coral.utils.WaitForFileThread.java Source code

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Here is the source code for coral.utils.WaitForFileThread.java

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/*
 *   Copyright 2009-2015 Markus Schaffner
 *
 *   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 coral.utils;

import java.io.File;
import java.util.HashSet;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import coral.service.ExpHandler;

public class WaitForFileThread extends Thread {

    protected final Log logger = LogFactory.getLog(this.getClass());

    private Set<Integer> clients = new HashSet<Integer>();
    private ExpHandler handler = null;

    private File file;

    public WaitForFileThread(ExpHandler handler, File file) {
        this.handler = handler;
        this.file = file;
    }

    @Override
    public void run() {

        logger.debug("start waiting for file " + file);
        try {
            while (!file.exists()) {
                Thread.sleep(20);
            }

            logger.debug("done waiting for file " + file);
            for (Integer i : clients) {
                handler.getService().process(i, "/?wait=_waited&_waitForFile=done");
            }

        } catch (InterruptedException e) {
            logger.error("error waiting for file " + file, e);

            for (Integer i : clients) {
                handler.getService().process(i, "/?wait=_waited&_waitForFile=failed");
            }
        }
    }

    public boolean add(Integer id) {
        return clients.add(id);
    }

}