com.couchbase.client.core

Class RequestHandler

java.lang.Object

com.couchbase.client.core.RequestHandler

All Implemented Interfaces:

com.lmax.disruptor.EventHandler<RequestEvent>

public class RequestHandler
extends java.lang.Object
implements com.lmax.disruptor.EventHandler<RequestEvent>

The RequestHandler handles the overall concept of Nodes and manages them concurrently.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
RequestHandler(CoreEnvironment environment, rx.Observable<ClusterConfig> configObservable, com.lmax.disruptor.RingBuffer<ResponseEvent> responseBuffer) Create a new RequestHandler.

Method Summary

Methods

Modifier and Type	Method and Description
rx.Observable<LifecycleState>	addNode(java.net.InetAddress hostname) Add a Node identified by its hostname.
rx.Observable<Service>	addService(AddServiceRequest request) Add the service to the node.
protected Locator	locator(CouchbaseRequest request) Helper method to detect the correct locator for the given request type.
Node	nodeBy(java.net.InetAddress hostname) Returns the node by its hostname.
void	onEvent(RequestEvent event, long sequence, boolean endOfBatch)
rx.Observable<ClusterConfig>	reconfigure(ClusterConfig config) Helper method which grabs the current configuration and checks if the node setup is out of sync.
rx.Observable<LifecycleState>	removeNode(java.net.InetAddress hostname) Remove a Node identified by its hostname.
rx.Observable<Service>	removeService(RemoveServiceRequest request) Remove a service from a node.

Methods inherited from class java.lang.Object

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

Constructor Detail

RequestHandler

public RequestHandler(CoreEnvironment environment,
              rx.Observable<ClusterConfig> configObservable,
              com.lmax.disruptor.RingBuffer<ResponseEvent> responseBuffer)

Create a new RequestHandler.

Method Detail

onEvent

public void onEvent(RequestEvent event,
           long sequence,
           boolean endOfBatch)
             throws java.lang.Exception

Specified by:

onEvent in interface com.lmax.disruptor.EventHandler<RequestEvent>

Throws:

java.lang.Exception

addNode

public rx.Observable<LifecycleState> addNode(java.net.InetAddress hostname)

Add a Node identified by its hostname.

Parameters:

hostname - the hostname of the node.

Returns:

the states of the node (most probably LifecycleState.CONNECTED).

removeNode

public rx.Observable<LifecycleState> removeNode(java.net.InetAddress hostname)

Remove a Node identified by its hostname.

Parameters:

hostname - the hostname of the node.

Returns:

the states of the node (most probably LifecycleState.DISCONNECTED).

addService

public rx.Observable<Service> addService(AddServiceRequest request)

Add the service to the node.

Parameters:

request - the request which contains infos about the service and node to add.

Returns:

an observable which contains the newly created service.

removeService

public rx.Observable<Service> removeService(RemoveServiceRequest request)

Remove a service from a node.

Parameters:

request - the request which contains infos about the service and node to remove.

Returns:

an observable which contains the removed service.

nodeBy

public Node nodeBy(java.net.InetAddress hostname)

Returns the node by its hostname.

Parameters:

hostname - the hostname of the node.

Returns:

the node or null if no hostname for that ip address.

locator

protected Locator locator(CouchbaseRequest request)

Helper method to detect the correct locator for the given request type.

Returns:

the locator for the given request type.

reconfigure

public rx.Observable<ClusterConfig> reconfigure(ClusterConfig config)

Helper method which grabs the current configuration and checks if the node setup is out of sync.

This method is always called when a new configuration arrives and it will try to sync the actual node and service setup with the one proposed by the configuration.