Package org.apache.ignite.internal.client.impl

Class GridClientClusterStateImpl

java.lang.Object

org.apache.ignite.internal.client.impl.GridClientClusterStateImpl

All Implemented Interfaces:

GridClientClusterState

public class GridClientClusterStateImpl
extends Object
implements GridClientClusterState

Field Summary

Fields

Modifier and Type	Field	Description
protected GridClientLoadBalancer	balancer	Balancer to be used in this projection.
protected GridClientImpl	client	Client instance.
protected GridClientPredicate<? super GridClientNode>	filter	Node filter to be applied for this projection.
protected Collection<GridClientNode>	nodes	List of nodes included in this projection.

Constructor Summary

Constructors

Constructor	Description
GridClientClusterStateImpl(GridClientImpl client, Collection<GridClientNode> nodes, GridClientPredicate<? super GridClientNode> filter, GridClientLoadBalancer balancer)	Creates projection with specified client.

Method Summary

Modifier and Type	Method	Description
protected boolean	checkNodeAlive(UUID nodeId)	Tries to refresh node on every possible connection in topology.
String	clusterName()	Get the cluster name.
protected T	createProjection(@Nullable Collection<GridClientNode> nodes, @Nullable GridClientPredicate<? super GridClientNode> filter, @Nullable GridClientLoadBalancer balancer, org.apache.ignite.internal.client.impl.GridClientAbstractProjection.ProjectionFactory<T> factory)	Creates a sub-projection for current projection.
UUID	id()	Unique identifier of cluster STATE command was sent to.
Collection<? extends GridClientNode>	projectionNodes()	Gets most recently refreshed topology.
protected Collection<? extends GridClientNode>	projectionNodes(@Nullable GridClientPredicate<GridClientNode> pred)	Gets most recently refreshed topology.
ClusterState	state()
void	state(ClusterState newState, boolean forceDeactivation)	Changes cluster state to newState.
String	tag()	User-defined tag of cluster STATE command was sent to.
protected <R> GridClientFuture<R>	withReconnectHandling(org.apache.ignite.internal.client.impl.GridClientAbstractProjection.ClientProjectionClosure<R> c)	This method executes request to a communication layer and handles connection error, if it occurs.
protected <R> GridClientFuture<R>	withReconnectHandling(org.apache.ignite.internal.client.impl.GridClientAbstractProjection.ClientProjectionClosure<R> c, String cacheName, @Nullable Object affKey)	This method executes request to a communication layer and handles connection error, if it occurs.

Methods inherited from class java.lang.Object

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

Field Detail

nodes

protected Collection<GridClientNode> nodes

List of nodes included in this projection. If null, all nodes in topology are included.

filter

protected GridClientPredicate<? super GridClientNode> filter

Node filter to be applied for this projection.

balancer

protected GridClientLoadBalancer balancer

Balancer to be used in this projection.

client

protected GridClientImpl client

Client instance.

Constructor Detail

GridClientClusterStateImpl

public GridClientClusterStateImpl(GridClientImpl client,
                                  Collection<GridClientNode> nodes,
                                  GridClientPredicate<? super GridClientNode> filter,
                                  GridClientLoadBalancer balancer)

Creates projection with specified client.

Parameters:

client - Client instance to use.

nodes - Collections of nodes included in this projection.

filter - Node filter to be applied.

balancer - Balancer to use.

Method Detail

state

public ClusterState state()
                   throws GridClientException

Specified by:

state in interface GridClientClusterState

Returns:

Current cluster state.

Throws:

GridClientException - If the request to get the cluster state failed.

state

public void state(ClusterState newState,
                  boolean forceDeactivation)
           throws GridClientException

Changes cluster state to newState.

Specified by:

state in interface GridClientClusterState

Parameters:

newState - New cluster state.

forceDeactivation - If true, cluster deactivation will be forced.

Throws:

GridClientException - If the request to change the cluster state failed.

See Also:

ClusterState.INACTIVE

id

public UUID id()
        throws Exception

Unique identifier of cluster STATE command was sent to.

Specified by:

id in interface GridClientClusterState

Returns:

ID of the cluster.

Throws:

Exception

tag

public String tag()
           throws Exception

User-defined tag of cluster STATE command was sent to.

Specified by:

tag in interface GridClientClusterState

Returns:

Tag of the cluster.

Throws:

Exception

clusterName

public String clusterName()
                   throws GridClientException

Get the cluster name.

Specified by:

clusterName in interface GridClientClusterState

Returns:

The name of the cluster.

Throws:

GridClientException - If the request to get the cluster name failed.

withReconnectHandling

protected <R> GridClientFuture<R> withReconnectHandling(org.apache.ignite.internal.client.impl.GridClientAbstractProjection.ClientProjectionClosure<R> c)

This method executes request to a communication layer and handles connection error, if it occurs. In case of communication exception client instance is notified and new instance of client is created. If none of the grid servers can be reached, an exception is thrown.

Type Parameters:

R - Result future type.

Parameters:

c - Closure to be executed.

Returns:

Future returned by closure.

withReconnectHandling

protected <R> GridClientFuture<R> withReconnectHandling(org.apache.ignite.internal.client.impl.GridClientAbstractProjection.ClientProjectionClosure<R> c,
                                                        String cacheName,
                                                        @Nullable
                                                        @Nullable Object affKey)

This method executes request to a communication layer and handles connection error, if it occurs. Server is picked up according to the projection affinity and key given. Connection will be made with the node on which key is cached. In case of communication exception client instance is notified and new instance of client is created. If none of servers can be reached, an exception is thrown.

Type Parameters:

R - Type of result in future.

Parameters:

c - Closure to be executed.

cacheName - Cache name for which mapped node will be calculated.

affKey - Affinity key.

Returns:

Operation future.

checkNodeAlive

protected boolean checkNodeAlive(UUID nodeId)
                          throws GridClientException,
                                 InterruptedException

Tries to refresh node on every possible connection in topology.

Parameters:

nodeId - Node id to check.

Returns:

True if response was received, false if either null response received or no nodes can be contacted at all.

Throws:

GridClientException - If failed to refresh topology or if client was closed manually.

InterruptedException - If interrupted.

projectionNodes

public Collection<? extends GridClientNode> projectionNodes()
                                                     throws GridClientException

Gets most recently refreshed topology. If this compute instance is a projection, then only nodes that satisfy projection criteria will be returned.

Returns:

Most recently refreshed topology.

Throws:

GridClientException - If failed to refresh topology.

projectionNodes

protected Collection<? extends GridClientNode> projectionNodes(@Nullable
                                                               @Nullable GridClientPredicate<GridClientNode> pred)
                                                        throws GridClientException

Gets most recently refreshed topology. If this compute instance is a projection, then only nodes that satisfy projection criteria will be returned.

Parameters:

pred - Predicate to additionally filter projection nodes, if null just return projection.

Returns:

Most recently refreshed topology.

Throws:

GridClientException - If failed to refresh topology.

createProjection

protected T createProjection(@Nullable
                             @Nullable Collection<GridClientNode> nodes,
                             @Nullable
                             @Nullable GridClientPredicate<? super GridClientNode> filter,
                             @Nullable
                             @Nullable GridClientLoadBalancer balancer,
                             org.apache.ignite.internal.client.impl.GridClientAbstractProjection.ProjectionFactory<T> factory)
                      throws GridClientException

Creates a sub-projection for current projection.

Parameters:

nodes - Collection of nodes that sub-projection will be restricted to. If null, created projection is dynamic and will take nodes from topology.

filter - Filter to be applied to nodes in projection. If null - no filter applied.

balancer - Balancer to use in projection. If null - inherit balancer from the current projection.

factory - Factory to create new projection.

Returns:

Created projection.

Throws:

GridClientException - If resulting projection is empty. Note that this exception may only be thrown on case of static projections, i.e. where collection of nodes is not null.