ProcessCrawlerThread.java

package org.rapidoid.process;

/*
 * #%L
 * rapidoid-commons
 * %%
 * Copyright (C) 2014 - 2017 Nikolche Mihajlovski and 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.
 * #L%
 */

import org.rapidoid.activity.AbstractLoopThread;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.collection.Coll;

import java.util.Set;

@Authors("Nikolche Mihajlovski")
@Since("5.3.0")
public class ProcessCrawlerThread extends AbstractLoopThread {

	private final Set<ProcessHandle> handles;

	ProcessCrawlerThread(Set<ProcessHandle> handles) {
		super("process-crawler");
		setDaemon(true);

		this.handles = handles;
	}

	@Override
	protected void loop() {
		// use a copy because the handles set is synchronized
		for (ProcessHandle handle : Coll.copyOf(handles)) {
			visit(handle);
		}
	}

	private void visit(ProcessHandle handle) {
		if (!handle.isAlive() && handle.finishedAt() == null) {
			handle.onTerminated();
		}
	}

}