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jedis_failover | Failover solution using the Jedis Redis client | Command Line Interface library

 by   officedrop Java Version: Current License: MIT

 by   officedrop Java Version: Current License: MIT

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kandi X-RAY | jedis_failover Summary

jedis_failover is a Java library typically used in Utilities, Command Line Interface applications. jedis_failover has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.
This plugin is an implementation of the behaviour implemented originally at the redis_failover Ruby gem. It's main goal is to make your redis cluster to be highly available by automatically switching over the master status to a server that is available once the real master goes down or removing slaves that are not currently available so that clients don't try to access them. The cluster status data lives in a ZooKeeper server or cluster. Each client process then becomes a NodeManager, that is, a watcher over the overall cluster status. Each NodeManager watches over the Redis cluster and validates the cluster status. They periodically send their current view of the system to ZooKeeper and one of them is selected as the cluster leader and he is the one that makes the final decision if a node is down or if there is a need to switch the master to a different server (and also makes the configuration changes on Redis as expected).
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kandi-support Support

  • jedis_failover has a low active ecosystem.
  • It has 32 star(s) with 17 fork(s). There are 8 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 0 open issues and 1 have been closed. On average issues are closed in 1 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of jedis_failover is current.
jedis_failover Support
Best in #Command Line Interface
Average in #Command Line Interface
jedis_failover Support
Best in #Command Line Interface
Average in #Command Line Interface

quality kandi Quality

  • jedis_failover has 0 bugs and 0 code smells.
jedis_failover Quality
Best in #Command Line Interface
Average in #Command Line Interface
jedis_failover Quality
Best in #Command Line Interface
Average in #Command Line Interface

securitySecurity

  • jedis_failover has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • jedis_failover code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
jedis_failover Security
Best in #Command Line Interface
Average in #Command Line Interface
jedis_failover Security
Best in #Command Line Interface
Average in #Command Line Interface

license License

  • jedis_failover is licensed under the MIT License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
jedis_failover License
Best in #Command Line Interface
Average in #Command Line Interface
jedis_failover License
Best in #Command Line Interface
Average in #Command Line Interface

buildReuse

  • jedis_failover 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.
  • jedis_failover saves you 2303 person hours of effort in developing the same functionality from scratch.
  • It has 5031 lines of code, 537 functions and 68 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
jedis_failover Reuse
Best in #Command Line Interface
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jedis_failover Reuse
Best in #Command Line Interface
Average in #Command Line Interface
Top functions reviewed by kandi - BETA

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

  • Called when nodes have changed .
    • Start the node .
      • Transforms the given byte array to a map of NodeState objects .
        • Selects the total latency for each host .
          • Specify the failover configuration .
            • Determine the difference between two cluster status .
              • Gets the actual failover configuration .
                • Returns the next item .
                  • Borrowed object from pool
                    • Convert the given paths to a path .

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      jedis_failover Key Features

                      Failover solution using the Jedis Redis client.

                      Community Discussions

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                      QUESTION

                      Argparse outputting help text twice

                      Asked 2022-Feb-25 at 21:44

                      After an hour googling, I can't find anybody who has had anything resembling this issue besides myself. I created a command line interface with argparse. Originally I had tried to leverage argparse's built in help text behavior. But my boss isn't satisfied with the default help text, so he is having me write up the full usage/help text in a text file and just display the entire file.

                      For some reason, in a certain case, its outputting the text twice.

                      Here is the basics of how my program is broken down:

                      I have a top level parser. I read in my help text file, set it to a string help_text, and then set "usage=help_text" on the parser. Then I create subparsers (4 of them and then a base case) to create subcommands. Only one of those subparsers has any additional arguments (one positional, one optional). Before I reworked the help text, I had help text for each individual subcommand by using "help=" but now those are all blank. Lastly, I have set up a base case to display the help text whenever no subcommands are given.

                      Here is the behavior I'm getting:

                      When I call the main function with no subcommands and no arguments, my help_text from the text file outputs, and then like 2-3 additional lines of boiler plate I can't seem to get rid of. Also because the word usage appears in my text file, it says "usage: usage"

                      When I call the main command and then type --help, the exact same thing happens as above.

                      When I call the one subcommand that has a required positional argument and I don't include that argument... it spits out the entire help text twice. Right above the second time it prints, it prints the default usage line for that subcommand.

                      Lastly, when I use a different subcommand that has no arguments and give it an argument (one too many) it spits out everything completely correctly without even the extra couple lines at the end.

                      I don't know how to make heads or tales about this. Here is the main function of the script (I can verify that this problem occurs only in the main function where argparse is used, not the other functions that the main function calls):

                      def main():
                          # Import help text from file
                          p = Path(__file__).with_name("help_text.txt")
                          with p.open() as file:
                              help_text = file.read()
                      
                          # Configure the top level Parser
                          parser = argparse.ArgumentParser(prog='hubmap-clt', description='Name of cli', usage=help_text)
                          subparsers = parser.add_subparsers()
                      
                          # Create Subparsers to give subcommands
                          parser_transfer = subparsers.add_parser('subcommandone')
                          parser_transfer.add_argument('argument1', type=str)
                          parser_transfer.add_argument('--optionalargument', default='mydefault')
                          parser_login = subparsers.add_parser('subcommandtwo')
                          parser_whoami = subparsers.add_parser('subcommandthree')
                          parser_logout = subparsers.add_parser('subcommandfour')
                      
                          # Assign subparsers to their respective functions
                          parser_subcommandone.set_defaults(func=subcommandone)
                          parser_subcommandtwo.set_defaults(func=subcommandtwo)
                          parser_subcommandthree.set_defaults(func=subcommandthree)
                          parser_subcommandfour.set_defaults(func=subcommandfour)
                          parser.set_defaults(func=base_case)
                      
                          # Parse the arguments and call appropriate functions
                          args = parser.parse_args()
                          if len(sys.argv) == 1:
                              args.func(args, parser)
                          else:
                              args.func(args)
                      

                      So to clarify:

                      Why does the extra couple lines of boiler-plat help text appear sometimes which looks like this:

                       name of cli
                      
                       positional arguments:
                           {subcommandone,subcommandtwo,subcommandthree,subcommandfour}
                      
                       optional arguments:
                          -h, --help            show this help message and exit
                      

                      Why does using subcommandone with too few arguments print out the help text twice (but NOT the extra lines of boiler-plate help text.

                      why does using subcommandtwo with one too MANY arguments print everything perfectly without any extra lines?

                      ANSWER

                      Answered 2022-Feb-25 at 21:44

                      With a modification of your main:

                      def foo():
                          # Import help text from file
                          # p = Path(__file__).with_name("help_text.txt")
                          # with p.open() as file:
                          #    help_text = file.read()
                          help_text = "cli usage: foobar\n morebar"
                      
                          # Configure the top level Parser
                          parser = argparse.ArgumentParser(
                              prog="hubmap-clt", description="Name of cli", usage=help_text
                          )
                          subparsers = parser.add_subparsers()
                      
                          # Create Subparsers to give subcommands
                          parser_transfer = subparsers.add_parser("subcommandone")
                          parser_transfer.add_argument("argument1", type=str)
                          parser_transfer.add_argument("--optionalargument", default="mydefault")
                          parser_login = subparsers.add_parser("subcommandtwo")
                          # parser_whoami = subparsers.add_parser("subcommandthree")
                          # parser_logout = subparsers.add_parser("subcommandfour")
                      
                          # Assign subparsers to their respective functions
                          parser_transfer.set_defaults(func="subcommandone")
                          parser_login.set_defaults(func="subcommandtwo")
                          # parser_subcommandthree.set_defaults(func="subcommandthree")
                          # parser_subcommandfour.set_defaults(func="subcommandfour")
                          parser.set_defaults(func="base_case")
                      
                          return parser
                      

                      in an iteractive ipython session:

                      In [8]: p = foo()
                      
                      In [9]: p.print_usage()
                      usage: cli usage: foobar
                       morebar
                      

                      Usage is exactly as I specified. And the help for the main parser:

                      In [10]: p.print_help()
                      usage: cli usage: foobar
                       morebar
                      
                      Name of cli
                      
                      positional arguments:
                        {subcommandone,subcommandtwo}
                      
                      optional arguments:
                        -h, --help            show this help message and exit
                      

                      That's what I expect given the arguments.

                      Help for a subparser:

                      In [11]: p.parse_args(["subcommandone", "-h"])
                      usage: cli usage: foobar
                       morebar subcommandone [-h] [--optionalargument OPTIONALARGUMENT] argument1
                      
                      positional arguments:
                        argument1
                      
                      optional arguments:
                        -h, --help            show this help message and exit
                        --optionalargument OPTIONALARGUMENT
                      

                      Usage is like the main's but with some added info on how to call this subparser and its arguments.

                      Error when calling the subparsers without enough values:

                      In [15]: p.parse_args(["subcommandone"])
                      usage: cli usage: foobar
                       morebar subcommandone [-h] [--optionalargument OPTIONALARGUMENT] argument1
                      cli usage: foobar
                       morebar subcommandone: error: the following arguments are required: argument1
                      

                      Is this repeat of cli usage that bothering you? This error is raised by the subparser, and I suspect the extra comes from the prog of that subparser. I think I saw something like this on the Python bug/issues for argparse.

                      error with too much:

                      In [17]: p.parse_args(["subcommandone", "test", "extra"])
                      usage: cli usage: foobar
                       morebar
                      hubmap-clt: error: unrecognized arguments: extra
                      

                      In this case error is produced by the main parser, hence the "hubmat-clt" prog.

                      change prog:

                      ...: parser_transfer = subparsers.add_parser( ...: "subcommandone", prog="hubmap-clt sobcommandone" ...: )

                      In [21]: p.parse_args(["subcommandone", "test", "extra"])
                      usage: cli usage: foobar
                       morebar
                      hubmap-clt: error: unrecognized arguments: extra
                      
                      In [22]: p.parse_args(["subcommandone"])
                      usage: hubmap-clt sobcommandone [-h] [--optionalargument OPTIONALARGUMENT] argument1
                      hubmap-clt sobcommandone: error: the following arguments are required: argument1
                      

                      [21] is as before [17]. But [22] is now showing the prog that I set. I could also have specified a custom usage for the subparser.

                      If I modify the function to use default usage and prog, but also display the subparser's prog. And I gave the main an "main_foo" positional argument:

                      In [30]: p = foo()
                      hubmap-clt main_foo subcommandone
                      In [31]: p.parse_args(["subcommandone"])
                      Out[31]: Namespace(main_foo='subcommandone')
                      In [32]: p.parse_args(["foo", "subcommandone"])
                      usage: hubmap-clt main_foo subcommandone [-h] [--optionalargument OPTIONALARGUMENT] argument1
                      hubmap-clt main_foo subcommandone: error: the following arguments are required: argument1
                      

                      Notice how the main's usage has been incorporated into the 'prog' for the subparser.

                      In the bug/issue I found the main parser's usage gets incorporated into the prog of the subparser. That's why you see the duplicate.

                      https://bugs.python.org/issue42297 [argparse] Bad error message formatting when using custom usage text

                      The relatively recent date of this bug issue indicates that custom usage is not that common, and even less so when used with subparsers. As my post on this issue indicates, the relation between the main parser, the "subparsers" command, and individual subparsers gets complicated.

                      Source https://stackoverflow.com/questions/71270655

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

                      Vulnerabilities

                      No vulnerabilities reported

                      Install jedis_failover

                      You can download it from GitHub.
                      You can use jedis_failover 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 jedis_failover 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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