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Merge pull request #14 from briancorbinxyz/jdk23
Jdk23
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,11 @@ | ||
| package org.example; | ||
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| /// This interface defines a contract for classes that can be serialized to JSON strings. | ||
| /// Any class that implements this interface must provide an implementation of the `asJsonString()` | ||
| /// method, which returns the JSON representation of the object. | ||
| public interface JsonSerializable { | ||
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| /// Returns the JSON representation of the object. | ||
| /// @return the JSON string representation of the object. | ||
| String asJsonString(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,19 +1,21 @@ | ||
| package org.example; | ||
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| /** | ||
| * Tic-tac-toe player interface for all players | ||
| * {@snippet : | ||
| * // Create a human player | ||
| * Player player = new HumanPlayer("X"); // @highlight region="player" substring="player" | ||
| * | ||
| * // Choose the next valid move on the game board | ||
| * int validBoardLocation = player.nextMove(gameBoard); // @end | ||
| * } | ||
| */ | ||
| /// Tic-tac-toe player interface for all players | ||
| /// {@snippet : | ||
| /// // Create a human player | ||
| /// Player player = new HumanPlayer("X"); // @highlight region="player" substring="player" | ||
| /// | ||
| /// // Choose the next valid move on the game board | ||
| /// int validBoardLocation = player.nextMove(gameBoard); // @end | ||
| /// } | ||
| public sealed interface Player permits HumanPlayer, BotPlayer, RemoteBotPlayer { | ||
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| /// Returns the marker (e.g. "X" or "O") used by this player. | ||
| /// @return the player's marker | ||
| String getPlayerMarker(); | ||
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| /// Chooses the next valid move on the game board. | ||
| /// @param board the current state of the game board | ||
| /// @return the index of the next valid move on the board | ||
| int nextMove(GameBoard board); | ||
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| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| package org.example.interop; | ||
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| import java.lang.invoke.MethodHandles; | ||
| import java.lang.invoke.VarHandle; | ||
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| public class PlayerIds { | ||
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| private volatile int nextId; | ||
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| private static final VarHandle NEXT_ID_VH; | ||
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| static { | ||
| try { | ||
| NEXT_ID_VH = MethodHandles.lookup().findVarHandle(PlayerIds.class, "nextId", int.class); | ||
| } catch (NoSuchFieldException | IllegalAccessException e) { | ||
| throw new ExceptionInInitializerError(e); | ||
| } | ||
| } | ||
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| public PlayerIds(int initialValue) { | ||
| this.nextId = initialValue; | ||
| } | ||
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| public int getNextId() { | ||
| return nextId; | ||
| } | ||
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| public int getNextIdAndIncrement() { | ||
| return (int) NEXT_ID_VH.getAndAdd(this, 1); | ||
| } | ||
| } |
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105 changes: 105 additions & 0 deletions
105
app/src/main/java/org/example/interop/benchmark/PlayerIdsBenchmark.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package org.example.interop.benchmark; | ||
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| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
| import java.util.concurrent.locks.ReentrantLock; | ||
| import org.example.interop.PlayerIds; | ||
| import org.openjdk.jmh.annotations.Benchmark; | ||
| import org.openjdk.jmh.annotations.BenchmarkMode; | ||
| import org.openjdk.jmh.annotations.Mode; | ||
| import org.openjdk.jmh.annotations.OutputTimeUnit; | ||
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| @SuppressWarnings("unused") | ||
| public class PlayerIdsBenchmark { | ||
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| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.NANOSECONDS) | ||
| public void testPlayerIdsGetId() { | ||
| PlayerIds ids = new PlayerIds(1); | ||
| for (int i = 0; i < 1000; i++) { | ||
| var id = ids.getNextId(); | ||
| } | ||
| } | ||
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| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.NANOSECONDS) | ||
| public void testPlayerIdsGetAndIncrementId() { | ||
| PlayerIds ids = new PlayerIds(1); | ||
| for (int i = 0; i < 1000; i++) { | ||
| var id = ids.getNextIdAndIncrement(); | ||
| } | ||
| } | ||
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| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.NANOSECONDS) | ||
| public void testAtomicIntegerGetId() { | ||
| AtomicInteger ids = new AtomicInteger(1); | ||
| for (int i = 0; i < 1000; i++) { | ||
| var id = ids.get(); | ||
| } | ||
| } | ||
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| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.NANOSECONDS) | ||
| public void testAtomicIntegerGetAndIncrement() { | ||
| AtomicInteger ids = new AtomicInteger(1); | ||
| for (int i = 0; i < 1000; i++) { | ||
| var id = ids.getAndIncrement(); | ||
| } | ||
| } | ||
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| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.NANOSECONDS) | ||
| public void testLockGetId() { | ||
| Control ids = new Control(1); | ||
| for (int i = 0; i < 1000; i++) { | ||
| var id = ids.getId(); | ||
| } | ||
| } | ||
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| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.NANOSECONDS) | ||
| public void testLockGetAndIncrement() { | ||
| Control ids = new Control(1); | ||
| for (int i = 0; i < 1000; i++) { | ||
| var id = ids.getAndIncrement(); | ||
| } | ||
| } | ||
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| /// Naive implementation of an id generator. | ||
| private static class Control { | ||
| private final ReentrantLock lock = new ReentrantLock(); | ||
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| private int id = 1; | ||
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| private Control(int initialValue) { | ||
| this.id = initialValue; | ||
| } | ||
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| private int getId() { | ||
| lock.lock(); | ||
| try { | ||
| return id; | ||
| } finally { | ||
| lock.unlock(); | ||
| } | ||
| } | ||
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| private int getAndIncrement() { | ||
| lock.lock(); | ||
| try { | ||
| int oldId = id; | ||
| id = id + 1; | ||
| return oldId; | ||
| } finally { | ||
| lock.unlock(); | ||
| } | ||
| } | ||
| } | ||
| } |
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