Package io.smallrye.stork.api

Class Service

java.lang.Object

io.smallrye.stork.api.Service

public class Service
extends Object

Represents a Service.

This container gives you access to the service instances and to the selected service instance.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Service.Builder

Constructor Summary

Constructors

Constructor	Description
Service(String serviceName, String serviceSelectionType, String serviceDiscoveryType, ObservationCollector collector, LoadBalancer loadBalancer, ServiceDiscovery serviceDiscovery, ServiceRegistrar<?> serviceRegistrar, boolean requiresStrictRecording)	Creates a new Service.

Method Summary

Modifier and Type	Method	Description
io.smallrye.mutiny.Uni<List<ServiceInstance>>	getInstances()	Provide a collection of available ServiceInstances
LoadBalancer	getLoadBalancer()	Get the underlying load balancer instance.
ObservationCollector	getObservations()
ServiceDiscovery	getServiceDiscovery()	Get the underlying service discovery
String	getServiceName()
ServiceRegistrar	getServiceRegistrar()	Get the underlying service registrar
io.smallrye.mutiny.Uni<ServiceInstance>	selectInstance()	Selects a service instance.
ServiceInstance	selectInstance(Collection<ServiceInstance> instances)	Using the underlying load balancer, select a service instance from the collection of service instances.
io.smallrye.mutiny.Uni<ServiceInstance>	selectInstanceAndRecordStart(boolean measureTime)	Selects a service instance and records a start of an operation using the instance
ServiceInstance	selectInstanceAndRecordStart(Collection<ServiceInstance> instances, boolean measureTime)	Select a ServiceInstance for this service from a collection and record a start of an operation using the instance.

Methods inherited from class java.lang.Object

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

Constructor Details

Service

public Service(String serviceName,
 String serviceSelectionType,
 String serviceDiscoveryType,
 ObservationCollector collector,
 LoadBalancer loadBalancer,
 ServiceDiscovery serviceDiscovery,
 ServiceRegistrar<?> serviceRegistrar,
 boolean requiresStrictRecording)

Creates a new Service.

Parameters:

serviceName - the name, must not be null, must not be blank

serviceSelectionType - the type of the service selection (for observability purpose)

serviceDiscoveryType - the type of the service discovery (for observability purpose)

collector - the observation collector, must not be null

loadBalancer - the load balancer, can be null

serviceDiscovery - the service discovery, must not be null

serviceRegistrar - the service registrar, can be null

requiresStrictRecording - whether strict recording must be enabled

Method Details

selectInstance

public io.smallrye.mutiny.Uni<ServiceInstance> selectInstance()

Selects a service instance.

The selection looks for the service instances and select the one to use using the load balancer.

Note: this method doesn't record a start of an operation using this load balancer and does not synchronize load balancer invocations even if the load balancer is not thread safe

Returns:

a Uni with a ServiceInstance, or with NoServiceInstanceFoundException if the load balancer failed to find a service instance capable of handling a call

selectInstance

public ServiceInstance selectInstance(Collection<ServiceInstance> instances)

Using the underlying load balancer, select a service instance from the collection of service instances.

Note: this method doesn't record a start of an operation using this load balancer and does not synchronize load balancer invocations even if the load balancer is not thread safe

Parameters:

instances - collection of instances

Returns:

a ServiceInstance, or with NoServiceInstanceFoundException if the load balancer failed to find a service instance capable of handling a call

Throws:

NoServiceInstanceFoundException - if all the instances are nto

selectInstanceAndRecordStart

public io.smallrye.mutiny.Uni<ServiceInstance> selectInstanceAndRecordStart(boolean measureTime)

Selects a service instance and records a start of an operation using the instance

The selection looks for the service instances and select the one to use using the load balancer.

Parameters:

measureTime - whether the operation for which the operation is chosen records time (will call ServiceInstance.recordReply())

Returns:

a Uni with a ServiceInstance, or with NoServiceInstanceFoundException if the load balancer failed to find a service instance capable of handling a call

See Also:

• LoadBalancer.requiresStrictRecording()

selectInstanceAndRecordStart

public ServiceInstance selectInstanceAndRecordStart(Collection<ServiceInstance> instances,
 boolean measureTime)

Select a ServiceInstance for this service from a collection and record a start of an operation using the instance.

Access to the underlying LoadBalancer method is serialized.

Parameters:

instances - instances to choose from

measureTime - whether the operation for which the operation is chosen records time (will call ServiceInstance.recordReply())

Returns:

the selected instance

See Also:

• selectInstanceAndRecordStart(boolean)
• LoadBalancer.requiresStrictRecording()

getInstances

public io.smallrye.mutiny.Uni<List<ServiceInstance>> getInstances()

Provide a collection of available ServiceInstances

Returns:

a Uni producing the list of ServiceInstances.

getLoadBalancer

public LoadBalancer getLoadBalancer()

Get the underlying load balancer instance.

Returns:

load balancer

getServiceDiscovery

public ServiceDiscovery getServiceDiscovery()

Get the underlying service discovery

Returns:

service discovery

getServiceRegistrar

public ServiceRegistrar getServiceRegistrar()

Get the underlying service registrar

Returns:

service registrar

getObservations

public ObservationCollector getObservations()

getServiceName

public String getServiceName()

Returns:

the service name.