package org.apache.blur.command.commandtype;

import java.io.IOException;
import java.lang.reflect.Method;

import org.apache.blur.command.ClusterContext;
import org.apache.blur.command.Command;
import org.apache.blur.command.CommandRunner;
import org.apache.blur.thirdparty.thrift_0_9_0.TException;
import org.apache.blur.thrift.generated.Blur.Iface;
import org.apache.blur.thrift.generated.BlurException;

/**
 * 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.
 */

public abstract class ClusterExecuteCommand<T> extends Command<T> {

  public abstract T clusterExecute(ClusterContext context) throws IOException, InterruptedException;

  @Override
  public T run() throws IOException {
    try {
      return CommandRunner.run(this);
    } catch (BlurException e) {
      throw new IOException(e);
    } catch (TException e) {
      throw new IOException(e);
    }
  }

  @Override
  public T run(String connectionStr) throws IOException {
    try {
      return CommandRunner.run(this, connectionStr);
    } catch (BlurException e) {
      throw new IOException(e);
    } catch (TException e) {
      throw new IOException(e);
    }
  }

  @Override
  public T run(Iface client) throws IOException {
    try {
      return CommandRunner.run(this, client);
    } catch (BlurException e) {
      throw new IOException(e);
    } catch (TException e) {
      throw new IOException(e);
    }
  }

  @Override
  public String getReturnType() {
    try {
      Method method = getClass().getMethod("clusterExecute", new Class[] { ClusterContext.class });
      Class<?> returnType = method.getReturnType();
      return returnType.getSimpleName();
    } catch (Exception e) {
      throw new RuntimeException("Unknown error while trying to get return type.", e);
    }
  }

}