Skip to main content

Autowire

Autowiring
==============================================================\
When we declare a class as bean as part of spring bean configuration file,then IOC containe will not managed the dependency between the classes,until we have to provide the dependency between those classes.
     But we dont want to manually provide the dependency rather we have to instruct the IOC to detect the dependenct and managed the injection.
<bean id="motor" class="com.di.Motor" autowire="byName"> </bean>


-> Configuring beans and their dependency is nothing but wiring.
-> There are two types of wiring. 1. Explicit wiring, and 2. Autowiring(Implicit wiring).
-> Autowiring feature of Spring f/w enables us to inject the object dependency implicitly.
-> It internally uses setter or constructor injection.
-> It requires the less code because we don't need to write the code to inject the dependency explicitly.
-> Autowiring can't be used to inject premitive and string values. It works with reference only.
-> There is no control of programmer. This is disadvantage of autowiring.
->There are many autowiring modes.
1. byName
2. byType
3. constructor
4. autodetect
5. no

Example:        <bean id="motor" class="com.di.Motor" autowire="byName"> </bean>

Comments

Post a Comment

Popular posts from this blog

Mockito interview Questions

1.       Question 1. What Is Mockito? Answer : Mockito allows creation of mock object for the purpose of Test Driven Development and Behavior Driven development. Unlike creating actual object, Mockito allows creation of fake object (external dependencies) which allows it to give consistent results to a given invocation. 2.       Question 2. Why Do We Need Mockito? What Are The Advantages? Answer : Mockito differentiates itself from the other testing framework by removing the expectation beforehand. So, by doing this, it reduces the coupling. Most of the testing framework works on the "expect-run-verify". Mockito allows it to make it "run-verify" framework. Mockito also provides annotation which allows to reduce the boilerplate code. 3.       Question 3. Can You Explain A Mockito Framework? Answer : In Mockito, you always check a particular class. The dependency in that class is injected using m...
2 comments
Read more

REST Methods

GET ============================================= HTTP GET method is used to **read** (or retrieve) a representation of a resource. According to the design of the HTTP specification, GET requests are used only to read data and not change it. Therefore, when used this way, they are considered safe. That is, they can be called without risk of data modification or corruption. Means calling it once has the same effect as calling it 10 times. Additionally, GET is idempotent which means that making multiple identical requests ends up having the same result as a single request. Donot expose unsafe operations via GET. It should never modify any resources on the server. Example: ------------    GET http://www.example.com/customers/12345/orders POST =================================== -> The POST verb is most-often utilized to **create** new resources. In particular, it's used to create subordinate resources. -> That is, subordinate to some other (e.g. parent) reso...
Post a Comment
Read more