/*
 * 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.processors.cache;

import java.util.concurrent.Callable;
import org.apache.ignite.Ignite;
import org.apache.ignite.Ignition;
import org.apache.ignite.cache.CacheAtomicityMode;
import org.apache.ignite.cache.CacheMode;
import org.apache.ignite.cache.affinity.Affinity;
import org.apache.ignite.cache.affinity.rendezvous.RendezvousAffinityFunction;
import org.apache.ignite.configuration.CacheConfiguration;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.apache.ignite.internal.IgniteKernal;
import org.apache.ignite.internal.util.lang.GridAbsPredicate;
import org.apache.ignite.testframework.GridTestUtils;
import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.junit.Test;

/**
 * Tests affinity assignment for different affinity types.
 */
public class IgniteClientAffinityAssignmentSelfTest extends GridCommonAbstractTest {
    /** */
    public static final int PARTS = 256;

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

        if (!cfg.isClientMode()) {
            CacheConfiguration ccfg = new CacheConfiguration(DEFAULT_CACHE_NAME);

            ccfg.setCacheMode(CacheMode.PARTITIONED);
            ccfg.setBackups(1);
            ccfg.setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL);

            ccfg.setNearConfiguration(null);

            ccfg.setAffinity(new RendezvousAffinityFunction(false, PARTS));

            cfg.setCacheConfiguration(ccfg);
        }

        return cfg;
    }

    /**
     * @throws Exception If failed.
     */
    @Test
    public void testRendezvousAssignment() throws Exception {
        checkAffinityFunction();
    }

    /**
     * @throws Exception If failed.
     */
    private void checkAffinityFunction() throws Exception {
        startGridsMultiThreaded(3, true);

        long topVer = 3;

        try {
            checkAffinity(topVer++);

            final Ignite ignite3 = startClientGrid(3);

            GridTestUtils.assertThrows(log, new Callable<Object>() {
                @Override public Object call() throws Exception {
                    ((IgniteKernal)ignite3).getCache(DEFAULT_CACHE_NAME);

                    return null;
                }
            }, IllegalArgumentException.class, null);

            assertNotNull(ignite3.cache(DEFAULT_CACHE_NAME)); // Start client cache.

            ((IgniteKernal)ignite3).getCache(DEFAULT_CACHE_NAME);

            checkAffinity(topVer++);

            final Ignite ignite4 = startClientGrid(4);

            GridTestUtils.assertThrows(log, new Callable<Object>() {
                @Override public Object call() throws Exception {
                    ((IgniteKernal)ignite4).getCache(DEFAULT_CACHE_NAME);

                    return null;
                }
            }, IllegalArgumentException.class, null);

            assertNotNull(ignite4.cache(DEFAULT_CACHE_NAME)); // Start client cache.

            ((IgniteKernal)ignite4).getCache(DEFAULT_CACHE_NAME);

            checkAffinity(topVer++);

            final Ignite ignite5 = startClientGrid(5); // Node without cache.

            GridTestUtils.assertThrows(log, new Callable<Object>() {
                @Override public Object call() throws Exception {
                    ((IgniteKernal)ignite5).getCache(DEFAULT_CACHE_NAME);

                    return null;
                }
            }, IllegalArgumentException.class, null);

            checkAffinity(topVer++);

            stopGrid(5);

            checkAffinity(topVer++);

            stopGrid(4);

            checkAffinity(topVer++);

            stopGrid(3);

            checkAffinity(topVer);
        }
        finally {
            stopAllGrids();
        }
    }

    /**
     * @param topVer Topology version.
     * @throws Exception If failed.
     */
    private void checkAffinity(long topVer) throws Exception {
        awaitTopology(topVer);

        Affinity<Object> aff = grid(0).affinity(DEFAULT_CACHE_NAME);

        for (Ignite grid : Ignition.allGrids()) {
            try {
                if (grid.cluster().localNode().id().equals(grid(0).localNode().id()))
                    continue;

                Affinity<Object> checkAff = grid.affinity(DEFAULT_CACHE_NAME);

                for (int p = 0; p < PARTS; p++)
                    assertEquals(aff.mapPartitionToPrimaryAndBackups(p), checkAff.mapPartitionToPrimaryAndBackups(p));
            }
            catch (IllegalArgumentException ignored) {
                // Skip the node without cache.
            }
        }
    }

    /**
     * @param topVer Topology version.
     * @throws Exception If failed.
     */
    private void awaitTopology(final long topVer) throws Exception {
        for (Ignite grid : Ignition.allGrids()) {
            final GridCacheAdapter cache = ((IgniteKernal)grid).internalCache(DEFAULT_CACHE_NAME);

            if (cache == null)
                continue;

            GridTestUtils.waitForCondition(new GridAbsPredicate() {
                @Override public boolean apply() {
                    return cache.context().affinity().affinityTopologyVersion().topologyVersion() == topVer;
                }
            }, 5000);

            assertEquals(topVer, cache.context().affinity().affinityTopologyVersion().topologyVersion());
        }
    }
}