ServiceKey

java.lang.Object
- akka.actor.typed.internal.receptionist.AbstractServiceKey
- - akka.actor.typed.receptionist.ServiceKey<T>

Direct Known Subclasses:

DefaultServiceKey
```
public abstract class ServiceKey<T>
extends AbstractServiceKey
```
Scala API: Provides a type safe pattern match for listings.
Using it for pattern match like this will return the reachable service instances:
case MyServiceKey.Listing(reachable) =>
In a non-clustered ActorSystem this will always be all registered instances for a service key. For a clustered environment services on nodes that have been observed unreachable are not among these (note that they could have become unreachable between this message being sent and the receiving actor processing it).

Nested Class Summary

Nested Classes
Modifier and Type Class Description

class ServiceKey.Listing$
Scala API: Provides a type safe pattern match for listings.

class ServiceKey.Registered$

Constructor Summary

Constructors
Constructor Description

ServiceKey()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`static <T> ServiceKey<T>`	`apply(java.lang.String id, scala.reflect.ClassTag<T> classTag)`
`ServiceKey<T>`	`asServiceKey()`
`static <T> ServiceKey<T>`	`create(java.lang.Class<T> clazz, java.lang.String id)`	Java API: Creates a service key.
`abstract java.lang.String`	`id()`
`ServiceKey.Listing$`	`Listing()`	Accessor for nested Scala object
`ServiceKey.Registered$`	`Registered()`	Accessor for nested Scala object

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- ServiceKey
```
public ServiceKey()
```

Method Detail

apply

public static <T> ServiceKey<T> apply(java.lang.String id,
                                      scala.reflect.ClassTag<T> classTag)

create
```
public static <T> ServiceKey<T> create(java.lang.Class<T> clazz,
                                       java.lang.String id)
```
Java API: Creates a service key. The given ID should uniquely define a service with a given protocol.

Parameters:

clazz - (undocumented)

id - (undocumented)

Returns:

(undocumented)

Listing
```
public ServiceKey.Listing$ Listing()
```
Accessor for nested Scala object

Returns:

(undocumented)

Registered
```
public ServiceKey.Registered$ Registered()
```
Accessor for nested Scala object

Returns:

(undocumented)

id
```
public abstract java.lang.String id()
```

asServiceKey
```
public ServiceKey<T> asServiceKey()
```