Merge pull request #507 from 2pk03/main

wayang REST API start / stop script

Author: kamir

bin/wayang-service.sh

@@ -0,0 +1,125 @@
+#!/usr/bin/env bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# wayang-service: Process Watchdog Script
+#
+# Usage: wayang-service {start|stop|restart|status}
+#
+
+# Get the absolute path of the script
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PID_DIR="$SCRIPT_DIR/pid"
+PID_FILE="$PID_DIR/wayang-service.pid"
+LOG_DIR="$SCRIPT_DIR/logs"
+EXECUTABLE="$SCRIPT_DIR/wayang-submit"
+ARGS="org.apache.wayang.api.json.Main"
+SLEEP_INTERVAL=5
+
+# Ensure necessary directories exist
+mkdir -p "$PID_DIR" "$LOG_DIR"
+
+start_service() {
+  if [ -f "$PID_FILE" ]; then
+    PID=$(cat "$PID_FILE")
+    if kill -0 "$PID" >/dev/null 2>&1; then
+      echo "Wayang-service is already running with PID $PID."
+      exit 1
+    else
+      echo "Removing stale PID file."
+      rm -f "$PID_FILE"
+    fi
+  fi
+
+  echo "Starting Wayang-service..."
+  nohup "$SCRIPT_DIR/$(basename "$0")" run >> "$LOG_DIR/wayang-$(date +'%Y-%m-%d_%H-%M-%S').log" 2>&1 &
+  PID=$!
+  echo $PID > "$PID_FILE"
+  echo "Wayang-service started with PID $PID."
+}
+
+run_service() {
+  while true; do
+    # Define a new log file for each process restart
+    SUB_LOG_FILE="$LOG_DIR/wayang-$(date +'%Y-%m-%d_%H-%M-%S').log"
+    echo "Starting subprocess; logging to $SUB_LOG_FILE"
+    "$EXECUTABLE" $ARGS >> "$SUB_LOG_FILE" 2>&1 &
+    CHILD_PID=$!
+    echo "Subprocess started with PID $CHILD_PID."
+
+    # Wait for the process to exit
+    wait $CHILD_PID
+    EXIT_CODE=$?
+    echo "Subprocess (PID $CHILD_PID) terminated with exit code $EXIT_CODE."
+    echo "Restarting subprocess in $SLEEP_INTERVAL seconds..."
+    sleep $SLEEP_INTERVAL
+  done
+}
+
+stop_service() {
+  if [ -f "$PID_FILE" ]; then
+    PID=$(cat "$PID_FILE")
+    if kill -0 "$PID" >/dev/null 2>&1; then
+      echo "Stopping Wayang-service (PID $PID)..."
+      kill "$PID"
+      sleep 1
+      rm -f "$PID_FILE"
+      echo "Wayang-service stopped."
+    else
+      echo "No process found with PID $PID. Removing stale PID file."
+      rm -f "$PID_FILE"
+    fi
+  else
+    echo "Wayang-service is not running."
+  fi
+}
+
+status_service() {
+  if [ -f "$PID_FILE" ]; then
+    PID=$(cat "$PID_FILE")
+    if kill -0 "$PID" >/dev/null 2>&1; then
+      echo "Wayang-service is running with PID $PID."
+    else
+      echo "PID file exists, but no process with PID $PID is running."
+    fi
+  else
+    echo "Wayang-service is not running."
+  fi
+}
+
+case "$1" in
+  start)
+    start_service
+    ;;
+  run)
+    run_service
+    ;;
+  stop)
+    stop_service
+    ;;
+  restart)
+    stop_service
+    sleep 1
+    start_service
+    ;;
+  status)
+    status_service
+    ;;
+  *)
+    echo "Usage: $0 {start|stop|restart|status}"
+    exit 1
+    ;;
+esac