/*
 * 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.geode.internal.cache.partitioned;

import org.junit.experimental.categories.Category;
import org.junit.Test;

import static org.junit.Assert.*;

import org.apache.geode.test.dunit.cache.internal.JUnit4CacheTestCase;
import org.apache.geode.test.dunit.internal.JUnit4DistributedTestCase;
import org.apache.geode.test.junit.categories.DistributedTest;

import org.apache.geode.cache.ExpirationAttributes;
import org.apache.geode.cache.RegionFactory;
import org.apache.geode.cache.RegionShortcut;
import org.apache.geode.cache30.CacheTestCase;
import org.apache.geode.distributed.internal.InternalDistributedSystem;
import org.apache.geode.test.dunit.Assert;
import org.apache.geode.test.dunit.IgnoredException;
import org.apache.geode.test.dunit.Host;
import org.apache.geode.test.dunit.RMIException;
import org.apache.geode.test.dunit.SerializableRunnable;
import org.apache.geode.test.dunit.VM;
import org.apache.geode.test.dunit.Wait;

/**
 *
 */
@Category(DistributedTest.class)
public class PartitionedRegionMetaDataCleanupDUnitTest extends JUnit4CacheTestCase {

  public PartitionedRegionMetaDataCleanupDUnitTest() {
    super();
  }

  @Test
  public void testCleanupOnCloseCache() {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    createPR(vm0, "region1", 5);
    createPR(vm1, "region2", 10);
    // This should fail
    IgnoredException ex = IgnoredException.addIgnoredException("IllegalStateException", vm1);
    try {
      createPR(vm1, "region1", 10);
      fail("Should have received an exception");
    } catch (RMIException e) {
      // ok
    } finally {
      ex.remove();
    }
    closeCache(vm0);
    waitForCreate(vm0, "region1", 15);
  }

  @Test
  public void testCleanupOnCloseRegion() {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    createPR(vm0, "region1", 5);
    createPR(vm1, "region2", 10);
    // This should fail
    IgnoredException ex = IgnoredException.addIgnoredException("IllegalStateException", vm1);
    try {
      createPR(vm1, "region1", 10);
      fail("Should have received an exception");
    } catch (RMIException e) {
      // ok
    } finally {
      ex.remove();
    }
    closePr(vm0, "region1");
    waitForCreate(vm0, "region1", 15);
  }

  @Test
  public void testCrash() throws InterruptedException {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    createPR(vm0, "region1", 5);
    createPR(vm1, "region2", 10);
    // This should fail
    IgnoredException ex = IgnoredException.addIgnoredException("IllegalStateException", vm1);
    try {
      createPR(vm1, "region1", 10);
      fail("Should have received an exception");
    } catch (RMIException e) {
      // ok
    } finally {
      ex.remove();
    }

    ex = IgnoredException.addIgnoredException("DistributedSystemDisconnectedException", vm0);
    try {
      fakeCrash(vm0);
    } finally {
      ex.remove();
    }

    waitForCreate(vm0, "region1", 15);
  }

  private void closeCache(VM vm0) {
    vm0.invoke(new SerializableRunnable() {
      public void run() {
        closeCache();

      }
    });
  }

  private void fakeCrash(VM vm0) {
    vm0.invoke(new SerializableRunnable() {
      public void run() {
        InternalDistributedSystem ds =
            (InternalDistributedSystem) getCache().getDistributedSystem();
        // Shutdown without closing the cache.
        ds.getDistributionManager().close();

        // now cleanup the cache and ds.
        disconnectFromDS();

      }
    });
  }

  private void closePr(VM vm0, final String regionName) {
    vm0.invoke(new SerializableRunnable() {
      public void run() {
        getCache().getRegion(regionName).close();
      }
    });
  }

  private void createPR(VM vm0, final String regionName, final int expirationTime) {
    vm0.invoke(new SerializableRunnable() {
      public void run() {
        getCache().createRegionFactory(RegionShortcut.PARTITION)
            // .setEvictionAttributes(EvictionAttributes.createLIFOEntryAttributes(evictionEntries,
            // EvictionAction.LOCAL_DESTROY))
            .setEntryTimeToLive(new ExpirationAttributes(expirationTime)).create(regionName);
      }
    });
  }

  /**
   * Try to create the region with the given attributes. This will try 20 times to create the region
   * until the region can be successfully created without an illegal state exception.
   * 
   * This is a workaround for bug 47125, because the metadata cleanup happens asynchronously.
   */
  private void waitForCreate(VM vm0, final String regionName, final int expirationTime) {
    vm0.invoke(new SerializableRunnable() {
      public void run() {
        RegionFactory<Object, Object> rf = getCache().createRegionFactory(RegionShortcut.PARTITION)
            // .setEvictionAttributes(EvictionAttributes.createLIFOEntryAttributes(evictionEntries,
            // EvictionAction.LOCAL_DESTROY))
            .setEntryTimeToLive(new ExpirationAttributes(expirationTime));

        // We may log an exception if the create fails. Ignore thse.
        IgnoredException ex = IgnoredException.addIgnoredException("IllegalStateException");
        try {
          int i = 0;
          // Loop until a successful create
          while (true) {
            try {
              i++;
              rf.create(regionName);
              // if the create was succesfull, we're done
              return;
            } catch (IllegalStateException expected) {
              // give up if we can't create the region in 20 tries
              if (i == 20) {
                Assert.fail("Metadata was never cleaned up in 20 tries", expected);
              }

              // wait a bit before the next attempt.
              Wait.pause(500);
            }
          }
        } finally {
          ex.remove();
        }
      }
    });
  }
}