com.azure.cosmos.implementation.directconnectivity.rntbd.RntbdThreadFactory Maven / Gradle / Ivy

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This Package contains Microsoft Azure Cosmos SDK (with Reactive Extension Reactor support) for Azure Cosmos DB SQL API

There is a newer version: 4.61.1

package com.azure.cosmos.implementation.directconnectivity.rntbd;

import io.netty.util.HashedWheelTimer;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

import static com.azure.cosmos.implementation.guava27.Strings.lenientFormat;

/**
 * A factory for creating daemon threads.
 * 
 * The default factory used by a {@link HashedWheelTimer} creates a user thread.
 */
class RntbdThreadFactory implements ThreadFactory {

    private static final String NAME_TEMPLATE = "cosmos-rntbd-%s[%s]";
    private final boolean daemon;
    private final String name;
    private final int priority;
    private final ThreadGroup threadGroup;
    private final AtomicInteger threadCount;

    RntbdThreadFactory(final String name, final boolean daemon, final int priority) {

        final SecurityManager securityManager = System.getSecurityManager();

        this.threadGroup = securityManager != null
            ? securityManager.getThreadGroup()
            : Thread.currentThread().getThreadGroup();

        this.daemon = daemon;
        this.name = name;
        this.priority = priority;
        this.threadCount = new AtomicInteger();
    }

    @Override
    public Thread newThread(final Runnable runnable) {

        final String name = lenientFormat(NAME_TEMPLATE, this.name, this.threadCount.incrementAndGet());
        final Thread thread = new Thread(this.threadGroup, runnable, name, 0);

        if (thread.isDaemon() != this.daemon) {
            thread.setDaemon(this.daemon);
        }

        if (thread.getPriority() != this.priority) {
            thread.setPriority(this.priority);
        }

        return thread;
    }
}