0
A thread-safe servlet is a type of servlet that can handle multiple requests simultaneously without leading to data inconsistency or corruption. This is achieved by ensuring that shared resources are properly synchronized, often by using mechanisms such as synchronized methods or blocks. In a thread-safe servlet, care must be taken to avoid issues like race conditions, ensuring that the servlet remains reliable and stable under concurrent access. Generally, it's advisable to keep servlets stateless or use instance variables cautiously to maintain thread safety.
What else can I help you with?
What is thread safe object?
A thread safe object is one that would be safe even if multiple thread instances are accessing it. For example if a single object is being updated by a thread and the same object is being read by another thread - we will end up with an inconsistency where the reading object is reading incorrect data because by the time it finishes reading, another thread would've updated it. So we use the keyword synchronized with methods to ensure that such a situation does not happen. An object that wont let two threads access it simultaneously is called a thread safe object
What makes a java method code thread-safe?
The cleanest way to make a method thread-safe is add to the method declaration the synchronized keyword, like this: public class MyClass{ // More code here public synchronized void safeMethod(){ //Do something here, now is safe } } The above code is the same as: public class MyClass{ // More code here public void safeMethod(){synchronized (this){ //Do something here, now is safe } } }
What are the applications of servlets?
Servlet is a Server side component, a servlet is a small pluggable extension to the server and servlets are used to extend the functionality of the java enabled server.
When should the method invokeLater be used?
invokeLater should be used when your code is performing a GUI change in the Swing UI library, and you cannot guarantee that the change is being made in the Event Dispatching Thread (which can cause data problems, as Swing is not "thread-safe"). So, invokeLater should be used if (1) you are using Swing, and (2) you are using Thread, and (3) the thread from 2 needs to update a GUI element that is part of Swing.
Is an EUE thread a Non-Pressure sealed thread?
EUE thread is a pressure sealed thread as usual completion pup joints thread
Is Servlet instance Thread safe If not how can you make thread safe?
No. The Servlet is not thread-safe by default. You can make it thread safe by implementing the SingleThreadedModel interface
Differences between cgi and servlet?
CGI creates process for each client call where as servlet creates process for the first time and then uses thread for each client.
What is difference between single threaded servlet and multi threaded servlet?
The single thread model means that your servlet would not be multi-threaded. If there are two concurrent requests to your servlet then 2 instances of your servlet will be created to process these 2 requests. You can implement the single thread model by implementing the SingleThreadModel interface in your class. This is just a marker interface and does not have any methods. The multi threaded model means that your servlet would be multi-threaded and only one instance would exist. Multiple concurrent requests would be served by the same instance but in different threads. You can implement the multi threaded model by not implementing the SingleThreadModel interface in your servlet class.
Is jsp thread safe by default?
No. JSPs are not thread safe by default
Is struts thread safe?
Struts 1 Actions are singletons and must be thread-safe since there will only be one instance of a class to handle all requests for that Action. The singleton strategy places restrictions on what can be done with Struts 1 Actions and requires extra care to develop. Action resources must be thread-safe or synchronized. Struts 2 Action objects are instantiated for each request, so there are no thread-safety issues. (In practice, servlet containers generate many throw-away objects per request, and one more object does not impose a performance penalty or impact garbage collection.)
What are types of servlet?
Http servlet and Generic servlet
Is thread safe for parrots?
If it is large enough.
What is java servlet chaining?
Servlet Chaining means the output of one servlet act as a input to another servlet. Servlet Aliasing allows us to invoke more than one servlet in sequence when the URL is opened with a common servlet alias. The output from first Servlet is sent as input to other Servlet and so on. The Output from the last Servlet is sent back to the browser. The entire process is called Servlet Chaining.
What is thread safe object?
A thread safe object is one that would be safe even if multiple thread instances are accessing it. For example if a single object is being updated by a thread and the same object is being read by another thread - we will end up with an inconsistency where the reading object is reading incorrect data because by the time it finishes reading, another thread would've updated it. So we use the keyword synchronized with methods to ensure that such a situation does not happen. An object that wont let two threads access it simultaneously is called a thread safe object
Describe the life cycle of servelet?
Each servlet has the same life cycle: * A server loads and initializes the servlet * The servlet handles zero or more client requests * The server removes the servlet (some servers do this step only when they shut down) == When a server loads a servlet, the server runs the servlet's init method. Initialization completes before client requests are handled and before the servlet is destroyed. Even though most servlets are run in multi-threaded servers, servlets have no concurrency issues during servlet initialization. The server calls the init method once, when the server loads the servlet, and will not call the init method again unless the server is reloading the servlet. The server can not reload a servlet until after the server has destroyed the servlet by calling the destroy method. == After initialization, the servlet is able to handle client requests. This part of the servlet life cycle was handled in the previous lesson. == Servlets run until the server are destroys them, for example, at the request of a system administrator. When a server destroys a servlet, the server runs the servlet's destroy method. The method is run once; the server will not run that servlet again until after the server reloads and reinitializes the servlet. When the destroy method runs, another thread might be running a service request. The Handling Service Threads at Servlet Termination lesson shows you how to provide a clean shutdown when there could be long-running threads still running service requests.
Can insert javascript coding in servlet?
No. Javascript code can be present inside a JSP but not inside a servlet. A Servlet is a pure java class.
What is servlet mapping?
A Servlet Mapping is a directive in the web.xml that tells the Servlet Container which class to use when a particular Servlet is called. A Servlet is a class within your Java Web Application. Let's say you have a servlet called MyServlet in the com.example.servlet package. You would need to have a Servlet Mapping pointing the path "/MyServlet" to the "com.example.servlet.MyServlet" class. Without the servlet mapping, you would not be able to invoke your servlet because the Servlet container would not know where it is. JSPs are different - they do not need mappings like this. JSPs exist within the WebRoot of the application, so they are always available. Servlets exist in the WEB-INF\Classes directory once your application is deployed.
