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/*
 * 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.flink.runtime.scheduler;

import org.apache.flink.api.common.JobStatus;
import org.apache.flink.configuration.CheckpointingOptions;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.JobManagerOptions;
import org.apache.flink.core.failure.FailureEnricher;
import org.apache.flink.runtime.blob.BlobWriter;
import org.apache.flink.runtime.blocklist.BlocklistOperations;
import org.apache.flink.runtime.checkpoint.CheckpointRecoveryFactory;
import org.apache.flink.runtime.checkpoint.CheckpointsCleaner;
import org.apache.flink.runtime.concurrent.ComponentMainThreadExecutor;
import org.apache.flink.runtime.executiongraph.JobStatusListener;
import org.apache.flink.runtime.executiongraph.failover.FailoverStrategyFactoryLoader;
import org.apache.flink.runtime.executiongraph.failover.RestartBackoffTimeStrategy;
import org.apache.flink.runtime.executiongraph.failover.RestartBackoffTimeStrategyFactoryLoader;
import org.apache.flink.runtime.io.network.partition.JobMasterPartitionTracker;
import org.apache.flink.runtime.jobgraph.JobGraph;
import org.apache.flink.runtime.jobmaster.ExecutionDeploymentTracker;
import org.apache.flink.runtime.jobmaster.slotpool.SlotPool;
import org.apache.flink.runtime.jobmaster.slotpool.SlotPoolService;
import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
import org.apache.flink.runtime.rpc.FatalErrorHandler;
import org.apache.flink.runtime.shuffle.ShuffleMaster;
import org.apache.flink.util.concurrent.ScheduledExecutorServiceAdapter;

import org.slf4j.Logger;

import java.time.Duration;
import java.util.Collection;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledExecutorService;

import static org.apache.flink.runtime.scheduler.DefaultSchedulerComponents.createSchedulerComponents;
import static org.apache.flink.runtime.scheduler.SchedulerBase.computeVertexParallelismStore;

/** Factory for {@link DefaultScheduler}. */
public class DefaultSchedulerFactory implements SchedulerNGFactory {

    @Override
    public SchedulerNG createInstance(
            final Logger log,
            final JobGraph jobGraph,
            final Executor ioExecutor,
            final Configuration jobMasterConfiguration,
            final SlotPoolService slotPoolService,
            final ScheduledExecutorService futureExecutor,
            final ClassLoader userCodeLoader,
            final CheckpointRecoveryFactory checkpointRecoveryFactory,
            final Duration rpcTimeout,
            final BlobWriter blobWriter,
            final JobManagerJobMetricGroup jobManagerJobMetricGroup,
            final Duration slotRequestTimeout,
            final ShuffleMaster shuffleMaster,
            final JobMasterPartitionTracker partitionTracker,
            final ExecutionDeploymentTracker executionDeploymentTracker,
            long initializationTimestamp,
            final ComponentMainThreadExecutor mainThreadExecutor,
            final FatalErrorHandler fatalErrorHandler,
            final JobStatusListener jobStatusListener,
            final Collection failureEnrichers,
            final BlocklistOperations blocklistOperations)
            throws Exception {

        final SlotPool slotPool =
                slotPoolService
                        .castInto(SlotPool.class)
                        .orElseThrow(
                                () ->
                                        new IllegalStateException(
                                                "The DefaultScheduler requires a SlotPool."));

        final DefaultSchedulerComponents schedulerComponents =
                createSchedulerComponents(
                        jobGraph.getJobType(),
                        jobGraph.isApproximateLocalRecoveryEnabled(),
                        jobMasterConfiguration,
                        slotPool,
                        slotRequestTimeout);
        final RestartBackoffTimeStrategy restartBackoffTimeStrategy =
                RestartBackoffTimeStrategyFactoryLoader.createRestartBackoffTimeStrategyFactory(
                                jobGraph.getJobConfiguration(),
                                jobMasterConfiguration,
                                jobGraph.isCheckpointingEnabled())
                        .create();
        log.info(
                "Using restart back off time strategy {} for {} ({}).",
                restartBackoffTimeStrategy,
                jobGraph.getName(),
                jobGraph.getJobID());

        final ExecutionGraphFactory executionGraphFactory =
                new DefaultExecutionGraphFactory(
                        jobMasterConfiguration,
                        userCodeLoader,
                        executionDeploymentTracker,
                        futureExecutor,
                        ioExecutor,
                        rpcTimeout,
                        jobManagerJobMetricGroup,
                        blobWriter,
                        shuffleMaster,
                        partitionTracker);

        final CheckpointsCleaner checkpointsCleaner =
                new CheckpointsCleaner(
                        jobMasterConfiguration.get(CheckpointingOptions.CLEANER_PARALLEL_MODE));

        return new DefaultScheduler(
                log,
                jobGraph,
                ioExecutor,
                jobMasterConfiguration,
                schedulerComponents.getStartUpAction(),
                new ScheduledExecutorServiceAdapter(futureExecutor),
                userCodeLoader,
                checkpointsCleaner,
                checkpointRecoveryFactory,
                jobManagerJobMetricGroup,
                schedulerComponents.getSchedulingStrategyFactory(),
                FailoverStrategyFactoryLoader.loadFailoverStrategyFactory(jobMasterConfiguration),
                restartBackoffTimeStrategy,
                new DefaultExecutionOperations(),
                new ExecutionVertexVersioner(),
                schedulerComponents.getAllocatorFactory(),
                initializationTimestamp,
                mainThreadExecutor,
                (jobId, jobStatus, timestamp) -> {
                    if (jobStatus == JobStatus.RESTARTING) {
                        slotPool.setIsJobRestarting(true);
                    } else {
                        slotPool.setIsJobRestarting(false);
                    }
                    jobStatusListener.jobStatusChanges(jobId, jobStatus, timestamp);
                },
                failureEnrichers,
                executionGraphFactory,
                shuffleMaster,
                rpcTimeout,
                computeVertexParallelismStore(jobGraph),
                new DefaultExecutionDeployer.Factory());
    }

    @Override
    public JobManagerOptions.SchedulerType getSchedulerType() {
        return JobManagerOptions.SchedulerType.Default;
    }
}