com.lithium.flow.config.repos.ParallelRepo.java Source code

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Here is the source code for com.lithium.flow.config.repos.ParallelRepo.java

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/*
 * Copyright 2015 Lithium Technologies, Inc.
 *
 * 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 com.lithium.flow.config.repos;

import com.lithium.flow.config.Config;
import com.lithium.flow.config.Repo;
import com.lithium.flow.util.LogExecutorService;

import java.io.IOException;
import java.util.List;

import javax.annotation.Nonnull;

import com.google.common.collect.Lists;

/**
 * @author Matt Ayres
 */
public class ParallelRepo extends DecoratedRepo {
    private final int threads;

    public ParallelRepo(@Nonnull Repo delegate, @Nonnull Config config) {
        super(delegate);
        threads = config.getInt("threads", Runtime.getRuntime().availableProcessors() / 2);
    }

    @Override
    @Nonnull
    public List<Config> getConfigs() throws IOException {
        List<Config> configs = Lists.newCopyOnWriteArrayList();
        LogExecutorService service = new LogExecutorService(threads);
        getNames().forEach(name -> service.execute(name, () -> configs.add(getConfig(name))));
        service.finish();
        return configs;
    }
}