content: /*
   * 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.camel.component.ignite.cache;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.InvalidPayloadException;
  import org.apache.camel.Message;
  import org.apache.camel.RuntimeCamelException;
  import org.apache.camel.component.ignite.IgniteConstants;
  import org.apache.camel.component.ignite.IgniteHelper;
  import org.apache.camel.spi.Synchronization;
  import org.apache.camel.support.DefaultAsyncProducer;
  import org.apache.camel.support.MessageHelper;
  import org.apache.ignite.IgniteCache;
  import org.apache.ignite.cache.CachePeekMode;
  import org.apache.ignite.cache.query.Query;
  import org.apache.ignite.cache.query.QueryCursor;
  
  /**
   * Ignite Cache producer.
   */
  public class IgniteCacheProducer extends DefaultAsyncProducer {
  
      private IgniteCache<Object, Object> cache;
      private IgniteCacheEndpoint endpoint;
  
      public IgniteCacheProducer(IgniteCacheEndpoint endpoint, IgniteCache<Object, Object> igniteCache) {
          super(endpoint);
          this.endpoint = endpoint;
          this.cache = igniteCache;
      }
  
      @Override
      public boolean process(Exchange exchange, AsyncCallback callback) {
          Message in = exchange.getIn();
          Message out = exchange.getOut();
          MessageHelper.copyHeaders(exchange.getIn(), out, true);
  
          switch (cacheOperationFor(exchange)) {
  
              case GET:
                  doGet(in, out);
                  break;
  
              case PUT:
                  doPut(in, out);
                  break;
  
              case QUERY:
                  doQuery(in, out, exchange);
                  break;
  
              case REMOVE:
                  doRemove(in, out);
                  break;
  
              case CLEAR:
                  doClear(in, out);
                  break;
  
              case SIZE:
                  doSize(in, out);
                  break;
  
              case REBALANCE:
                  doRebalance(in, out);
                  break;
  
              case REPLACE:
                  doReplace(in, out);
                  break;
  
              default:
                  break;
          }
  
          callback.done(false);
          return false;
      }
  
      @SuppressWarnings("unchecked")
      private void doGet(Message in, Message out) {
          Object cacheKey = cacheKey(in);
  
          if (cacheKey instanceof Set && !endpoint.isTreatCollectionsAsCacheObjects()) {
              out.setBody(cache.getAll((Set<Object>) cacheKey));
          } else {
              out.setBody(cache.get(cacheKey));
          }
      }
  
      @SuppressWarnings("unchecked")
      private void doPut(Message in, Message out) {
          Map<Object, Object> map = in.getBody(Map.class);
  
          if (map != null) {
              cache.putAll(map);
              return;
          }
  
          Object cacheKey = in.getHeader(IgniteConstants.IGNITE_CACHE_KEY);
  
          if (cacheKey == null) {
              throw new RuntimeCamelException(
                      "Cache PUT operation requires the cache key in the CamelIgniteCacheKey header, "
                                              + "or a payload of type Map.");
          }
  
          cache.put(cacheKey, in.getBody());
  
          IgniteHelper.maybePropagateIncomingBody(endpoint, in, out);
      }
  
      @SuppressWarnings("unchecked")
      private void doQuery(Message in, Message out, Exchange exchange) {
          Query<Object> query = in.getHeader(IgniteConstants.IGNITE_CACHE_QUERY, Query.class);
  
          if (query == null) {
              try {
                  query = in.getMandatoryBody(Query.class);
              } catch (InvalidPayloadException e) {
                  exchange.setException(e);
                  return;
              }
          }
  
          final QueryCursor<Object> cursor = cache.query(query);
  
          out.setBody(cursor.iterator());
  
          exchange.getExchangeExtension().addOnCompletion(new Synchronization() {
              @Override
              public void onFailure(Exchange exchange) {
                  cursor.close();
              }
  
              @Override
              public void onComplete(Exchange exchange) {
                  cursor.close();
              }
          });
  
      }
  
      @SuppressWarnings("unchecked")
      private void doRemove(Message in, Message out) {
          Object cacheKey = cacheKey(in);
  
          if (cacheKey instanceof Set && !endpoint.isTreatCollectionsAsCacheObjects()) {
              cache.removeAll((Set<Object>) cacheKey);
          } else {
              cache.remove(cacheKey);
          }
  
          IgniteHelper.maybePropagateIncomingBody(endpoint, in, out);
      }
  
      private void doClear(Message in, Message out) {
          cache.removeAll();
  
          IgniteHelper.maybePropagateIncomingBody(endpoint, in, out);
      }
  
      private void doRebalance(Message in, Message out) {
          cache.rebalance().get();
  
          IgniteHelper.maybePropagateIncomingBody(endpoint, in, out);
      }
  
      @SuppressWarnings("unchecked")
      private void doSize(Message in, Message out) {
          Object peekMode = in.getHeader(IgniteConstants.IGNITE_CACHE_PEEK_MODE, endpoint.getCachePeekMode());
  
          Integer result = null;
          if (peekMode instanceof Collection) {
              result = cache.size(((Collection<Object>) peekMode).toArray(new CachePeekMode[0]));
          } else if (peekMode instanceof CachePeekMode) {
              result = cache.size((CachePeekMode) peekMode);
          }
  
          out.setBody(result);
      }
  
      private void doReplace(Message in, Message out) {
          Object cacheKey = in.getHeader(IgniteConstants.IGNITE_CACHE_KEY);
  
          if (cacheKey == null) {
              throw new RuntimeCamelException(
                      "Cache REPLACE operation requires the cache key in the CamelIgniteCacheKey header");
          }
  
          Object oldValue = in.getHeader(IgniteConstants.IGNITE_CACHE_OLD_VALUE);
          if (oldValue == null) {
              cache.replace(cacheKey, in.getBody());
          } else {
              cache.replace(cacheKey, oldValue, in.getBody());
          }
  
          IgniteHelper.maybePropagateIncomingBody(endpoint, in, out);
      }
  
      private Object cacheKey(Message msg) {
          Object cacheKey = msg.getHeader(IgniteConstants.IGNITE_CACHE_KEY);
          if (cacheKey == null) {
              cacheKey = msg.getBody();
          }
          return cacheKey;
      }
  
      private IgniteCacheOperation cacheOperationFor(Exchange exchange) {
          return exchange.getIn().getHeader(IgniteConstants.IGNITE_CACHE_OPERATION, endpoint.getOperation(),
                  IgniteCacheOperation.class);
      }
  
  }
  