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/**
 * 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.pulsar.functions.windowing;

/**
 * Watermark event used for tracking progress of time when
 * processing event based ts.
 */
public class WaterMarkEvent extends EventImpl {

    public WaterMarkEvent(long ts) {
        super(null, ts, null);
    }

    @Override
    public boolean isWatermark() {
        return true;
    }

    @Override
    public String toString() {
        return "WaterMarkEvent{} " + super.toString();
    }
}