nvharikrishna commented on code in PR #231: URL: https://github.com/apache/cassandra-sidecar/pull/231#discussion_r2662539078
########## server/src/main/java/org/apache/cassandra/sidecar/job/RepairJob.java: ########## @@ -0,0 +1,380 @@ +/* + * 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.io.IOException; +import java.math.BigInteger; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.UUID; +import java.util.concurrent.atomic.AtomicInteger; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import io.vertx.core.Future; +import io.vertx.core.Promise; +import org.apache.cassandra.sidecar.adapters.base.RepairOptions; +import org.apache.cassandra.sidecar.common.data.OperationalJobStatus; +import org.apache.cassandra.sidecar.common.request.data.RepairPayload; +import org.apache.cassandra.sidecar.common.server.StorageOperations; +import org.apache.cassandra.sidecar.concurrent.TaskExecutorPool; +import org.apache.cassandra.sidecar.config.RepairJobsConfiguration; +import org.apache.cassandra.sidecar.handlers.data.RepairRequestParam; +import org.jetbrains.annotations.NotNull; + +/** + * Implementation of {@link OperationalJob} to perform repair operation. + * <p> + * Cassandra repair operations are asynchronous and can run for extended periods. When a repair is + * detected to be IN_PROGRESS, this job sets its status to RUNNING and completes its promise. + * <p> + * The job's status can be checked at any time using the {@link #status()} method, which directly + * queries the current repair status from Cassandra, regardless of whether the promise has been completed. + * <p> + * This design ensures timely responses to clients while allowing accurate status reporting for + * long-running repair operations. + */ +public class RepairJob extends OperationalJob +{ + private static final Logger LOGGER = LoggerFactory.getLogger(RepairJob.class); + private static final String OPERATION = "repair"; + private static final String PREVIEW_KIND_REPAIRED = "REPAIRED"; + + private final RepairRequestParam repairParams; + private final RepairJobsConfiguration config; + private final TaskExecutorPool internalPool; + protected StorageOperations storageOperations; + private volatile OperationalJobStatus currentStatus; + private volatile int commandId = -1; // Store the command ID for status checks + + /** + * Enum representing the status of a parent repair session + */ + public enum ParentRepairStatus + { + IN_PROGRESS, COMPLETED, FAILED + } + + /** + * Constructor for creation of RepairJob + * + * @param taskExecutorPool TaskExecutorPool instance (for testing) + * @param config Repair job configuration + * @param jobId UUID representing the Job to be created + * @param storageOps Reference to the storage operations interface + * @param repairParams Repair request parameters + */ + public RepairJob(TaskExecutorPool taskExecutorPool, + RepairJobsConfiguration config, + UUID jobId, + StorageOperations storageOps, + RepairRequestParam repairParams) + { + super(jobId); + this.internalPool = taskExecutorPool; + this.config = config; + this.storageOperations = storageOps; + this.repairParams = repairParams; + this.currentStatus = OperationalJobStatus.CREATED; + } + + /** + * {@inheritDoc} + * RepairJob allows parallel executions since multiple repairs can run concurrently + * on different tables or with different parameters. + */ + @Override + public boolean hasConflict(@NotNull List<OperationalJob> sameOperationJobs) + { + // For now, we simply allow all repair jobs to run in parallel + // A more sophisticated implementation could check the repair parameters + // against currently running repairs to detect potential conflicts + return false; + } + + @Override + protected Future<Void> executeInternal() + { + try + { + Map<String, String> options = generateRepairOptions(repairParams.requestPayload()); + String keyspace = repairParams.keyspace().name(); + + LOGGER.info("Executing repair operation for keyspace {} jobId={}", keyspace, this.jobId()); + + try + { + commandId = storageOperations.repair(keyspace, options); + } + catch (Exception e) + { + LOGGER.error("Failed to initiate repair for keyspace {} jobId={}", keyspace, this.jobId(), e); + currentStatus = OperationalJobStatus.FAILED; + return Future.failedFuture(e); + } + + if (commandId <= 0) + { + // When there are no relevant token ranges for the keyspace or RF is 1, the repair is inapplicable + LOGGER.info("Repair is not applicable for the provided options and keyspace '{}' jobId '{}'", keyspace, this.jobId()); + currentStatus = OperationalJobStatus.SUCCEEDED; + return Future.succeededFuture(); + } + + // Create promise only when we need it for periodic status checking + final Promise<Void> repairJobPromise = Promise.promise(); + int maxAttempts = config.repairStatusMaxAttempts(); + final AtomicInteger attemptCounter = new AtomicInteger(0); + + // Periodic timer that checks for a valid repair status for a specified no. attempts to make a best-effort attempt + // to validate that the repair has been kicked-off before returning. + internalPool.setPeriodic(0, config.repairPollInterval().toIntMillis(), id -> { + try + { + int currentAttempt = attemptCounter.incrementAndGet(); + if (currentAttempt > maxAttempts) + { + internalPool.cancelTimer(id); + String msg = String.format("Failed to obtain repair status after %d attempts.", maxAttempts); + LOGGER.warn(msg); + // Set status to RUNNING and complete the promise to ensure the job is properly handled Review Comment: ^ response deserves to go to the comment :) -- This is an automated message from the Apache Git Service. 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