Create tomcat_service_restart.sh

Shell_Scripts/server_restart/tomcat_service_restart.sh

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+#!/bin/bash
+
+# Configuration
+SERVICE_NAME="tomcat"
+LOG_FILE="/var/log/tomcat_service.log"
+
+# Logging function
+log_message() {
+    echo "$(date): $1" | tee -a $LOG_FILE
+}
+
+# Functions
+get_tomcat_pid() {
+    echo $(ps -ef | grep '[o]rg.apache.catalina.startup.Bootstrap' | awk '{print $2}')
+}
+
+start_tomcat() {
+    log_message "Starting Tomcat..."
+    if sudo systemctl start $SERVICE_NAME; then
+        sleep 3 # Give it a moment to start
+        local pid=$(get_tomcat_pid)
+        if [[ -n $pid ]]; then
+            log_message "Tomcat started with PID $pid."
+        else
+            log_message "Failed to start Tomcat."
+        fi
+    else
+        log_message "Error executing systemctl start $SERVICE_NAME."
+    fi
+}
+
+stop_tomcat() {
+    local pid=$(get_tomcat_pid)
+    log_message "Stopping Tomcat with PID $pid..."
+    if sudo systemctl stop $SERVICE_NAME; then
+        log_message "Tomcat stopped."
+        # Wait for Tomcat to stop before restarting
+        while sudo systemctl is-active --quiet $SERVICE_NAME; do
+            sleep 1
+        done
+    else
+        log_message "Error executing systemctl stop $SERVICE_NAME."
+    fi
+}
+
+restart_tomcat() {
+    local old_pid=$(get_tomcat_pid)
+    stop_tomcat
+    log_message "Waiting 60 seconds before attempting to start Tomcat..."
+    sleep 60
+    start_tomcat
+    local new_pid=$(get_tomcat_pid)
+    log_message "Tomcat restarted. Old PID was $old_pid. Current PID is $new_pid."
+}
+
+# Main script
+{
+    old_pid=$(get_tomcat_pid)
+    if ! sudo systemctl is-active --quiet $SERVICE_NAME; then 
+        log_message "Tomcat is not running."
+        start_tomcat
+    else 
+        log_message "Tomcat is running with PID $old_pid."
+        restart_tomcat
+    fi
+} || {
+    log_message "An error occurred during the execution of the script."
+}