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package org.mule.example.bookstore; |
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import org.mule.example.bookstore.web.HtmlTemplate; |
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import java.util.HashMap; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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22 | 0 | public class DataWarehouse |
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{ |
24 | 0 | int booksOrdered = 0; |
25 | 0 | double totalRevenue = 0; |
26 | 0 | double averagePrice = 0; |
27 | 0 | Map <String, Integer> sales = new HashMap <String, Integer> (); |
28 | 0 | String bestSeller = ""; |
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public String updateStats(Order order) |
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{ |
32 | 0 | Book book = order.getBook(); |
33 | 0 | booksOrdered += order.getQuantity(); |
34 | 0 | totalRevenue += (book.getPrice() * order.getQuantity()); |
35 | 0 | averagePrice = totalRevenue / booksOrdered; |
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37 | 0 | String title = book.getTitle(); |
38 | 0 | Integer quantity = sales.get(title); |
39 | 0 | if (quantity == null) |
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{ |
41 | 0 | sales.put(title, order.getQuantity()); |
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} |
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else |
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{ |
45 | 0 | sales.put(title, quantity + order.getQuantity()); |
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} |
47 | 0 | bestSeller = getBestSeller(); |
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49 | 0 | System.out.println("Updating stats"); |
50 | 0 | return HtmlTemplate.wrapHtmlBody(printHtmlStats()); |
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} |
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protected String getBestSeller() |
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{ |
55 | 0 | String title = ""; |
56 | 0 | int quantity = 0; |
57 | 0 | for (Entry<String, Integer> entry : sales.entrySet()) |
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{ |
59 | 0 | if (entry.getValue() > quantity) |
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{ |
61 | 0 | title = entry.getKey(); |
62 | 0 | quantity = entry.getValue(); |
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} |
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} |
65 | 0 | return title; |
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} |
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protected String printHtmlStats() |
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{ |
70 | 0 | StringBuilder sb = new StringBuilder(); |
71 | 0 | sb.append("<h2>Data Warehouse Statistics</h2>"); |
72 | 0 | sb.append("<table>"); |
73 | 0 | sb.append(" <tr><th>Books sold</th> <td>").append(booksOrdered).append("</td></tr>"); |
74 | 0 | sb.append(String.format(" <tr><th>Total revenue</th> <td>$%.2f</td></tr>", totalRevenue)); |
75 | 0 | sb.append(String.format(" <tr><th>Average price</th> <td>$%.2f</td></tr>", averagePrice)); |
76 | 0 | sb.append("<tr><th>Best seller</th> <td>").append(bestSeller).append("</td></tr>"); |
77 | 0 | sb.append("</table>"); |
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79 | 0 | return sb.toString(); |
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} |
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} |