/*
 * Copyright 2017 ThoughtWorks, Inc.
 *
 * 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.thoughtworks.go.server.transaction;

import com.thoughtworks.go.server.cache.GoCache;
import org.springframework.transaction.TransactionStatus;

import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

class TransactionCacheAssertionUtil {
    private GoCache goCache;
    private TransactionTemplate transactionTemplate;

    public TransactionCacheAssertionUtil(GoCache goCache, TransactionTemplate transactionTemplate) {
        this.goCache = goCache;
        this.transactionTemplate = transactionTemplate;
    }

    public String doInTxnWithCachePut(final DoInTxn inTxn) {
        goCache.put("loser", "boozer");

        final String[] cachedValueBeforeAndAfter = new String[2];
        transactionTemplate.execute(new org.springframework.transaction.support.TransactionCallbackWithoutResult() {
            @Override protected void doInTransactionWithoutResult(TransactionStatus status) {
                cachedValueBeforeAndAfter[0] = (String) goCache.get("loser");
                inTxn.invoke();
                cachedValueBeforeAndAfter[1] = (String) goCache.get("loser");
            }
        });

        assertThat(goCache.get("loser"), is("boozer"));
        assertThat(cachedValueBeforeAndAfter[0], is("boozer"));
        return cachedValueBeforeAndAfter[1];
    }

    public void assertCacheBehaviourInTxn(final DoInTxn inTxn) {
        assertThat(doInTxnWithCachePut(inTxn), is(nullValue()));
    }

    public static interface DoInTxn {
        public void invoke();
    }
}