{"id":1178,"date":"2020-12-16T10:50:24","date_gmt":"2020-12-16T10:50:24","guid":{"rendered":"https:\/\/blog.samarthya.me\/wps\/?p=1178"},"modified":"2020-12-16T10:50:25","modified_gmt":"2020-12-16T10:50:25","slug":"fortune-v1-0","status":"publish","type":"post","link":"https:\/\/blog.samarthya.me\/wps\/2020\/12\/16\/fortune-v1-0\/","title":{"rendered":"Fortune v1.0"},"content":{"rendered":"\n

In one of recent discussions with Mr. X<\/code> I was asked about my approach to solving the Linux cookie problem<\/p>\n\n\n\n

  1. A random quote <\/li>
  2. Repository will be a text file<\/li>
  3. Each quote will be segregated by a '%'<\/code><\/li>
  4. Can be multiline.<\/li><\/ol>\n\n\n\n

    I always believe in incremental steps so here is what I could think of<\/p>\n\n\n\n

    • Read the File for the DB<\/li>
    • Parse each line and merge or drop as required for '%<\/code>‘.<\/li>
    • randomization can be an external factor – but that is step 2.<\/li><\/ul>\n\n\n\n

      Read DB<\/h2>\n\n\n\n

      The final class looks like something below<\/p>\n\n\n\n

      public class FortuneTeller {\n    private final Logger logger = Logger.getLogger(FortuneTeller.class.getName());\n\n    private List<String> allData = new LinkedList<String>();\n\n    public FortuneTeller(File dbFile) {\n        this.dbFile = dbFile;\n    }\n\n    private File dbFile;\n\n    public FortuneTeller() {\n        this(null);\n        logger.log(Level.WARNING, \"empty initialization\");\n    }\n\n    public void populateDB() {\n        this.populateDB(this.dbFile);\n    }\n\n    \/**\n     * Read the complete data.\n     * @param localFile\n     *\/\n    public void populateDB(File localFile) {\n        if (localFile == null ){\n            throw new IllegalArgumentException(\"NO FILE SPECIFIED: file name is invalid\");\n        }\n\n        if ( localFile.exists()) {\n            System.out.println( \" File found \");\n            try {\n                \/**\n                 * https:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/nio\/file\/Files.html\n                 *\/\n                List<String> allLines = Files.readAllLines(localFile.toPath()).stream().collect(Collectors.toList());\n\n                StringBuffer sb = new StringBuffer();\n\n                for (String str: allLines) {\n\n                    if (str.compareTo(\"%\") != 0) {\n                        sb.append(str);\n\n                        if (allLines.indexOf(str) == allLines.size() - 1) {\n                            allData.add(sb.toString() +\"\\n\");\n                            break;\n                        } else {\n                            sb.append(\"\\n\");\n                            continue;\n                        }\n                    } else {\n                        allData.add(sb.toString());\n                        sb.setLength(0);\n                    }\n                }\n                return;\n            } catch (IOException e) {\n                throw new InternalError(\"something went wrong\");\n            }\n        } else {\n            System.out.println(\"file not found: \" + localFile.getPath());\n        }\n    }\n\n    public String myFortune(int index) {\n        if (allData.size() == 0) {\n            System.out.println(\"no data in the system\");\n            throw new InternalError(\"no data in the system\");\n        }\n        return allData.get(index%allData.size()).toString();\n    }\n}<\/code><\/pre>\n\n\n\n
      DB population: populateDB<\/code><\/h3>\n\n\n\n
      \n
      public void populateDB(File localFile) {\n        if (localFile == null ){\n            throw new IllegalArgumentException(\"NO FILE SPECIFIED: file name is invalid\");\n        }\n\n        if ( localFile.exists()) {\n            System.out.println( \" File found \");\n            try {\n                List<String> allLines = Files.readAllLines(localFile.toPath()).stream().collect(Collectors.toList());\n\n                StringBuffer sb = new StringBuffer();\n\n                for (String str: allLines) {\n\n                    if (str.compareTo(\"%\") != 0) {\n                        sb.append(str);\n\n                        if (allLines.indexOf(str) == allLines.size() - 1) {\n                            allData.add(sb.toString() +\"\\n\");\n                            break;\n                        } else {\n                            sb.append(\"\\n\");\n                            continue;\n                        }\n                    } else {\n                        allData.add(sb.toString());\n                        sb.setLength(0);\n                    }\n                }\n                return;\n            } catch (IOException e) {\n                throw new InternalError(\"something went wrong\");\n            }\n        } else {\n            System.out.println(\"file not found: \" + localFile.getPath());\n        }\n    }<\/code><\/pre>\n\n\n\n
      • If the file-argument is null Throw illegalArgumentException<\/code><\/li>
      • Read all the files ‘no explicit` skipping<\/li><\/ul>\n\n\n\n
        Files.readAllLines(localFile.toPath()).stream().collect(Collectors.toList());<\/code><\/pre>\n\n\n\n
        Once the Lines are read – time to parse each line and<\/p>\n\n\n\n
        • Drop all ‘%<\/code>‘<\/li>
        • All lines terminated by ‘%<\/code>‘ will be joined by a new line character.<\/li><\/ul>\n\n\n\n
          for (String str: allLines) {\n\n    if (str.compareTo(\"%\") != 0) {\n        sb.append(str);\n\n        if (allLines.indexOf(str) == allLines.size() - 1) {\n            allData.add(sb.toString() + \"\\n\");\n            break;\n        } else {\n            sb.append(\"\\n\");\n            continue;\n        }\n    } else {\n        allData.add(sb.toString());\n        sb.setLength(0);\n    }\n}<\/code><\/pre>\n\n\n\n
          Iterate through all the Lines read, and if the line is not just ‘%<\/code>‘ we can append the next line.<\/p>\n<\/div><\/div>\n\n\n\n
          At the end of the loop we will have allData<\/code> populated with all the contents.<\/p>\n\n\n\n
          public String myFortune(int index) {\n        if (allData.size() == 0) {\n            System.out.println(\"no data in the system\");\n            throw new InternalError(\"no data in the system\");\n        }\n        return allData.get(index % allData.size()).toString();\n}<\/code><\/pre>\n\n\n\n
          Fortune.DB<\/h3>\n\n\n\n
          My life is simple\n%\nLife is easier when you have the right set of people around you,\nas friends and family to help you enjoy the moment.\n   - Saurabh\n%\nS\n%\nLife is never that simple<\/code><\/pre>\n\n\n\n
          Test – JUNIT<\/h2>\n\n\n\n
          public class FortuneTellerTest {\n\n    private final FortuneTeller ft = new FortuneTeller();\n\n    @Test\n    void testFT() {\n        IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, () -> ft.populateDB(null));\n        assertEquals(ex.getMessage(), \"NO FILE SPECIFIED: file name is invalid\");\n    }\n\n    @Test\n    void readLocal() {\n        ft.populateDB(new File(\"\/Users\/ss670121\/sourcebox\/learn\/golang\/exercism\/java\/MissingNumber\/src\/test\/resources\/fortune.txt\"));\n        assertEquals(ft.myFortune(0), \"My life is simple\\n\");\n        assertEquals(ft.myFortune(1), \"Life is easier when you have the right set of people around you,\\n\" +\n                \"as friends and family to help you enjoy the moment.\\n\" +\n                \"   - Saurabh\\n\");\n        assertEquals(ft.myFortune(2), \"S\\n\");\n        assertEquals(ft.myFortune(3), \"Life is never that simple\\n\");\n    }\n\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
          In one of recent discussions with Mr. X I was asked about my approach to solving the Linux cookie problem A random quote Repository will be a text file Each quote will be segregated by a ‘%’ Can be multiline. I always believe in incremental steps so here is what I could think of Read […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[120,34],"tags":[129,121,130],"class_list":["post-1178","post","type-post","status-publish","format-image","hentry","category-java","category-technical","tag-fortune","tag-java","tag-query","post_format-post-format-image"],"_links":{"self":[{"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/posts\/1178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/comments?post=1178"}],"version-history":[{"count":0,"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/posts\/1178\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/media?parent=1178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/categories?post=1178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.samarthya.me\/wps\/wp-json\/wp\/v2\/tags?post=1178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}