azkaban.project.CronSchedule.java Source code

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Here is the source code for azkaban.project.CronSchedule.java

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/*
 * Copyright 2017 LinkedIn Corp.
 *
 * 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 azkaban.project;

import com.google.common.base.Preconditions;
import java.io.Serializable;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;

/**
 * FlowTriggerSchedule is the logical representation of a cron-based schedule.
 * It couldn't be changed once gets constructed.
 * It will be used to schedule a trigger.
 */
public class CronSchedule implements Serializable {

    private static final long serialVersionUID = -1330280892166841227L;
    private final String cronExpression;

    /**
     * @throws IllegalArgumentException if cronExpression is null or blank
     */
    public CronSchedule(final String cronExpression) {
        Preconditions.checkArgument(StringUtils.isNotBlank(cronExpression));
        this.cronExpression = cronExpression;
        //todo chengren311: check cronExpression is valid: quartz has CronExpression.isValidExpression()
    }

    public String getCronExpression() {
        return this.cronExpression;
    }

    @Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }

        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        final CronSchedule that = (CronSchedule) o;

        return new EqualsBuilder().append(this.cronExpression, that.cronExpression).isEquals();
    }

    @Override
    public int hashCode() {
        return new HashCodeBuilder(17, 37).append(this.cronExpression).toHashCode();
    }
}