Add launcher scripts and config parser

Author: kamalesh0406

README.md

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+## Leader Election 
+
+This repository contains the implementation of Peleg's leader election algorithm. 

cleanup.sh

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+#!/usr/bin/env bash
+
+
+# Change this to your netid
+netid=kxp210004
+
+
+# Root directory of your project
+PROJECT_DIR=$HOME/Desktop/LeaderElection
+
+
+# Directory where the config file is located on your local system
+CONFIG_LOCAL=$PROJECT_DIR/config.txt
+
+n=0
+
+cat $CONFIG_LOCAL | sed -e "s/#.*//" | sed -e "/^\s*$/d" |
+(
+    read i
+    echo $i
+    while [[ $n -lt $i ]]
+    do
+    	read line
+        host=$( echo $line | awk '{ print $2 }' )
+
+        echo $host
+        osascript -e '
+        tell app "Terminal"
+            do script "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no '$netid@$host' killall -u '$netid'"
+        end tell'
+        sleep 1
+
+        n=$(( n + 1 ))
+    done
+   
+)
+
+
+echo "Cleanup complete"

config.txt

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+# number of nodes in the system
+5
+
+# nodeUID hostName listeningPort
+123 dc02 2234
+5 dc03 3233
+23 dc04 5217
+1047 dc05 2432
+89 dc06 6221
+
+# space delimited list of neighbors for each node
+5 23
+123 1047
+123 1047 89
+5 23 89
+23 1047

launcher-mac.sh

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+#!/usr/bin/env bash
+
+# Change this to your netid
+netid=kxp210004
+
+# Root directory of your project
+PROJECT_DIR=/home/013/k/kx/kxp210004/LeaderElection
+
+# Directory where the config file is located on your local system
+CONFIG_LOCAL=$HOME/Desktop/LeaderElection/config.txt
+
+# Directory your java classes are in
+BINARY_DIR=$PROJECT_DIR/bin
+
+# Your main project class
+PROGRAM=Main
+
+i=0
+
+declare -A uidHostMap
+
+cat $CONFIG_LOCAL | sed -e "s/#.*//" | sed -e "/^\s*$/d" |
+(
+    mapfile -t configFile 
+
+    totalNodes=${configFile[0]}
+    counter=0
+
+    while [[ $counter -lt $totalNodes ]]
+    do
+        line=(${configFile[$((counter))]})
+        uid="${line[0]}"
+        host="${line[1]}"
+        port="${line[2]}"
+
+        uidHostMap[$uid]="$host,$port"
+
+        counter=$((counter + 1))
+    done
+
+    # Uncomment to debug the values in the uidHostMap hashmap.
+    # for key in ${!uidHostMap[@]}; do
+    #     echo ${key} ${uidHostMap[${key}]}
+    # done
+    
+    i=1
+    while [[ $i -lt $totalNodes ]]
+    do
+    	line=(${configFile[$((i))]})
+        uid="${line[0]}"
+        host="${line[1]}"
+        port="${line[2]}"
+
+        echo $uid $host $port
+
+        neighborsArray=(${configFile[$i + totalNodes]})
+        neighCounter=0
+
+        for neighborUID in ${neighborsArray[@]}; do
+            neighborsArray[$neighCounter]=${uidHostMap[${neighborUID}]}
+            neighCounter=$(( neighCounter+1 ))
+        done
+        
+        neighbors=$(printf "_%s" "${neighborsArray[@]}")
+
+        echo "Neighbors ${neighbors}"
+	
+        osascript -e '
+                tell app "Terminal"
+                    do script "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no '$netid@$host' java -cp '$BINARY_DIR' '$PROGRAM' '$uid' '$host' '$port' '$neighbors'"
+                end tell'
+
+        i=$(( i + 1 ))
+    done
+)

src/ConfigParser.java

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+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ConfigParser{
+    public String uid;
+    public String host;
+    public String port;
+    public Map<String, String> neighbors = new HashMap<>();
+
+    ConfigParser(String[] args) {
+        uid = args[0];
+        host = args[1];
+        port = args[2];
+
+        List<String> neighborsDetails = Arrays.asList(args[3].split("_"));
+        neighborsDetails = neighborsDetails.subList(1, neighborsDetails.size());
+
+        for (String detail: neighborsDetails) {
+            String[] detailArray = detail.split(",");
+            neighbors.put(detailArray[0], detailArray[1]);
+        }
+    }
+
+}

src/LeaderElection.java

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+
+public class LeaderElection {
+
+}

src/Main.java

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+
+public class Main {
+    public static void main(String[] args) {
+        ConfigParser config = new ConfigParser(args);
+
+        System.out.println("UID " + config.uid);
+        System.out.println("Host Name " + config.host);
+        System.out.println("Port " + config.port);
+    }
+}