IT Knowledge

Load an entity There are two forms to get an entity with the methods load()  or get(). public Category getCategory(Long catId) throws DataAccessException { return (Category) this.getSessionFactory().getCurrentSession() . load(Category.class, catId); } public Category getCategory(Long catId) throws DataAccessException { return (Category) this.getSessionFactory().getCurrentSession() . get(Category.class, catId); } The difference are: load() Throws an exception if there isn't any row. Has performane benefits. get() Return null  if there isn't any row. HibernateTemplate -  Using Parameters with  findByNamedParam In case of use only one parameter, you need the query, parameter name and the value . public List<ArtEntity> getArtworkInCategory(Long catId) throws DataAccessException { return this.getHibernateTemplate(). fi...

Implementation of the methods equals and hashCode. @Override public boolean equals(Object o) { if (this == o) return true; if (!(o instanceof Category)) return false; Category category = (Category) o; if (categoryName != null ? !categoryName.equals(category.categoryName) : category.categoryName != null) { return false; } else { return true; } } @Override public int hashCode() { return categoryName != null ? categoryName.hashCode() : 0; }

Hibernate annotations @Entity - To persist the class @Basic  - Customized the persistance as lazy mode or aspects @Transient  - Don't persist @Temporal  - To persist dates  Ex.  @Temporal(TemporalType.TIMESTAMP) @Table  - To use a different name from table Ex.  @Table(name = "HOGWASH") @Column  - To map a column with different name  @Column(name = "commentText") @Id  - Define attribute as primary key @GeneratedValue  - Use with @Id to create an identifier, by default AUTO. Ex  @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="COMMENT_ID_SEQ") to specify a different behavior @OneToMany - To establish the relation. Ex @OneToMany(orphanRemoval = true, cascade = { javax.persistence.CascadeType. ALL }) orphanRemoval - Delete any dereferenced javax.persistence.CascadeType - The eentity will be affected in any save/update @Cache - First try to find an instance in the cache, helpful for improve performance Ex. @Cac...

There are two way to declare the configuration file You can declare the file with the configuration in the tag <init-param>    <servlet>       <servlet-name>galleryDispatcher</servlet-name>       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>         <param-name>contextConfigLocation</param-name>         <param-value>                   /WEB-INF/spring/spring-master-web.xml               </param-value>       </init-param>       <load-on-startup>1</load-on-startup>     </servlet>  The second form is creating a file named  galleryDispatcher-servlet.xml in WEF-INF/.  In...

@Repository  annotation should be used to indicate those classes that compose the DAO layer. @Service  annotation can be used to designate those classes that are part of an application's service facade,  which are used in the web layer to handle requests @Controller  annotation denotes the presence of a POJO that should be used for Spring MVC interactions. D efines a service facade.

(application-context.xml) In your application-context.xml, use the tag  context:property-placeholder to define the property file where you have the values of your bean properties. The value of  location  is the rath of your file: <context:property-placeholder location ="classpath*:spring/*.properties" /> In case that you have your property file outside your project: <context:property-placeholder   location =" " file: ///var/conf/conf.properties"/> After define your file properties with the values: db.name = test db.user = user db.password = password db.port = 3306 Finally you can use the properties in your beans: <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/test" /> <property name="usern...

In Eclipse to add the structure folders choose New -> Soure Folder Select the chech box "Update exclusion filters into other source folders to solve nesting" Within the  project_name  folder, we'll create the folders that are customary for a Java application: project_name /src project_name /src/main project_name /src/main/java project_name /src/main/resources For web applications, we need a   webapp   and   WEB-INF   folder: project_name /src/main/webapp project_name /src/main/webapp/WEB-INF We also need to create the folders that are required for unit testing our application: project_name /src/test project_name /src/test/java project_name /src/test/resources And finally, we'll create the two folders where Spring configuration files are ordinarily placed: project_name /src/main/webapp/WEB-INF/spring

All the time we have new information and no time to learn everything so what I did was to learn how to read faster. What I learned was the next points previous to the lecture: About the material Where comes the information? How many time I need to spend? What is the relationship with me (job, hobbies)?? Is the material appropiate? What I want to read? Why I chose this material? What kind of information Am I expecting? Do I need to read everything? What the purpouse of the new information? The new information Would increase my knowledge? Previous to read What I am expecting to learn? Would it satisfied my initials expectations ? Would it be easy or difficult the lecture? Before read Your expectations were justified? Did you accomplish your expectations? Did you get a benefit, like save time or arise your knowledge? If you read the material for first time, would you change something?

For this example use Eclipse Juno, Drools 5.4.0 Install in Eclipse the drools plug-in  Help -> Install new Software  Typer in "Work with" http://download.jboss.org/drools/release/5.4.0.Final/org.drools.updatesite/.  That change according with the last version Click Add Type in "type filter text", Drools Select the chechbox  Click Finish Create the Drools Workspace  File -> Properties  Type "Drools"  In the window left side -> Configure workspace setting -> Add  Select from the uncompressed zip the folder \binaries, in my case "drools-distribution-5.4.0.Final\binaries" Click Ok to accept the changes Create a Drools Project to verify File -> New Project -> type "Drools" Create a Java class to invoke the rules Implement KnowledgeBuilder to parse the DRL files Implement KnowledgeBase to compare the object Vs rules Insert some object to evaluate the rules

Develop a project managment plan I write this as result of taking one Project course and the main points are: Establish the project duration Calendar configuration Before start writing the activities configure the calendars to manage the tiem that each team member is going to be have in the project Configure the labors hours and hollidays Option: Project -> Change work time -> Create calendar To manage globally the calendars and share between different projects Option: File->Information->Calendars->   Activity duration is different to the duration of the labor day Activities Define the block of activities  Select Format -> Schema number,  to list the activities Relation between activities Finish to Start Finish to Finish Start to Start Start to Finish Define Automatic or Manual dependency between activities Always work with tasks of the same level Milestone Used to define a point of control Define dependency between milestones Constraints All t...

The idea of this philosophy is just be focus on the solutions as goal, following the next steps: Solutions, not problems Detect what is working Take in mind what you want What do you want to accomplish today? Will you be aware if you've made progress? What works for you generally? Solution talk Inbetween-the action is in the interaction Do small changes Make use of what's there The solution is in front of you Everything is a useful thing Use of counters Possibilities - Past, Present, Future Past - There is a past victory or triumph.  Using a scale where 10 is perfect and 1 is nothing, where are you?? Then describe how you get from the 1 to 2, then from 3 to 4, etc until achieve the perfect future. Present - Focus and use the things that are working fine, develop a positive trend Future - Create the perfect future, how the perfect future is  Language Keep the language simple Every case is different There isn't a general solution Optimistic and pessimism

Que mejor manera de practicar ingles con música y las canciones que conoces. http://www.lyricstraining.com/ Todos queremos aprender ingles para mejorar en nuestras carreras pero primero debemos disfrutar de lo que hacemos.

Todo debe construirse desde las piedras y en Blogger se inicia con una cuenta de Gmail, acceder a  www.blogger.com   y dar clic en "Nuevo Blog". Después deberemos empezar a llenar las tres partes fundamentales del Blog. 1. Título. E s el nombre del Blog y es el primer elemento de identificación.  Sirve como primer punto para  captar la atención de los lectores, como:                * Asociaciones (Mexprocan)                            * P romoción de productos (Pequeño Cerdo Capitalista )                * S ervicios independientes (M atuk )                * Diversión (SSD Fanatico) Si desean hablar de varios temas les recomiendo mejor crear varios blogs, para una mejor administración del contenido que se traduce para los usuarios como un blog especia...

La intensión de este Blog es poder documentar y compartir el conocimiento que a través del tiempo se me ha atravesado en este Tao de IT.  Siempre dicen que es bueno leer pero he aprendido que se debe construir algo para que sea beneficioso ese conocimiento adquirido, ya que de otra manera solo se queda como un dato anecdótico sin mayor utilidad. En esta época es  fácil  encontrar demasiada información y lleva mas tiempo leer toda esa información. Así que por sugerencia, me agrado la idea crear este Blog para compartir los temas de mi interés y a la vez contribuir con mi experiencia. Los temas principalmente estarán enfocados a IT ,  Management  y  Finanzas   debido a mi carrera profesional como Ing. en Sistemas Cmputacionales .