/*
    * 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.commons.jcs3.jcache.extras.writer;
  
  import javax.cache.Cache;
  import javax.cache.configuration.Factory;
  import javax.cache.integration.CacheWriter;
  import javax.cache.integration.CacheWriterException;
  
  import org.apache.commons.jcs3.jcache.extras.closeable.Closeables;
  
  import java.io.Closeable;
  import java.io.IOException;
  import java.util.Collection;
  
  public class CompositeCacheWriter<K, V> implements CacheWriter<K, V>, Closeable, Factory<CacheWriter<K, V>>
  {
      private final CacheWriter<K, V>[] writers;
  
      public CompositeCacheWriter(final CacheWriter<K, V>... writers)
      {
          this.writers = writers;
      }
  
      @Override
      public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException
      {
          CacheWriterException e = null;
          for (final CacheWriter<K, V> writer : writers)
          {
              try
              {
                  writer.write(entry);
              }
              catch (final CacheWriterException ex)
              {
                  if (e == null)
                  {
                      e = ex;
                  }
              }
          }
          if (e != null)
          {
              throw e;
          }
      }
  
      @Override
      public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException
      {
          CacheWriterException e = null;
          for (final CacheWriter<K, V> writer : writers)
          {
              try
              {
                  writer.writeAll(entries);
              }
              catch (final CacheWriterException ex)
              {
                  if (e == null)
                  {
                      e = ex;
                  }
              }
          }
          if (e != null)
          {
              throw e;
          }
      }
  
      @Override
      public void delete(final Object key) throws CacheWriterException
      {
          CacheWriterException e = null;
          for (final CacheWriter<K, V> writer : writers)
          {
              try
              {
                  writer.delete(key);
              }
              catch (final CacheWriterException ex)
             {
                 if (e == null)
                 {
                     e = ex;
                 }
             }
         }
         if (e != null)
         {
             throw e;
         }
     }
 
     @Override
     public void deleteAll(final Collection<?> keys) throws CacheWriterException
     {
         CacheWriterException e = null;
         for (final CacheWriter<K, V> writer : writers)
         {
             try
             {
                 writer.deleteAll(keys);
             }
             catch (final CacheWriterException ex)
             {
                 if (e == null)
                 {
                     e = ex;
                 }
             }
         }
         if (e != null)
         {
             throw e;
         }
     }
 
     @Override
     public CacheWriter<K, V> create()
     {
         return this;
     }
 
     @Override
     public void close() throws IOException
     {
         Closeables.close(writers);
     }
 }