previously added topology listener.

Specified by:

removeTopologyListener in interface GridClient

Parameters:

lsnr - Listener to remove.

topologyListeners

public Collection<GridClientTopologyListener> topologyListeners()

Gets an unmodifiable snapshot of topology listeners list.

Specified by:

topologyListeners in interface GridClient

Returns:

List of topology listeners.

connected

public boolean connected()

Indicates whether client is connected to remote Grid. In other words it allow to determine if client is able to communicate with Grid right now. If it can't all methods on Compute and Data projections throw GridClientDisconnectedException.

Connection status is updated in background together with topology update. See GridClientConfiguration.getTopologyRefreshFrequency() for more details on how background topology update works.

Note that due to asynchronous nature of topology update and connectivity detection this method gives no guarantees for subsequent calls for projections methods. It can be used only fo diagnostic and monitoring purposes.

Specified by:

connected in interface GridClient

Returns:

Whether client is connected to remote Grid.

close

public void close()

Closes client instance. This method is identical to GridClientFactory.stop(clientId).

The method is invoked automatically on objects managed by the try-with-resources statement.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface GridClient

topology

public GridClientTopology topology()

Gets topology instance.

Returns:

Topology instance.

connectionManager

public GridClientConnectionManager connectionManager()

Returns:

Connection manager.

newConnectionManager

public GridClientConnectionManager newConnectionManager(Byte protoId)
                                                 throws GridClientException

Parameters:

protoId - Protocol ID to use in this connection manager.

Returns:

New connection manager based on current client settings.

Throws:

GridClientException - If failed to start connection server.

toString

public String toString()

Overrides:

toString in class Object