org.opencastproject.kernel.scanner.AbstractBufferScanner.java Source code

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Here is the source code for org.opencastproject.kernel.scanner.AbstractBufferScanner.java

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/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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 org.opencastproject.kernel.scanner;

import org.opencastproject.util.Log;

import org.apache.commons.lang.BooleanUtils;
import org.apache.commons.lang.StringUtils;
import org.osgi.service.cm.ConfigurationException;
import org.quartz.CronExpression;
import org.slf4j.LoggerFactory;

import java.util.Dictionary;

public abstract class AbstractBufferScanner extends AbstractScanner {
    private static final Log logger = new Log(LoggerFactory.getLogger(AbstractBufferScanner.class));

    /** The key that will be used to find the amount of buffer time to search for scheduled recordings to remove before now. */
    protected static final String PARAM_KEY_BUFFER = "buffer";

    protected long buffer = -1;

    @SuppressWarnings("rawtypes")
    public void updated(Dictionary properties) throws ConfigurationException {
        String cronExpression;
        boolean enabled;

        unschedule();

        if (properties != null) {
            logger.debug("Updating configuration...");

            enabled = BooleanUtils.toBoolean((String) properties.get(PARAM_KEY_ENABLED));
            setEnabled(enabled);
            logger.debug("enabled = " + enabled);

            cronExpression = (String) properties.get(PARAM_KEY_CRON_EXPR);
            if (StringUtils.isBlank(cronExpression) || !CronExpression.isValidExpression(cronExpression))
                throw new ConfigurationException(PARAM_KEY_CRON_EXPR, "Cron expression must be valid");
            setCronExpression(cronExpression);
            logger.debug("cronExpression = '" + cronExpression + "'");

            try {
                buffer = Long.valueOf((String) properties.get(PARAM_KEY_BUFFER));
                if (buffer < 0) {
                    throw new ConfigurationException(PARAM_KEY_BUFFER, "Buffer must be 0 or greater");
                }
            } catch (NumberFormatException e) {
                throw new ConfigurationException(PARAM_KEY_BUFFER, "Buffer must be a valid integer", e);
            }
            logger.debug("buffer = " + buffer);
        }

        schedule();
    }

    public long getBuffer() {
        return buffer;
    }

    public void setBuffer(long buffer) {
        this.buffer = buffer;
    }
}