Module io.helidon.microprofile.grpc.core

Package io.helidon.microprofile.grpc.core

Interface InstanceSupplier

public interface InstanceSupplier

A supplier of instances of objects.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	InstanceSupplier.NewInstance<T>	A Supplier implementation that supplies new instances of a class each time its Supplier.get() method is called.
static class	InstanceSupplier.SingletonInstance<T>	A Supplier implementation that supplies the same singleton instance of a value each time its Supplier.get() method is called.

Method Summary

Static Methods

Modifier and Type	Method	Description
static <T> Supplier<T>	create(Class<T> cls)	Create an Supplier that supplies a new instances of the specified Class.
static <T> Supplier<T>	singleton(Class<T> cls)	Create an Supplier that supplies a singleton of the specified Class.
static <T> Supplier<T>	singleton(T instance)	Create a Supplier that supplies a singleton.

Method Details

singleton

static <T> Supplier<T> singleton(T instance)

Create a Supplier that supplies a singleton.

Type Parameters:

T - the type of instance supplied

Parameters:

instance - the singleton instance to supply

Returns:

the singleton instance

Throws:

NullPointerException - if the instance parameter is null

singleton

static <T> Supplier<T> singleton(Class<T> cls)

Create an Supplier that supplies a singleton of the specified Class.

The Class provided must have a no-args default constructor.

Type Parameters:

T - the type of instance supplied

Parameters:

cls - the Class of the singleton instance to supply

Returns:

the singleton instance of the specified Class

Throws:

NullPointerException - if the class is null

create

static <T> Supplier<T> create(Class<T> cls)

Create an Supplier that supplies a new instances of the specified Class.

The Class provided must have a no-args default constructor.

A new instance of the specified Class is created for every call to Supplier.get().

Type Parameters:

T - the type of instance supplied

Parameters:

cls - the Class of the singleton instance to supply

Returns:

the singleton instance of the specified Class

Throws:

NullPointerException - if the class is null