gemfire-core/src/main/java/com/gemstone/gemfire/internal/redis/executor/EchoExecutor.java

package com.gemstone.gemfire.internal.redis.executor;

import java.util.List;

import com.gemstone.gemfire.internal.redis.Command;
import com.gemstone.gemfire.internal.redis.Coder;
import com.gemstone.gemfire.internal.redis.ExecutionHandlerContext;
import com.gemstone.gemfire.internal.redis.RedisConstants.ArityDef;

public class EchoExecutor extends AbstractExecutor {
  
  @Override
  public void executeCommand(Command command, ExecutionHandlerContext context) {
    List<byte[]> commandElems = command.getProcessedCommand();
    if (commandElems.size() < 2) {
      command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.ECHO));
      return;
    }

    byte[] echoMessage = commandElems.get(1);
    command.setResponse(Coder.getBulkStringResponse(context.getByteBufAllocator(), echoMessage));
  }

}