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Making a POJO Thread Safe


Making a POJO Thread Safe

By : hukam chand
Date : November 28 2020, 04:01 AM
I wish this helpful for you
First of all, set() is not a compound action. So, why do we need to synchronise it?
code :


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Making datasets thread safe in C#

Making datasets thread safe in C#


By : user1766497
Date : March 29 2020, 07:55 AM
help you fix your problem "Implement a wrapper layer with locks" is the way to go.
The wrapper layer will likely use locking that is specific to the way your application uses the DataSets.
Making SimpleDateFormat thread safe

Making SimpleDateFormat thread safe


By : Keifak
Date : March 29 2020, 07:55 AM
will help you tl;dr
Rather than using strings, use java.time objects (LocalDate specifically) exchanged with your database via JDBC 4.2 or later.
code :
myResultSet.getObject(      // Exchange modern java.time objects with your database.
    "START_DATE" ,
    LocalDate.class 
)                           // Returns a `LocalDate` object.
.format(                    // Generate a `String` representing textually the content of this `LocalDate`. 
    DateTimeFormatter.ofPattern( "dd-MMM-uuuu" , Locale.US )
)
myPreparedStatement.setObject( … , myLocalDate ) ;
LocalDate myLocalDate = myResultSet.getObject( … , LocalDate.class ) ;
public class Trade {
    private LocalDate startDate ;
    private LocalDate endDate ;
    … 

    // Getters
    public LocalDate getStartDate() { 
        return this.startDate ;
    }
    public LocalDate getEndDate() { 
        return this.endDate;
    }
    public Period getPeriod() {  // Number of years-months-days elapsed.
        return Period.between( this.startDate , this.endDate ) ;
    }

    // Setters
    public void setStartDate( LocalDate startDateArg ) { 
        this.startDate = startDateArg ;
    }
    public void setEndDate( LocalDate endDateArg ) { 
        this.endDate = endDateArg ;
    }

    @Override
    public toString() {
        "Trade={ " + "startDate=" + this.startDate.toString() …
    }
…
}
LocalDate ld = LocalDate.parse( "2018-01-23" ) ; // January 23, 2018.
String s = ld.toString() ;  // Outputs 2018-01-23. 
Locale l = Locale.CANADA_FRENCH ; 
DateTimeFormatter f = 
    DateTimeFormatter.ofLocalizedDate( FormatStyle.FULL )
                     .withLocale( l ) ;
String output = ld.format( f ) ;
Making a function thread safe: Thread-specific data vs mutex

Making a function thread safe: Thread-specific data vs mutex


By : user3531197
Date : March 29 2020, 07:55 AM
should help you out
I think I can make the thread-unsafe strerror() to a thead-safe one, simply adding a mutex.
Making a non-thread safe queue thread safe

Making a non-thread safe queue thread safe


By : Jatinder Paras
Date : March 29 2020, 07:55 AM
may help you . If your queue implements Collection, you can simply use a Collections.synchronizedCollection(queue);. Otherwise I suggest you checked the code of synchronizedCollection and did something similar (essentially: guarding all operations on the queue by a mutex on this).
Note that it will still require the users to properly access the synchronized queue, for example during iteration.
How to check whether a POJO's fields are 100% thread safe?

How to check whether a POJO's fields are 100% thread safe?


By : Nico
Date : March 29 2020, 07:55 AM
will be helpful for those in need A POJO can't be thread safe. A POJO is just data, and thread safety is not a property of data alone: Thread safety is a property of the methods that access the data. And note, when I say "methods" I mean the entire set of methods. One method can't be thread safe if another one is not.
Thread safety is all about protecting invariants. An invariant is a boolean test that you can run against the data that must always be true. An example would be, if your program was a Monopoly game, then the total amount of cash in the bank and in all of the player's hands must always add up to the same fixed amount.
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