task: Update Multiton example (#1950)

Co-authored-by: Subhrodip Mohanta <hello@subho.xyz>
This commit is contained in:
Ilkka Seppälä
2022-01-24 18:28:44 +02:00
committed by GitHub
parent 5ce0419b44
commit c87689b247
3 changed files with 53 additions and 27 deletions

View File

@@ -26,13 +26,13 @@ package com.iluwatar.multiton;
import lombok.extern.slf4j.Slf4j;
/**
* Whereas Singleton design pattern introduces single globally accessible object the Multiton
* Whereas Singleton design pattern introduces single globally accessible object, the Multiton
* pattern defines many globally accessible objects. The client asks for the correct instance from
* the Multiton by passing an enumeration as parameter.
* the Multiton by passing an enumeration as a parameter.
*
* <p>There is more than one way to implement the multiton design pattern. In the first example
* {@link Nazgul} is the Multiton and we can ask single {@link Nazgul} from it using {@link
* NazgulName}. The {@link Nazgul}s are statically initialized and stored in concurrent hash map.
* NazgulName}. The {@link Nazgul}s are statically initialized and stored in a concurrent hash map.
*
* <p>In the enum implementation {@link NazgulEnum} is the multiton. It is static and mutable
* because of the way java supports enums.
@@ -47,6 +47,7 @@ public class App {
*/
public static void main(String[] args) {
// eagerly initialized multiton
LOGGER.info("Printing out eagerly initialized multiton contents");
LOGGER.info("KHAMUL={}", Nazgul.getInstance(NazgulName.KHAMUL));
LOGGER.info("MURAZOR={}", Nazgul.getInstance(NazgulName.MURAZOR));
LOGGER.info("DWAR={}", Nazgul.getInstance(NazgulName.DWAR));
@@ -58,6 +59,7 @@ public class App {
LOGGER.info("UVATHA={}", Nazgul.getInstance(NazgulName.UVATHA));
// enum multiton
LOGGER.info("Printing out enum-based multiton contents");
LOGGER.info("KHAMUL={}", NazgulEnum.KHAMUL);
LOGGER.info("MURAZOR={}", NazgulEnum.MURAZOR);
LOGGER.info("DWAR={}", NazgulEnum.DWAR);

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@@ -48,5 +48,4 @@ public class NazgulTest {
assertEquals(name, nazgul.getName());
}
}
}