one job per source (#817)

core/src/main/java/feast/core/dao/JobRepository.java

@@ -41,5 +41,5 @@ public interface JobRepository extends JpaRepository<Job, String> {
   List<Job> findByFeatureSetJobStatusesIn(List<FeatureSetJobStatus> featureSetsJobStatuses);
 
   // find jobs by feast store name
-  List<Job> findByStoreName(String storeName);
+  List<Job> findByStoresName(String storeName);
 }

core/src/main/java/feast/core/job/CreateJobTask.java

@@ -0,0 +1,84 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2018-2020 The Feast 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
+ *
+ *     https://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 feast.core.job;
+
+import feast.core.log.Action;
+import feast.core.model.Job;
+import feast.core.model.JobStatus;
+import feast.core.model.Source;
+import java.time.Instant;
+import java.util.Objects;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Task that starts recently created {@link Job} by using {@link JobManager}. Since it's new job its
+ * Id being generated from attached {@link Source} and updated accordingly in-place.
+ */
+@Getter
+@Setter
+@Builder(setterPrefix = "set")
+public class CreateJobTask implements JobTask {
+  final Logger log = LoggerFactory.getLogger(CreateJobTask.class);
+
+  private Job job;
+  private JobManager jobManager;
+
+  @Override
+  public Job call() {
+    String jobId = createJobId(job.getSource());
+    String runnerName = jobManager.getRunnerType().toString();
+
+    job.setRunner(jobManager.getRunnerType());
+    job.setStatus(JobStatus.PENDING);
+    job.setId(jobId);
+
+    try {
+      JobTask.logAudit(Action.SUBMIT, job, "Building graph and submitting to %s", runnerName);
+
+      job = jobManager.startJob(job);
+      var extId = job.getExtId();
+      if (extId.isEmpty()) {
+        throw new RuntimeException(
+            String.format("Could not submit job: \n%s", "unable to retrieve job external id"));
+      }
+
+      var auditMessage = "Job submitted to runner %s with ext id %s.";
+      JobTask.logAudit(Action.STATUS_CHANGE, job, auditMessage, runnerName, extId);
+
+      return job;
+    } catch (Exception e) {
+      log.error(e.getMessage());
+      var auditMessage = "Job failed to be submitted to runner %s. Job status changed to ERROR.";
+      JobTask.logAudit(Action.STATUS_CHANGE, job, auditMessage, runnerName);
+
+      job.setStatus(JobStatus.ERROR);
+      return job;
+    }
+  }
+
+  String createJobId(Source source) {
+    String dateSuffix = String.valueOf(Instant.now().toEpochMilli());
+    String jobId =
+        String.format(
+            "%s-%d-%s", source.getTypeString(), Objects.hashCode(source.getConfig()), dateSuffix);
+    return jobId.replaceAll("_store", "-").toLowerCase();
+  }
+}

core/src/main/java/feast/core/job/JobTask.java

@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2018-2020 The Feast 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
+ *
+ *     https://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 feast.core.job;
+
+import feast.core.log.Action;
+import feast.core.log.AuditLogger;
+import feast.core.log.Resource;
+import feast.core.model.Job;
+import java.util.concurrent.Callable;
+
+public interface JobTask extends Callable<Job> {
+  static void logAudit(Action action, Job job, String detail, Object... args) {
+    AuditLogger.log(Resource.JOB, job.getId(), action, detail, args);
+  }
+
+  @Override
+  Job call() throws RuntimeException;
+}