Copyright (c) 2016-present, RxJava Contributors.
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.
/**
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * 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.reactivex.internal.schedulers;

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

A ThreadFactory that counts how many threads have been created and given a prefix, sets the created Thread's name to prefix-count. /**
 * A ThreadFactory that counts how many threads have been created and given a prefix,
 * sets the created Thread's name to {@code prefix-count}.
 */
public final class RxThreadFactory extends AtomicLong implements ThreadFactory {

    private static final long serialVersionUID = -7789753024099756196L;

    final String prefix;

    final int priority;

    final boolean nonBlocking;

//    static volatile boolean CREATE_TRACE;

    public RxThreadFactory(String prefix) {
        this(prefix, Thread.NORM_PRIORITY, false);
    }

    public RxThreadFactory(String prefix, int priority) {
        this(prefix, priority, false);
    }

    public RxThreadFactory(String prefix, int priority, boolean nonBlocking) {
        this.prefix = prefix;
        this.priority = priority;
        this.nonBlocking = nonBlocking;
    }

    @Override
    public Thread newThread(Runnable r) {
        StringBuilder nameBuilder = new StringBuilder(prefix).append('-').append(incrementAndGet());

//        if (CREATE_TRACE) {
//            nameBuilder.append("\r\n");
//            for (StackTraceElement se :Thread.currentThread().getStackTrace()) {
//                String s = se.toString();
//                if (s.contains("sun.reflect.")) {
//                    continue;
//                }
//                if (s.contains("junit.runners.")) {
//                    continue;
//                }
//                if (s.contains("org.gradle.internal.")) {
//                    continue;
//                }
//                if (s.contains("java.util.concurrent.ThreadPoolExecutor")) {
//                    continue;
//                }
//                nameBuilder.append(s).append("\r\n");
//            }
//        }

        String name = nameBuilder.toString();
        Thread t = nonBlocking ? new RxCustomThread(r, name) : new Thread(r, name);
        t.setPriority(priority);
        t.setDaemon(true);
        return t;
    }

    @Override
    public String toString() {
        return "RxThreadFactory[" + prefix + "]";
    }

    static final class RxCustomThread extends Thread implements NonBlockingThread {
        RxCustomThread(Runnable run, String name) {
            super(run, name);
        }
    }
}