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Spring-Batch-Talk-2.0 | Spring Batch Talk | Batch Processing library

 by   mminella Java Version: Current License: No License

 by   mminella Java Version: Current License: No License

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kandi X-RAY | Spring-Batch-Talk-2.0 Summary

Spring-Batch-Talk-2.0 is a Java library typically used in Data Processing, Batch Processing applications. Spring-Batch-Talk-2.0 has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.
This repo contains the presentation and example code from the Heavy Lifting in the Cloud with Spring Batch talk. You can view a video of the presentation on YouTube here: [Heavy Lifting in the Cloud with Spring Batch](http://www.youtube.com/watch?v=CYTj5YT7CZU). The example code runs a "vuln scanner" which is really nothing more than a port scanner that stores the banners it receives. Most vulnerability scanners use that banner information to determine if the version of software that replied is vulnerable (based on regexes performed on the banner). To execute the code, you’ll need access to a CloudFoundry installation (CouldFoundry.com is the easiest), VMC installed and Maven 3. The easiest way to run the sample is via deploying with VMC. mvn clean install cf:push -Dcf.appname=partition mvn cf:apps.  — set environment variables via vmc :(.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • Spring-Batch-Talk-2.0 has a low active ecosystem.
  • It has 14 star(s) with 10 fork(s). There are 5 watchers for this library.
  • It had no major release in the last 12 months.
  • Spring-Batch-Talk-2.
  • 0 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 Spring-Batch-Talk-2.0 is current.
This Library - Support
Best in #Batch Processing
Average in #Batch Processing
This Library - Support
Best in #Batch Processing
Average in #Batch Processing

quality kandi Quality

  • Spring-Batch-Talk-2.0 has 0 bugs and 0 code smells.
This Library - Quality
Best in #Batch Processing
Average in #Batch Processing
This Library - Quality
Best in #Batch Processing
Average in #Batch Processing

securitySecurity

  • Spring-Batch-Talk-2.0 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • Spring-Batch-Talk-2.0 code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
This Library - Security
Best in #Batch Processing
Average in #Batch Processing
This Library - Security
Best in #Batch Processing
Average in #Batch Processing

license License

  • Spring-Batch-Talk-2.0 does not have a standard license declared.
  • Check the repository for any license declaration and review the terms closely.
  • Without a license, all rights are reserved, and you cannot use the library in your applications.
This Library - License
Best in #Batch Processing
Average in #Batch Processing
This Library - License
Best in #Batch Processing
Average in #Batch Processing

buildReuse

  • Spring-Batch-Talk-2.0 releases are not available. You will need to build from source code and install.
  • Build file is available. You can build the component from source.
  • Installation instructions are not available. Examples and code snippets are available.
  • Spring-Batch-Talk-2.0 saves you 387 person hours of effort in developing the same functionality from scratch.
  • It has 922 lines of code, 21 functions and 15 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
This Library - Reuse
Best in #Batch Processing
Average in #Batch Processing
This Library - Reuse
Best in #Batch Processing
Average in #Batch Processing
Top functions reviewed by kandi - BETA

kandi has reviewed Spring-Batch-Talk-2.0 and discovered the below as its top functions. This is intended to give you an instant insight into Spring-Batch-Talk-2.0 implemented functionality, and help decide if they suit your requirements.

  • Partitions the grid using the given grid size .
    • Process the input .
      • Execute the INSERT UPDATE .
        • Map a ResultSet to a Target .
          • Gets the port number .
            • Set the IP address
              • The numeric id .
                • Set the table name

                  Get all kandi verified functions for this library.

                  Get all kandi verified functions for this library.

                  Spring-Batch-Talk-2.0 Key Features

                  Execute a maven build: mvn clean install

                  Change directories into the target directory.

                  Select the CloudFoundry target you wish to deploy the application to: `$ cf target https://api.run.pivotal.io` 4. Login to the target you selected `$ cf login` 5. Perform a push, however do not allow CloudFoundry to start the app (we need to set the profile first). `$ cf push p_jobs --path target/partitioningJobs.war --no-start` 6. From the prompts, enter a name, confirm that it is a Spring application, select that we want a java runtime, 512MB of memory. 7. The application requires 2 services, a database and messaging 8. When the wizard promps you to create a service for this application, say yes. 9. Select cleardb from the options and provide a unique name for the service. 10. Repeate steps 8 and 9 for the messaging service (cloudamqp). 11. Choose not to save your configuration. 12. Once the push is complete, you need to indicate that this application will be the master in the master/slave configuration. To do that, set the SPRING_PROFILES_ACTIVE and ENVIRONMENT environment variables with the following command where <APP_NAME> is the applicaiton name you provided in step 6: `$ cf set-env <APP_NAME> SPRING_PROFILES_ACTIVE master $ cf set-env <APP_NAME> ENVIRONMENT mysql`

                  With the application configured, we can start it via: `$ cf start <APP_NAME>` 14. Now you'll be able to open a browser and navigate to <APP_NAME>.cfapps.io. 15. To launch the slave application, repeat steps 5 through 13 with a different application name and activating the slave profile in step 11. 16. To scale the slave application, use the instances command where <SLAVE_APP_NAME> is the name of the slave application deployed in step 15 above: `$ cf scale <SLAVE_APP_NAME> --instances <INSTANCES>` 17. When scaling with CloudFoundry via the scale command, the number of instances is the *total* number instances to be running, not the number to increase/decrease by.

                  Spring-Batch-Talk-2.0 Examples and Code Snippets

                  See all related Code Snippets

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                      `$ cf target https://api.run.pivotal.io`
                  4. Login to the target you selected

                  See all related Code Snippets

                  Community Discussions

                  Trending Discussions on Batch Processing
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                  Trending Discussions on Batch Processing

                  QUESTION

                  How to notify failure in producer-consumer pattern using BlockingCollection?

                  Asked 2022-Mar-19 at 12:59

                  I'm trying to create a lifetime process that batches incoming messages for DB bulk insert. The new message is coming in 1 at a time, in an irregular interval. My solution to this would be something like the producer-consumer pattern using BlockingCollection. Messages are added freely into the BlockingCollection by various events and are taken out of BlockingCollection in bulk for DB insert in regular intervals, 5 seconds.

                  However, the current solution is fire-and-forget. If the bulk insert failed for any reason, I need a way for the processor to notify the original sources of the failure, because the source contains the logic to recover and retry.

                  Is there a specific pattern I should be using for what I'm trying to achieve? Any suggestion or help is much appreciated!

                          private BlockingCollection<Message> _messageCollection;
                  
                          public async Task<bool> InsertMessage(Message message)
                          {
                              if (!_messageCollection.TryAdd(message)) return false;
                  
                              // TODO: check message has been successfully processed, if not return false
                              // return false;
                  
                              return true;
                          }
                  
                          private void BulkInsertProcess()
                          {
                              Task consumerThread = Task.Factory.StartNew(async () =>
                              {
                                  while (!_messageCollection.IsCompleted)
                                  {
                                      List<Message> messages = new List<Message>();
                  
                                      for (int i = 0; i < 50; i++)
                                      {
                                          if (_messageCollection.Any())
                                          {
                                              messages.Add(_messageCollection.Take());
                                          }
                                          else
                                          {
                                              break;
                                          }
                                      }
                  
                                      bool insertResult = await _database.BulkInsertMessages(messages);
                  
                                      // TODO: check result and inform the consumer if insert failed
                  
                                      await Task.Delay(5000);
                                  }
                              });
                          }
                  

                  ANSWER

                  Answered 2022-Mar-19 at 12:59

                  You will have to associate somehow each Message with a dedicated TaskCompletionSource<bool>. You might want to make the second a property of the first:

                  public class Message
                  {
                      public TaskCompletionSource<bool> TCS { get; } = new();
                  }
                  

                  ...or make the first a property of the second:

                  private class Entry : TaskCompletionSource<bool>
                  {
                      public Message Message { get; init; }
                  }
                  

                  ...or create a custom class that contains both, or use a ValueTuple<Message, TaskCompletionSource<bool>> as I've chosen in the example below:

                  private BlockingCollection<(Message, TaskCompletionSource<bool>)> _queue;
                  
                  public Task<bool> InsertMessage(Message message)
                  {
                      var tcs = new TaskCompletionSource<bool>(
                          TaskCreationOptions.RunContinuationsAsynchronously);
                      if (!_queue.TryAdd((message, tcs)))
                          return Task.FromResult(false);
                      return tcs.Task;
                  }
                  
                  private void BulkInsertProcess()
                  {
                      Task consumerTask = Task.Run(async () =>
                      {
                          while (!_queue.IsCompleted)
                          {
                              var delayTask = Task.Delay(5000);
                  
                              var batch = new List<(Message, TaskCompletionSource<bool>)>();
                              while (batch.Count < 50 && _queue.TryTake(out var entry))
                                  batch.Add(entry);
                  
                              if (batch.Count > 0)
                              {
                                  var messages = batch.Select(e => e.Item1).ToList();
                                  bool insertResult = await _database.BulkInsertMessages(messages);
                  
                                  foreach (var (message, tcs) in batch)
                                      tcs.SetResult(insertResult);
                              }
                              await delayTask;
                          }
                      });
                  }
                  

                  I made some improvements to your code, to make it work more smoothly:

                  1. Task.Run instead of Task.Factory.StartNew. The former understands async delegates. The later doesn't.
                  2. TryTake instead of Any. The Any is an extension method on the IEnumerable<T> interface, and these are not guaranteed to be thread-safe. Most probably it's thread-safe, but using a public member of the BlockingCollection<T> class is safer and more efficient.
                  3. Create the Task.Delay before doing the bulk insert operation, and await it afterwards. This way you get a stable interval between subsequent bulk insert operations, that doesn't depend on the duration of the operations themselves.

                  In case you got 50 messages in one batch you might consider skipping the await delayTask altogether, because this indicates that your service is under pressure, and the messages are piling up in the queue.

                  Source https://stackoverflow.com/questions/71536182

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

                  Vulnerabilities

                  No vulnerabilities reported

                  Install Spring-Batch-Talk-2.0

                  You can download it from GitHub.
                  You can use Spring-Batch-Talk-2.0 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 Spring-Batch-Talk-2.0 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

                  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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