logo
down
shadow

How to implement spring separated by group singletons


How to implement spring separated by group singletons

By : user2950994
Date : November 17 2020, 11:58 AM
This might help you It can be implemented using custom scope. Create all objects of this scope while initialization and use it in proper way at runtime wiring of beans.
code :


Share : facebook icon twitter icon
how to implement a common behavior for regexp singletons in C#?

how to implement a common behavior for regexp singletons in C#?


By : mashhoodgee
Date : March 29 2020, 07:55 AM
should help you out I want to write a singleton to test regular expressions, every singleton has to have its own expression (a singleton for mail, a singleton for identificacion numbers etc.). , What about:
code :
public class RegExpTester
    {
        private readonly Regex engine;

        protected RegExpTester( string expression )

            if ( string.IsNullOrEmpty( expression ) )
            {
                throw new ArgumentException( "expression null or empty" );
            }
            engine = new Regex( expression );
        }

        public bool test( string strToBeTested )
        {
            return engine.IsMatch( strToBeTested );
        }
    }

    public sealed class emailTester : RegExpTester
    {
        static emailTester instance = new emailTester();

        emailTester() : base( "some mail expression" ) { }

        public static emailTester Instance
        {
            get
            {
                return instance;
            }
        }
    }
emailTester.Instance.test("some text");
Using enums to implement utility classes and singletons

Using enums to implement utility classes and singletons


By : Sergiy Povazhuk
Date : March 29 2020, 07:55 AM
seems to work fine I don't really agree with the first use of an enum from that post. If you want an uninstantiable utility class, just give it a private constructor. It's that simple, and the enum provides no added benefit in that situation that I see.
The use of enums for singletons in utility classes is great, but I would generally try to keep the fact that an enum is being used an internal implementation detail. See, for example, Guava's Predicates class which uses an enum to enforce a single instance of certain Predicates like alwaysTrue(). It does not expose the enum to users though.
How do I implement subclassable singletons?

How do I implement subclassable singletons?


By : Nithin Raj P
Date : March 29 2020, 07:55 AM
will help you Not sure why you think you need a singleton pattern here, but in any case, you should really be doing this in __new__.
code :
class Singleton(object):

    def __new__(cls):

        try:
            return cls._instance
        except AttributeError:
            cls._instance = object.__new__(cls)
            return cls._instance
Using MvvmCross IoC, How can I get a list of singletons that implement a common interface?

Using MvvmCross IoC, How can I get a list of singletons that implement a common interface?


By : Haobo Zhao
Date : March 29 2020, 07:55 AM
hope this fix your issue There's no Api for this in MvxSimpleIocContainer
However, you can easily implement this yourself reflection - simply use reflection to list all the repository-inheriting interfaces and then use Mvx.Resolve to retrieve the singletons which implement those interfaces.
How to implement ORDER BY from a Spring Data JPA GROUP BY query

How to implement ORDER BY from a Spring Data JPA GROUP BY query


By : Zion Joel Lomat
Date : March 29 2020, 07:55 AM
hop of those help? Based on question How to return a custom object from a Spring Data JPA GROUP BY query, my custom query is working, as follows: , Try this:
code :
@Entity
public class Goleador {
    //...
}

@Entity
public class PartidaJogador {
    //...

    @ManyToOne
    private Goleador jogador;

    private Long gols;

    //...
}

// DTO as Projection
public interface GoleadorWithGols {
    Goleador getGoleador();
    Long getTotalGols()
}

public interface GoleadorRepo extends JpaRepository<Goleador, Long> {
    @Query("select j as goleador, sum(pj.gols) as totalGols from PartidaJogador pj join pj.jogador j group by j order by totalGols")
    List<GoleadorWithGols> getGoleadores();
}
Related Posts Related Posts :
  • Why is it mandatory for ternary operations to return a value?
  • How can I make my listview rows different heights
  • Array declaration trick : Is it bad to use it?
  • Calling different classes with if else statements
  • Free API for speech recognition system
  • Java: Objects in JFrame are messed up
  • Is there a similar of MessageBox of ExtJS in ADF Faces
  • Passing HttpServletResponse in Spring Boot controller method
  • Failed to load libraries: [netty_tcnative_linux_arm_32, netty_tcnative_linux_arm_32_fedora, netty_tcnative_arm_32, netty
  • How to build a small documents storage?
  • Getting pixel position of a text in an image
  • How do I get a list of Methods called from a Class in Eclipse IDE?
  • Convert string to day of week (not exact date)
  • Unable to understand how rounding is working for decimal digits (Java)
  • How to avoid java.lang.NoSuchMethodError: org.apache.poi.util.IOUtils.copy(Ljava/io/InputStream;Ljava/io/OutputStream;)
  • JTable Renderer not working with RowSorter?
  • From java.util.concurrent.Future<T> to play.libs.F.Promise<T>: How to do that in Java?
  • jUnit tests work in Eclipse, but fail in ant - java.lang.RuntimeException: Stub
  • How do i add a tooltip to existing gwt Textbox?
  • actor replying to non-actor
  • Google Cloud Messaging - server connection
  • Which classes are unmodifiable and cannot be intrumented and is there a way to bypass it?
  • Java & Jersey 1.17: Custom default response headers
  • Java rounding error
  • Setting custom RejectedExecutionHandler for ThreadPoolExecutor after executing some tasks?
  • Arquillian test class variables lose value
  • java.util.ConcurrentModificationException while inserting in ArrayList
  • How to write generic Java API without method Overloading
  • Java Serialization / Deserialization of an ArrayList works only on first program execution
  • Conway's Game of Life's rules dont apply properly
  • call a java method when Click on a html button without using javascript
  • Why does SSLSocketFactory.createSocket returns a Socket instead of SSLSocket?
  • How to schedule a task in Tomcat
  • compare two pdf files (approach) using java
  • What is the use of allowCoreThreadTimeout( ) in ThreadPoolExecutor?
  • Describe the Strategy Design Pattern in Java?
  • MongoDB too many open connections
  • Issue with generate JAXB classes with value constructors
  • Moving from one frame to another in java swing
  • Get a thread by Id
  • how to open front camera and back camera at same time?
  • Messed up with Java Declaration
  • Extracting chart in EXcel as image using java
  • How to get latitude and longitude in Android phone?
  • Do GC pauses and kill -STOP produce the same behavior?
  • Android HTML.ImageGetter Images resized
  • The way to instantiate map<String, List<String>> in Java
  • Java Making objects move while buttons held
  • Androidx Navigation View - `setNavigationItemSelectedListener` Doesn't Work
  • after compiling code JFrame does not appear
  • Netbeans project, JFrames ran from the main JFrame close all JFrames in project
  • Square Retrofit Client: How to enable/disable followRedirects? How to intercept redirect URL?
  • Java Circular Reference - Can’t Compile
  • Mouse click on specific time JAVA
  • android 4 onCreateDialog return type incompatible when overriding
  • Java Implementation of Oracle's DBMS_UTILITY.GET_HASH_VALUE Function
  • javac cannot be run, and furthermore does not seem installed
  • Function to obtain a thread given its ID
  • Java File path to Executable has spaces
  • Minimum Oracle Java VM heap memory setting?
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org