this document provide the information about the RMI(Remote Method Invocation).in this document cover topic like architecture of RMI,stub, skeleton and how work RMI application.
Overview of Java RMI remoting.
RMI is a lightweight Java technology that provides access to remote methods, similar to RPC, but object-oriented. RMI basically provides remote object access for a client and object registration for servers.
RMI is both a Java API (java.rmi.* package) as well as a transport protocol definition for transporting RMI calls through a network.
RMI is a Java technology since it requires that client and server objects run in a JVM (Java Virtual Machine). By using IIOP as transport protocol, however, it is possible to connect RMI-clients to non-Java server objects (e.g. CORBA).
RMI defines the elements client, server, RMI registry where servers register their services and possibly a plain vanilla web server that can be used by clients to dynamically load object classes to access servers.
Overview of Java RMI remoting.
RMI is a lightweight Java technology that provides access to remote methods, similar to RPC, but object-oriented. RMI basically provides remote object access for a client and object registration for servers.
RMI is both a Java API (java.rmi.* package) as well as a transport protocol definition for transporting RMI calls through a network.
RMI is a Java technology since it requires that client and server objects run in a JVM (Java Virtual Machine). By using IIOP as transport protocol, however, it is possible to connect RMI-clients to non-Java server objects (e.g. CORBA).
RMI defines the elements client, server, RMI registry where servers register their services and possibly a plain vanilla web server that can be used by clients to dynamically load object classes to access servers.
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This ppt explain you various type of possible attack, security property, Traffic Analysis, Security mechanism Intrusion detection system, vulnerability, Attack framework etc.
Recently The Java Remote Method Invocation (RMI) system allows an object running in one Java virtual machine to invoke methods on an object running in another Java virtual machine. RMI provides for remote communication between programs written in the Java programming language.
This Presentation shows the working of Java RMI technology, it's advantage over RPC, it's class hierarchy API and finally implementation of Factorial program using Java RMI.
Remote Method Invocation, Distributed Programming in java, Java Distributed Programming, Network Programming in JAVA, Core Java, Introduction to RMI, Getting Started with RMI, Getting Started with Remote Method Invocation, Distributed Programming, Java, J2SE
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Computer Security and Intrusion Detection(IDS/IPS)LJ PROJECTS
This ppt explain you various type of possible attack, security property, Traffic Analysis, Security mechanism Intrusion detection system, vulnerability, Attack framework etc.
Recently The Java Remote Method Invocation (RMI) system allows an object running in one Java virtual machine to invoke methods on an object running in another Java virtual machine. RMI provides for remote communication between programs written in the Java programming language.
This Presentation shows the working of Java RMI technology, it's advantage over RPC, it's class hierarchy API and finally implementation of Factorial program using Java RMI.
Remote Method Invocation, Distributed Programming in java, Java Distributed Programming, Network Programming in JAVA, Core Java, Introduction to RMI, Getting Started with RMI, Getting Started with Remote Method Invocation, Distributed Programming, Java, J2SE
This is a presentation i made about Denial of Service or a Distributed Denial of Service (DoS / DDoS) and the latest methods used to crash anything online and the future of such attacks which can disrupt the whole internet . Such attacks which are in TB's and can be launched from just single computer. And, there is not much that can be done to prevent them.
- Explain the basics RMI and practical exercises using Java
- References
YouTube link :
https://www.youtube.com/playlist?list=PLtDIUAtyP4lhV7CsYfLuIx26UeG4J-ujZ
GitHub :
https://github.com/Ghadeerof
If you have an access to an object on a different machine,
you can call methods of the remote object.of course, the method parameters must somehow be shipped to the other machine,the server must be informed to execute the method & the return value must be shipped back.
In RMI, the object whose methods makes the remote call is called the client object. The remote object is called the server object.The computer running the java code that calls the remote method is the client for that call.
The computer hosting the object that processes the call is the server for that call.
The RMI Java Remote Method Invocation Application Programming Interface (API), or Java RMI, is a Java API that performs the object-oriented equivalent of remote procedure calls (RPC), with support for direct transfer of serialized Java objects and distributed garbage collection.
The original implementation depends on Java Virtual Machine (JVM) class representation mechanisms and it thus only supports making calls from one JVM to another. The protocol underlying this Java-only implementation is known as Java Remote Method Protocol (JRMP).
• In order to support code running in a non-JVM context, a CORBA version was later developed.
• In order to support code running in a non-JVM context, a CORBA version was later developed.
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1. R E M O T E M E T H O D I N V O C A T I O N
1
JAVA
2. Content
2
What is RMI?
Stub
Skeleton
Architecture of RMI
Working of an RMI Application
3. What is RMI?
3
RMI stands for Remote Method Invocation.
The RMI is an API that provides a mechanism to create distributed
application in java.
The RMI provides remote communication between the applications
using two objects stub and skeleton.
4. Understanding stub and skeleton
4
RMI uses stub and skeleton object for communication with the
remote object.
A remote object is an object whose method can be invoked
from another JVM.
5. Stub
5
The stub is an object, acts as a gateway for the client side.
It resides at the client side and represents the remote object.
When the caller invokes method on the stub object, it does the
following tasks:
• It initiates a connection with remote Virtual Machine (JVM),
• It writes and transmits (marshals) the parameters to the remote
Virtual Machine (JVM),
• It waits for the result
• It reads (unmarshals) the return value or exception, and
• It finally, returns the value to the caller.
6. Skeleton
6
The skeleton is an object, acts as a gateway for the server side object.
All the incoming requests are routed through it.
When the skeleton receives the incoming request, it does the following
tasks:
• It reads the parameter for the remote method
• It invokes the method on the actual remote object, and
• It writes and transmits (marshals) the result to the caller.
7. Architecture of RMI Application
7
In an RMI application, we write two programs, a server program
(resides on the server) and a client program (resides on the client).
Inside the server program, a remote object is created and reference of
that object is made available for the client (using the registry).
The client program requests the remote objects on the server and tries
to invoke its methods.
9. Architecture of RMI Application
9
Transport Layer − This layer connects the client and the server. It
manages the existing connection and also sets up new connections.
Stub − A stub is a representation (proxy) of the remote object at
client. It resides in the client system; it acts as a gateway for the
client program.
Skeleton − This is the object which resides on the server side. stub
communicates with this skeleton to pass request to the remote
object.
RRL(Remote Reference Layer) − It is the layer which manages
the references made by the client to the remote object.
10. Working of an RMI Application
10
When the client makes a call to the remote object, it is received by
the stub which eventually passes this request to the RRL.
When the client-side RRL receives the request, it invokes a method
called invoke() of the object remoteRef. It passes the request to
the RRL on the server side.
The RRL on the server side passes the request to the Skeleton (proxy
on the server) which finally invokes the required object on the server.
The result is passed all the way back to the client.