| /* |
| * 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.flink.walkthrough.common.source; |
| |
| import org.apache.flink.walkthrough.common.entity.Transaction; |
| |
| import java.io.Serializable; |
| import java.sql.Timestamp; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** An iterator of transaction events. */ |
| final class TransactionIterator implements Iterator<Transaction>, Serializable { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private static final Timestamp INITIAL_TIMESTAMP = Timestamp.valueOf("2019-01-01 00:00:00"); |
| |
| private static final long SIX_MINUTES = 6 * 60 * 1000; |
| |
| private final boolean bounded; |
| |
| private int index = 0; |
| |
| private long timestamp; |
| |
| static TransactionIterator bounded() { |
| return new TransactionIterator(true); |
| } |
| |
| static TransactionIterator unbounded() { |
| return new TransactionIterator(false); |
| } |
| |
| private TransactionIterator(boolean bounded) { |
| this.bounded = bounded; |
| this.timestamp = INITIAL_TIMESTAMP.getTime(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| if (index < data.size()) { |
| return true; |
| } else if (!bounded) { |
| index = 0; |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public Transaction next() { |
| Transaction transaction = data.get(index++); |
| transaction.setTimestamp(timestamp); |
| timestamp += SIX_MINUTES; |
| return transaction; |
| } |
| |
| private static List<Transaction> data = |
| Arrays.asList( |
| new Transaction(1, 0L, 188.23), |
| new Transaction(2, 0L, 374.79), |
| new Transaction(3, 0L, 112.15), |
| new Transaction(4, 0L, 478.75), |
| new Transaction(5, 0L, 208.85), |
| new Transaction(1, 0L, 379.64), |
| new Transaction(2, 0L, 351.44), |
| new Transaction(3, 0L, 320.75), |
| new Transaction(4, 0L, 259.42), |
| new Transaction(5, 0L, 273.44), |
| new Transaction(1, 0L, 267.25), |
| new Transaction(2, 0L, 397.15), |
| new Transaction(3, 0L, 0.219), |
| new Transaction(4, 0L, 231.94), |
| new Transaction(5, 0L, 384.73), |
| new Transaction(1, 0L, 419.62), |
| new Transaction(2, 0L, 412.91), |
| new Transaction(3, 0L, 0.77), |
| new Transaction(4, 0L, 22.10), |
| new Transaction(5, 0L, 377.54), |
| new Transaction(1, 0L, 375.44), |
| new Transaction(2, 0L, 230.18), |
| new Transaction(3, 0L, 0.80), |
| new Transaction(4, 0L, 350.89), |
| new Transaction(5, 0L, 127.55), |
| new Transaction(1, 0L, 483.91), |
| new Transaction(2, 0L, 228.22), |
| new Transaction(3, 0L, 871.15), |
| new Transaction(4, 0L, 64.19), |
| new Transaction(5, 0L, 79.43), |
| new Transaction(1, 0L, 56.12), |
| new Transaction(2, 0L, 256.48), |
| new Transaction(3, 0L, 148.16), |
| new Transaction(4, 0L, 199.95), |
| new Transaction(5, 0L, 252.37), |
| new Transaction(1, 0L, 274.73), |
| new Transaction(2, 0L, 473.54), |
| new Transaction(3, 0L, 119.92), |
| new Transaction(4, 0L, 323.59), |
| new Transaction(5, 0L, 353.16), |
| new Transaction(1, 0L, 211.90), |
| new Transaction(2, 0L, 280.93), |
| new Transaction(3, 0L, 347.89), |
| new Transaction(4, 0L, 459.86), |
| new Transaction(5, 0L, 82.31), |
| new Transaction(1, 0L, 373.26), |
| new Transaction(2, 0L, 479.83), |
| new Transaction(3, 0L, 454.25), |
| new Transaction(4, 0L, 83.64), |
| new Transaction(5, 0L, 292.44)); |
| } |