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heron | a peer 2 peer , distributed , storage and indexing facility

 by   ecausarano Java Version: Current License: No License

 by   ecausarano Java Version: Current License: No License

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kandi X-RAY | heron Summary

heron is a Java library typically used in Networking applications. heron has no bugs, it has build file available and it has high support. However heron has 2 vulnerabilities. You can download it from GitHub.
a peer 2 peer, distributed, storage and indexing facility. Heron provides a simple platform for the trusted publication, search and retrieval of data over a P2P network in order to facilitate and encourage peer-reviewed sharing of information.
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Security
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kandi-support Support

  • heron has a highly active ecosystem.
  • It has 14 star(s) with 0 fork(s). There are 4 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 13 open issues and 0 have been closed. On average issues are closed in 1478 days. There are no pull requests.
  • It has a negative sentiment in the developer community.
  • The latest version of heron is current.
heron Support
Best in #Java
Average in #Java
heron Support
Best in #Java
Average in #Java

quality kandi Quality

  • heron has 0 bugs and 0 code smells.
heron Quality
Best in #Java
Average in #Java
heron Quality
Best in #Java
Average in #Java

securitySecurity

  • heron has 2 vulnerability issues reported (1 critical, 1 high, 0 medium, 0 low).
  • heron code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
heron Security
Best in #Java
Average in #Java
heron Security
Best in #Java
Average in #Java

license License

  • heron 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.
heron License
Best in #Java
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heron License
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buildReuse

  • heron 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.
heron Reuse
Best in #Java
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heron Reuse
Best in #Java
Average in #Java
Top functions reviewed by kandi - BETA

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

  • Finds all objects matching the given key .
    • Handles find value request .
      • Create an RSA key ring generator .
        • Extracts a bundle from the given input stream .
          • Sends all nodes .
            • Creates heron data root .
              • Serializes a node .
                • Load statements from a PDDocument .
                  • Initialize the UI .
                    • Create the secondary keys for the given database entry .

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      heron Key Features

                      A distributed hash table (DHT) to store data, metadata and indexes over a peer 2 peer network.

                      A UI to extract metadata, annotate and publish files to the DHT.

                      A UI to issue distributed search queries on the distributed metadata index (filtered by peer signature) and download the results.

                      Cryptographic routines (GPG) to create digital identities, trust relations and manage the social graph of the platform Web of Trust (WOT.)

                      A UI to cryptographically "sign" uploads (such as files, metadata and transactions affecting them) to the DHT.

                      UI elements and a metadata item to represent the peer review process (PUBLISH, RETRACT, ENDORSE, UNENDORSE)

                      A UI to draft and publish new metadata collections and format definitions, maps, overlays, comments, stories…​

                      Set cell value based on other cell's function result by google script

                      copy iconCopydownload iconDownload
                      function createTrigger() {
                        ScriptApp.newTrigger('updateStatus').timeBased().everyMinutes(30).create();
                      }
                      
                      function updateStatus() {
                        var dataRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("main")
                          .getDataRange();
                        var statusRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("main")
                          .getRange("B:B");
                        var data = dataRange.getValues();
                        var newData = []
                        for (var i = 0; i < data.length; i++) {
                          if (data[i][2] > 0) {
                            data[i][1] = "UP";
                          }
                          newData.push(new Array(data[i][1]));
                        }
                        statusRange.setValues(newData);
                      }
                      

                      Trigonometry in C

                      copy iconCopydownload iconDownload
                      float EPSILON = 0.1
                      x = sqrt(((P-b)*(P-c))/(EPSILON+P*(P-a)));
                      
                      // That's the formula to calculate the semi perimeter of a triangle
                      // given the length of its sides a, b and c.
                      s = ((a + b + c) / 2);
                      
                      // Defining P as the area from Heron's formula
                      P = sqrt(s * (s - a) * (s - b) * (s - c));
                      
                      x = sqrt(((P - b) * (P - c)) / (P * (P - a)));
                      //         ^         ^          ^    ^           You should use 's' instead. 
                      
                      // That's the formula to calculate the semi perimeter of a triangle
                      // given the length of its sides a, b and c.
                      s = ((a + b + c) / 2);
                      
                      // Defining P as the area from Heron's formula
                      P = sqrt(s * (s - a) * (s - b) * (s - c));
                      
                      x = sqrt(((P - b) * (P - c)) / (P * (P - a)));
                      //         ^         ^          ^    ^           You should use 's' instead. 
                      

                      Incorrect Output from loop function (For and While)

                      copy iconCopydownload iconDownload
                      def square_root_for(a, x0, max_iter = 10, tol=1e-14):  
                          x = [x0]
                          x.append(0.5*(x0 + a/x0))
                        
                          print('Iteration | Estimate         | Relative Change')
                          print('-------------------------------------------------')
                          
                          for i in range(1, max_iter):
                              change = (abs(x[i] - x[i-1]) / x[i-1])
                              print('{}         | {:.14f} | {:.16f}'.format(i, x[i], change))
                              if change > tol:
                                  x.append(1/2 * (x[i] + (a / x[i])))
                              else:
                                  break
                          return(x[i])
                      
                      >>> square_root_for(5, 5, 100, 1e-15)
                      Iteration | Estimate         | Relative Change
                      -------------------------------------------------
                      1         | 3.00000000000000 | 0.4000000000000000
                      2         | 2.33333333333333 | 0.2222222222222222
                      3         | 2.23809523809524 | 0.0408163265306123
                      4         | 2.23606889564336 | 0.0009053870529653
                      5         | 2.23606797749998 | 0.0000004106060359
                      6         | 2.23606797749979 | 0.0000000000000842
                      7         | 2.23606797749979 | 0.0000000000000000
                      Final estimate using square_root_for is 2.23606797749979
                      
                      def square_root_for(a, first_guess, max_iter=10, tol=1e-14):
                          print('Iteration | Estimate         | Relative Change')
                          print('-------------------------------------------------')
                      
                          # put a and the first guess in a list
                          guesses = [a, first_guess]
                          # loop for a maximum of max_iter times
                          for i in range(1, max_iter):
                              # add a new guess to the end of the list
                              guesses.append(1 / 2 * (guesses[i] + (a / guesses[i])))
                              # compute the relative change between the last guess [-1] and the one before [-2]
                              change = abs(guesses[-1] - guesses[-2]) / guesses[-2]
                              print('{}         | {:.14f} | {:.16f}'.format(i, guesses[-1], change))
                              # stop if the change is at or below tol
                              if change <= tol:
                                  break
                          # return the last guess in the list as the result
                          return guesses[-1]
                      

                      searching list of objects by key and returning count

                      copy iconCopydownload iconDownload
                      //Group by type and then storing the count
                      const grouped = allObs.reduce((p, c) => {
                          p[c.type] = p[c.type] || 0;
                          p[c.type] += 1;
                          return p;
                      }, {});
                      
                      // putting that into a result array.
                      const result = lookupTable
                          .filter(entry=>grouped[entry._id]) //filtering whatever is not there
                          .map(entry => {
                              return { name: entry.type, data: [grouped[entry._id]] }
                          });
                      
                      [ { name: 'duck', data: [ 2 ] }, { name: 'crane', data: [ 1 ] } ]
                      
                      //Group by type and then storing the count
                      const grouped = allObs.reduce((p, c) => {
                          p[c.type] = p[c.type] || 0;
                          p[c.type] += 1;
                          return p;
                      }, {});
                      
                      // putting that into a result array.
                      const result = lookupTable
                          .filter(entry=>grouped[entry._id]) //filtering whatever is not there
                          .map(entry => {
                              return { name: entry.type, data: [grouped[entry._id]] }
                          });
                      
                      [ { name: 'duck', data: [ 2 ] }, { name: 'crane', data: [ 1 ] } ]
                      

                      Simplify Recursive Function

                      copy iconCopydownload iconDownload
                      def heron(n):
                          if n == 0:
                              return 2
                          else:
                              h = heron(n - 1)
                              return 0.5 * h + 3 / h
                      
                      from functools import cache
                      
                      @cache
                      def heron(n):
                          if n==0:
                              return 2
                          else:
                              h = heron(n-1)
                              return 0.5 * h + (3 / h)
                      
                      def heron(n):
                          if n==0:
                              return 2
                          else:
                              heronPrev = heron(n-1)
                              return 0.5 * heronPrev + 3 / heronPrev
                      

                      if statement calls out out to one function only, why?

                      copy iconCopydownload iconDownload
                      if user_input == 'ADD' or 1:
                      
                          if user_input == 'ADD' or user_input == '1':
                      
                      if user_input in ['ADD', '1']:
                      
                      if number in [2, 3, 5, 7, 11, 13, 17, 19]:
                          print(f"{number} is a prime under twenty")
                      
                      >>> True or 'hello'
                      True
                      
                      >>> False or 'hello'
                      'hello'
                      
                      if user_input == 'ADD' or 1:
                      
                          if user_input == 'ADD' or user_input == '1':
                      
                      if user_input in ['ADD', '1']:
                      
                      if number in [2, 3, 5, 7, 11, 13, 17, 19]:
                          print(f"{number} is a prime under twenty")
                      
                      >>> True or 'hello'
                      True
                      
                      >>> False or 'hello'
                      'hello'
                      
                      if user_input == 'ADD' or 1:
                      
                          if user_input == 'ADD' or user_input == '1':
                      
                      if user_input in ['ADD', '1']:
                      
                      if number in [2, 3, 5, 7, 11, 13, 17, 19]:
                          print(f"{number} is a prime under twenty")
                      
                      >>> True or 'hello'
                      True
                      
                      >>> False or 'hello'
                      'hello'
                      
                      if user_input == 'ADD' or 1:
                      
                          if user_input == 'ADD' or user_input == '1':
                      
                      if user_input in ['ADD', '1']:
                      
                      if number in [2, 3, 5, 7, 11, 13, 17, 19]:
                          print(f"{number} is a prime under twenty")
                      
                      >>> True or 'hello'
                      True
                      
                      >>> False or 'hello'
                      'hello'
                      
                      if user_input == 'ADD' or 1:
                      
                          if user_input == 'ADD' or user_input == '1':
                      
                      if user_input in ['ADD', '1']:
                      
                      if number in [2, 3, 5, 7, 11, 13, 17, 19]:
                          print(f"{number} is a prime under twenty")
                      
                      >>> True or 'hello'
                      True
                      
                      >>> False or 'hello'
                      'hello'
                      
                      if user_input == 'ADD' or 1 :
                      

                      Flink CPU configuration

                      copy iconCopydownload iconDownload
                      env.setParallelism(1)
                      class myMap extends RichMapFunction {
                        override def map(...) = {
                          data.toParArray()... // this is scala concurrent collection, other language has similar ones, like c/cpp OMP, java multi-thread
                        }
                      }
                      
                      

                      Heron's method in haskell

                      copy iconCopydownload iconDownload
                      epsilon:: Fractional a => a
                      epsilon = 1
                      
                      heron:: (Fractional a, Ord a) => a -> a
                      heron r = help 0
                        where
                          help x
                            | abs (heron' x - heron' (x + 1)) < epsilon = heron' (x + 1)
                            | otherwise                                 = help (x + 1)
                      
                          heron' 0 = 1
                          heron' x = (1 / 2) * (heron' (x-1) + (r / heron' (x-1)))
                      

                      Array of Strings some positions are not printing

                      copy iconCopydownload iconDownload
                      static char letters[8][20] = {"Caio\0", "Eduarda\0", "Joanderson\0", "Heron\0", "Thiago\0", "Rafaela\0", "Thalisson\0", "Wilton\0"};
                      
                      char *letters[8] = {"Caio", "Eduarda", "Joanderson", "Heron", "Thiago", "Rafaela", "Thalisson", "Wilton"};
                      
                      static char letters[8][20] = {"Caio\0", "Eduarda\0", "Joanderson\0", "Heron\0", "Thiago\0", "Rafaela\0", "Thalisson\0", "Wilton\0"};
                      
                      char *letters[8] = {"Caio", "Eduarda", "Joanderson", "Heron", "Thiago", "Rafaela", "Thalisson", "Wilton"};
                      
                       #include <stdio.h>
                       #include <stdlib.h>
                      
                       char *switch1(int i)
                       {
                           char **letters = malloc(8 * sizeof(char *));
                      
                           for (int i = 0; i < 8; i++)
                           {
                               letters[i] = malloc(20 * sizeof(char));
                           }
                      
                           letters[0] = "Caio";
                           letters[1] = "Eduarda";
                           letters[2] = "Joanderson";
                           letters[3] = "Heron";
                           letters[4] = "Thiago";
                           letters[5] = "Rafaela";
                           letters[6] = "Thalisson";
                           letters[7] = "Wilton";
                      
                           if ((i >= 0) && (i <= 7))
                           {
                              char *str = letters[i];
                              return (str);
                           }
                           else
                           {
                              return "-";
                           }
                        }
                      
                      int main()
                       {
                          for (int i = 0; i < 8; i++)
                          {
                             printf("%d -- %s \n", i, switch1(i));
                          }
                      
                         return 0;
                       }
                      
                      #include <stdio.h>
                      
                      char *switch1(int i)
                      {
                          static char letters[8][20] = {"Caio", "Eduarda", "Joanderson","Heron","Thiago", "Rafaela", "Thalisson", "Wilton"};
                          if ((i >= 0) && (i <= 7))
                          {
                             char *str = letters[i];
                             return (str);
                          }
                          else
                          {
                             return "-";
                          }
                      }
                      
                      int main()
                      {
                         for (int i = 0; i < 8; i++)
                         {
                           printf("%d -- %s \n", i, switch1(i));
                         }
                      
                         return 0;
                       }
                      
                       #include <stdio.h>
                       #include <stdlib.h>
                      
                       char *switch1(int i)
                       {
                           char **letters = malloc(8 * sizeof(char *));
                      
                           for (int i = 0; i < 8; i++)
                           {
                               letters[i] = malloc(20 * sizeof(char));
                           }
                      
                           letters[0] = "Caio";
                           letters[1] = "Eduarda";
                           letters[2] = "Joanderson";
                           letters[3] = "Heron";
                           letters[4] = "Thiago";
                           letters[5] = "Rafaela";
                           letters[6] = "Thalisson";
                           letters[7] = "Wilton";
                      
                           if ((i >= 0) && (i <= 7))
                           {
                              char *str = letters[i];
                              return (str);
                           }
                           else
                           {
                              return "-";
                           }
                        }
                      
                      int main()
                       {
                          for (int i = 0; i < 8; i++)
                          {
                             printf("%d -- %s \n", i, switch1(i));
                          }
                      
                         return 0;
                       }
                      
                      #include <stdio.h>
                      
                      char *switch1(int i)
                      {
                          static char letters[8][20] = {"Caio", "Eduarda", "Joanderson","Heron","Thiago", "Rafaela", "Thalisson", "Wilton"};
                          if ((i >= 0) && (i <= 7))
                          {
                             char *str = letters[i];
                             return (str);
                          }
                          else
                          {
                             return "-";
                          }
                      }
                      
                      int main()
                      {
                         for (int i = 0; i < 8; i++)
                         {
                           printf("%d -- %s \n", i, switch1(i));
                         }
                      
                         return 0;
                       }
                      

                      Problems with POSIXct in R

                      copy iconCopydownload iconDownload
                      library(lubridate)
                      library(ggplot2)
                      
                      our_data %>% 
                        mutate(timestamp_h = hour(timestamp)) %>% 
                        ggplot(aes(x = timestamp_h)) + geom_histogram(bins = 24) +
                        scale_x_continuous(breaks = 0:12 * 2, limits = c(7, 21))
                      
                      justtime <- function(x, split=12) {
                        h <- as.numeric(strftime(x, "%H"))
                        y <- as.POSIXct(paste(ifelse(h<split, "2015-01-02","2015-01-01"),strftime(x, "%H:%M:%S")))
                      }
                      
                      data.frame(time=justtime(our_data$horacompleta)) %>% 
                        ggplot(aes(x = time)) + geom_histogram(binwidth=3600) + 
                        ylab("nº observacions") + xlab("Hora") +
                        scale_x_datetime(breaks = date_breaks("2 hour"), labels = date_format("%H:%M"),
                                         limits = c(as.POSIXct("2015-01-01 18:00:00"), as.POSIXct("2015-01-02 09:00:00")))
                      

                      Community Discussions

                      Trending Discussions on heron
                      • Set cell value based on other cell's function result by google script
                      • Trigonometry in C
                      • Incorrect Output from loop function (For and While)
                      • searching list of objects by key and returning count
                      • Simplify Recursive Function
                      • if statement calls out out to one function only, why?
                      • Converting a Storm 1 Kafka Topology to Heron, have a few questions
                      • Flink CPU configuration
                      • Heron's method in haskell
                      • Array of Strings some positions are not printing
                      Trending Discussions on heron

                      QUESTION

                      Set cell value based on other cell's function result by google script

                      Asked 2022-Jan-29 at 16:08

                      How to set "status" is 'UP' when the result of column "CountID" change from 0 to >= 1 by google script

                      • I have 2 sheets, main sheet have table below, raw data sheet have raw data auto refresh every hour.

                      • Column "CountID" from main sheet count id from raw data sheet using arrayfomula and CountA function. =arrayformula(COUNTIF('raw data'!A2:A11,A2:A))

                      • In my official spreadsheet, the column index may change therefore, I must use the column header ("Status", "Count") to refer to column position.

                      • "Status" column from main sheet using data validation dropdown list with up to 6 value like: (Cancel, Pending, UP, DOWN, Return ...)

                      • Testing sheet: Testing sheet

                      ID Status CountID
                      a1 UP 1
                      a2 pending 0
                      a3 UP 2
                      a4 UP 5
                      a5 Cancel 0
                      a6 pending 0

                      The code below working and I just upgrade for column header reference to ensure script working when column index change.

                      Thanks
                      Jacques-Guzel Heron.

                      function updateStatus() {
                        var sheet = SpreadsheetApp.getActiveSheet()
                        var headers = sheet.getRange(1,1,1,sheet.getLastColumn()).getValues()[0];
                        var status_col = headers.indexOf('Status');
                        var countid_col = headers.indexOf('CountID');
                      
                        var dataRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("main")
                          .getDataRange();
                        var statusRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("main")
                          .getRange(1,status_col+1,sheet.getLastRow(),1);
                      var data = dataRange.getValues();
                        var newData = []
                        for (var i = 0; i < data.length; i++) {
                          if (data[i][countid_col] > 0) {
                            data[i][status_col] = "UP";
                          }
                          newData.push(new Array(data[i][status_col]));
                          Logger.log(countid_col);
                        }
                        statusRange.setValues(newData);
                      }

                      ANSWER

                      Answered 2022-Jan-27 at 11:16

                      You can develop a fast Apps Script project easily to update the Status column of your Sheet by using installable triggers. I will show you how in the example below. I chose to run the trigger every half an hour with the everyMinutes method, but you can adapt it to your needs. First you would have to run the createTrigger function once to create the trigger. Then the function updateStatus will run automatically every half hour. Please check the SpreadsheetApp class to learn more about the applied methods.

                      function createTrigger() {
                        ScriptApp.newTrigger('updateStatus').timeBased().everyMinutes(30).create();
                      }
                      
                      function updateStatus() {
                        var dataRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("main")
                          .getDataRange();
                        var statusRange = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("main")
                          .getRange("B:B");
                        var data = dataRange.getValues();
                        var newData = []
                        for (var i = 0; i < data.length; i++) {
                          if (data[i][2] > 0) {
                            data[i][1] = "UP";
                          }
                          newData.push(new Array(data[i][1]));
                        }
                        statusRange.setValues(newData);
                      }
                      

                      Please keep in mind that the code above only checks if the CountID column equals to 1 or greater to set up the UP status. Therefore, if the CountID gets lowered to 0 the status will still be UP. Please drop a comment if you need further advice with this approach.

                      Source https://stackoverflow.com/questions/70874888

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

                      Vulnerabilities

                      CVE-2020-1964 CRITICAL
                      It was noticed that Apache Heron 0.20.2-incubating, Release 0.20.1-incubating, and Release v-0.20.0-incubating does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerabilities (CWE-502: Deserialization of Untrusted Data).
                      When accessing the heron-ui webpage, people can modify the file paths outside of the current container to access any file on the host. Example woule be modifying the parameter path= to go to the directory you would like to view. i.e. ..%2F..%2F..%2F..%2F..%2F..%2Fetc%2Fpasswd.

                      Install heron

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