arjunashok commented on code in PR #139: URL: https://github.com/apache/cassandra-sidecar/pull/139#discussion_r1831813747
########## server/src/main/java/org/apache/cassandra/sidecar/job/JobManager.java: ########## @@ -0,0 +1,102 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.apache.cassandra.sidecar.job; + +import java.util.List; +import java.util.UUID; +import java.util.function.Supplier; +import java.util.stream.Collectors; + +import javax.inject.Inject; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.inject.Singleton; +import org.apache.cassandra.sidecar.common.utils.JobResult.JobStatus; +import org.apache.cassandra.sidecar.concurrent.ExecutorPools; + +/** + * An abstraction of the management and tracking of long-running jobs running on the sidecar. + */ +@Singleton +public class JobManager +{ + private static final Logger LOGGER = LoggerFactory.getLogger(JobManager.class); + + private final JobTracker jobTracker; + private final ExecutorPools executorPools; + + /** + * Creates a manager instance with a default sized job-tracker. + * @param executorPools + */ + @Inject + public JobManager(ExecutorPools executorPools) + { + this.executorPools = executorPools; + jobTracker = new JobTracker(64); + } + + /** + * Fetches the inflight jobs being tracked on the sidecar + * @return instances of the jobs that are in pending or running states + */ + public List<Job> allInflightJobs() + { + return jobTracker.getJobsView().values() + .stream() + .filter(j -> j.status() == JobStatus.Pending || j.status() == JobStatus.Running) + .collect(Collectors.toList()); + } + + /** + * Fetch the job using its UUID + * @param jobId identifier of the job + * @return instance of the job or null + */ + public Job getJobIfExists(UUID jobId) + { + return jobTracker.get(jobId); + } + + /** + * Asynchronously submit (and lazily create, via the supplier) the job, if it is not currently being + * tracked and is not running downstream. The job is triggered on a separate internal thread-pool. + * The job execution failure behavior is tracked within the {@link Job}. + * @param jobId job identifier + * @param jobSupplier supplier used to create an instance of the job + * @return the instance of the job that is either being tracked or was just submitted + */ + public Job trySubmitJob(UUID jobId, Supplier<Job> jobSupplier) + { + + return jobTracker.computeIfAbsent(jobId, id -> { + Job job = jobSupplier.get(); + LOGGER.info("Created job with ID: {}, operation: {}", job.jobId(), job.operation()); + jobTracker.put(job.jobId(), job); Review Comment: yep redundant, removed. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
