validation: add flag to log exception

modules/jooby-avaje-validator/src/main/java/io/jooby/avaje/validator/AvajeValidatorModule.java

@@ -55,6 +55,7 @@ public class AvajeValidatorModule implements Extension {
   private StatusCode statusCode = StatusCode.UNPROCESSABLE_ENTITY;
   private String title = "Validation failed";
   private boolean disableDefaultViolationHandler = false;
+  private boolean logException;
 
   /**
    * Setups a configurer callback.
@@ -91,6 +92,16 @@ public AvajeValidatorModule validationTitle(@NonNull String title) {
     return this;
   }
 
+  /**
+   * Ask the error handler to log the exception. Default is: false.
+   *
+   * @return This module.
+   */
+  public AvajeValidatorModule logException() {
+    this.logException = true;
+    return this;
+  }
+
   /**
    * Disables default constraint violation handler. By default {@link AvajeValidatorModule} provides
    * built-in error handler for the {@link ConstraintViolationException} Such exceptions are
@@ -147,7 +158,7 @@ public void install(@NonNull Jooby app) {
     app.getServices().put(BeanValidator.class, new BeanValidatorImpl(validator));
 
     if (!disableDefaultViolationHandler) {
-      app.error(new ConstraintViolationHandler(statusCode, title));
+      app.error(new ConstraintViolationHandler(statusCode, title, logException));
     }
   }
 

modules/jooby-avaje-validator/src/main/java/io/jooby/avaje/validator/ConstraintViolationHandler.java

@@ -13,6 +13,9 @@
 import java.util.List;
 import java.util.Map;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import edu.umd.cs.findbugs.annotations.NonNull;
 import io.avaje.validation.ConstraintViolation;
 import io.avaje.validation.ConstraintViolationException;
@@ -55,17 +58,24 @@
  */
 public class ConstraintViolationHandler implements ErrorHandler {
   private static final String ROOT_VIOLATIONS_PATH = "";
+  private final Logger log = LoggerFactory.getLogger(getClass());
   private final StatusCode statusCode;
   private final String title;
+  private final boolean logException;
 
-  public ConstraintViolationHandler(@NonNull StatusCode statusCode, @NonNull String title) {
+  public ConstraintViolationHandler(
+      @NonNull StatusCode statusCode, @NonNull String title, boolean logException) {
     this.statusCode = statusCode;
     this.title = title;
+    this.logException = logException;
   }
 
   @Override
   public void apply(@NonNull Context ctx, @NonNull Throwable cause, @NonNull StatusCode code) {
     if (cause instanceof ConstraintViolationException ex) {
+      if (logException) {
+        log.error(ErrorHandler.errorMessage(ctx, code), cause);
+      }
       var violations = ex.violations();
 
       var groupedByPath = violations.stream().collect(groupingBy(ConstraintViolation::path));

modules/jooby-avaje-validator/src/main/java/module-info.java

@@ -11,4 +11,5 @@
   requires static com.github.spotbugs.annotations;
   requires typesafe.config;
   requires transitive io.avaje.validation;
+  requires org.slf4j;
 }

modules/jooby-avaje-validator/src/test/java/io/jooby/avaje/validator/app/App.java

@@ -8,9 +8,7 @@
 import io.jooby.Jooby;
 import io.jooby.StatusCode;
 import io.jooby.avaje.validator.AvajeValidatorModule;
-import io.jooby.avaje.validator.ConstraintViolationHandler;
 import io.jooby.jackson.JacksonModule;
-import jakarta.validation.ConstraintViolationException;
 
 public class App extends Jooby {
 
@@ -19,12 +17,8 @@ public class App extends Jooby {
 
   {
     install(new JacksonModule());
-    install(new AvajeValidatorModule());
+    install(new AvajeValidatorModule().validationTitle(DEFAULT_TITLE).statusCode(STATUS_CODE));
 
     mvc(new Controller());
-
-    error(
-        ConstraintViolationException.class,
-        new ConstraintViolationHandler(STATUS_CODE, DEFAULT_TITLE));
   }
 }

modules/jooby-hibernate-validator/src/main/java/io/jooby/hibernate/validator/ConstraintViolationHandler.java

@@ -13,6 +13,9 @@
 import java.util.List;
 import java.util.Map;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import edu.umd.cs.findbugs.annotations.NonNull;
 import io.jooby.Context;
 import io.jooby.ErrorHandler;
@@ -54,20 +57,25 @@
  * @since 3.3.1
  */
 public class ConstraintViolationHandler implements ErrorHandler {
-
   private static final String ROOT_VIOLATIONS_PATH = "";
-
+  private final Logger log = LoggerFactory.getLogger(ConstraintViolationHandler.class);
   private final StatusCode statusCode;
   private final String title;
+  private final boolean logException;
 
-  public ConstraintViolationHandler(@NonNull StatusCode statusCode, @NonNull String title) {
+  public ConstraintViolationHandler(
+      @NonNull StatusCode statusCode, @NonNull String title, boolean logException) {
     this.statusCode = statusCode;
     this.title = title;
+    this.logException = logException;
   }
 
   @Override
   public void apply(@NonNull Context ctx, @NonNull Throwable cause, @NonNull StatusCode code) {
     if (cause instanceof ConstraintViolationException ex) {
+      if (logException) {
+        log.error(ErrorHandler.errorMessage(ctx, code), cause);
+      }
       var violations = ex.getConstraintViolations();
 
       var groupedByPath =

modules/jooby-hibernate-validator/src/main/java/io/jooby/hibernate/validator/HibernateValidatorModule.java

@@ -54,6 +54,7 @@ public class HibernateValidatorModule implements Extension {
   private StatusCode statusCode = StatusCode.UNPROCESSABLE_ENTITY;
   private String title = "Validation failed";
   private boolean disableDefaultViolationHandler = false;
+  private boolean logException = false;
 
   /**
    * Setups a configurer callback.
@@ -79,6 +80,16 @@ public HibernateValidatorModule statusCode(@NonNull StatusCode statusCode) {
     return this;
   }
 
+  /**
+   * Ask the error handler to log the exception. Default is: false.
+   *
+   * @return This module.
+   */
+  public HibernateValidatorModule logException() {
+    this.logException = true;
+    return this;
+  }
+
   /**
    * Overrides the default title for the errors produced by validation. Default title is "Validation
    * failed"
@@ -129,7 +140,8 @@ public void install(@NonNull Jooby app) throws Exception {
 
       if (!disableDefaultViolationHandler) {
         app.error(
-            ConstraintViolationException.class, new ConstraintViolationHandler(statusCode, title));
+            ConstraintViolationException.class,
+            new ConstraintViolationHandler(statusCode, title, logException));
       }
     }
   }

modules/jooby-hibernate-validator/src/main/java/module-info.java

@@ -12,4 +12,5 @@
   requires typesafe.config;
   requires org.hibernate.validator;
   requires jakarta.validation;
+  requires org.slf4j;
 }

modules/jooby-hibernate-validator/src/test/java/io/jooby/hibernate/validator/app/App.java

@@ -7,10 +7,8 @@
 
 import io.jooby.Jooby;
 import io.jooby.StatusCode;
-import io.jooby.hibernate.validator.ConstraintViolationHandler;
 import io.jooby.hibernate.validator.HibernateValidatorModule;
 import io.jooby.jackson.JacksonModule;
-import jakarta.validation.ConstraintViolationException;
 
 public class App extends Jooby {
 
@@ -19,12 +17,8 @@ public class App extends Jooby {
 
   {
     install(new JacksonModule());
-    install(new HibernateValidatorModule());
+    install(new HibernateValidatorModule().validationTitle(DEFAULT_TITLE).statusCode(STATUS_CODE));
 
     mvc(new Controller());
-
-    error(
-        ConstraintViolationException.class,
-        new ConstraintViolationHandler(STATUS_CODE, DEFAULT_TITLE));
   }
 }