com.lightbend.lagom.javadsl.api

Class ConfigurationServiceLocator

Object

com.lightbend.lagom.javadsl.api.ConfigurationServiceLocator

All Implemented Interfaces:

ServiceLocator

@Singleton
public class ConfigurationServiceLocator
extends Object
implements ServiceLocator

A service locator that uses static configuration.

Constructor Summary

Constructors

Constructor and Description
ConfigurationServiceLocator(play.Configuration configuration)

Method Summary

Modifier and Type	Method and Description
<T> java.util.concurrent.CompletionStage<java.util.Optional<T>>	doWithService(String name, Descriptor.Call<?,?> serviceCall, java.util.function.Function<java.net.URI,java.util.concurrent.CompletionStage<T>> block) Do the given action with the given service.
java.util.concurrent.CompletionStage<java.util.Optional<java.net.URI>>	locate(String name, Descriptor.Call<?,?> serviceCall) Locate a service with the given name.

Methods inherited from class Object

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

Methods inherited from interface com.lightbend.lagom.javadsl.api.ServiceLocator

locate

Constructor Detail

ConfigurationServiceLocator

@Inject
public ConfigurationServiceLocator(play.Configuration configuration)

Method Detail

locate

public java.util.concurrent.CompletionStage<java.util.Optional<java.net.URI>> locate(String name,
                                                                                     Descriptor.Call<?,?> serviceCall)

Description copied from interface: ServiceLocator

Locate a service with the given name.

Specified by:

locate in interface ServiceLocator

Parameters:

name - The name of the service.

serviceCall - The service call descriptor that this lookup is for.

Returns:

The URI for that service, if it exists.

doWithService

public <T> java.util.concurrent.CompletionStage<java.util.Optional<T>> doWithService(String name,
                                                                                     Descriptor.Call<?,?> serviceCall,
                                                                                     java.util.function.Function<java.net.URI,java.util.concurrent.CompletionStage<T>> block)

Description copied from interface: ServiceLocator

Do the given action with the given service. This should be used in preference to ServiceLocator.locate(String, Descriptor.Call) when possible as it will allow the service locator to add in things like circuit breakers. It is required that the service locator will, based on the service call circuit breaker configuration, wrap the invocation of the passed in block with a circuit breaker.

Specified by:

doWithService in interface ServiceLocator

Parameters:

name - The name of the service.

serviceCall - The service call descriptor that this lookup is for.

block - A block of code that takes the URI for the service, and returns a future of some work done on the service. This will only be executed if the service was found.

Returns:

The result of the executed block, if the service was found.