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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.cache.client.internal;

import java.util.Map;

import com.gemstone.gemfire.InternalGemFireError;
import com.gemstone.gemfire.cache.client.ServerOperationException;
import com.gemstone.gemfire.i18n.LogWriterI18n;
import com.gemstone.gemfire.internal.cache.tier.MessageType;
import com.gemstone.gemfire.internal.cache.tier.sockets.Message;
import com.gemstone.gemfire.internal.cache.tier.sockets.Part;
import com.gemstone.gemfire.pdx.internal.PdxType;

/**
 * Retrieve all known PDX types.
 * 
 * @author bakera
 * @since 7.0
 */
public class GetPDXTypesOp {

  public static Map execute(ExecutablePool pool) {
    AbstractOp op = new GetPDXTypesOpImpl(pool.getLoggerI18n());
    return (Map) pool.execute(op);
  }
                                                               
  private GetPDXTypesOp() {
    // no instances allowed
  }
  
  private static class GetPDXTypesOpImpl extends AbstractOp {
    public GetPDXTypesOpImpl(LogWriterI18n lw) {
      super(lw, MessageType.GET_PDX_TYPES, 1);
      getMessage().addIntPart(0); // must have at least one part
    }

    @Override
    protected Object processResponse(Message msg) throws Exception {
      Part part = msg.getPart(0);
      int msgType = msg.getMessageType();
      if (msgType == MessageType.RESPONSE) {
        return (Map) part.getObject();

      } else {
        if (msgType == MessageType.EXCEPTION) {
          String s = "While performing a remote " + "getPdxTypes";
          throw new ServerOperationException(s, (Throwable) part.getObject());

        } else if (isErrorResponse(msgType)) {
          throw new ServerOperationException(part.getString());

        } else {
          throw new InternalGemFireError("Unexpected message type "
              + MessageType.getString(msgType));
        }
      }
    }

    @Override
    protected boolean isErrorResponse(int msgType) {
      return false;
    }

    @Override
    protected long startAttempt(ConnectionStats stats) {
      return 0;
    }

    @Override
    protected void endSendAttempt(ConnectionStats stats, long start) {
    }

    @Override
    protected void endAttempt(ConnectionStats stats, long start) {
    }
    
    @Override
    protected void processSecureBytes(Connection cnx, Message message)
        throws Exception {
    }

    @Override
    protected boolean needsUserId() {
      return false;
    }

    @Override
    protected boolean participateInTransaction() {
      return false;
    }

    @Override
    protected void sendMessage(Connection cnx) throws Exception {
      getMessage().setEarlyAck((byte)(getMessage().getEarlyAckByte() & Message.MESSAGE_HAS_SECURE_PART));
      getMessage().send(false);
    }
  }
}