/*
 * 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.ignite.internal;

import java.io.File;
import org.apache.ignite.configuration.DataRegionConfiguration;
import org.apache.ignite.configuration.DataStorageConfiguration;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.apache.ignite.internal.util.GridDebug;
import org.apache.ignite.internal.util.typedef.internal.U;
import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.junit.Test;

/**
 * Tests leaks on node restart with enabled persistence.
 */
public class MemoryLeaksOnRestartNodeTest extends GridCommonAbstractTest {
    /** Heap dump file name. */
    private static final String HEAP_DUMP_FILE_NAME = "test.hprof";

    /** Restarts count. */
    private static final int RESTARTS = 10;

    /** Nodes count. */
    private static final int NODES = 3;

    /** Allow 5Mb leaks on node restart. */
    private static final int ALLOW_LEAK_ON_RESTART_IN_MB = 1;

    /** {@inheritDoc} */
    @Override protected IgniteConfiguration getConfiguration(String igniteInstanceName) throws Exception {
        IgniteConfiguration cfg = super.getConfiguration(igniteInstanceName);

        cfg.setDataStorageConfiguration(new DataStorageConfiguration()
            .setDefaultDataRegionConfiguration(
                new DataRegionConfiguration().setName("mem0").setPersistenceEnabled(false))
            .setDataRegionConfigurations(
                new DataRegionConfiguration().setName("disk").setPersistenceEnabled(true),
                new DataRegionConfiguration().setName("mem2").setPersistenceEnabled(false)));

        return cfg;
    }

    /** {@inheritDoc} */
    @Override protected void beforeTestsStarted() throws Exception {
        super.beforeTestsStarted();

        cleanPersistenceDir();
    }

    /** {@inheritDoc} */
    @Override protected void afterTestsStopped() throws Exception {
        cleanPersistenceDir();
    }

    /**
     * @throws Exception On failed.
     */
    @Test
    public void test() throws Exception {
        // Warmup
        for (int i = 0; i < RESTARTS / 2; ++i) {
            startGrids(NODES);

            U.sleep(500);

            stopAllGrids();
        }

        GridDebug.dumpHeap(HEAP_DUMP_FILE_NAME, true);

        File dumpFile = new File(HEAP_DUMP_FILE_NAME);

        final long size0 = dumpFile.length();

        // Restarts
        for (int i = 0; i < RESTARTS; ++i) {
            startGrids(NODES);

            U.sleep(500);

            stopAllGrids();

            GridDebug.dumpHeap(HEAP_DUMP_FILE_NAME, true);
        }

        GridDebug.dumpHeap(HEAP_DUMP_FILE_NAME, true);

        final float leakSize = (float)(dumpFile.length() - size0) / 1024 / 1024 / NODES / RESTARTS;

        assertTrue("Possible leaks detected. The " + leakSize + "M leaks per node restart after " + RESTARTS
                + " restarts. See the '" + dumpFile.getAbsolutePath() + "'",
            leakSize < ALLOW_LEAK_ON_RESTART_IN_MB);

        // Remove dump if successful.
        dumpFile.delete();
    }
}