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solutions-mobile-shopping-assistant-android-client | This project | Reactive Programming library

 by   googlearchive Java Version: Current License: Apache-2.0

 by   googlearchive Java Version: Current License: Apache-2.0

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kandi X-RAY | solutions-mobile-shopping-assistant-android-client Summary

solutions-mobile-shopping-assistant-android-client is a Java library typically used in Programming Style, Reactive Programming, React Native applications. solutions-mobile-shopping-assistant-android-client has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However solutions-mobile-shopping-assistant-android-client build file is not available. You can download it from GitHub.
This project is no longer actively developed or maintained. For new work on this check out MobileShoppingAssistant.
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kandi-support Support

  • solutions-mobile-shopping-assistant-android-client has a low active ecosystem.
  • It has 27 star(s) with 25 fork(s). There are 19 watchers for this library.
  • It had no major release in the last 12 months.
  • solutions-mobile-shopping-assistant-android-client has no issues reported. There are 1 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of solutions-mobile-shopping-assistant-android-client is current.
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quality kandi Quality

  • solutions-mobile-shopping-assistant-android-client has 0 bugs and 0 code smells.
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securitySecurity

  • solutions-mobile-shopping-assistant-android-client has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • solutions-mobile-shopping-assistant-android-client code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
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license License

  • solutions-mobile-shopping-assistant-android-client 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.
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buildReuse

  • solutions-mobile-shopping-assistant-android-client releases are not available. You will need to build from source code and install.
  • solutions-mobile-shopping-assistant-android-client has no build file. You will be need to create the build yourself to build the component from source.
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Top functions reviewed by kandi - BETA

kandi has reviewed solutions-mobile-shopping-assistant-android-client and discovered the below as its top functions. This is intended to give you an instant insight into solutions-mobile-shopping-assistant-android-client implemented functionality, and help decide if they suit your requirements.

  • Checks if the location is better than the current location .
    • Returns the message which should be displayed for price notifications .
      • Starts the last known location updates .
        • Called when the activity is created .
          • Called when an activity is clicked .
            • Updates the AbstractGoogleClient .
              • Display price check lower price notifications .
                • Method setView .
                  • Download a bitmap from the specified URLs .
                    • get request initializer

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      solutions-mobile-shopping-assistant-android-client Key Features

                      Community Discussions

                      Trending Discussions on Reactive Programming
                      • How to use RXJS to share a pool of resources between multiple consumers
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                      • UseCases or Interactors with Kt Flow and Retrofit
                      • DT: Dynamically change column values based on selectinput from another column in R shiny app
                      • Send a list of objects one at time in reactive way
                      • Changing the target of a `whenever` block from the inside
                      • How to apply back pressure with Combine buffer operator to avoid flatMap to ask an infinite demand upstream?
                      Trending Discussions on Reactive Programming

                      QUESTION

                      How to use RXJS to share a pool of resources between multiple consumers

                      Asked 2022-Mar-31 at 12:55

                      How can we divide work of consumers over a limited set of resources in RXJS?

                      I have a Pool class here (simplified):

                      class Pool<TResource> {
                      
                        private readonly resource$: Observable<TResource>;
                      
                        constructor(resource$: Observable<TResource>) {
                          this.resource$ = resource$.pipe(
                            // We use share replay here, so multiple calls to `schedule` will share the resources
                            shareReplay()
                          );
                        }
                      
                        /**
                         * Schedules a task to be executed on resources in the pool. Each input is paired with a resource, which allows async work to be done.
                         * @param input$ The inputs to pair up with a resource.
                         * @param task The task to execute on each resource
                         */
                        public schedule<TIn, TOut>(input$: Observable<TIn>, task: (resource: TResource, input: TIn) => Promise<TOut> | TOut): Observable<TOut> {
                          const recycleBin = new Subject<TResource>();
                          const resource$ = merge(recycleBin, this.resource$);
                      
                          return zip(resource$, input$).pipe(
                            mergeMap(async ([resource, input]) => {
                              const output = await task(resource, input);
                              //  Recycles a resource so its re-emitted from the `resource$` observable.
                              recycleBin.next(resource);
                              return output;
                            }),
                            tap({ complete: () => recycleBin.complete() })
                          );
                        }
                      }
                      

                      You can use it like this:

                      class CalculatorResource {
                        expensiveCalculation(n: number) {
                          return new Promise<number>(res => setTimeout(() => res(n*2), 1000));
                        }
                      }
                      
                      const pool = new Pool(of(new CalculatorResource(), new CalculatorResource()));
                      const input$ = of(1, 2, 3, 4);
                      const output$ = pool.schedule(input$, (calc, n) => calc.expensiveCalculation(n));
                      output$.subscribe(console.log)
                      // ...wait 1 sec
                      // Logs 2
                      // Logs 4
                      // ...wait 1 sec
                      // Logs 6
                      // Logs 8
                      

                      This works as expected.

                      However, when we call schedule in parallel, the resources will also be distributed in parallel. This is not good, we want the resources to be distributed evenly, since the nature of the tasks they do make it so they can't be called in parallel.

                      const pool = new Pool(of(new CalculatorResource(), new CalculatorResource()));
                      const input$ = of(1, 2, 3, 4);
                      const parallelInput$ = of(5, 6, 7, 8);
                      pool.schedule(input$, (calc, n) =>
                        calc.expensiveCalculation(n)
                      ).subscribe(console.log);
                      pool.schedule(parallelInput$, (calc, n) =>
                        calc.expensiveCalculation(n)
                      ).subscribe(console.log);
                      // Actual output:
                      
                      // ...wait 1 sec
                      // Logs 2
                      // Logs 4
                      // Logs 10
                      // Logs 12
                      // ...wait 1 sec
                      // Logs 6
                      // Logs 8
                      // Logs 14
                      // Logs 16
                      
                      // What i would like to see:
                      // ...wait 1 sec
                      // Logs 2
                      // Logs 4
                      // ...wait 1 sec
                      // Logs 10
                      // Logs 12
                      // ...wait 1 sec
                      // Logs 6
                      // Logs 8
                      // ...wait 1 sec
                      // Logs 14
                      // Logs 16
                      

                      ANSWER

                      Answered 2022-Mar-31 at 12:55

                      So the main thing is you need to share the actual part that does the work, not only the resources.

                      Here's a solution from me:

                      https://stackblitz.com/edit/rxjs-yyxjh2?devToolsHeight=100&file=index.ts

                      import { merge, Observable, Observer, of, Subject, zip } from 'rxjs';
                      import { ignoreElements, concatMap, switchMap } from 'rxjs/operators';
                      
                      class Pool<TResource> {
                        private readonly resourceFree$ = new Subject<TResource>();
                        private readonly dispatcher$ = new Subject<{
                          execute: (resource: TResource) => any;
                          observer: Observer<any>;
                        }>();
                        private freeResources$ = merge(this.resource$, this.resourceFree$);
                        readonly doWork$ = zip(this.freeResources$, this.dispatcher$).pipe(
                          switchMap(async ([resource, work]) => {
                            try {
                              const result = await work.execute(resource);
                              work.observer.next(result);
                              work.observer.complete();
                            } catch (err) {
                              work.observer.error(err);
                            }
                            this.resourceFree$.next(resource);
                          }),
                          ignoreElements()
                        );
                      
                        constructor(private resource$: Observable<TResource>) {}
                      
                        public schedule<TIn, TOut>(
                          input$: Observable<TIn>,
                          task: (resource: TResource, input: TIn) => Promise<TOut> | TOut
                        ): Observable<TOut> {
                          return input$.pipe(
                            //you can use mergeMap here as well, depends on how fast you want to consume inputs
                            concatMap((input) => {
                              const work = {
                                execute: (r) => task(r, input),
                                observer: new Subject<TOut>(),
                              };
                              this.dispatcher$.next(work);
                              return work.observer;
                            })
                          );
                        }
                      }
                      
                      class CalculatorResource {
                        expensiveCalculation(n: number) {
                          return new Promise<number>((res) => setTimeout(() => res(n * 2), 1000));
                        }
                      }
                      
                      const pool = new Pool(of(new CalculatorResource(), new CalculatorResource()));
                      pool.doWork$.subscribe(); //this is to start the pool dispatcher
                      
                      const input$ = of(1, 2, 3, 4);
                      const parallelInput$ = of(5, 6, 7, 8);
                      pool
                        .schedule(input$, (calc, n) => calc.expensiveCalculation(n))
                        .subscribe(console.log, undefined, () => console.log('1st done'));
                      pool
                        .schedule(parallelInput$, (calc, n) => calc.expensiveCalculation(n))
                        .subscribe(console.log, undefined, () => console.log('2nd done'));
                      
                      setTimeout(() => {
                        pool
                          .schedule(parallelInput$, (calc, n) => calc.expensiveCalculation(n))
                          .subscribe(console.log, undefined, () => console.log('3rd done'));
                      }, 5000);
                      

                      Source https://stackoverflow.com/questions/71689376

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

                      Vulnerabilities

                      No vulnerabilities reported

                      Install solutions-mobile-shopping-assistant-android-client

                      You can download it from GitHub.
                      You can use solutions-mobile-shopping-assistant-android-client 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 solutions-mobile-shopping-assistant-android-client 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 .

                      Support

                      This sample source code and project is designed to work with Eclipse. It was tested with Eclipse 3.8. The resulted application runs on Android physical devices with Google API and was tested on devices with API level 16 and 17.

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