Fix #2317: Override Pipeline tasks from client

catalog-rest-service/src/main/java/org/openmetadata/catalog/jdbi3/PipelineRepository.java

@@ -26,8 +26,6 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
 import org.jdbi.v3.sqlobject.transaction.Transaction;
 import org.openmetadata.catalog.Entity;
 import org.openmetadata.catalog.entity.data.Pipeline;
@@ -328,19 +326,20 @@ public class PipelineRepository extends EntityRepository<Pipeline> {
     }
 
     private void updateTasks(Pipeline origPipeline, Pipeline updatedPipeline) throws JsonProcessingException {
-      // Airflow lineage backend gets executed per task in a DAG. This means we will not a get full picture of the
+      // While the Airflow lineage only gets executed for one Task at a time, we will consider the
-      // pipeline in each call. Hence, we may create a pipeline and add a single task when one task finishes in a
+      // client Task information as the source of truth. This means that at each update, we will
-      // pipeline in the next task run we may have to update. To take care of this we will merge the tasks
+      // expect to receive all the tasks known until that point.
+
+      // The lineage backend will take care of controlling new & deleted tasks, while passing to the
+      // API the full list of Tasks to consider for a given Pipeline. Having a single point of control
+      // of the Tasks and their status, simplifies the logic on how to add/delete tasks.
+
+      // The API will only take care of marking tasks as added/updated/deleted based on the original
+      // and incoming changes.
+
       List<Task> updatedTasks = Optional.ofNullable(updatedPipeline.getTasks()).orElse(Collections.emptyList());
       List<Task> origTasks = Optional.ofNullable(origPipeline.getTasks()).orElse(Collections.emptyList());
 
-      // Merge the tasks
-      updatedTasks =
-          new ArrayList<>(
-              Stream.concat(origTasks.stream(), updatedTasks.stream())
-                  .collect(Collectors.groupingBy(Task::getName, Collectors.reducing(null, (t1, t2) -> t2)))
-                  .values());
-
       List<Task> added = new ArrayList<>();
       List<Task> deleted = new ArrayList<>();
       recordListChange("tasks", origTasks, updatedTasks, added, deleted, taskMatch);

catalog-rest-service/src/test/java/org/openmetadata/catalog/resources/pipelines/PipelineResourceTest.java

@@ -27,11 +27,14 @@ import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 import javax.ws.rs.client.WebTarget;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.http.client.HttpResponseException;
@@ -245,7 +248,32 @@ public class PipelineResourceTest extends EntityResourceTest<Pipeline, CreatePip
     Task taskEmptyDesc = new Task().withName("taskEmpty").withTaskUrl(new URI("http://localhost:0"));
     tasks.add(taskEmptyDesc);
     change.getFieldsAdded().add(new FieldChange().withName("tasks").withNewValue(tasks));
-    updateAndCheckEntity(request.withTasks(tasks), OK, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
+
+    // Create new request with all the Tasks
+    List<Task> updatedTasks = Stream.concat(TASKS.stream(), tasks.stream()).collect(Collectors.toList());
+    updateAndCheckEntity(request.withTasks(updatedTasks), OK, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
+  }
+
+  @Test
+  void put_PipelineTasksOverride_200(TestInfo test) throws IOException, URISyntaxException {
+    // A PUT operation with a new Task should override the current tasks in the Pipeline
+    // This change will always be minor, both with deletes/adds
+    CreatePipeline request = createRequest(test).withService(AIRFLOW_REFERENCE);
+    Pipeline pipeline = createAndCheckEntity(request, ADMIN_AUTH_HEADERS);
+
+    List<Task> newTask =
+        Collections.singletonList(
+            new Task()
+                .withName("newTask")
+                .withDescription("description")
+                .withDisplayName("displayName")
+                .withTaskUrl(new URI("http://localhost:0")));
+
+    ChangeDescription change = getChangeDescription(pipeline.getVersion());
+    change.getFieldsAdded().add(new FieldChange().withName("tasks").withNewValue(newTask));
+    change.getFieldsDeleted().add(new FieldChange().withName("tasks").withOldValue(TASKS));
+
+    updateAndCheckEntity(request.withTasks(newTask), OK, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
   }
 
   @Test
@@ -261,8 +289,11 @@ public class PipelineResourceTest extends EntityResourceTest<Pipeline, CreatePip
     tasks.add(taskEmptyDesc);
     change.getFieldsAdded().add(new FieldChange().withName("tasks").withNewValue(tasks));
     change.getFieldsAdded().add(new FieldChange().withName("description").withNewValue("newDescription"));
+
+    // Create new request with all the Tasks
+    List<Task> updatedTasks = Stream.concat(TASKS.stream(), tasks.stream()).collect(Collectors.toList());
+    pipeline.setTasks(updatedTasks);
     pipeline.setDescription("newDescription");
-    pipeline.setTasks(tasks);
     pipeline = patchEntityAndCheck(pipeline, origJson, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
 
     // add a description to an existing task
@@ -274,7 +305,9 @@ public class PipelineResourceTest extends EntityResourceTest<Pipeline, CreatePip
     change
         .getFieldsAdded()
         .add(new FieldChange().withName("tasks.taskEmpty.description").withNewValue("taskDescription"));
-    pipeline.setTasks(newTasks);
+
+    List<Task> updatedNewTasks = Stream.concat(TASKS.stream(), newTasks.stream()).collect(Collectors.toList());
+    pipeline.setTasks(updatedNewTasks);
     pipeline = patchEntityAndCheck(pipeline, origJson, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
 
     // update the descriptions of pipeline and task
@@ -293,7 +326,9 @@ public class PipelineResourceTest extends EntityResourceTest<Pipeline, CreatePip
     change
         .getFieldsUpdated()
         .add(new FieldChange().withName("description").withOldValue("newDescription").withNewValue("newDescription2"));
-    pipeline.setTasks(newTasks);
+
+    updatedNewTasks = Stream.concat(TASKS.stream(), newTasks.stream()).collect(Collectors.toList());
+    pipeline.setTasks(updatedNewTasks);
     pipeline.setDescription("newDescription2");
     pipeline = patchEntityAndCheck(pipeline, origJson, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
 
@@ -313,7 +348,9 @@ public class PipelineResourceTest extends EntityResourceTest<Pipeline, CreatePip
     change
         .getFieldsDeleted()
         .add(new FieldChange().withName("description").withOldValue("newDescription2").withNewValue(null));
-    pipeline.setTasks(newTasks);
+
+    updatedNewTasks = Stream.concat(TASKS.stream(), newTasks.stream()).collect(Collectors.toList());
+    pipeline.setTasks(updatedNewTasks);
     pipeline.setDescription(null);
     patchEntityAndCheck(pipeline, origJson, ADMIN_AUTH_HEADERS, MINOR_UPDATE, change);
   }

ingestion/setup.py

@@ -122,7 +122,7 @@ test = {
     "isort",
     "pre-commit",
     "pylint",
-    "pytest",
+    "pytest==6.2.5",
     "pytest-cov",
     "faker",
     "coverage",