mirror of
https://github.com/tiennm99/java-design-patterns.git
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docs: update service layer
This commit is contained in:
Ilkka Seppälä
+172
-50
@@ -85,7 +85,9 @@ public interface WizardDao extends Dao<Wizard> {
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Wizard findByName(String name);
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}
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```
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```java
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public class WizardDaoImpl extends DaoBaseImpl<Wizard> implements WizardDao {
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@Override
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@@ -167,62 +169,182 @@ public class MagicServiceImpl implements MagicService {
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}
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```
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And finally we can show how the client `App` interacts with `MagicService` in the Service Layer.
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And finally, we can show how the client `App` interacts with `MagicService` in the Service Layer.
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```java
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var service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao);
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LOGGER.info("Enumerating all wizards");
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service.findAllWizards().stream().map(Wizard::getName).forEach(LOGGER::info);
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LOGGER.info("Enumerating all spellbooks");
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service.findAllSpellbooks().stream().map(Spellbook::getName).forEach(LOGGER::info);
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LOGGER.info("Enumerating all spells");
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service.findAllSpells().stream().map(Spell::getName).forEach(LOGGER::info);
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LOGGER.info("Find wizards with spellbook 'Book of Idores'");
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var wizardsWithSpellbook = service.findWizardsWithSpellbook("Book of Idores");
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wizardsWithSpellbook.forEach(w -> LOGGER.info("{} has 'Book of Idores'", w.getName()));
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LOGGER.info("Find wizards with spell 'Fireball'");
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var wizardsWithSpell = service.findWizardsWithSpell("Fireball");
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wizardsWithSpell.forEach(w -> LOGGER.info("{} has 'Fireball'", w.getName()));
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@Slf4j
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public class App {
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public static final String BOOK_OF_IDORES = "Book of Idores";
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public static void main(String[] args) {
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// populate the in-memory database
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initData();
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// query the data using the service
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queryData();
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}
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public static void initData() {
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// spells
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var spell1 = new Spell("Ice dart");
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var spell2 = new Spell("Invisibility");
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var spell3 = new Spell("Stun bolt");
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var spell4 = new Spell("Confusion");
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var spell5 = new Spell("Darkness");
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var spell6 = new Spell("Fireball");
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var spell7 = new Spell("Enchant weapon");
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var spell8 = new Spell("Rock armour");
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var spell9 = new Spell("Light");
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var spell10 = new Spell("Bee swarm");
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var spell11 = new Spell("Haste");
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var spell12 = new Spell("Levitation");
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var spell13 = new Spell("Magic lock");
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var spell14 = new Spell("Summon hell bat");
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var spell15 = new Spell("Water walking");
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var spell16 = new Spell("Magic storm");
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var spell17 = new Spell("Entangle");
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var spellDao = new SpellDaoImpl();
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spellDao.persist(spell1);
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spellDao.persist(spell2);
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spellDao.persist(spell3);
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spellDao.persist(spell4);
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spellDao.persist(spell5);
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spellDao.persist(spell6);
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spellDao.persist(spell7);
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spellDao.persist(spell8);
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spellDao.persist(spell9);
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spellDao.persist(spell10);
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spellDao.persist(spell11);
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spellDao.persist(spell12);
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spellDao.persist(spell13);
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spellDao.persist(spell14);
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spellDao.persist(spell15);
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spellDao.persist(spell16);
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spellDao.persist(spell17);
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// spellbooks
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var spellbookDao = new SpellbookDaoImpl();
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var spellbook1 = new Spellbook("Book of Orgymon");
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spellbookDao.persist(spellbook1);
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spellbook1.addSpell(spell1);
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spellbook1.addSpell(spell2);
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spellbook1.addSpell(spell3);
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spellbook1.addSpell(spell4);
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spellbookDao.merge(spellbook1);
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var spellbook2 = new Spellbook("Book of Aras");
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spellbookDao.persist(spellbook2);
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spellbook2.addSpell(spell5);
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spellbook2.addSpell(spell6);
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spellbookDao.merge(spellbook2);
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var spellbook3 = new Spellbook("Book of Kritior");
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spellbookDao.persist(spellbook3);
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spellbook3.addSpell(spell7);
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spellbook3.addSpell(spell8);
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spellbook3.addSpell(spell9);
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spellbookDao.merge(spellbook3);
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var spellbook4 = new Spellbook("Book of Tamaex");
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spellbookDao.persist(spellbook4);
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spellbook4.addSpell(spell10);
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spellbook4.addSpell(spell11);
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spellbook4.addSpell(spell12);
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spellbookDao.merge(spellbook4);
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var spellbook5 = new Spellbook(BOOK_OF_IDORES);
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spellbookDao.persist(spellbook5);
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spellbook5.addSpell(spell13);
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spellbookDao.merge(spellbook5);
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var spellbook6 = new Spellbook("Book of Opaen");
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spellbookDao.persist(spellbook6);
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spellbook6.addSpell(spell14);
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spellbook6.addSpell(spell15);
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spellbookDao.merge(spellbook6);
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var spellbook7 = new Spellbook("Book of Kihione");
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spellbookDao.persist(spellbook7);
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spellbook7.addSpell(spell16);
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spellbook7.addSpell(spell17);
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spellbookDao.merge(spellbook7);
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// wizards
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var wizardDao = new WizardDaoImpl();
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var wizard1 = new Wizard("Aderlard Boud");
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wizardDao.persist(wizard1);
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wizard1.addSpellbook(spellbookDao.findByName("Book of Orgymon"));
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wizard1.addSpellbook(spellbookDao.findByName("Book of Aras"));
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wizardDao.merge(wizard1);
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var wizard2 = new Wizard("Anaxis Bajraktari");
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wizardDao.persist(wizard2);
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wizard2.addSpellbook(spellbookDao.findByName("Book of Kritior"));
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wizard2.addSpellbook(spellbookDao.findByName("Book of Tamaex"));
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wizardDao.merge(wizard2);
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var wizard3 = new Wizard("Xuban Munoa");
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wizardDao.persist(wizard3);
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wizard3.addSpellbook(spellbookDao.findByName(BOOK_OF_IDORES));
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wizard3.addSpellbook(spellbookDao.findByName("Book of Opaen"));
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wizardDao.merge(wizard3);
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var wizard4 = new Wizard("Blasius Dehooge");
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wizardDao.persist(wizard4);
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wizard4.addSpellbook(spellbookDao.findByName("Book of Kihione"));
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wizardDao.merge(wizard4);
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}
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public static void queryData() {
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var wizardDao = new WizardDaoImpl();
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var spellbookDao = new SpellbookDaoImpl();
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var spellDao = new SpellDaoImpl();
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var service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao);
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LOGGER.info("Enumerating all wizards");
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service.findAllWizards().stream().map(Wizard::getName).forEach(LOGGER::info);
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LOGGER.info("Enumerating all spellbooks");
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service.findAllSpellbooks().stream().map(Spellbook::getName).forEach(LOGGER::info);
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LOGGER.info("Enumerating all spells");
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service.findAllSpells().stream().map(Spell::getName).forEach(LOGGER::info);
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LOGGER.info("Find wizards with spellbook 'Book of Idores'");
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var wizardsWithSpellbook = service.findWizardsWithSpellbook(BOOK_OF_IDORES);
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wizardsWithSpellbook.forEach(w -> LOGGER.info("{} has 'Book of Idores'", w.getName()));
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LOGGER.info("Find wizards with spell 'Fireball'");
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var wizardsWithSpell = service.findWizardsWithSpell("Fireball");
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wizardsWithSpell.forEach(w -> LOGGER.info("{} has 'Fireball'", w.getName()));
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}
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}
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```
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The program output:
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```
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INFO [2024-05-20 10:00:24,548] com.iluwatar.servicelayer.app.App: Enumerating all wizards
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INFO [2024-05-20 10:00:24,550] com.iluwatar.servicelayer.app.App: Aderlard Boud
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INFO [2024-05-20 10:00:24,550] com.iluwatar.servicelayer.app.App: Anaxis Bajraktari
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INFO [2024-05-20 10:00:24,551] com.iluwatar.servicelayer.app.App: Xuban Munoa
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INFO [2024-05-20 10:00:24,551] com.iluwatar.servicelayer.app.App: Blasius Dehooge
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INFO [2024-05-20 10:00:24,551] com.iluwatar.servicelayer.app.App: Enumerating all spellbooks
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Orgymon
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Aras
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Kritior
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Tamaex
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Idores
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Opaen
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Book of Kihione
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INFO [2024-05-20 10:00:24,554] com.iluwatar.servicelayer.app.App: Enumerating all spells
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Ice dart
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Invisibility
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Stun bolt
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Confusion
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Darkness
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Fireball
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Enchant weapon
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Rock armour
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Light
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INFO [2024-05-20 10:00:24,558] com.iluwatar.servicelayer.app.App: Bee swarm
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Haste
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Levitation
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Magic lock
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Summon hell bat
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Water walking
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Magic storm
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Entangle
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INFO [2024-05-20 10:00:24,559] com.iluwatar.servicelayer.app.App: Find wizards with spellbook 'Book of Idores'
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INFO [2024-05-20 10:00:24,560] com.iluwatar.servicelayer.app.App: Xuban Munoa has 'Book of Idores'
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INFO [2024-05-20 10:00:24,560] com.iluwatar.servicelayer.app.App: Find wizards with spell 'Fireball'
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INFO [2024-05-20 10:00:24,562] com.iluwatar.servicelayer.app.App: Aderlard Boud has 'Fireball'
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INFO [2024-05-27 09:16:40,668] com.iluwatar.servicelayer.app.App: Enumerating all wizards
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INFO [2024-05-27 09:16:40,671] com.iluwatar.servicelayer.app.App: Aderlard Boud
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INFO [2024-05-27 09:16:40,671] com.iluwatar.servicelayer.app.App: Anaxis Bajraktari
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INFO [2024-05-27 09:16:40,671] com.iluwatar.servicelayer.app.App: Xuban Munoa
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INFO [2024-05-27 09:16:40,671] com.iluwatar.servicelayer.app.App: Blasius Dehooge
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INFO [2024-05-27 09:16:40,671] com.iluwatar.servicelayer.app.App: Enumerating all spellbooks
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Orgymon
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Aras
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Kritior
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Tamaex
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Idores
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Opaen
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Book of Kihione
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INFO [2024-05-27 09:16:40,675] com.iluwatar.servicelayer.app.App: Enumerating all spells
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Ice dart
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Invisibility
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Stun bolt
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Confusion
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Darkness
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Fireball
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Enchant weapon
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Rock armour
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Light
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Bee swarm
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Haste
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Levitation
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Magic lock
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Summon hell bat
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Water walking
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Magic storm
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INFO [2024-05-27 09:16:40,679] com.iluwatar.servicelayer.app.App: Entangle
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INFO [2024-05-27 09:16:40,680] com.iluwatar.servicelayer.app.App: Find wizards with spellbook 'Book of Idores'
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INFO [2024-05-27 09:16:40,680] com.iluwatar.servicelayer.app.App: Xuban Munoa has 'Book of Idores'
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INFO [2024-05-27 09:16:40,681] com.iluwatar.servicelayer.app.App: Find wizards with spell 'Fireball'
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INFO [2024-05-27 09:16:40,683] com.iluwatar.servicelayer.app.App: Aderlard Boud has 'Fireball'
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```
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## Class diagram
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@@ -265,4 +387,4 @@ Trade-offs:
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* [Core J2EE Patterns: Best Practices and Design Strategies](https://amzn.to/4cAbDap)
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* [Patterns of Enterprise Application Architecture](https://amzn.to/3WfKBPR)
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* [Spring in Action](https://amzn.to/4asnpSG)
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* [Martin Fowler - Service Layer](http://martinfowler.com/eaaCatalog/serviceLayer.html)
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* [Service Layer (Martin Fowler)](http://martinfowler.com/eaaCatalog/serviceLayer.html)
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