com.wavemaker.runtime.commons.WMAppContext Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (C) 2022-2023 WaveMaker, Inc.
*
* 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.wavemaker.runtime.commons;
import javax.servlet.ServletContext;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.web.context.ServletContextAware;
import com.wavemaker.runtime.prefab.context.PrefabThreadLocalContextManager;
/**
* This singleton class is to store any properties in the scope of the application context and its prefabs context.
*
* @author Seung Lee
* @author Jeremy Grelle
*/
public class WMAppContext implements ApplicationContextAware, ServletContextAware {
private PrefabThreadLocalContextManager prefabThreadLocalContextManager;
private ApplicationContext rootApplicationContext;
private ServletContext servletContext;
private static WMAppContext instance;
private WMAppContext() {
if (instance == null) {
instance = this;
}
}
public static synchronized WMAppContext getInstance() {
return instance;
}
/**
* Used by old file service java classes
*/
@Deprecated
public ServletContext getContext() {
return servletContext;
}
public T getSpringBean(String beanId) {
ApplicationContext applicationContext = detectCurrentApplicationContext();
return (T) applicationContext.getBean(beanId);
}
public T getSpringBean(Class c) {
ApplicationContext applicationContext = detectCurrentApplicationContext();
return applicationContext.getBean(c);
}
private ApplicationContext detectCurrentApplicationContext() {
PrefabThreadLocalContextManager prefabThreadLocalContextManager = getPrefabThreadLocalContextManager();
ApplicationContext applicationContext = getRootApplicationContext();
if (prefabThreadLocalContextManager != null) {
ApplicationContext context = prefabThreadLocalContextManager.getContext();
if (context != null) {
applicationContext = context;
}
}
return applicationContext;
}
private PrefabThreadLocalContextManager getPrefabThreadLocalContextManager() {
if (prefabThreadLocalContextManager == null) {//Locking not really needed
PrefabThreadLocalContextManager prefabThreadLocalContextManager;
try {
prefabThreadLocalContextManager = getRootApplicationContext()
.getBean(PrefabThreadLocalContextManager.class);
} catch (NoSuchBeanDefinitionException e) {
prefabThreadLocalContextManager = new PrefabThreadLocalContextManager(); //To prevent this method being called every time
}
this.prefabThreadLocalContextManager = prefabThreadLocalContextManager;
}
return prefabThreadLocalContextManager;
}
private ApplicationContext getRootApplicationContext() {
return rootApplicationContext;
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) {
rootApplicationContext = applicationContext;
}
@Override
public void setServletContext(ServletContext servletContext) {
this.servletContext = servletContext;
}
}