package org.apache.commons.jcs.engine;
   
   /*
    * 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.
   */
  
  import junit.framework.TestCase;
  
  import org.apache.commons.jcs.JCS;
  import org.apache.commons.jcs.access.CacheAccess;
  import org.apache.commons.jcs.engine.control.CompositeCacheManager;
  import org.apache.commons.jcs.utils.props.PropertyLoader;
  
  import java.util.Properties;
  
  /**
   * Verify that system properties can override.
   */
  public class SystemPropertyUsageUnitTest
      extends TestCase
  {
      private static final String JCS_DEFAULT_CACHEATTRIBUTES_MAX_OBJECTS = "jcs.default.cacheattributes.MaxObjects";
      private static final int testValue = 6789;
  
      private CompositeCacheManager manager = null;
      
      @Override
      protected void setUp() throws Exception
      {
         super.setUp();
         //First shut down any previously running manager.
         manager = CompositeCacheManager.getInstance();
         manager.shutDown();
      }
  
  	/**
  	 * @see junit.framework.TestCase#tearDown()
  	 */
  	@Override
  	protected void tearDown() throws Exception
  	{
  		if (manager != null)
  		{
  			manager.shutDown();
  		}
  
          System.clearProperty(JCS_DEFAULT_CACHEATTRIBUTES_MAX_OBJECTS);
  		super.tearDown();
  	}
  
  	/**
       * Verify that the system properties are used.
       * @throws Exception
       *
       */
      public void testSystemPropertyUsage()
          throws Exception
      {
          System.setProperty( JCS_DEFAULT_CACHEATTRIBUTES_MAX_OBJECTS, String.valueOf(testValue) );
          
          JCS.setConfigFilename( "/TestSystemPropertyUsage.ccf" );
          
          CacheAccess<String, String> jcs = JCS.getInstance( "someCacheNotInFile" );
  
          manager = CompositeCacheManager.getInstance();
  
          assertEquals( "System property value is not reflected.", testValue, jcs.getCacheAttributes().getMaxObjects());
      }
  
      /**
       * Verify that the system properties are not used is specified.
       *
       * @throws Exception
       *
       */
      public void testSystemPropertyUsage_inactive()
          throws Exception
      {
          System.setProperty( JCS_DEFAULT_CACHEATTRIBUTES_MAX_OBJECTS, String.valueOf(testValue) );
  
          manager = CompositeCacheManager.getUnconfiguredInstance();
  
          Properties props = PropertyLoader.loadProperties( "TestSystemPropertyUsage.ccf" );
  
         manager.configure( props, false );
 
         CacheAccess<String, String> jcs = JCS.getInstance( "someCacheNotInFile" );
 
         assertEquals( "System property value should not be reflected",
                       Integer.parseInt( props.getProperty( JCS_DEFAULT_CACHEATTRIBUTES_MAX_OBJECTS ) ),
                       jcs.getCacheAttributes().getMaxObjects());
     }
 }