/**
 * 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.hadoop.yarn;

import org.junit.Assert;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import org.apache.hadoop.yarn.factories.RpcClientFactory;
import org.apache.hadoop.yarn.factories.RpcServerFactory;
import org.apache.hadoop.yarn.factories.impl.pb.RpcClientFactoryPBImpl;
import org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl;
import org.apache.hadoop.yarn.factory.providers.RpcFactoryProvider;
import org.junit.Test;

public class TestRpcFactoryProvider {

  @Test
  public void testFactoryProvider() {
    Configuration conf = new Configuration();
    RpcClientFactory clientFactory = null;
    RpcServerFactory serverFactory = null;
    
    
    clientFactory = RpcFactoryProvider.getClientFactory(conf);
    serverFactory = RpcFactoryProvider.getServerFactory(conf);
    Assert.assertEquals(RpcClientFactoryPBImpl.class, clientFactory.getClass());
    Assert.assertEquals(RpcServerFactoryPBImpl.class, serverFactory.getClass());

    conf.set(YarnConfiguration.IPC_CLIENT_FACTORY_CLASS, "unknown");
    conf.set(YarnConfiguration.IPC_SERVER_FACTORY_CLASS, "unknown");
    conf.set(YarnConfiguration.IPC_RECORD_FACTORY_CLASS, "unknown");

    try {
      clientFactory = RpcFactoryProvider.getClientFactory(conf);
      Assert.fail("Expected an exception - unknown serializer");
    } catch (YarnRuntimeException e) {
    }
    try {
      serverFactory = RpcFactoryProvider.getServerFactory(conf);
      Assert.fail("Expected an exception - unknown serializer");
    } catch (YarnRuntimeException e) {
    }
    
    conf = new Configuration();
    conf.set(YarnConfiguration.IPC_CLIENT_FACTORY_CLASS, "NonExistantClass");
    conf.set(YarnConfiguration.IPC_SERVER_FACTORY_CLASS, RpcServerFactoryPBImpl.class.getName());
    
    try {
      clientFactory = RpcFactoryProvider.getClientFactory(conf);
      Assert.fail("Expected an exception - unknown class");
    } catch (YarnRuntimeException e) {
    }
    try {
      serverFactory = RpcFactoryProvider.getServerFactory(conf);
    } catch (YarnRuntimeException e) {
      Assert.fail("Error while loading factory using reflection: [" + RpcServerFactoryPBImpl.class.getName() + "]");
    }
  }
}