Add a workflow task that uses JDBC

prebuilt-tasks/pom.xml

@@ -59,6 +59,10 @@
             <artifactId>jira-rest-java-client-core</artifactId>
             <version>${jira-rest-client.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-mail</artifactId>

prebuilt-tasks/src/main/java/com/redhat/parodos/tasks/jdbc/JdbcService.java

@@ -0,0 +1,14 @@
+package com.redhat.parodos.tasks.jdbc;
+
+import java.util.List;
+import java.util.Map;
+
+interface JdbcService {
+
+	List<Map<String, Object>> query(String url, String statement);
+
+	void update(String url, String statement);
+
+	void execute(String url, String statement);
+
+}

prebuilt-tasks/src/main/java/com/redhat/parodos/tasks/jdbc/JdbcServiceImpl.java

@@ -0,0 +1,34 @@
+package com.redhat.parodos.tasks.jdbc;
+
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.jdbc.core.ColumnMapRowMapper;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+
+class JdbcServiceImpl implements JdbcService {
+
+	@Override
+	public List<Map<String, Object>> query(String url, String statement) {
+		return createJdbcTemplate(url).query(statement, new ColumnMapRowMapper());
+	}
+
+	@Override
+	public void update(String url, String statement) {
+		createJdbcTemplate(url).update(statement);
+	}
+
+	@Override
+	public void execute(String url, String statement) {
+		createJdbcTemplate(url).execute(statement);
+	}
+
+	private JdbcTemplate createJdbcTemplate(String url) {
+		DriverManagerDataSource dataSource = new DriverManagerDataSource();
+		dataSource.setUrl(url);
+
+		return new JdbcTemplate(dataSource);
+	}
+
+}

prebuilt-tasks/src/main/java/com/redhat/parodos/tasks/jdbc/JdbcWorkFlowTask.java

@@ -0,0 +1,98 @@
+package com.redhat.parodos.tasks.jdbc;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.redhat.parodos.workflow.exception.MissingParameterException;
+import com.redhat.parodos.workflow.parameter.WorkParameter;
+import com.redhat.parodos.workflow.parameter.WorkParameterType;
+import com.redhat.parodos.workflow.task.BaseWorkFlowTask;
+import com.redhat.parodos.workflow.task.enums.WorkFlowTaskOutput;
+import com.redhat.parodos.workflows.work.DefaultWorkReport;
+import com.redhat.parodos.workflows.work.WorkContext;
+import com.redhat.parodos.workflows.work.WorkReport;
+import com.redhat.parodos.workflows.work.WorkStatus;
+import lombok.NonNull;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class JdbcWorkFlowTask extends BaseWorkFlowTask {
+
+	enum OperationType {
+
+		QUERY, UPDATE, EXECUTE
+
+	}
+
+	private JdbcService service;
+
+	public JdbcWorkFlowTask() {
+		this.service = new JdbcServiceImpl();
+	}
+
+	JdbcWorkFlowTask(String beanName, JdbcService service) {
+		this.setBeanName(beanName);
+		this.service = service;
+	}
+
+	@Override
+	public @NonNull List<WorkParameter> getWorkFlowTaskParameters() {
+		LinkedList<WorkParameter> params = new LinkedList<>();
+		params.add(WorkParameter.builder().key("url").type(WorkParameterType.TEXT).optional(false).description(
+				"JDBC URL. E.g. jdbc:postgresql://localhost:5432/service?user=service&password=service123&ssl=true&sslmode=verify-full")
+				.build());
+		params.add(WorkParameter.builder().key("operation").type(WorkParameterType.TEXT).optional(false).description(
+				"Type of operation this statement is performing. One of " + Arrays.toString(OperationType.values()))
+				.build());
+		params.add(WorkParameter.builder().key("statement").type(WorkParameterType.TEXT).optional(false)
+				.description("The database statement to execute. E.g. 'select * from table'").build());
+		params.add(WorkParameter.builder().key("result-ctx-key").type(WorkParameterType.TEXT).optional(true)
+				.description("In query operation the result is stored in WorkContext with the provided key").build());
+		return params;
+	}
+
+	@Override
+	public @NonNull List<WorkFlowTaskOutput> getWorkFlowTaskOutputs() {
+		return List.of(WorkFlowTaskOutput.OTHER);
+	}
+
+	@Override
+	public WorkReport execute(WorkContext workContext) {
+		String url = "";
+		try {
+			url = getRequiredParameterValue("url");
+			String operation = getRequiredParameterValue("operation");
+			String statement = getRequiredParameterValue("statement");
+			String resultCtxKey = getOptionalParameterValue("result-ctx-key", "");
+
+			OperationType operationType = OperationType.valueOf(operation.toUpperCase());
+
+			switch (operationType) {
+
+				case QUERY -> {
+					List<Map<String, Object>> result = this.service.query(url, statement);
+					if (!resultCtxKey.isEmpty()) {
+						workContext.put(resultCtxKey, new ObjectMapper().writeValueAsString(result));
+					}
+				}
+				case UPDATE -> {
+					this.service.update(url, statement);
+				}
+				case EXECUTE -> {
+					this.service.execute(url, statement);
+				}
+			}
+		}
+		catch (MissingParameterException | JsonProcessingException e) {
+			log.error("Jdbc task failed for URL " + url, e);
+			return new DefaultWorkReport(WorkStatus.FAILED, workContext, e);
+		}
+
+		return new DefaultWorkReport(WorkStatus.COMPLETED, workContext);
+	}
+
+}

prebuilt-tasks/src/main/java/com/redhat/parodos/tasks/jdbc/README.md

@@ -0,0 +1,22 @@
+# JDBC WorkFlow task
+
+## Motivation
+Provide a task that can be used for CRUD operations via JDBC
+
+## Input
+- URL - a JDBC URL that has all required connection properties. E.g. jdbc:postgresql://localhost:5432/service?user=service&password=service123&ssl=true&sslmode=verify-full.
+- Statement - the textual message/request/query that is passed to the JDBC driver. E.g. "select * from items".
+- Operation type - operations are divided into 3 types. Execute is for statements such as 'drop table', 'create user'. Update is for statements such as insert, update, delete records (e.g. rows in table). Query is for retrieving records/items/info. E.g. SQL select.
+- Context key for result - the context key where result of query operation is stored.
+
+## Result
+A failure to perform the operation will result in failed task execution. Only operation of type query returns a result. The result is stored with the context key that is passed as input. The result is a JSON representation of the result set.
+
+## Configuration
+The task uses the JDBC driver specified in the URL. E.g. mysql. In order to load the driver you need to add it as a maven dependency. E.g.
+```
+<dependency>
+    <groupId>mysql</groupId>
+    <artifactId>mysql-connector-java</artifactId>
+    <scope>runtime</scope>
+</dependency>

prebuilt-tasks/src/test/java/com/redhat/parodos/tasks/jdbc/JdbcWorkFlowTaskTest.java

@@ -0,0 +1,83 @@
+package com.redhat.parodos.tasks.jdbc;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.redhat.parodos.workflow.context.WorkContextDelegate;
+import com.redhat.parodos.workflow.exception.MissingParameterException;
+import com.redhat.parodos.workflows.work.WorkContext;
+import com.redhat.parodos.workflows.work.WorkReport;
+import com.redhat.parodos.workflows.work.WorkStatus;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+public class JdbcWorkFlowTaskTest {
+
+	private final JdbcService service = mock(JdbcService.class);
+
+	private final JdbcWorkFlowTask task = new JdbcWorkFlowTask("Test", service);
+
+	@Test
+	public void missingArgs() {
+		WorkContext ctx = createWorkContext(null);
+		task.preExecute(ctx);
+		WorkReport result = task.execute(ctx);
+		assertEquals(WorkStatus.FAILED, result.getStatus());
+		assertEquals(MissingParameterException.class, result.getError().getClass());
+	}
+
+	@Test
+	public void query() {
+		WorkContext ctx = createWorkContext(JdbcWorkFlowTask.OperationType.QUERY.name());
+		List<Map<String, Object>> resultSet = List.of(Map.of("name", "value"));
+		String resultJson = "[{\"name\":\"value\"}]";
+		doReturn(resultSet).when(service).query(any(), any());
+		task.preExecute(ctx);
+		WorkReport result = task.execute(ctx);
+		assertEquals(WorkStatus.COMPLETED, result.getStatus());
+		assertEquals(resultJson, ctx.get("thekey"));
+	}
+
+	@Test
+	public void update() {
+		WorkContext ctx = createWorkContext(JdbcWorkFlowTask.OperationType.UPDATE.name());
+		task.preExecute(ctx);
+		WorkReport result = task.execute(ctx);
+		assertEquals(WorkStatus.COMPLETED, result.getStatus());
+		verify(service, times(1)).update("theurl", "thestatement");
+	}
+
+	@Test
+	public void execute() {
+		WorkContext ctx = createWorkContext(JdbcWorkFlowTask.OperationType.EXECUTE.name());
+		task.preExecute(ctx);
+		WorkReport result = task.execute(ctx);
+		assertEquals(WorkStatus.COMPLETED, result.getStatus());
+		verify(service, times(1)).execute("theurl", "thestatement");
+	}
+
+	private WorkContext createWorkContext(String operation) {
+		WorkContext ctx = new WorkContext();
+		HashMap<String, String> map = new HashMap<>();
+		map.put("url", "theurl");
+
+		if (operation != null) {
+			map.put("operation", operation);
+		}
+
+		map.put("statement", "thestatement");
+		map.put("result-ctx-key", "thekey");
+
+		WorkContextDelegate.write(ctx, WorkContextDelegate.ProcessType.WORKFLOW_TASK_EXECUTION, task.getName(),
+				WorkContextDelegate.Resource.ARGUMENTS, map);
+		return ctx;
+	}
+
+}

workflow-examples/src/main/java/com/redhat/parodos/examples/JdbcWorkFlowConfiguration.java

@@ -0,0 +1,27 @@
+package com.redhat.parodos.examples;
+
+import com.redhat.parodos.tasks.jdbc.JdbcWorkFlowTask;
+import com.redhat.parodos.workflow.annotation.Infrastructure;
+import com.redhat.parodos.workflows.workflow.SequentialFlow;
+import com.redhat.parodos.workflows.workflow.WorkFlow;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+
+@Configuration
+@Profile("jdbc")
+public class JdbcWorkFlowConfiguration {
+
+	@Bean
+	JdbcWorkFlowTask jdbcTask() {
+		return new JdbcWorkFlowTask();
+	}
+
+	@Bean
+	@Infrastructure
+	WorkFlow jdbcWorkFlow(JdbcWorkFlowTask jdbcTask) {
+		return SequentialFlow.Builder.aNewSequentialFlow().named("jdbcWorkFlow").execute(jdbcTask).build();
+	}
+
+}