RuntimeContextKeeper.java

/**
 * Copyright 2011-2017 Asakusa Framework Team.
 *
 * 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.asakusafw.runtime.core.context;

import org.junit.rules.ExternalResource;

/**
 * Keeps global runtime context.
 */
public class RuntimeContextKeeper extends ExternalResource {

    private RuntimeContext context;

    @Override
    protected void before() throws Throwable {
        context = RuntimeContext.get();
    }

    @Override
    protected void after() {
        if (context != null) {
            RuntimeContext.set(context);
        }
    }
}