/*
    * 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.chemistry.opencmis.client.runtime;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.util.HashMap;
  import java.util.Map;
  
  
  import org.apache.chemistry.opencmis.client.api.CmisObject;
  import org.apache.chemistry.opencmis.client.runtime.cache.Cache;
  import org.apache.chemistry.opencmis.client.runtime.cache.CacheImpl;
  import org.apache.chemistry.opencmis.commons.SessionParameter;
  import org.junit.Before;
  import org.junit.Test;
  
  import static junit.framework.Assert.*;
  
  public class CacheTest {
  
      @Before
      public void setup() {
      }
  
      @Test
      public void cacheSingleObjectTest() {
          Cache cache = createCache(100, 3600 * 1000);
  
          String id = "1";
          // String path = "/1";
          String cacheKey = "key";
  
          // add object
          CmisObject obj1 = createCmisObject(id);
          cache.put(obj1, cacheKey);
  
          // access object
          assertTrue(cache.containsId(id, cacheKey));
  
          // access object
          CmisObject obj2 = cache.getById(id, cacheKey);
          assertEquals(obj1, obj2);
  
          // clear cache
          cache.clear();
  
          // access object (not found)
          assertFalse(cache.containsId(id, cacheKey));
  
          // access object (not found)
          CmisObject obj4 = cache.getById(id, cacheKey);
          assertNull(obj4);
      }
  
      @Test
      public void cacheSizeTest() {
          int cacheSize = 50000;
          Cache cache = createCache(cacheSize, 3600 * 1000);
          assertEquals(cacheSize, cache.getCacheSize());
      }
  
      @Test
      public void lruTest() {
          int cacheSize = 3;
          Cache cache = createCache(cacheSize, 3600 * 1000);
  
          String cacheKey = "key";
  
          for (int i = 0; i < cacheSize + 1; i++) {
              CmisObject obj = createCmisObject("id" + i);
              cache.put(obj, cacheKey);
          }
  
          assertNull(cache.getById("id0", cacheKey)); // thrown out
          assertNotNull(cache.getById("id1", cacheKey));
          assertNotNull(cache.getById("id2", cacheKey));
          assertNotNull(cache.getById("id3", cacheKey));
      }
  
      @SuppressWarnings("static-access")
     @Test
     public void ttlTest() throws InterruptedException {
         Cache cache = createCache(10, 500);
 
         String cacheKey = "key";
         String id = "id";
 
         CmisObject obj = this.createCmisObject(id);
         cache.put(obj, cacheKey);
 
         assertNotNull(cache.getById(id, cacheKey));
 
         Thread.currentThread().sleep(750);
 
         assertNull(cache.getById(id, cacheKey));
     }
 
     @Test
     public void serializationTest() throws Exception {
         int cacheSize = 10;
         Cache cache = createCache(cacheSize, 3600 * 1000);
 
         String cacheKey = "key";
 
         for (int i = 0; i < cacheSize; i++) {
             CmisObject obj = createCmisObject("id" + i);
             cache.put(obj, cacheKey);
         }
 
         ByteArrayOutputStream buffer = new ByteArrayOutputStream();
         ObjectOutputStream out = new ObjectOutputStream(buffer);
         out.writeObject(cache);
         out.close();
 
         ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray()));
         Cache cache2 = (Cache) in.readObject();
         in.close();
 
         for (int k = 0; k < cacheSize; k++) {
             CmisObject o1 = cache.getById("id" + k, cacheKey);
             CmisObject o2 = cache2.getById("id" + k, cacheKey);
             assertEquals(o1.getId(), o2.getId());
         }
     }
 
     /**
      * Create a Mock for testing Cache is sufficient.
      *
      * @param id
      * @return a mocked object
      */
     private static CmisObject createCmisObject(final String id) {
         return new CmisObjectMock(id);
     }
 
     private static Cache createCache(int cacheSize, int ttl) {
         Cache cache = new CacheImpl();
 
         Map<String, String> parameters = new HashMap<String, String>();
         parameters.put(SessionParameter.CACHE_SIZE_OBJECTS, "" + cacheSize);
         parameters.put(SessionParameter.CACHE_TTL_OBJECTS, "" + ttl);
 
         cache.initialize(null, parameters);
 
         return cache;
     }
 }