examples/utilities/ExampleMultiGetFunction.java

/*
 * 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 example;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.Properties;
import java.util.Vector;

import org.apache.geode.cache.Cache;
import org.apache.geode.cache.CacheClosedException;
import org.apache.geode.cache.CacheFactory;
import org.apache.geode.cache.Declarable;
import org.apache.geode.cache.execute.FunctionAdapter;
import org.apache.geode.cache.execute.FunctionContext;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.execute.ResultSender;

public class ExampleMultiGetFunction extends FunctionAdapter implements Declarable{

  public void execute(FunctionContext context) {
    ArrayList vals = new ArrayList();
    if(context.getArguments() instanceof Vector ) {
       Cache c = null;
       try {
         c = CacheFactory.getAnyInstance();
       }
       catch (CacheClosedException ex) {
         vals.add("NoCacheResult");
         context.getResultSender().lastResult(vals);
       }

       Region region = c.getRegion("partition_region");
       Vector keys = (Vector)context.getArguments();
       System.out.println("Context.getArguments " + keys);
       Iterator itr = keys.iterator();
       while (itr.hasNext()) {
         Object k = itr.next();
         vals.add(region.get(k));
         System.out.println("vals " + vals);
       }
    }
    context.getResultSender().lastResult(vals);
  }

  public String getId() {
    return "ExampleMultiGetFunction";
  }

  public void init(Properties arg0) {
  }

}