/*
 * Copyright 2014 Effektif GmbH.
 *
 * Licensed 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.
 */
package com.effektif.workflow.impl;

import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.UUID;


/**
 * @author Tom Baeyens
 */
public class WorkflowEngineConfiguration {

  protected String workflowEngineId;

  public void setWorkflowEngineId(String id) {
    this.workflowEngineId = id;
  }
  
  public String getWorkflowEngineId() {
    if (workflowEngineId==null) {
      workflowEngineId = createDefaultWorkflowEngineId();
    }
    return workflowEngineId;
  }
  
  public static String createDefaultWorkflowEngineId() {
    String id = null;
    try {
      id = InetAddress.getLocalHost().getHostAddress();
      try {
        String processName = ManagementFactory.getRuntimeMXBean().getName();
        int atIndex = processName.indexOf('@');
        if (atIndex > 0) {
          id += ":" + processName.substring(0, atIndex);
        }
      } catch (Exception e) {
        id += ":?";
      }
    } catch (UnknownHostException e1) {
      id = UUID.randomUUID().toString();
    }
    return id;
  }

}