Subversion Repositories SmartDukaan

package com.spice.profitmandi.common.mail;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * Bridges the static mail helpers in Utils to the Spring-managed {@link MailQueue}.
 *
 * This is a deliberate compromise, not a pattern to copy. Utils.sendMail* are
 * static and called from 27 places, several of them static contexts that have no
 * bean to inject into. Converting all of them at once would be a large,
 * mechanical, and risky change to code paths that send real money-related
 * reports. Holding the queue in one place instead lets those helpers stop
 * sending inline today, and lets the call sites move at their own pace.
 *
 * New code must inject {@link MailQueue} directly. Nothing except Utils should
 * read this.
 */
@Component
public final class MailQueueHolder {

    private static final Logger LOGGER = LogManager.getLogger(MailQueueHolder.class);

    private static volatile MailQueue mailQueue;

    @Autowired
    public void setMailQueue(MailQueue queue) {
        mailQueue = queue;
    }

    /**
     * Returns null before the context has finished starting. Callers must handle
     * that rather than assume — a mail sent during startup is better dropped with
     * a log line than allowed to NPE inside a scheduled job.
     */
    public static MailQueue get() {
        if (mailQueue == null) {
            LOGGER.warn("MailQueue requested before the Spring context supplied one; mail dropped");
        }
        return mailQueue;
    }
}