Provide better error message when executing a DbAction fails

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>org.springframework.data</groupId>
     <artifactId>spring-data-jdbc</artifactId>
-    <version>1.0.0.BUILD-SNAPSHOT</version>
+    <version>1.0.0.DATAJDBC-150-SNAPSHOT</version>
 
 	<name>Spring Data JDBC</name>
 	<description>Spring Data module for JDBC repositories.</description>

src/main/java/org/springframework/data/jdbc/core/conversion/DbAction.java

@@ -86,7 +86,26 @@ public static <T> DeleteAll<T> deleteAll(Class<T> type, JdbcPropertyPath propert
 		return new DeleteAll<>(type, propertyPath, dependingOn);
 	}
 
-	abstract void executeWith(Interpreter interpreter);
+	/**
+	 * Executing this DbAction with the given {@link Interpreter}.
+	 *
+	 * @param interpreter the {@link Interpreter} responsible for actually executing the {@link DbAction}.
+	 */
+	void executeWith(Interpreter interpreter) {
+
+		try {
+			doExecuteWith(interpreter);
+		} catch (Exception e) {
+			throw new DbActionExecutionException(this, e);
+		}
+	}
+
+	/**
+	 * Executing this DbAction with the given {@link Interpreter} without any exception handling.
+	 *
+	 * @param interpreter the {@link Interpreter} responsible for actually executing the {@link DbAction}.
+	 */
+	protected abstract void doExecuteWith(Interpreter interpreter);
 
 	/**
 	 * {@link InsertOrUpdate} must reference an entity.
@@ -113,7 +132,7 @@ private Insert(T entity, JdbcPropertyPath propertyPath, DbAction dependingOn) {
 		}
 
 		@Override
-		void executeWith(Interpreter interpreter) {
+		protected void doExecuteWith(Interpreter interpreter) {
 			interpreter.interpret(this);
 		}
 	}
@@ -130,7 +149,7 @@ private Update(T entity, JdbcPropertyPath propertyPath, DbAction dependingOn) {
 		}
 
 		@Override
-		void executeWith(Interpreter interpreter) {
+		protected void doExecuteWith(Interpreter interpreter) {
 			interpreter.interpret(this);
 		}
 	}
@@ -159,7 +178,7 @@ private Delete(Object rootId, Class<T> type, T entity, JdbcPropertyPath property
 		}
 
 		@Override
-		void executeWith(Interpreter interpreter) {
+		protected void doExecuteWith(Interpreter interpreter) {
 			interpreter.interpret(this);
 		}
 	}
@@ -176,7 +195,7 @@ private DeleteAll(Class<T> entityType, JdbcPropertyPath propertyPath, DbAction d
 		}
 
 		@Override
-		void executeWith(Interpreter interpreter) {
+		protected void doExecuteWith(Interpreter interpreter) {
 			interpreter.interpret(this);
 		}
 	}

src/main/java/org/springframework/data/jdbc/core/conversion/DbActionExecutionException.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.jdbc.core.conversion;
+
+/**
+ * Exception thrown when during the execution of a {@link DbAction} an exception gets thrown. Provides additional
+ * context information about the action and the entity.
+ *
+ * @author Jens Schauder
+ */
+public class DbActionExecutionException extends RuntimeException {
+	public DbActionExecutionException(DbAction<?> action, Throwable cause) {
+		super( //
+				String.format("Failed to execute %s for instance %s of type %s with path %s", //
+						action.getClass().getSimpleName(), //
+						action.getEntity(), //
+						action.getEntityType(), //
+						action.getPropertyPath().toDotPath() //
+				), //
+				cause);
+	}
+}

src/test/java/org/springframework/data/jdbc/core/conversion/DbActionUnitTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.jdbc.core.conversion;
+
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+
+import org.junit.Test;
+
+/**
+ * Unit tests for {@link DbAction}s
+ * 
+ * @author Jens Schauder
+ */
+public class DbActionUnitTests {
+
+	@Test // DATAJDBC-150
+	public void exceptionFromActionContainsUsefulInformationWhenInterpreterFails() {
+
+		DummyEntity entity = new DummyEntity();
+		DbAction.Insert<DummyEntity> insert = DbAction.insert(entity, JdbcPropertyPath.from("someName", DummyEntity.class),
+				null);
+
+		Interpreter failingInterpreter = mock(Interpreter.class);
+		doThrow(new RuntimeException()).when(failingInterpreter).interpret(any(DbAction.Insert.class));
+
+		assertThatExceptionOfType(DbActionExecutionException.class) //
+                .isThrownBy(() -> insert.executeWith(failingInterpreter)) //
+				.withMessageContaining("Insert") //
+                .withMessageContaining(entity.toString());
+
+	}
+
+	static class DummyEntity {
+		String someName;
+	}
+}