CBoard | service open BI reporting and BI dashboard platform | SQL Database library

 by   TuiQiao JavaScript Version: v0.4.1 License: Apache-2.0

kandi X-RAY | CBoard Summary

CBoard is a JavaScript library typically used in Database, SQL Database applications. CBoard has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.
CBoard is not only a analysis platform that supports interactive multi-dimensional report design and data analysis for user, but also a BI product development platform for developer. Powered by Shanhai Chuguo Information and Technology Co., Ltd.
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                        summary
                        CBoard has a medium active ecosystem.
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                        It has 2925 star(s) with 1165 fork(s). There are 279 watchers for this library.
                        summary
                        It had no major release in the last 6 months.
                        summary
                        There are 98 open issues and 501 have been closed. On average issues are closed in 29 days. There are 1 open pull requests and 0 closed requests.
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                        It has a neutral sentiment in the developer community.
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                        The latest version of CBoard is v0.4.1
                        CBoard Support
                          Best in #SQL Database
                            Average in #SQL Database
                            CBoard Support
                              Best in #SQL Database
                                Average in #SQL Database

                                  kandi-Quality Quality

                                    summary
                                    CBoard has 0 bugs and 0 code smells.
                                    CBoard Quality
                                      Best in #SQL Database
                                        Average in #SQL Database
                                        CBoard Quality
                                          Best in #SQL Database
                                            Average in #SQL Database

                                              kandi-Security Security

                                                summary
                                                CBoard has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
                                                summary
                                                CBoard code analysis shows 0 unresolved vulnerabilities.
                                                summary
                                                There are 0 security hotspots that need review.
                                                CBoard Security
                                                  Best in #SQL Database
                                                    Average in #SQL Database
                                                    CBoard Security
                                                      Best in #SQL Database
                                                        Average in #SQL Database

                                                          kandi-License License

                                                            summary
                                                            CBoard is licensed under the Apache-2.0 License. This license is Permissive.
                                                            summary
                                                            Permissive licenses have the least restrictions, and you can use them in most projects.
                                                            CBoard License
                                                              Best in #SQL Database
                                                                Average in #SQL Database
                                                                CBoard License
                                                                  Best in #SQL Database
                                                                    Average in #SQL Database

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                                                                        summary
                                                                        CBoard releases are not available. You will need to build from source code and install.
                                                                        summary
                                                                        It has 112669 lines of code, 1111 functions and 720 files.
                                                                        summary
                                                                        It has medium code complexity. Code complexity directly impacts maintainability of the code.
                                                                        CBoard Reuse
                                                                          Best in #SQL Database
                                                                            Average in #SQL Database
                                                                            CBoard Reuse
                                                                              Best in #SQL Database
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                                                                                  Top functions reviewed by kandi - BETA
                                                                                  kandi has reviewed CBoard and discovered the below as its top functions. This is intended to give you an instant insight into CBoard implemented functionality, and help decide if they suit your requirements.
                                                                                  • Plot class for plot elements
                                                                                    • Creates a mask for the modal set .
                                                                                      • Initialize Event Manager
                                                                                        • Constructs a new calendar .
                                                                                          • Creates a new Slider .
                                                                                            • Creates a new range object .
                                                                                              • Render the header
                                                                                                • Update the mask and maskets the result set .
                                                                                                  • D3 - > D3
                                                                                                    • Generate an array of masks based on the input parameters .
                                                                                                      Get all kandi verified functions for this library.
                                                                                                      Get all kandi verified functions for this library.

                                                                                                      CBoard Key Features

                                                                                                      Simple and beautiful interface and layout
                                                                                                      Interactive, drag-and-drop OLAP classisc report development experience
                                                                                                      One dataset, multiple report widgets. Maximize reuse query result
                                                                                                      Cube level data refresh / realtime chart for quick query
                                                                                                      Role Based Access Control
                                                                                                      More than 20 chart types and dashboard insight or email report
                                                                                                      Multiple types data source connection Support JDBC data connection (Almost all kinds database that has implemented JDBC protocal) Support Native Elasticsearch connection for version 1.x, 2.x, 5.x Support Native Kylin connection for version 1.6
                                                                                                      Lightweight architecture and concise source code, the entire project does not rely on any third-party multi-dimensional analysis tools, if you are struggling in Mondrain, CBoard could be a nice alternative for you.
                                                                                                      Easy to implement your own DataProvider to connect any data source. Even for expensive commercial BI suite, it's not possible to connect all the NOSQL and NewSQL data source in the era of big data. Due to the schema of NOSQL are various, such as hash tables, arrays, trees, maps, etc., different people using the same NoSQL products designed Schema may vary widely. The user who most familiar with their storage schema are the user themselves. And it's easy to find a Java programmers to code a Class to connect their own data source. So we leave this part of work to the end user with an easy extended data connection framework in CBoard

                                                                                                      CBoard Examples and Code Snippets

                                                                                                      No Code Snippets are available at this moment for CBoard.
                                                                                                      Community Discussions

                                                                                                      Trending Discussions on CBoard

                                                                                                      How do I find the RAM usage of a process using its ID?
                                                                                                      chevron right
                                                                                                      C++ dll in subfolder
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                                                                                                      QUESTION

                                                                                                      How do I find the RAM usage of a process using its ID?
                                                                                                      Asked 2021-May-10 at 14:05

                                                                                                      I am really new to this Kernel stuff. I went here and I found this code that outputs process information like its ID.

                                                                                                      main.c:

                                                                                                      #include 
                                                                                                      #include 
                                                                                                      #include 
                                                                                                      #include 
                                                                                                      #include 
                                                                                                       
                                                                                                       
                                                                                                      struct task_struct *task;        /*    Structure defined in sched.h for tasks/processes    */
                                                                                                      struct task_struct *task_child;        /*    Structure needed to iterate through task children    */
                                                                                                      struct list_head *list;            /*    Structure needed to iterate through the list in each task->children struct    */
                                                                                                       
                                                                                                      int iterate_init(void)                    /*    Init Module    */
                                                                                                      {
                                                                                                          printk(KERN_INFO "%s","LOADING MODULE\n");    /*    good practice to log when loading/removing modules    */
                                                                                                           
                                                                                                          for_each_process( task ){            /*    for_each_process() MACRO for iterating through each task in the os located in linux\sched\signal.h    */
                                                                                                              printk(KERN_INFO "\nPARENT PID: %d PROCESS: %s STATE: %ld",task->pid, task->comm, task->state);/*    log parent id/executable name/state    */
                                                                                                              list_for_each(list, &task->children){                        /*    list_for_each MACRO to iterate through task->children    */
                                                                                                       
                                                                                                                  task_child = list_entry( list, struct task_struct, sibling );    /*    using list_entry to declare all vars in task_child struct    */
                                                                                                           
                                                                                                                  printk(KERN_INFO "\nCHILD OF %s[%d] PID: %d PROCESS: %s STATE: %ld",task->comm, task->pid, /*    log child of and child pid/name/state    */
                                                                                                                      task_child->pid, task_child->comm, task_child->state);
                                                                                                              }
                                                                                                              printk("-----------------------------------------------------");    /*for aesthetics*/
                                                                                                          }    
                                                                                                           
                                                                                                       
                                                                                                          return 0;
                                                                                                       
                                                                                                      }                /*    End of Init Module    */
                                                                                                           
                                                                                                      void cleanup_exit(void)        /*    Exit Module    */
                                                                                                      {
                                                                                                       
                                                                                                       
                                                                                                          printk(KERN_INFO "%s","REMOVING MODULE\n");
                                                                                                       
                                                                                                      }                /*    End of Exit Module    */
                                                                                                       
                                                                                                      module_init(iterate_init);    /*    Load Module MACRO    */
                                                                                                      module_exit(cleanup_exit);    /*    Remove Module MACRO    */
                                                                                                       
                                                                                                      MODULE_LICENSE("GPL");
                                                                                                      MODULE_DESCRIPTION("ITERATE THROUGH ALL PROCESSES/CHILD PROCESSES IN THE OS");
                                                                                                      MODULE_AUTHOR("Laerehte");
                                                                                                      

                                                                                                      Makefile:

                                                                                                      obj-m += main.o
                                                                                                       
                                                                                                      all:
                                                                                                          make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
                                                                                                       
                                                                                                      clean:
                                                                                                          make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
                                                                                                      

                                                                                                      Executed with ./ins (with chmod +x)

                                                                                                      Code:

                                                                                                      sudo insmod main.ko
                                                                                                      sudo rmmod main
                                                                                                      sudo dmesg -c
                                                                                                      

                                                                                                      I looked up how to find how much memory a process uses, and I found this question: Memory usage of current process in C.

                                                                                                      Correct me if I'm wrong here, but I'm thinking that you can read the current RAM usage of these processes by looking in /proc/[process_id]/status. I found out from another place(forgot where) that within this file, there is something called VmRSS that would hold the current RAM usage of the process.

                                                                                                      You can apparently use:

                                                                                                      ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos);
                                                                                                      

                                                                                                      to read a file, but I have not been able to modify main.c with this successfully. I need to find the size of the file, but I also have not been able to use vfs_stat correctly. When I just try some constant integer, I get all 0s in the buffer anyway. I don't know how to use these functions properly. I'm trying to modify main.c so that I will see the RAM usage of these processes along with the other information. Much of the information I found was outdated. Can anyone help?

                                                                                                      ANSWER

                                                                                                      Answered 2021-May-10 at 14:05

                                                                                                      While you can technically open and read files from kernel space, it's usually a bad idea for multiple reasons. Whatever information is provided under /proc is already available to the kernel, you just need to figure out where it is and how to obtain it, and you will be able to do everything in your module without reading any file.

                                                                                                      You are interested in knowing how much RAM is a particular process using given its PID, and you are correct that this statistic is available in /proc//status: in fact, it is labeled as "VmRSS" which means "virtual memory resident set size". If we take a look at the kernel source code, we can see exactly how that number is calculated:

                                                                                                      The kernel function called when reading /proc//status is proc_pid_status() in fs/proc/array.c, which then calls (among the other things) task_mem().

                                                                                                          // ...
                                                                                                          anon = get_mm_counter(mm, MM_ANONPAGES);
                                                                                                          file = get_mm_counter(mm, MM_FILEPAGES);
                                                                                                          shmem = get_mm_counter(mm, MM_SHMEMPAGES);
                                                                                                          // ...
                                                                                                          hiwater_rss = total_rss = anon + file + shmem;
                                                                                                          // ...
                                                                                                          SEQ_PUT_DEC(" kB\nVmHWM:\t", hiwater_rss);
                                                                                                          SEQ_PUT_DEC(" kB\nVmRSS:\t", total_rss); // <===== here it is
                                                                                                          SEQ_PUT_DEC(" kB\nRssAnon:\t", anon);
                                                                                                          // ...
                                                                                                      

                                                                                                      You can therefore obtain this information in the same way. First get ahold of the task_struct of the process you want to check, then inspect the ->mm field like get_mm_counter() does, or simply using get_mm_rss() from include/linux/mm.h, which does exactly what we want.

                                                                                                      Note that:

                                                                                                      1. The value obtained from get_mm_counter() or get_mm_rss() is the number of pages, you will have to multiply this by the page size (simply shift left by PAGE_SHIFT).
                                                                                                      2. You will only be able to do this if your kernel was compiled with MMU support (CONFIG_MMU=y), you can check this in your module code with a simple #ifdef or #ifndef.

                                                                                                      Here's a working example module to do this for all processes:

                                                                                                      // SPDX-License-Identifier: GPL-3.0
                                                                                                      #include        // printk(), pr_*()
                                                                                                      #include        // THIS_MODULE, MODULE_VERSION, ...
                                                                                                      #include          // module_{init,exit}
                                                                                                      #include    // struct task_struct, {get,put}_task_struct()
                                                                                                      #include  // for_each_process()
                                                                                                      #include            // get_mm_rss()
                                                                                                      
                                                                                                      /* Tested on kernel 5.6, qemu-system-aarch64
                                                                                                       * Usage: sudo insmod task_rss
                                                                                                       *        sudo modprobe task_rss
                                                                                                       */
                                                                                                      
                                                                                                      #ifdef pr_fmt
                                                                                                      #undef pr_fmt
                                                                                                      #endif
                                                                                                      #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
                                                                                                      
                                                                                                      static int __init modinit(void)
                                                                                                      {
                                                                                                          struct task_struct *tsk;
                                                                                                          unsigned long rss;
                                                                                                      
                                                                                                      #ifndef CONFIG_MMU
                                                                                                          pr_err("No MMU, cannot calculate RSS.\n");
                                                                                                          return -EINVAL;
                                                                                                      #endif
                                                                                                      
                                                                                                          for_each_process(tsk) {
                                                                                                              get_task_struct(tsk);
                                                                                                      
                                                                                                              // https://www.kernel.org/doc/Documentation/vm/active_mm.rst
                                                                                                              if (tsk->mm) {
                                                                                                                  rss = get_mm_rss(tsk->mm) << PAGE_SHIFT;
                                                                                                                  pr_info("PID %d (\"%s\") VmRSS = %lu bytes\n", tsk->pid, tsk->comm, rss);
                                                                                                              } else {
                                                                                                                  pr_info("PID %d (\"%s\") is an anonymous process\n", tsk->pid, tsk->comm);
                                                                                                              }
                                                                                                      
                                                                                                              put_task_struct(tsk);
                                                                                                          }
                                                                                                      
                                                                                                          return 0;
                                                                                                      }
                                                                                                      
                                                                                                      static void __exit modexit(void)
                                                                                                      {
                                                                                                          // This function is only needed to be able to unload the module.
                                                                                                      }
                                                                                                      
                                                                                                      module_init(modinit);
                                                                                                      module_exit(modexit);
                                                                                                      MODULE_VERSION("0.1");
                                                                                                      MODULE_DESCRIPTION("Silly test module to calculare task RSS of all running tasks.");
                                                                                                      MODULE_AUTHOR("Marco Bonelli");
                                                                                                      MODULE_LICENSE("GPL");
                                                                                                      

                                                                                                      Output on my machine (qemu-system-aarch64):

                                                                                                      / # insmod task_rss.ko
                                                                                                      [    7.306284] task_rss: loading out-of-tree module taints kernel.
                                                                                                      [    7.312912] task_rss: PID 1 ("init") VmRSS = 4096 bytes
                                                                                                      [    7.313295] task_rss: PID 2 ("kthreadd") is an anonymous process
                                                                                                      [    7.314039] task_rss: PID 3 ("rcu_gp") is an anonymous process
                                                                                                      ...
                                                                                                      [    7.330169] task_rss: PID 146 ("sh") VmRSS = 1363968 bytes
                                                                                                      [    7.330554] task_rss: PID 147 ("insmod") VmRSS = 1339392 bytes
                                                                                                      

                                                                                                      Source https://stackoverflow.com/questions/67224020

                                                                                                      QUESTION

                                                                                                      C++ dll in subfolder
                                                                                                      Asked 2020-Apr-23 at 11:00

                                                                                                      I'm trying to write an ActiveX plugin, and I'm finding myself in a dead end when trying to load DLLs from subfolders. I am developing in Visual Studio 2013 for Windows 10.

                                                                                                      The structure of the libraries is as follows:

                                                                                                      myocx.ocx --> this is the compiled result
                                                                                                      mylibs/
                                                                                                        mainlib.lib
                                                                                                        maindll.dll
                                                                                                        rest-of-dlls.dll
                                                                                                      

                                                                                                      I do not load the DLLs directly in my code, instead they are used by the "mainlib.lib" library. I have tried to set in "Additional dependencies" of the VS Linker the path to the mainlib.lib file, and it fails to register my plugin. If I specify "maindll.dll" as a delayed load DLL, then it compiles, but the plugin does not work (it fails at some point in delayhlp.cpp).

                                                                                                      I have read the following posts:

                                                                                                      And the following docs from Microsoft:

                                                                                                      I tried to add the path to the libraries to my system's PATH environment variable, but for some reason it does not work on some PCs.

                                                                                                      I also have tried the manifest way (as described in the first linked question), but looks like VS is completely ignoring it since I can write whatever there and it will fail no matter what.

                                                                                                      If I put the DLLs in the same folder as the plugin, it will work, but I really need to put them in a subfolder because of compatibility issues, so that option is discarded.

                                                                                                      I do not mind using dynamic loading, but I do not know if this is possible since the DLLs are not loaded inside my code, but in a .lib file instead. I do not mind modifying PATH variable either, but as I said, in some Windows installations it is failing.

                                                                                                      Anyone can shed some light on this, in addition to what the linked posts say?

                                                                                                      ANSWER

                                                                                                      Answered 2020-Apr-23 at 11:00

                                                                                                      After pulling my hair A LOT, I managed to solve it using a combination of the above links.

                                                                                                      In Visual Studio, I added in the "Linker" section the path to the libraries, and added mainlib.lib to the dependencies. Then, I added maindll.dll to the delayed load DLLs, and in the code (main class, right after imports) I added the following:

                                                                                                      #pragma comment(lib, "mainlib.lib")
                                                                                                      

                                                                                                      And then in the class initializer, I added the following:

                                                                                                      SetDllDirectory("absolute_path_to_my_DLLs_folder")
                                                                                                      

                                                                                                      Then the .ocx plugin was able to compile and register using regsvr32, and it did not fail at execution time.

                                                                                                      Source https://stackoverflow.com/questions/61364399

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

                                                                                                      Vulnerabilities

                                                                                                      No vulnerabilities reported

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                                                                                                      Multiple kinds of data source plugins. Drag-and-drop self-service multidimensional analysis. More than 20 kinds of chart type. :white_check_mark: + 明细表 + GIS中国地图. Layout by row and column, view and design are seperated. Free layout and live preview. Add date range filter, checkbox, searchable dropdown selector filter, keyword input filter. Design for developers, simple support based on raw data columns. Design for data analyst, complete chart linkage mechanism to support linkage to datasets, billboards. :x: All charts must first be saved and managed in the Widget Config design area. Support insert inline chart in dashboard. Cusomize sort dimension members. More powerful and easy to use. GIS Map chart on detail data. :star::star: Data cell level control and support role based data access control. Folder based resource managment system. :x: Only support virtual path based folder. OS likly file system solution. ACL can be managed by folder. :star::star: Supports advanced calculations such as year-on-year, aspect ratio, percentage, totals, subtotals, cell conditional styles. Iframe external system integration with parameter control. VueJS + ES6 + Webpack. :white_check_mark: Escort your production environment. :white_check_mark: + 明细表 + GIS中国地图. VueJS + ES6 + Webpack,优化首页加载速度,更适应于云端部署. More enterprise features please access our homepage: 上海楚果信息技术有限公司.
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