com.flipkart.poseidon.PoseidonContext.java Source code

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Here is the source code for com.flipkart.poseidon.PoseidonContext.java

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/*
 * Copyright 2015 Flipkart Internet, pvt ltd.
 *
 * 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.flipkart.poseidon;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Component;

import java.util.HashSet;
import java.util.Set;

@Component
public class PoseidonContext implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    private static void init() {
        if (applicationContext == null) {
            synchronized (PoseidonContext.class) {
                if (applicationContext == null) {
                    applicationContext = new ClassPathXmlApplicationContext(new String[] { "supervisor.xml" });
                }
            }
        }
    }

    public static <T> T getBean(Class<T> c) {
        init();
        return applicationContext.getBean(c);
    }

    public static <T> Set<T> getBeans(Class<T> c) {
        init();
        return new HashSet<>(applicationContext.getBeansOfType(c).values());
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        PoseidonContext.applicationContext = applicationContext;
    }
}