Java tutorial
/* * 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.druid.server.coordinator.rules; import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonProperty; import org.apache.druid.timeline.DataSegment; import org.joda.time.DateTime; import org.joda.time.Interval; import org.joda.time.Period; public class PeriodDropBeforeRule extends DropRule { private final Period period; @JsonCreator public PeriodDropBeforeRule(@JsonProperty("period") Period period) { this.period = period; } @Override @JsonProperty public String getType() { return "dropBeforeByPeriod"; } @JsonProperty public Period getPeriod() { return period; } @Override public boolean appliesTo(DataSegment segment, DateTime referenceTimestamp) { return appliesTo(segment.getInterval(), referenceTimestamp); } @Override public boolean appliesTo(Interval theInterval, DateTime referenceTimestamp) { final DateTime periodAgo = referenceTimestamp.minus(period); return theInterval.getEndMillis() <= periodAgo.getMillis(); } }