/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.cloudstack.managed.context;

public class ManagedContextUtils {

    private static final ThreadLocal<Object> OWNER = new ThreadLocal<Object>();

    public static boolean setAndCheckOwner(Object owner) {
        if (OWNER.get() == null) {
            OWNER.set(owner);
            return true;
        }

        return false;
    }

    public static boolean clearOwner(Object owner) {
        if (OWNER.get() == owner) {
            OWNER.remove();
            return true;
        }

        return false;
    }

    public static boolean isInContext() {
        return OWNER.get() != null;
    }

    public static void rethrowException(Throwable t) {
        if (t instanceof RuntimeException) {
            throw (RuntimeException)t;
        } else if (t instanceof Error) {
            throw (Error)t;
        }
    }

}
