Github user meiercaleb commented on a diff in the pull request: https://github.com/apache/incubator-rya/pull/177#discussion_r128042579 --- Diff: extras/rya.periodic.service/periodic.service.notification/src/main/java/org/apache/rya/periodic/notification/notification/PeriodicNotification.java --- @@ -0,0 +1,185 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 org.apache.rya.periodic.notification.notification; + +import java.util.Objects; +import java.util.concurrent.TimeUnit; + +import org.apache.rya.periodic.notification.api.Notification; + +import com.google.common.base.Preconditions; + +/** + * Notification Object used by the Periodic Query Service to inform workers to + * process results for a given Periodic Query with the indicated id. + * Additionally, this Object contains a period that indicates a frequency at + * which regular updates are generated. + * + */ +public class PeriodicNotification implements Notification { + + private String id; + private long period; + private TimeUnit periodTimeUnit; + private long initialDelay; + + /** + * Creates a PeriodicNotification. + * @param id - Fluo Query Id that this notification is associated with + * @param period - period at which notifications are generated + * @param periodTimeUnit - time unit associated with the period and delay + * @param initialDelay - amount of time to wait before generating the first notification + */ + public PeriodicNotification(String id, long period, TimeUnit periodTimeUnit, long initialDelay) { + Preconditions.checkNotNull(id); + Preconditions.checkNotNull(periodTimeUnit); + Preconditions.checkArgument(period > 0 && initialDelay >= 0); + this.id = id; + this.period = period; + this.periodTimeUnit = periodTimeUnit; + this.initialDelay = initialDelay; + } + + + /** + * Create a PeriodicNotification + * @param other - other PeriodicNotification used in copy constructor + */ + public PeriodicNotification(PeriodicNotification other) { + this(other.id, other.period, other.periodTimeUnit, other.initialDelay); + } + + public String getId() { + return id; + } + + /** + * @return - period at which regular notifications are generated + */ + public long getPeriod() { + return period; + } + + /** + * @return time unit of period and initial delay + */ + public TimeUnit getTimeUnit() { + return periodTimeUnit; + } + + /** + * @return amount of time to delay before beginning to generate notifications + */ + public long getInitialDelay() { + return initialDelay; + } + + @Override + public String toString() { + StringBuilder builder = new StringBuilder(); + String delim = "="; + String delim2 = ";"; + return builder.append("id").append(delim).append(id).append(delim2).append("period").append(delim).append(period).append(delim2) + .append("periodTimeUnit").append(delim).append(periodTimeUnit).append(delim2).append("initialDelay").append(delim) + .append(initialDelay).toString(); + } + + @Override + public boolean equals(Object other) { + if (this == other) { + return true; + } + + if (!(other instanceof PeriodicNotification)) { + return false; + } + + PeriodicNotification notification = (PeriodicNotification) other; + return Objects.equals(this.id, notification.id) && (this.period == notification.period) + && Objects.equals(this.periodTimeUnit, notification.periodTimeUnit) && (this.initialDelay == notification.initialDelay); + } + + @Override + public int hashCode() { + int result = 17; --- End diff -- done
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