pl.allegro.tech.hermes.consumers.supervisor.ConsumersExecutorService Maven / Gradle / Ivy

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package pl.allegro.tech.hermes.consumers.supervisor;

import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import pl.allegro.tech.hermes.common.metric.MetricsFacade;
import pl.allegro.tech.hermes.consumers.supervisor.process.ConsumerProcess;

import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class ConsumersExecutorService {

    private static final Logger logger = LoggerFactory.getLogger(ConsumersExecutorService.class);
    private final ThreadPoolExecutor executor;

    public ConsumersExecutorService(int poolSize, MetricsFacade metrics) {
        ThreadFactory threadFactory = new ThreadFactoryBuilder()
            .setNameFormat("Consumer-%d")
            .setUncaughtExceptionHandler((t, e) -> logger.error("Exception from consumer with name {}", t.getName(), e)).build();

        executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(poolSize, threadFactory);

        metrics.consumer().registerConsumerProcessesThreadsGauge(executor, ThreadPoolExecutor::getActiveCount);
    }

    public Future execute(ConsumerProcess consumer) {
        return executor.submit(consumer);
    }

    public void shutdown() {
        executor.shutdownNow();
        try {
            executor.awaitTermination(1, TimeUnit.MINUTES);
        } catch (InterruptedException e) {
            logger.error("Termination of consumers executor service interrupted.", e);
        }
    }

}