Usage and differences between ServletConfig and ServletContext interfaces

Hi ,
AM unable to understand the difference bw ServletConfig and ServletContext interfaces.
Can someone explain me with detailed example or send me a good link to get the required understanding.
Hope to see a response quickly..
Regards,
siva

A simple search on Google shows:
http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletConfig.html
A servlet configuration object used by a servlet container (like Tomcat) used to pass information to a servlet during initialization.
http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletContext.html
Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file.

Similar Messages

Difference between Abstract Classes Vs Interface

Hi,
Can u pls mention all the differences between Abstract Classes and Interface.? I've mentioned the differences I've known here.
Known Differences:
(*) An interface cannot implement any methods, whereas an abstract class can.
(*) A class can implement many interfaces but can have only one superclass
Can U pls mention at what situation(practical situation) we've to go for abstract class or Interface?
Tell me the situation when we have to go for abstract class?
Tell me the situation when we have to go for interface?
Please Reply me
Thanks & Regards
Venkatesh

There are more differences, and one really important is that abstract classes can also define class variables, while interfaces cannot. I think the question of when to use interfaces or abstract classes is not always easy to answer, but yourself have pointed some tips you should be aware of :
If you need that some funcionality of the class is derived by more than one "parent" then you should use interfaces, since you cannot extend more than one class.
If your "superclass" needs to define some class variables then the choice must be made to have a superclass and then extend it. Also this is applicable if there is a method that can be programmed at a higher level (in interfaces you cannot program methods).
But the answer to the question is still not easy. And remember, you can always mix both tipes, you can extend one class and implement some interfaces.
Examples or that are very common in the Java API for AWT or Swing components, for example javax.swing.JLabel extends javax.swing.JComponent (that is beacuse a JLabel IS a JComponent and it uses some variables and methods programmed at the JComponent "level") and it also implements some interfaces: Accessible, ImageObserver, MenuContainer, Serializable & SwingConstants.
I hope this helps.
Zerjillo

Difference ServletConfig and ServletContext

Hi,
can any one explain me clearly what is the difference between ServletConfig and ServletContext.

hi tiwari,
servlet context is used if u want some values which must exist for the life time of the application. A servlet config object used by a servlet container to pass information to a servlet during initialization.The ServletContext object is contained within the ServletConfig object, which the Web server provides the servlet when the servlet is initialized.
regards,
varma

What is difference between using interface as source and table as source?

I am working on a batch flow which need several steps to populate data from source to target. For example, I need 5 interfaces to finish final data loading. I can either use interface or use temporary table as source and target for the interface 2, 3, and 4. It looks like both case will use tables no matter use interface or use temporary table. So my question is if there is any difference between these two (using interface as source or use temporary table as source)?
Thanks

if you use a Table as source for the intermediate process, it will create a physical temporary table i your work rep(depends on you choice) and populate the data into the table. if you use a interface as a source, just it will create a sub query instead of temporary table.
Thanks
nidhi

Difference between Interface node and normal node?

What is the main difference between Interface node and normal node?
Cheers
Aisurya.

Hi surya,
Interface node or methods comes into picture whenever you want to use one component as used component. I mean to say
Component usages. If you select node as interface node, it will available in another component so you can use that node or methods.
Normal node means in that component only. Simply we can say for component usages we go for interface nodes.
Cehck This...
http://help.sap.com/saphelp_nw70ehp1/helpdata/EN/79/555e3f71e41e26e10000000a114084/content.htm
Cheers,
Kris.

Difference between Conversion progs and INTERFACES

Hi plz tell me ...
whats the difference between Conversion progs and Interfaces in ABAP .
wat are conversion progs ( exmple) and interfaces ( exmple ) ?
thnks in advance....

Hi
CONVERSION programs are the ones which have one time usage, usually when a legacy system is being replaced by a system like SAP, then the data has to be mapped from the legacy system to SAP system. Here the data to be converted is given on a flat file & is uploaded to SAP tables mostly using LSMW only. Conversions programs are BDC,BAPI and LSMW programs in which you upload all the related tables from the flat files.Those are one time programs.
Interface programs are those programs in which you fetch the data from the application server and process on theose data.These are helpful when you have to run any program in the backgroup when the presentation server is not working.
INTERFACE programs are the ones which are run at regular intervals, say weekly, monthly or even daily. Here the legacy system continues to co-exist along with SAP system, the legacy system might be useful for certain functionalities but the data might have to run thru SAP transactions for complex data maintenance at regular intervals.
In Simple
CONVERSIONS : Converting Legacy System DATA into a flat file
INTERFACES : Converting Flat File into SAP
Conversion Program
http://help.sap.com/saphelp_erp2005/helpdata/en/d3/a65a14e96911d1b401006094b944c8/frameset.htm
Interface Program
http://help.sap.com/saphelp_erp2005/helpdata/en/64/be5b4150b38147e10000000a1550b0/frameset.htm
<b>Reward if usefull</b>

Difference between custom controller and interface component

Hi,
Can anybody tell me what are the differences between component controller and custome controller , component interface.
Thanks in advance.
Regards
sireesha.

hi,
When any component is created web dynpro framework automatically generates the controller(controller is nothing but entity which controls the working of views and acts as a binding layer between model and view), this controller is called Component controller.
We can have as many controller as we want, but they should be used sparingly, Controller should encapsulate the functionality which is common to whole component , like if your application fetches master data and appliaction data so better you should have 2 controller , 1 for master and 2 for application so as to have modularisation in your application.
Component Interface is the entity which is used when you want to use the functionality defined in some other component i.e. if your main component is acting as a parent comopnent then the child component usage should be defined via this interface controller under Component Interface, so that main compo will access it via childs Interface Controller.
Other node under this , Interface view , gets generated for every creation of window , Interface view is entry point into our application for web Dynpro framework
jsut check out following links,
Re: Difference between Component Controller and Custom Controllet...?
Re: custom vs component controller
check out these ex for the Component Interface and node under this,
https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/webcontent/uuid/19e6e990-0201-0010-eca6-a62e342eaad3 [original link is broken]
https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/webcontent/uuid/1208c2cd-0401-0010-4ab6-f4736074acc6 [original link is broken]
https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/webcontent/uuid/1ee0e990-0201-0010-75bf-a087c241cb83 [original link is broken]
hope it helps
regards

The difference between IEEE802.1Q Native VLAN sub-interface and Physical interface?

Hello
I think the following topologies are supported for Cisco Routers
And the Physical interface also can be using as Native VLAN interface right?
Topology 1.
R1 Gi0.1 ------ IEEE802.1Q Tunneling L2SW ------ Gi0 R2
R1 - configuration
interface GigabitEthernet0.1
encapsulation dot1Q 1 native
ip address 10.0.0.1 255.255.255.0
Topology 2.
R1 Gi0 ------ IEEE802.1Q Tunneling L2SW ------ Gi0 R2
interface GigabitEthernet0
ip address 10.0.0.1 255.255.255.0
And is it ok to use the physical interface and sub-interface with dynamic routing such as EIGRP or OSPF etc?
R1 Gi 0 ---- Point to Multipoint EIGRP or OSPF ---- Gi0 R2 / R3
Gi 0.20--- Point to Point EIGRP or OSPF --- Gi0.10 R4 (same VLAN-ID)
R1 - configuration
interface GigabitEthernet0
ip address 10.0.0.1 255.255.255.0
interface GigabitEthernet8.20
encapsulation dot1Q 20
ip address 20.0.0.1 255.255.255.0
Any information is very appreciated. but if there is any CCO document please let me know.
Thank you very much and regards,
Masanobu Hiyoshi

Hello,
The diagram is helpful.
If I am getting you correctly, you have three routers interconnected by a switch, and you want them to operate in a hub-and-spoke fashion even though the switch is capable of allowing direct communication between any of these routers.
Your first scenario is concerned with all three routers being in the same VLAN, and by using neighbor commands, you force these routers to establish targeted EIGRP adjacencies R1-R2 and R1-R3, with R1 being the hub.
Your second scenario is concerned with creating one VLAN per spoke, having subinterfaces for each spoke VLAN created on R1 as the router, and putting each spoke just in its own VLAN.
Your scenarios are not really concerned with the concept of native VLAN or the way it is configured, to be honest. Whether you use a native VLAN in either of your scenarios, or whether you configure the native VLAN on a subinterface or on the physical interface makes no difference. There is simply no difference to using or not using a native VLAN in any of your scenarios, and there is no difference to the native VLAN configuration being placed on a physical interface or a subinterface. It's as plain as that. Both your scenarios will work.
My personal opinion, though, is that forcing routers on a broadcast multi-access segment such as Ethernet to operate in a hub-and-spoke fashion is somewhat artificial. Why would you want to do this? Both scenarios have drawbacks: in the first scenario, you need to add a neighbor statement for each spoke to the hub, limiting the scalability. In the second scenario, you waste VLANs and IP subnets if there are many spokes. The primary question is, though: why would you want an Ethernet segment to operate as a hub-and-spoke network? Sure, these things are done but they are motivated by specific needs so I would like to know if you have any.
Even if you needed your network to operate in a hub-and-spoke mode, there are more efficient means of achieving that: Cisco switches support so-called protected ports that are prevented from talking to each other. By configuring the switch ports to spokes as protected, you will prevent the spokes from seeing each other. You would not need, then, to configure static neighbors in EIGRP, or to waste VLANs for individual spokes. What you would need to do would be deactivating the split horizon on R1's interface, and using the ip next-hop-self eigrp command on R1 to tweak the next hop information to point to R1 so that the spokes do not attempt to route packets to each other directly but rather route them over R1.
I do not believe I have seen any special CCO documents regarding the use of physical interfaces or subinterfaces for native VLAN or for your scenarios.
Best regards,
Peter

Whats the difference between an INTERFACE and a CLASS?

Whats the difference between an INTERFACE and a CLASS?
Please help.
Thanx.

http://search.java.sun.com/search/java/index.jsp?col=javaforums&qp=%2Bforum%3A31&qt=Difference+between+interface+and+class

Difference between abstract interface and normal interface

Hello Friends,
What is the Difference between abstract interface and normal interface?....

What is the Difference between abstract interface and
normal interface?....The difference is that you didn't follow convention in the first case. All interfaces are implicitly abstract so you don't have to declare them as such.

Difference between narrow() method usage and simple class cast for EJB

Hi,
I have a very simple question:
what is the difference between PortableRemoteObject.narrow(fromObj,
toClass) method usage and simple class cast for EJB.
For example,
1)
EJBObject ejbObj;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)PortableRemoteObject.narrow(ejbObj,ABean.class);
OR
2)
EJBObject bean;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)ejbObj;
Which one is better?
P.S. I'm working with WL 6.1 sp2
Any help would be appreciated.
Thanks in advance,
Orly

[email protected] (Orly) writes:
Hi,
I have a very simple question:
what is the difference between PortableRemoteObject.narrow(fromObj,
toClass) method usage and simple class cast for EJB.
For example,
1)
EJBObject ejbObj;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)PortableRemoteObject.narrow(ejbObj,ABean.class);
OR
2)
EJBObject bean;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)ejbObj;
Which one is better?(1) is mandated by the spec. It is required because CORBA systems may
not have sufficient type information available to do a simple case.
P.S. I'm working with WL 6.1 sp2 You should always use PRO.narrow()
andy

Differences between Convensional interfaces and XI interfaces

Differences between Convensional interfaces and XI interfaces

hi,
wat do u mean my "Convensional interfaces"?
let me know.
kvr

Difference between Form Interface and Global definitions in Smartforms.

Hi guys!
I'm learning about Smartforms.
I would like to know which is the difference between Form Interface from the Global Settings and Global Definitions from Global settings as well, because in both of them I have to declare tables, structures, variables, etc. Could you please explain to me when should I use them?
Thanks!
Gaby

Two ways to use Smart Form:
1. by using Application Program
2. By coding in Smart form itself.
Now, if the 1st method is used then same interface can be used for multiple requirements. For eg two different programs Z1 and Z2, may use same interface. Hence a lot of efforts are reduced.
On the other side in 2nd method, multiple forms have to be created to fulfill different requirements.
Now, Global Definiton is something that is irrespective of which Program is being used, the form nodes can use the Global definition in all cases.
Also all tables etc must be declared in the Global setting.
Regards,
Sana

Difference between interface pool and class pool

Hi,
Can any body tell me the difference between Interface pool and Class pool.
thank you in advance.
regards

Hi,
Class and Interface Pools
This section discusses the structure and special features of class and interface pools for global classes.
Global Classes and Interfaces
Classes and interfaces are object types. You can define them either globally in the Repository or locally in an ABAP program. If you define classes and interfaces globally, special ABAP programs called class pools or interface pools of type K or J serve as containers for the respective classes and interfaces. Each class or interface pool contains the definition of a single class or interface. The programs are automatically generated by the Class Builder when you create a class or interface.
A class pool is comparable to a module pool or function group. It contains both declarative and executable ABAP statements, but cannot be started on its own. The runtime system can create runtime instances (objects) through a request using the CREATE OBJECT statement. These objects execute the statements of the class pool.
Interface pools do not contain any executable statements. Instead, they are used as containers for interface definitions. When you implement an interface in a class, the interface definition is implicitly included in the class definition.
Structure of a Class Pool
Class pools are structured as follows:
Class pools contain a definition part for type declarations, and the declaration and implementation parts of the class.
Differences From Other ABAP Programs
Class pools are different from other ABAP programs for the following reasons:
·        ABAP programs such as executable programs, module pools, or function modules, usually have a declaration part in which the global data for the program is defined. This data is visible in all of the processing blocks in the program. Class pools, on the other hand, have a definition part in which you can define data and object types, but no data objects or field symbols. The types that you define in a class pool are only visible in the implementation part of the global class.
·        The only processing blocks that you can use are the declaration part and implementation part of the global class. The implementation part may only implement the methods declared in the global class. You cannot use any of the other ABAP processing blocks (dialog modules, event blocks, subroutines, function modules).
·        The processing blocks of class pools are not controlled by the ABAP runtime environment. No events occur, and you cannot call any dialog modules or procedures. Class pools serve exclusively for class programming. You can only access the data and functions of a class using its interface.
·        Since events and dialog modules are not permitted in classes, you cannot process screens in classes. You cannot program lists and selection screens in classes, since they cannot react to the appropriate events. It is intended to make screens available in classes. Instead of dialog modules, it will be possible to call methods of the class from the screen flow logic.
Local Classes in Class Pools
The classes and interfaces that you define in the definition part of a class pool are not visible externally. Within the class pool, they have a similar function to local classes and interfaces in other ABAP programs. Local classes can only be instantiated in the methods of the global class. Since subroutines are not allowed in class pools, local classes are the only possible modularization unit in global classes. Local classes have roughly the same function for global classes as subroutines in function groups, but with the significant exception that they are not visible externally
Reward points if useful....
Regards
AK

What's the difference between the iPad wifi and iPad wifi 3g? Okay, so I'm planning to buy an iPad and would like to know more of the details. I know that ipad wifi 3g would offer me with internet usage anywhere and anytime.

What's the difference between the iPad wifi and iPad wifi 3g? Okay, so I'm planning to buy an iPad and would like to know more of the details. I know that ipad wifi 3g would offer me with internet usage anywhere and anytime.

Welcome to the Support Communities. The differences are spelled out here:
http://www.apple.com/ipad/specs/
...For example, note that the Wi-Fi + Cellular model has assisted GPS for more accurate pinpointing of your geographic location.

Usage and differences between ServletConfig and ServletContext interfaces

Similar Messages

Maybe you are looking for