Strait Fram Singapuur

• [AngularJS] - HTML enhanced for web apps!
• [Spring Boot] - Awesome boot framework
• [Spring Data] - We are using JPA repository
• [Spring Security] - Just for basic authentication
• [HSQL] - Embedded database.
• [Ng Material] - Material Design components for Angular 2
• [Rest Assured] - Testing and validating REST services

listen=9306:mysql41
mysql_version_string=5.0.37

Class.forName("com.mysql.jdbc.Driver");
con = DriverManager
 .getConnection("jdbc:mysql://localhost:9306");
statement = con.createStatement();
// perform wild search on last names
resultSet = statement
 .executeQuery("select * from addressBookIndex 
where MATCH ('gogna | sharma')"); 

• 1. The attributes specified in the sphinx.conf file (e.g. sql_attr_string, sql_attr_uint etc) can not be used with MATCH though they can be part of WHERE clause.
• 2. Given that now String attributes are supported in order to avoid making a database call define key columns as attributes as well as fields in sql_query.
• 3. Results from Delta Indexes can be handled using union.
• 4. Explore RT indexes for real time update scenarios.

package com.gognamunish.test;

import org.apache.velocity.app.Velocity;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;

import java.io.File;
import java.io.FileWriter;
import java.io.StringWriter;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CSVFeedGeneration {

  static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");

  static DataFeed dataFeed;
 static {
  // prepare some static data
  dataFeed = new DataFeed();
  List<Map<String, Object>> dataList = new ArrayList<Map<String, Object>>();
  Map<String, Object> data = new HashMap<String, Object>();
  data.put("TransactionId", 1);
  data.put("Amount", new Integer(2312));
  data.put("Currency", "SGD");
  data.put("ExecutionDate", dateFormat.format(new Date()));
  dataList.add(data);
  data = new HashMap<String, Object>();
  data.put("TransactionId", 2);
  data.put("Amount", new Integer(1212));
  data.put("Currency", "INR");
  data.put("ExecutionDate", dateFormat.format(new Date()));
  data.put("Status", "Active");
  dataList.add(data);

   dataFeed.getFeedData().add(dataList);

  }

  public static void main(String[] args) throws Exception {
  VelocityContext context = new VelocityContext();
  FileWriter writer = new FileWriter(new File("feed.csv"));
  
  // inject the objects to be used in template
  context.put("feed", dataFeed);
  context.put("DELIMETER", ",");
  context.put("NEWLINE", "\n");

  Velocity.init();
  Template template = Velocity.getTemplate("csvfeed.vm");
  template.merge(context, writer);
  writer.flush();
  writer.close();

  }

}

TransactionId${DELIMETER}Amount${DELIMETER}ExecutionDate ${DELIMETER}Currency${DELIMETER}Status$NEWLINE
#foreach( $rowSet in $feed.feedData)
#foreach( $row in $rowSet )
$!row.get("TransactionId")$DELIMETER$!row.get("Amount") $DELIMETER$!row.get("ExecutionDate")$DELIMETER $!row.get("Currency")$DELIMETER$!row.get("Status")$NEWLINE
#end
#end

TransactionId,Amount,ExecutionDate,Currency,Status
1,2312,2013-08-18T14:29:35,SGD,
2,1212,2013-08-18T14:29:35,INR,Active

<dependency>
   <groupId>org.apache.velocity</groupId>
   <artifactId>velocity</artifactId>
   <version>1.7</version>
  </dependency>

 
  org.hibernate.ejb.HibernatePersistence
  com.gognamunish.test.Entity
  
   
   
   
   
   
  
 

• The database dialect we have chosen is MySQL for obvious reasons.
• Persistence unit has name test_unit and the type is RESOURCE_LOCAL and not JTA.
• com.gognamunish.test.Entity is the entity which we want to test later.
• As we are running without a JNDI available datasource, we must specify JDBC connections with Hibernate specific properties

EntityManagerFactory factory ;
factory = Persistence.createEntityManagerFactory("test_unit");
EntityManager manager = factory.createEntityManager();

/* Sample Entity class */
@javax.persistence.Entity
@Table(name = "Entity")
public class Entity {
 @Id
 private Long id;
 @Column
 private String value;
}

package com.gognamunish.test;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

/**
 * Sample Test - nothing fancy.
 * 
 * @author Munish Gogna
 * 
 */
public class LocalEntityManager {
 static EntityManager manager;
 static {
  EntityManagerFactory factory = Persistence
    .createEntityManagerFactory("test_unit");
  manager = factory.createEntityManager();
 }

 public static void main(String[] args) {

  System.out.println("Before Entities: " + getEntities());

  manager.getTransaction().begin();
  Entity entity = new Entity();
  entity.setId(1l);
  entity.setValue("my first value");
  saveOrUpdate(entity);
  manager.getTransaction().commit();

  System.out.println("After Entities: " + getEntities());

 }

 private static Entity saveOrUpdate(Entity entity) {
  return manager.merge(entity);
 }

 @SuppressWarnings("unchecked")
 private static List<Entity> getEntities() {
  return manager.createQuery("from Entity").getResultList();
 }
}

import java.util.Stack;
public class StringReverse {

 public static String reverse1(String s) {
  int length = s.length();
  if (length <= 1)
   return s;
  String left = s.substring(0, length / 2);
  String right = s.substring(length / 2, length);
  return reverse1(right) + reverse1(left);
 }

 public static String reverse2(String s) {
  int length = s.length();
  String reverse = "";
  for (int i = 0; i < length; i++)
   reverse = s.charAt(i) + reverse;
  return reverse;
 }

 public static String reverse3(String s) {
  char[] array = s.toCharArray();
  String reverse = "";
  for (int i = array.length - 1; i >= 0; i--)
   reverse += array[i];

  return reverse;
 }

 public static String reverse4(String s) {
  return new StringBuffer(s).reverse().toString();
 }

 public static String reverse5(String orig) {
  char[] s = orig.toCharArray();
  int n = s.length - 1;
  int halfLength = n / 2;
  for (int i = 0; i <= halfLength; i++) {
   char temp = s[i];
   s[i] = s[n - i];
   s[n - i] = temp;
  }
  return new String(s);
 }

 public static String reverse6(String s) {

  char[] str = s.toCharArray();

  int begin = 0;
  int end = s.length() - 1;

  while (begin < end) {
   str[begin] = (char) (str[begin] ^ str[end]);
   str[end] = (char) (str[begin] ^ str[end]);
   str[begin] = (char) (str[end] ^ str[begin]);
   begin++;
   end--;
  }

  return new String(str);
 }

 public static String reverse7(String s) {
  char[] str = s.toCharArray();
  Stack<Character> stack = new Stack<Character>();
  for (int i = 0; i < str.length; i++)
   stack.push(str[i]);

  String reversed = "";
  for (int i = 0; i < str.length; i++)
   reversed += stack.pop();

  return reversed;
 }

}

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.PdfCopyFields;
import com.lowagie.text.pdf.PdfReader;

/**
 * Merges the PDF files while retaining the fillable forms within them. It also
 * renames form field (to avoid conflicts) which can have an impact if form is
 * submitted to server but for printing purpose should be OK.
 * 
 * @author Munish Gogna
 * 
 */
public class PDFMerge {
 private static int counter = 0;

 public static void merge(List<InputStream> sourcePDFs,
   OutputStream targetPDF) throws Exception {
  if (sourcePDFs != null && targetPDF != null) {
   PdfCopyFields copy = new PdfCopyFields(targetPDF);

   for (InputStream stream : sourcePDFs) {
    PdfReader pdfReader = new PdfReader(stream);
    renameFields(pdfReader.getAcroFields());
    copy.addDocument(pdfReader);
    stream.close();
   }
   copy.close();
  }
 }

 private static void renameFields(AcroFields fields) {
  Set<String> fieldNames = fields.getFields().keySet();
  String prepend = String.format("_%d.", counter++);

  for (String fieldName : fieldNames) {
   fields.renameField(fieldName, prepend + fieldName);
  }
 }

 public static void main(String[] args) {
  try {
   List<InputStream> pdfs = new ArrayList<InputStream>();
   pdfs
     .add(new URL(
       "http://thewebjockeys.com/TheWebJockeys/Fillable_PDF_Sample_from_TheWebJockeys_vC5.pdf")
       .openStream());
   pdfs
     .add(new URL(
       "http://help.adobe.com/en_US/Acrobat/9.0/Samples/interactiveform_enabled.pdf")
       .openStream());
   OutputStream output = new FileOutputStream("merged.pdf");

   merge(pdfs, output);

  } catch (Exception e) {
   e.printStackTrace();
  }
 }

}

package com.gognamunish.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.pdfbox.util.PDFMergerUtility;

/**
 * Merges pdf files into one final pdf.
 * 
 * @author Munish Gogna
 */
public class PDFMerge {

 public static void main(String[] args) throws Exception {
  // Get the byte streams from any source (maintain order)
  List<InputStream> sourcePDFs = new ArrayList<InputStream>();
  sourcePDFs.add(new FileInputStream(new File("pdf1.pdf")));
  sourcePDFs.add(new FileInputStream(new File("pdf2.pdf")));
  sourcePDFs.add(new FileInputStream(new File("pdf3.pdf")));

  // initialize the Merger utility and add pdfs to be merged
  PDFMergerUtility mergerUtility = new PDFMergerUtility();
  mergerUtility.addSources(sourcePDFs);
  // set the destination pdf name and merge input pdfs
  mergerUtility.setDestinationFileName("merged.pdf");
  mergerUtility.mergeDocuments();
 }
}

• java.util.Timer
  
• EJB Timers
  
• Unix Cron jobs
  
• Quartz Scheduler
  
• Custom Timer
  

package com.gognamunish.test;
import org.jboss.varia.scheduler.Schedulable;
/**
* Implement Schedulable interface and override perform() function. 
* @author Munish Gogna
*/
public class HelloWorld implements Schedulable
{
    public void perform( Date now, long remainingRepetitions ) {
        System.out.println("Hello World");
    }
}

      true
      com.gognamunish.test.HelloWorld
      0
      30000
      -1
      true    

      
   

Singapore,Test
 java.lang.String,java.lang.String

public HelloWorld (String location, String environment){
 this.location=location;
 this.environment=environment;
}