ImportService.java

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// Copyright (C) 2006-2016 Talend Inc. - www.talend.com
//
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// %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt
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package org.talend.mdm.repository.core.service;

import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * DOC hbhong class global comment. Detailled comment
 */
public class ImportService {

    private static boolean importing = false;

    private static Lock lock = new ReentrantLock();

    private static Condition condition = lock.newCondition();

    private static List<String> importedIds = new LinkedList<String>();

    public static boolean isImporting() {
        lock.lock();

        try {
            return importing;
        } finally {
            lock.unlock();
        }

    }

    public static void blockUntilFinish() throws InterruptedException {
        lock.lock();

        try {
            if (importing) {
                condition.await();
            }
        } finally {
            lock.unlock();
        }
    }

    public static void setImporting(boolean importing) {
        lock.lock();
        try {
            if (importing) {
                importedIds.clear();
            }
            ImportService.importing = importing;
            if (!importing) {
                condition.signal();
            }
        } finally {
            lock.unlock();
        }
    }

    public static void importedId(String id) {
        importedIds.add(id);
    }

    public static List<String> getImportedIds() {
        return importedIds;
    }

}