Whenever a Cache entry is expired, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryExpiredListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryEvent; import…… Continue reading Listening to Cache Entry Expired events
Listening to Cache Entry Update events
Whenever a Cache entry is updated, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryUpdatedListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryEvent; import…… Continue reading Listening to Cache Entry Update events
Listening to Cache Entry Removed events
Whenever a Cache entry is removed, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryRemovedListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryEvent; import…… Continue reading Listening to Cache Entry Removed events
Listening to Cache Entry Created events
Whenever a new Cache entry is created, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryCreatedListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryCreatedListener;…… Continue reading Listening to Cache Entry Created events
Bidirectional One to Many association mapping (without annotations)
In this post under Hibernate, I will explain how to create a bidirectional one to many association between objects using a mapping file with an example. For our example, we will create the below two tables. Data Definition Language CREATE TABLE `series2` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `name` VARCHAR(50) NOT NULL, `description` VARCHAR(100) NOT…… Continue reading Bidirectional One to Many association mapping (without annotations)
Unidirectional One to Many association mapping (without annotations)
In this post under Hibernate, I will explain how to create a unidirectional one to many association between objects using a mapping file with an example. For our example, we will create the below two tables. Data Definition Language CREATE TABLE `series1` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `name` VARCHAR(50) NOT NULL, `description` VARCHAR(100) NOT…… Continue reading Unidirectional One to Many association mapping (without annotations)
SuffixRecordSeparatorPolicy example
In this post under Spring Batch, I will explain the purpose and how to use SuffixRecordSeparatorPolicy class with an example. SuffixRecordSeparatorPolicy class is a concrete implementation of org.springframework.batch.item.file.separator.RecordSeparatorPolicy interface. In one of my previous post I have explained the purpose of RecordSeparatorPolicy and how to use it. For recap, RecordSeparatorPolicy interface is used to tell…… Continue reading SuffixRecordSeparatorPolicy example
JsonRecordSeparatorPolicy example
In this post under Spring Batch, I will explain the purpose and how to use JsonRecordSeparatorPolicy class with an example. JsonRecordSeparatorPolicy class is a concrete implementation of org.springframework.batch.item.file.separator.RecordSeparatorPolicy interface. In one of my previous post I have explained the purpose of RecordSeparatorPolicy and how to use it. For recap, RecordSeparatorPolicy interface is used to tell…… Continue reading JsonRecordSeparatorPolicy example
Deleting a persisted object
In this post under hibrenate, I will explain how to delete a persisted object. We can delete a persisted object using Session interface delete method. Below is the complete code Main Class 1 import org.hibernate.Session; 2 import org.hibernate.SessionFactory; 3 4 public class HibernateDemo9 { 5 public static void main(String[] args) { 6 SessionFactory sessionFactory =…… Continue reading Deleting a persisted object
Session’s load vs get method
In this post under hibernate, I will introduce you to Session’s load and get method and explain their difference. Similarity 1) Both methods are used to load persistent object from the database 2) Both needs primary key id as a parameter Difference 1) If the persistent object identified by primary key is not there, then…… Continue reading Session’s load vs get method
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