Conversation
BorderPane med 3 delar Lagt till tillfälliga metoder i controller för vyn
…den ska sparas chatt-liknade I controller - en observable som lyssnar på förändringar
Övriga förändringar - nätverksanslutningar.
vidare uppdateringar för att anpassa efter nya listan, record och cellfactory.
Även lagt till att medelanden visas olika beroende på inkomande eller skickad
…er radarn" i klasser som berörs. Körs med fungerar ej helt som den ska. Nytt test för att ta emot meddelanden från en fakead server.
WalkthroughThis PR transforms a simple greeting application into a JavaFX-based chat messenger. It introduces a Changes
Sequence Diagram(s)sequenceDiagram
actor User
participant UI as HelloController
participant Model as HelloModel
participant Conn as NtfyConnectionImpl
participant Server as NtfyServer
Note over UI,Server: Send Message Flow
User->>UI: Type message + click Send
UI->>UI: updateSendButtonState()
UI->>Model: sendMessage(text)
Model->>Conn: send(message)
Conn->>Server: POST /catChat
Server-->>Conn: 200 OK
Conn-->>Model: true
Note over UI,Server: Receive Message Flow
UI->>Model: receiveMessage()
Model->>Conn: receive(consumer)
Conn->>Server: GET /catChat/json (streaming)
Server-->>Conn: JSON lines (events)
Conn->>Conn: Parse event == "message"
Conn->>Model: consumer.accept(NtfyMessageDto)
Model->>Model: messages.add(dto)
Model-->>UI: ListChangeListener fires
UI->>UI: ListView updates
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes
Poem
Pre-merge checks and finishing touches❌ Failed checks (1 warning)
✅ Passed checks (2 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Actionable comments posted: 7
🧹 Nitpick comments (18)
src/main/java/com/example/HelloFX.java (1)
3-3: Remove unused import.The
Dotenvimport is not used in this file.Apply this diff:
-import io.github.cdimascio.dotenv.Dotenv;src/main/java/com/example/Subscription.java (1)
6-13: Well-designed interface with minor refinements available.The interface design is clean and appropriate for managing subscription lifecycle.
Optional improvements:
The
@Overrideannotation and redeclaration ofclose()is redundant since it's inherited fromCloseable. You can remove it unless you need to add JavaDoc.Consider using English for comments to support international collaboration:
public interface Subscription extends Closeable { - //Stoppar en subscription - @Override - void close() throws IOException; - - //Meddelar om Subscription är öppen + // Returns true if the subscription is open boolean isOpen(); }src/main/java/com/example/NtfyMessageDto.java (2)
11-14: Remove commented-out code.Commented-out code reduces readability. If you need this constructor later, it can be retrieved from version control.
Apply this diff:
@JsonIgnoreProperties(ignoreUnknown = true) public record NtfyMessageDto(String id, Long time, String event, String topic, String message) { - //Convenience Konstruktor - som en genväg till record fält -// public NtfyMessageDto(String message) { -// this("thisID", System.currentTimeMillis()/1000, "message", "catChat", message); -// } - public String formattedTime() {
17-23: Consider making timezone configurable.The method hardcodes
ZoneId.of("Europe/Stockholm"), which makes the timestamp display timezone-dependent and less portable.Consider using the system default timezone or making it configurable:
public String formattedTime() { if (time == null) return ""; return DateTimeFormatter.ofPattern("HH:mm") .format(Instant.ofEpochSecond(time) - .atZone(ZoneId.of("Europe/Stockholm"))); + .atZone(ZoneId.systemDefault())); }Alternatively, if the timezone must be Stockholm, consider documenting this requirement and the reasoning behind it.
src/test/java/com/example/NtfyConnectionSpy.java (1)
9-11: Make test spy fields explicitly private.The fields
messageandconsumershould be explicitly marked asprivateto follow best practices for encapsulation.Apply this diff:
- String message; - //funktionen som ska köras när ett meddelande kommer - Consumer<NtfyMessageDto> consumer; + private String message; + //funktionen som ska köras när ett meddelande kommer + private Consumer<NtfyMessageDto> consumer;src/test/java/com/example/HelloModelTest.java (3)
25-35: Remove unnecessarysetMessageToSend("")call.Line 30 sets an empty message that is immediately overwritten by the
sendMessage("Hello World")call on Line 32. This line appears to be a testing artifact and can be safely removed.Apply this diff:
var spy = new NtfyConnectionSpy(); var model = new HelloModel(spy); //Act - model.setMessageToSend(""); - model.sendMessage("Hello World");
54-58: Remove commented-out code.The commented Mockito code (Lines 54-58) should be removed to keep the test clean and maintainable.
Apply this diff:
.withBody(fakeMessage))); -// Consumer<NtfyMessageDto> fakeReceiver = Mockito.mock(Consumer.class); -// //con.receive(fakeReceiver); -// -// ArgumentCaptor<NtfyMessageDto> captor = ArgumentCaptor.forClass(NtfyMessageDto.class); -// Subscription subscription = con.receive(fakeReceiver); - -// //Act - var model =new HelloModel(con);
79-89: Remove unnecessarysetMessageToSend("")call.Line 82 sets an empty message that is not used in the test. The
sendMessagemethod on Line 85 directly sets the message content.Apply this diff:
var con = new NtfyConnectionImpl("http://localhost:" + wmRuntimeInfo.getHttpPort()); var model = new HelloModel(con); - model.setMessageToSend(""); stubFor(post("/catChat").willReturn(ok()));src/main/java/com/example/HelloController.java (5)
17-18: Consider dependency injection for NtfyConnection.The controller directly instantiates
NtfyConnectionImpl, creating tight coupling that makes testing more difficult and reduces flexibility. Consider accepting the connection as a constructor parameter or using a factory pattern.For example:
private final HelloModel model; public HelloController() { this(new NtfyConnectionImpl()); } // Package-private constructor for testing HelloController(NtfyConnection connection) { this.model = new HelloModel(connection); }
43-44: Address or remove TODO comments.These TODO comments should either be implemented or removed before merging. If the functionality is planned for later, consider creating a tracked issue instead.
62-62: Remove commented-out code.The commented call to
model.receiveMessage()should be removed to keep the codebase clean.Apply this diff:
disconnectFromServer.setDisable(true); - //model.receiveMessage(); //Styr hur varje meddelande ska visas i chatboxen
88-88: Hard-coded width calculation may cause layout issues.The expression
chatBox.getWidth()-20uses a magic number and may not adapt well to different screen sizes or when the chat box is resized.Consider binding the max width to the parent's width property:
hbox.maxWidthProperty().bind(chatBox.widthProperty().subtract(20));
90-97: String-based message type detection is fragile.Using
startsWith("User:")to determine message alignment is brittle and tightly couples the UI to message content format. If the prefix changes or is localized, this logic will break.Consider adding a message direction/type property to
NtfyMessageDto(e.g., an enum withINCOMING/OUTGOINGvalues) to make the logic more robust:if (item.direction() == MessageDirection.OUTGOING) { hbox.setAlignment(javafx.geometry.Pos.CENTER_RIGHT); label.getStyleClass().add("outgoing-message"); } else { hbox.setAlignment(javafx.geometry.Pos.CENTER_LEFT); label.getStyleClass().add("incoming-message"); }src/main/java/com/example/HelloModel.java (3)
34-38: Remove commented-out subscription initialization.Line 37 contains commented code that should be removed. The current design where the controller explicitly calls
receiveMessage()appears to be the intended behavior.Apply this diff:
public HelloModel(NtfyConnection connection) { this.connection = connection; - //subscription = receiveMessage(); //subscription startar automatiskt när modellen skapas }
44-47: Clarify or remove unclear comment.The comment
//teston Line 44 doesn't provide meaningful information. Either clarify its purpose or remove it.
67-74: Simplify receiveMessage logic with early return.The nested if statement can be simplified using an early return pattern for better readability.
Apply this diff:
public Subscription receiveMessage() { -if(subscription != null && subscription.isOpen()) { - return this.subscription; -} - return subscription = connection.receive(messages::add); - - + if (subscription != null && subscription.isOpen()) { + return subscription; + } + subscription = connection.receive(messages::add); + return subscription; }src/main/java/com/example/NtfyConnectionImpl.java (2)
24-27: Add descriptive message torequireNonNull.Line 26 uses
Objects.requireNonNullwithout a descriptive message. Adding a message improves debugging when the environment variable is missing.Apply this diff:
public NtfyConnectionImpl() { Dotenv dotenv = Dotenv.load(); - hostName = Objects.requireNonNull(dotenv.get("HOST_NAME")); + hostName = Objects.requireNonNull(dotenv.get("HOST_NAME"), "HOST_NAME environment variable is required"); }
46-50: Consider using a logging framework instead of console output.Lines 46-50 print errors directly to
System.out, which makes it difficult to control log levels and integrate with logging infrastructure in production.Consider using a logging framework like SLF4J or java.util.logging for better error handling and observability.
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src/main/resources/cat_pattern.pngis excluded by!**/*.pngsrc/main/resources/coolCat.pngis excluded by!**/*.png
📒 Files selected for processing (14)
.gitignore(1 hunks)pom.xml(3 hunks)src/main/java/com/example/HelloController.java(1 hunks)src/main/java/com/example/HelloFX.java(1 hunks)src/main/java/com/example/HelloModel.java(1 hunks)src/main/java/com/example/NtfyConnection.java(1 hunks)src/main/java/com/example/NtfyConnectionImpl.java(1 hunks)src/main/java/com/example/NtfyMessageDto.java(1 hunks)src/main/java/com/example/Subscription.java(1 hunks)src/main/java/module-info.java(1 hunks)src/main/resources/com/example/hello-view.fxml(1 hunks)src/main/resources/css/style.css(1 hunks)src/test/java/com/example/HelloModelTest.java(1 hunks)src/test/java/com/example/NtfyConnectionSpy.java(1 hunks)
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🔇 Additional comments (15)
.gitignore (1)
3-3: LGTM! Appropriate addition for environment configuration.Adding
.envto.gitignoreis a good practice to prevent sensitive environment variables from being committed to the repository.pom.xml (3)
26-30: LGTM! Appropriate dependency for environment configuration.The dotenv-java dependency supports the
.envfile handling added to the project.
65-70: LGTM! Appropriate test dependency.Awaitility is a good choice for testing asynchronous behavior in the chat application.
37-42: Verify WireMock version choice against project compatibility needs.The latest stable WireMock version is 3.13.1 (released June 12, 2025), while the dependency uses
4.0.0-beta.15. Using a beta version of the next major release introduces potential instability, though the test scope limits the impact. Confirm this version was intentionally chosen for 4.0.0 compatibility testing or consider downgrading to the stable3.13.1.src/main/java/com/example/HelloFX.java (2)
18-19: LGTM! Appropriate UI updates for chat messenger.The scene dimensions and title reflect the application's new chat-focused purpose.
20-20: No changes needed. The icon resource exists atsrc/main/resources/coolCat.png, sogetResourceAsStreamwill successfully load it. The code as-is will not throw aNullPointerException.Likely an incorrect or invalid review comment.
src/main/resources/css/style.css (1)
1-108: LGTM! Comprehensive chat UI styling.The CSS provides well-structured styling for the chat messenger UI with appropriate visual hierarchy, color scheme, and interactive states.
Note: The static analysis warnings from Biome are false positives. Biome is a web CSS linter and doesn't recognize JavaFX-specific CSS properties (prefixed with
-fx-), functions likedropshadow(), or pseudo-classes like:focused. All of these are valid in JavaFX CSS.src/main/resources/com/example/hello-view.fxml (1)
6-31: LGTM! Well-structured chat UI layout.The BorderPane-based layout appropriately organizes the chat interface with clear separation between server controls (top), message display (center), and message input (bottom). All necessary controls are properly wired with
fx:idattributes for controller access.src/main/java/com/example/NtfyMessageDto.java (1)
9-10: LGTM! Appropriate use of record for DTO.The
@JsonIgnoreProperties(ignoreUnknown = true)annotation is a good defensive practice for handling API responses with extra fields.src/main/java/com/example/NtfyConnection.java (1)
7-17: LGTM! Clean interface design.The interface provides a clear contract for message communication with appropriate method signatures for sending messages, sending files, and receiving messages via a consumer pattern.
src/test/java/com/example/NtfyConnectionSpy.java (1)
15-51: Test spy implementation is well-structured.The spy correctly captures sent messages, stores consumers, and provides simulation capabilities for testing. The inner Subscription class properly manages lifecycle state.
src/test/java/com/example/HelloModelTest.java (1)
92-101: Test correctly validates observable list behavior.The test appropriately uses the spy to simulate incoming messages and verifies they appear in the model's observable list.
src/main/java/com/example/HelloController.java (1)
110-147: Connection management and UI state handling look good.The methods correctly manage the subscription lifecycle, update button states, and handle message sending with appropriate validation.
src/main/java/com/example/NtfyConnectionImpl.java (2)
76-86: Subscription implementation correctly manages lifecycle.The anonymous Subscription class appropriately cancels the asynchronous HTTP connection and tracks its state.
54-57: File sending not yet implemented.The
sendFilemethod is currently stubbed and always returns false. This is acceptable if file sending is planned for a future iteration.Consider adding a TODO comment or creating a tracked issue for this feature if it's planned for future implementation.
| <dependency> | ||
| <groupId>tools.jackson.core</groupId> | ||
| <artifactId>jackson-databind</artifactId> | ||
| <version>3.0.1</version> | ||
| </dependency> |
There was a problem hiding this comment.
Incorrect groupId for Jackson dependency.
The groupId tools.jackson.core is incorrect. The correct groupId for Jackson is com.fasterxml.jackson.core.
Apply this diff to fix the dependency:
- <dependency>
- <groupId>tools.jackson.core</groupId>
- <artifactId>jackson-databind</artifactId>
- <version>3.0.1</version>
- </dependency>
+ <dependency>
+ <groupId>com.fasterxml.jackson.core</groupId>
+ <artifactId>jackson-databind</artifactId>
+ <version>2.18.2</version>
+ </dependency>Note: Jackson 3.x is still in alpha/beta. Using the stable 2.x version (2.18.2 is the latest stable) is recommended unless you specifically need 3.x features.
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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| <dependency> | |
| <groupId>tools.jackson.core</groupId> | |
| <artifactId>jackson-databind</artifactId> | |
| <version>3.0.1</version> | |
| </dependency> | |
| <dependency> | |
| <groupId>com.fasterxml.jackson.core</groupId> | |
| <artifactId>jackson-databind</artifactId> | |
| <version>2.18.2</version> | |
| </dependency> |
🤖 Prompt for AI Agents
In pom.xml around lines 21 to 25, the Jackson dependency uses the wrong groupId
"tools.jackson.core" and an unstable 3.0.1 version; change the groupId to
"com.fasterxml.jackson.core" and update the version to a stable 2.x release (for
example 2.18.2) unless you intentionally need Jackson 3.x, ensuring the
dependency block references the correct groupId and recommended stable version.
| <plugin> | ||
| <groupId>org.apache.maven.plugins</groupId> | ||
| <artifactId>maven-compiler-plugin</artifactId> | ||
| <configuration> | ||
| <source>25</source> | ||
| <target>25</target> | ||
| <compilerArgs>--enable-preview</compilerArgs> | ||
| </configuration> | ||
| </plugin> |
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Preview JEPs in JDK 25
- JEP 470 — PEM Encodings of Cryptographic Objects (Preview). [1][2]
- JEP 502 — Stable Values (Preview). [1][3]
- JEP 505 — Structured Concurrency (Fifth Preview). [1][3]
- JEP 507 — Primitive Types in patterns, instanceof, and switch (Third Preview). [1][3]
Other notable non-preview experimental/incubator JEPs in JDK 25:
- JEP 508 — Vector API (Incubator). [1][3]
- JEP 509 — JFR CPU-Time Profiling (Experimental). [1][3]
Sources: JDK 25 release notes and OpenJDK/Oracle announcements. [1][2][3]
Remove the --enable-preview flag from maven-compiler-plugin configuration.
Verification confirms the codebase does not use any Java 25 preview features. The only preview-related element found is a record class (NtfyMessageDto.java), but records are a standard feature since Java 16 and do not require preview enablement. Text blocks in tests are also standard since Java 15. No actual preview features (JEP 470, 502, 505, 507) are used. Remove <compilerArgs>--enable-preview</compilerArgs> from lines 89-97 in pom.xml.
🤖 Prompt for AI Agents
In pom.xml around lines 89 to 97 the maven-compiler-plugin is configured with a
compilerArgs element that enables Java preview features; remove the
<compilerArgs>--enable-preview</compilerArgs> entry from the plugin
configuration so the compiler no longer runs with preview enabled, leaving
source/target as-is.
| public void stopSubscription() { | ||
| if (subscription != null && subscription.isOpen()) | ||
| try{ | ||
| subscription.close(); | ||
| } catch(IOException e) { | ||
| System.out.println("Error closing subscription" + e.getMessage()); | ||
| } | ||
| } |
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Fix error message formatting.
Line 81 has a missing space in the error message concatenation, resulting in "Error closing subscription" instead of "Error closing subscription: ".
Apply this diff:
if (subscription != null && subscription.isOpen())
try{
subscription.close();
} catch(IOException e) {
- System.out.println("Error closing subscription" + e.getMessage());
+ System.out.println("Error closing subscription: " + e.getMessage());
}
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| public void stopSubscription() { | |
| if (subscription != null && subscription.isOpen()) | |
| try{ | |
| subscription.close(); | |
| } catch(IOException e) { | |
| System.out.println("Error closing subscription" + e.getMessage()); | |
| } | |
| } | |
| public void stopSubscription() { | |
| if (subscription != null && subscription.isOpen()) | |
| try{ | |
| subscription.close(); | |
| } catch(IOException e) { | |
| System.out.println("Error closing subscription: " + e.getMessage()); | |
| } | |
| } |
🤖 Prompt for AI Agents
In src/main/java/com/example/HelloModel.java around lines 76 to 83, the error
message concatenation in the catch prints "Error closing subscription" and the
exception message without a separator; update the catch to print a colon and
space before the exception text (i.e., include ": " between the fixed message
and e.getMessage()) so the output reads "Error closing subscription: <message>";
ensure the rest of the try/catch stays intact.
|
|
||
| import io.github.cdimascio.dotenv.Dotenv; | ||
| import javafx.application.Platform; | ||
| import tools.jackson.databind.ObjectMapper; |
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Incorrect Jackson import will cause compilation failure.
Line 5 imports tools.jackson.databind.ObjectMapper, but the standard Jackson library uses com.fasterxml.jackson.databind.ObjectMapper. This incorrect import will prevent the code from compiling unless you're using a non-standard Jackson fork.
Apply this diff:
-import tools.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectMapper;📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| import tools.jackson.databind.ObjectMapper; | |
| import com.fasterxml.jackson.databind.ObjectMapper; |
🤖 Prompt for AI Agents
In src/main/java/com/example/NtfyConnectionImpl.java around line 5, the import
uses tools.jackson.databind.ObjectMapper which is incorrect; replace it with the
standard Jackson import com.fasterxml.jackson.databind.ObjectMapper to fix the
compilation error and ensure the correct ObjectMapper class is referenced.
| String inputMessage = Objects.requireNonNull(message); | ||
| HttpRequest httpRequest = HttpRequest.newBuilder() | ||
| .POST(HttpRequest.BodyPublishers.ofString(inputMessage)) | ||
| .header("Cache", "no") |
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Incorrect HTTP header name.
Line 40 uses "Cache" as the header name, but the correct HTTP header for cache control is "Cache-Control". The current header will be ignored by HTTP clients and servers.
Apply this diff:
HttpRequest httpRequest = HttpRequest.newBuilder()
.POST(HttpRequest.BodyPublishers.ofString(inputMessage))
- .header("Cache", "no")
+ .header("Cache-Control", "no-cache")
.uri(URI.create(hostName + "/catChat"))
.build();Note: Also changed the value to "no-cache" which is a valid Cache-Control directive.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| .header("Cache", "no") | |
| HttpRequest httpRequest = HttpRequest.newBuilder() | |
| .POST(HttpRequest.BodyPublishers.ofString(inputMessage)) | |
| .header("Cache-Control", "no-cache") | |
| .uri(URI.create(hostName + "/catChat")) | |
| .build(); |
🤖 Prompt for AI Agents
In src/main/java/com/example/NtfyConnectionImpl.java around line 40, the HTTP
header is incorrectly named "Cache" with value "no"; change it to the standard
"Cache-Control" header and set its value to the valid directive "no-cache" so
clients/servers recognize and honor the cache policy.
| var connected = http.sendAsync(httpRequest, HttpResponse.BodyHandlers.ofLines()) | ||
| .thenAccept(response -> response.body() | ||
| .map(s -> mapper.readValue(s, NtfyMessageDto.class)) | ||
| .filter(message -> message.event().equals("message")) | ||
| .peek(System.out::println) | ||
| .forEach(message -> Platform.runLater(()-> messageHandler.accept(message)))); |
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Unchecked exception handling required in stream.
Line 72 calls mapper.readValue() which throws a checked IOException, but this exception is not handled within the stream pipeline. This will cause a compilation error. Additionally, there's no error handling if the HTTP request fails.
Wrap the mapping operation in a try-catch block or extract it to a helper method:
var connected = http.sendAsync(httpRequest, HttpResponse.BodyHandlers.ofLines())
.thenAccept(response -> response.body()
- .map(s -> mapper.readValue(s, NtfyMessageDto.class))
+ .map(s -> {
+ try {
+ return mapper.readValue(s, NtfyMessageDto.class);
+ } catch (Exception e) {
+ System.err.println("Error parsing message: " + e.getMessage());
+ return null;
+ }
+ })
+ .filter(Objects::nonNull)
.filter(message -> message.event().equals("message"))
.peek(System.out::println)
- .forEach(message -> Platform.runLater(()-> messageHandler.accept(message))));
+ .forEach(message -> Platform.runLater(() -> messageHandler.accept(message))));Also consider adding error handling for the HTTP request itself using .exceptionally() on the CompletableFuture.
Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In src/main/java/com/example/NtfyConnectionImpl.java around lines 70 to 75, the
stream calls mapper.readValue(...) which throws a checked IOException and the
CompletableFuture lacks HTTP error handling; extract the mapping into a helper
method that catches IOException (returning Optional.empty() or null for invalid
lines) or wraps it in an unchecked exception, then use that helper inside the
stream to avoid compilation errors; additionally attach an .exceptionally(...)
or .whenComplete(...) to the sendAsync CompletableFuture to log/handle
HTTP-level failures so the app can recover or report errors instead of silently
failing.
| requires io.github.cdimascio.dotenv.java; | ||
| requires java.net.http; | ||
| requires tools.jackson.databind; | ||
| requires javafx.graphics; |
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Incorrect Jackson module name.
The module name tools.jackson.databind is incorrect. The correct module name is com.fasterxml.jackson.databind.
Apply this diff:
requires io.github.cdimascio.dotenv.java;
requires java.net.http;
- requires tools.jackson.databind;
+ requires com.fasterxml.jackson.databind;
requires javafx.graphics;This issue is related to the incorrect groupId in pom.xml. Both need to be corrected together.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| requires io.github.cdimascio.dotenv.java; | |
| requires java.net.http; | |
| requires tools.jackson.databind; | |
| requires javafx.graphics; | |
| requires io.github.cdimascio.dotenv.java; | |
| requires java.net.http; | |
| requires com.fasterxml.jackson.databind; | |
| requires javafx.graphics; |
🤖 Prompt for AI Agents
In src/main/java/module-info.java around lines 4 to 7, the declared module
`tools.jackson.databind` is incorrect; replace it with
`com.fasterxml.jackson.databind`. Also update the project's pom.xml to use the
correct Jackson groupId/artifact coordinates (com.fasterxml.jackson) so the
module name matches the dependency; ensure module-info requires
`com.fasterxml.jackson.databind` and the pom dependency entries use the matching
com.fasterxml.jackson groupId and appropriate artifactId/version.
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