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/*
 * Copyright © 2017 camunda services GmbH ([email protected])
 *
 * 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
 *
 *     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 io.zeebe.logstreams.impl.service;

import java.util.function.Function;

import io.zeebe.logstreams.impl.log.fs.FsLogStorage;
import io.zeebe.logstreams.impl.log.fs.FsLogStorageConfiguration;
import io.zeebe.logstreams.spi.LogStorage;
import io.zeebe.servicecontainer.*;
import io.zeebe.util.sched.ActorScheduler;

public class FsLogStorageService implements Service
{
    private final FsLogStorageConfiguration config;
    private final String topicName;
    private final int partitionId;
    private final Function logStorageStubber; // for testing only

    private FsLogStorage logStorage;

    public FsLogStorageService(FsLogStorageConfiguration config,
        String topicName,
        int partitionId,
        Function logStorageStubber)
    {
        this.config = config;
        this.topicName = topicName;
        this.partitionId = partitionId;
        this.logStorageStubber = logStorageStubber;
    }

    @Override
    public void start(ServiceStartContext startContext)
    {
        final ActorScheduler scheduler = startContext.getScheduler();
        logStorage = logStorageStubber.apply(new FsLogStorage(config, scheduler.getMetricsManager(), topicName, partitionId));

        startContext.run(logStorage::open);
    }

    @Override
    public void stop(ServiceStopContext stopContext)
    {
        stopContext.run(logStorage::close);
    }

    @Override
    public LogStorage get()
    {
        return logStorage;
    }
}