com.netflix.loadbalancer.reactive

Class LoadBalancerObservableCommand<T>

java.lang.Object

com.netflix.loadbalancer.reactive.LoadBalancerRetrySameServerCommand<T>

com.netflix.loadbalancer.reactive.LoadBalancerObservableCommand<T>

All Implemented Interfaces:

LoadBalancerObservable<T>, rx.functions.Func1<Server,rx.Observable<T>>, rx.functions.Function

public abstract class LoadBalancerObservableCommand<T>
extends LoadBalancerRetrySameServerCommand<T>
implements LoadBalancerObservable<T>

A command that is used to produce the Observable from the load balancer execution. The load balancer is responsible for the following:

• Choose a server
• Invoke the LoadBalancerObservable.call(com.netflix.loadbalancer.Server) method
• Invoke the ExecutionListener if any
• Retry on exception, controlled by RetryHandler
• Provide feedback to the LoadBalancerStats

Field Summary

Fields inherited from class com.netflix.loadbalancer.reactive.LoadBalancerRetrySameServerCommand

executionInfo, listenerInvoker, loadBalancerContext

Constructor Summary

Constructors

Constructor and Description
LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext)
LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext, com.netflix.client.RetryHandler retryHandler)
LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext, com.netflix.client.RetryHandler retryHandler, ExecutionContextListenerInvoker<?,T> listenerInvoker)
LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext, com.netflix.client.RetryHandler retryHandler, java.net.URI loadBalancerURI, java.lang.Object loadBalancerKey, ExecutionContextListenerInvoker<?,T> listenerInvoker)

Method Summary

Methods

Modifier and Type	Method and Description
rx.Observable<T>	toObservable() Create an Observable that once subscribed execute network call asynchronously with a server chosen by load balancer.

Methods inherited from class com.netflix.loadbalancer.reactive.LoadBalancerRetrySameServerCommand

getRetryHandler, retryWithSameServer, retryWithSameServer

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.netflix.loadbalancer.reactive.LoadBalancerObservable

call

Constructor Detail

LoadBalancerObservableCommand

public LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext)

LoadBalancerObservableCommand

public LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext,
                             com.netflix.client.RetryHandler retryHandler)

LoadBalancerObservableCommand

public LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext,
                             com.netflix.client.RetryHandler retryHandler,
                             ExecutionContextListenerInvoker<?,T> listenerInvoker)

LoadBalancerObservableCommand

public LoadBalancerObservableCommand(LoadBalancerContext loadBalancerContext,
                             com.netflix.client.RetryHandler retryHandler,
                             java.net.URI loadBalancerURI,
                             java.lang.Object loadBalancerKey,
                             ExecutionContextListenerInvoker<?,T> listenerInvoker)

Method Detail

toObservable

public rx.Observable<T> toObservable()

Create an Observable that once subscribed execute network call asynchronously with a server chosen by load balancer. If there are any errors that are indicated as retriable by the RetryHandler, they will be consumed internally by the function and will not be observed by the Observer subscribed to the returned Observable. If number of retries has exceeds the maximal allowed, a final error will be emitted by the returned Observable. Otherwise, the first successful result during execution and retries will be emitted.