flow | Vaadin Flow is a Java framework binding Vaadin web | Web Framework library

 by   vaadin Java Version: 23.3.13 License: Apache-2.0

kandi X-RAY | flow Summary

kandi X-RAY | flow Summary

flow is a Java library typically used in Server, Web Framework, Spring applications. flow has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can download it from GitHub, Maven.


            kandi-support Support

              flow has a highly active ecosystem.
              It has 488 star(s) with 146 fork(s). There are 50 watchers for this library.
              There were 10 major release(s) in the last 12 months.
              There are 1015 open issues and 5203 have been closed. On average issues are closed in 332 days. There are 9 open pull requests and 0 closed requests.
              It has a positive sentiment in the developer community.
              The latest version of flow is 23.3.13

            kandi-Quality Quality

              flow has 0 bugs and 0 code smells.

            kandi-Security Security

              flow has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              flow code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              flow is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              flow releases are available to install and integrate.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.

            Top functions reviewed by kandi - BETA

            kandi has reviewed flow and discovered the below as its top functions. This is intended to give you an instant insight into flow implemented functionality, and help decide if they suit your requirements.
            • Handle a DOM event
            • Returns the id of the closest state node in the event target
            • Resolves the filters for the given event type
            • Resolves a debounce configuration
            • Handle the index
            • Setup the error dialogs
            • Setup Pwa headers for pwa
            • Emit the selection script
            • Retrieves a single script from the dependency set
            • Handles the RPC call
            • Load a stylesheet
            • Compute the PWA configuration
            • Handle a request
            • Restores the current session
            • Handles an invocation request
            • Handles the invocation
            • Computes the theme for the specified end - points
            • Serves a static resource
            • Execute the deployment
            • Binds the given state node
            • Registers the application
            • Discover the PWA configuration
            • Update live reload
            • Serves a file from a dev mode
            • Attach an existing element
            • Checks access to the target view
            Get all kandi verified functions for this library.

            flow Key Features

            No Key Features are available at this moment for flow.

            flow Examples and Code Snippets

            Build the control flow graph .
            pythondot img1Lines of Code : 31dot img1License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def build_graph(device, n, m, k, transpose_a, transpose_b, dtype):
              """Build a graph containing a sequence of matmul operations.
                device: String, the device to run on.
                n: tensor A's first dimension size.
                m: tensor A's second dime  
            Build a TensorArray with the given flow tensor .
            pythondot img2Lines of Code : 29dot img2License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def build_ta_with_new_flow(old_ta, flow):
              """Builds a TensorArray with a new `flow` tensor."""
              # Sometimes we get old_ta as the implementation, sometimes it's the
              # TensorArray wrapper object.
              impl = (old_ta._implementation if isinstance(old_  
            Context manager that preserves control flow context .
            pythondot img3Lines of Code : 28dot img3License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def _preserve_control_flow_context(tensor):
              """Preserve the control flow context for the given tensor.
              Sets the graph context to the tensor's context so that side effect ops are
              added under the same context.
              This is needed when subscribing   

            Community Discussions


            Application Insights starttrackevent stopstrackevent across pages in a single session
            Asked 2021-Jun-15 at 22:35

            I am having trouble tracking down documentation on this, so hoping someone knows as I am not able to get application insights to capture telemetry on starttrackevent and stopstrackevent across pages. This is an asp.net mvc application, so SPA is not in play here.

            I am worried I may be doing something incorrectly, however the likely case is it doesn't support it.


            • user hits site for the first time
            • user does action that triggers startTrackEvent("eventName");
            • user navigates to a new page
            • user does action that triggers stopTrackEvent("eventName");

            -- from the appInsights readme https://github.com/microsoft/ApplicationInsights-JS/blob/master/README.md


            appInsights.stopTrackEvent("event", null, {customProp1: "some value"});



            Answered 2021-Jun-15 at 22:35

            Not per documentation, but via testing, can confirm that when a new page loads, appInsights will not persist start/stoptrackevent.

            Source https://stackoverflow.com/questions/67929386


            Convert interface with nullable string property to string property
            Asked 2021-Jun-15 at 18:49

            I have the following two interfaces, one which allows a nullable vin, the other that doesn't:



            Answered 2021-Jun-15 at 18:49

            You can use a type predicate to define a user-defined type guard like this:

            Source https://stackoverflow.com/questions/67989014


            How do I use a Transaction in a Reactive Flow in Spring Integration?
            Asked 2021-Jun-15 at 18:32

            I am querying a database for an item using R2DBC and Spring Integration. I want to extend the transaction boundary a bit to include a handler - if the handler fails I want to roll back the database operation. But I'm having difficulty even establishing transactionality explicitly in my integration flow. The flow is defined as



            Answered 2021-Jun-15 at 18:32

            Well, it's indeed not possible that declarative way since we don't have hook for injecting to the reactive type in the middle on that level.

            Try to look into a TransactionalOperator and its usage from the Java DSL's fluxTransform():

            Source https://stackoverflow.com/questions/67991494


            Preventing spoofing attack - how to ensure my client receives orders from the real server?
            Asked 2021-Jun-15 at 16:51

            I'm working on a Chrome extension that integrates with a website. My users can do actions on this website when they are logged in to it.

            I have a Socket.IO server that delivers commands to my Chrome extension. Once a command arrived, the extension invokes a local function from the host website. Then, the host website, which has an authenticated active session with its own API, will invoke some update/insert call.

            I recently realized a potential security issue, which is - if anyone spoofs my server address on my extension clients organization, he can easily abuse it to send his own parameters on behalf of my server (image 2).

            Is there any smart way to ensure my client communicates with the real server and not an imposter?



            Answered 2021-Jun-15 at 16:49

            Use HTTPS secured connection.

            This is one of the features of HTTPS (SSL/TLS) - it can prevent a MITM attack and prevent the destination server from being impersonated.


            Source https://stackoverflow.com/questions/67690251


            Why the functions doesn't return new line with replaceable keywords?
            Asked 2021-Jun-15 at 16:33

            Hey just doing some exercises in c, one is saying to replace tabs in the input string with any other characters , i restrict myself to only using getchar(), no gets() fgets() etc..., as my learning book didn't catch it yet, so i tried to not break the flow, the code below just printf() the same line it receives, can you please examine why ?



            Answered 2021-Jun-15 at 16:33
            • c, which is used in c != '\n', is not initialized at first. Its initial value is indeterminate and using is value without initializng invokes undefined behavior.
            • You are checking line[i] != '\0', but you never assigned '\0' to line unless '\0' is read from the stream.
            • You should initialize i before the second loop and update i during the second loop.
            • Return values of getchar() should be assigned to int to distinguish between EOF and an valid character.
            • You should perform index check not to cause buffer overrun.

            Fixed code:

            Source https://stackoverflow.com/questions/67990128


            Azure B2C multiple different customer custom policy
            Asked 2021-Jun-15 at 14:23

            I'm trying to figure out what the best option to solving this problem. I have an frontend application that will cater for both normal user and different company users. I want the normal user to only see the email and password fields while the company user see their respective IDP without seeing other company's IDPs.

            At first, I was thinking of using a custom policy to achieve this. Basically I'll have a custom claim in the outputclaims that will specify the domain and inside my orchestration I'll have a precondition if it doesn't exist then use email and password step and skip everything but if it exist, then skip the email and password and match it to an idp selection step (if domain == companyX) use CompanyX's IDP (GSuite) or (if domain == companyY) use CompanyY's Idp (AAD). So when the company users gets to the selection page they can only see their IDP and not the others. I'm not sure how scalable that would be though.

            The second option I thought was to have one ROPC policy for the normal users and use another policy for IDP selection but this time passing a domain_hint when user attempts to login in. The reason why I would go with ROPC on this option is to give user consistent user experience, normal user sees fields on the page while company user sees a single IDP button that directly sign through the domain_hint directly (Sign-Direct). Essentially having all the UI controlled by me instead of azure.


            • domain_hint=CompanyX - I would have a TechnicalProfile with the domain CompanyX (GSuite)
            • domain_hint=CompanyY - I would have a TechnicalProfile with the domain CompanyX (AAD)

            Now this approach seem to be more intuitive but now my concern is that since ROPC uses Authorization Flow which contains refresh token while the Idp selection flow uses OpenIdConnect which doesn't contain refresh token (or at least managed by AzureB2C) it would screw up how I manage my tokens.

            Is there a better way to implement this situation?

            I feel like I'm missing something or I'm misinterpreting something.



            Answered 2021-Jun-15 at 14:23

            This sample shows how to implement your first option. The technique is called "home realm discovery". https://github.com/azure-ad-b2c/samples/tree/master/policies/home-realm-discovery-modern

            Source https://stackoverflow.com/questions/67987782


            grid layout with resize horizontal not resizing columns
            Asked 2021-Jun-15 at 11:04

            I've got a grid layout and I'm using resize: horizontal on one. It lets me resize the box but it doesn't resize the other columns as I would expect it to.



            Answered 2021-Jun-15 at 11:04

            minmax(100px, 200px) is as good as 200px if you want shrinking behavior change to minmax(100px, 1fr)

            If you want the grid to responsed to the content rather than the available width of it's own parent change to display: inline-grid;

            Source https://stackoverflow.com/questions/67959494


            How to use Material icons in Vaadin Flow (14.6)
            Asked 2021-Jun-15 at 08:56

            I'd like to use Material icons in a Vaadin 14.6 application. I found recipes for Lumo and Iron icons here (the default), but did not discover how to integrate Material icons. How can that be accomplished?

            NB: This component seems to be not usable for Vaadin 14.x



            Answered 2021-Jun-15 at 08:56

            There are basically three approaches to this.

            1. Easy approach

            If you use only few icons. https://fonts.google.com/icons allows you to download each icon as svg or png file. So you can easily use those in Image component of Vaadin.

            1. Light approach, use it as a font

            There is training video at Vaadin's site which describes various things related to theming and styling of the app, at 19:30 timestamp there is a chapter about how to configure custom font:


            Material icons are just a font, which you can include in your project.

            Place the webfont files under e.g. "src/main/webapp/fonts/MaterialIcons" (note location is different if you have Spring Boot jar packaged project) and import the generated css

            Source https://stackoverflow.com/questions/67981870


            Java8 Understanding tail-recursive function using a lambda expression:
            Asked 2021-Jun-15 at 08:49

            I am trying to lambda Java8 lambda expressions, Wherein I came across this example. I am unable to understand the program flow,

            The the below example when the factorialTailRec(1, 5).invoke() statement is called the program flow is as shown below:

            1. The program first goes to the factorialTailRec method and once and checks if the number value is equal to 1. In the first iteration, it's not so it goes to the else part.

            2. In the else block the flow is redirected towards the call method inside the TailCall class which will return the same object.

            3. Now the invoke method is called and then the Stream object tries to iterate through the result. I am not getting how the factorialTailRec is called again? They say its because of the below statement,



            Answered 2021-Jun-15 at 08:49


            Gradle Multi-Project Build with JaCoCo Code Coverage fails when using Spring Boot
            Asked 2021-Jun-15 at 08:06


            Answered 2021-Jun-01 at 20:54

            Just do that and you will be fine (all external classes will be excluded):

            Source https://stackoverflow.com/questions/66265413

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install flow

            You can download it from GitHub, Maven.
            You can use flow like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the flow component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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