JAVA GWT - entity persistence approach

== IDENTITY ==
import java.io.Serializable;

public interface Identity<T extends Serializable> extends Serializable{
    T getId();
    void setId(T id);
}

JAVA Annotation - GWT impl of email validation on bean field

import javax.validation.Constraint;
import javax.validation.Payload;
import javax.validation.ReportAsSingleViolation;
import javax.validation.constraints.Pattern;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Replacement for the Hibernate Email constraint that is not supported by GWT.
 * <p/>
 */
@Documented
@Constraint(validatedBy = {})
@Pattern(regexp = "^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@([a-z0-9!#$%&'*+/=?^_`{|}~-]+(\\" +
        ".[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\])$", flags = Pattern
        .Flag.CASE_INSENSITIVE)
@ReportAsSingleViolation
@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER})
@Retention(RUNTIME)
public @interface Email {
    String message() default "{org.hibernate.validator.constraints.Email.message}";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    /**
     * Defines several {@code @Email} annotations on the same element.
     */
    @Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER})
    @Retention(RUNTIME)
    @Documented
    public @interface List {
        Email[] value();
    }
}

JAVA Annotation for phone number validation of bean field

==== USE OF ANNOTATION ON BEAN FIELD ====
   @Phone
    public String getPhone() {
        return phone;
    }

==== PHONE NUMBER VALIDATION CLASS ===
import javax.validation.Constraint;
import javax.validation.Payload;
import javax.validation.ReportAsSingleViolation;
import javax.validation.constraints.Pattern;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Created by baraole on 27/05/2015.
 */
@Documented
@Constraint(validatedBy = {})
@Pattern(regexp = "\\+?[0-9()]+")
@ReportAsSingleViolation
@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER})
@Retention(RUNTIME)
public @interface Phone {
    String message() default "not a well-formed phone number";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    /**
     * Defines several {@code @Phone} annotations on the same element.
     */
    @Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER})
    @Retention(RUNTIME)
    @Documented
    public @interface List {
        Phone[] value();
    }
}

JS frameworks comparision

http://habrahabr.ru/post/259311/

MongoDB - шпаргалка

http://habrahabr.ru/post/259219/

AngularJS - Combating AngularJS executing controller twice

AngularJS docs - ngController
Note that you can also attach controllers to the DOM by declaring it in a route definition via the $route service. A common mistake is to declare the controller again using ng-controller in the template itself. This will cause the controller to be attached and executed twice.

http://stackoverflow.com/questions/15535336/combating-angularjs-executing-controller-twice