package net.hasor.rsf.protocol.codec;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import java.io.IOException;
import net.hasor.rsf.protocol.block.RequestSocketBlock;
/**
* Protocol Interface,for custom network protocol
* @version : 2014年10月25日
* @author 赵永春(zyc@hasor.net)
*/
public class RpcRequestProtocol implements Protocol<RequestSocketBlock> {
/**encode Message to byte & write to network framework*/
public void encode(RequestSocketBlock reqMsg, ByteBuf buf) throws IOException {
//* --------------------------------------------------------bytes =13
//* byte[1] version RSF版本(0xC1)
buf.writeByte(reqMsg.getVersion());
//* byte[8] requestID 请求ID
buf.writeLong(reqMsg.getRequestID());
//* byte[1] keepData 保留区
buf.writeByte(0);
//* byte[3] contentLength 内容大小(max = 16MB)
ByteBuf requestBody = this.encodeRequest(reqMsg);
int bodyLength = requestBody.readableBytes();
bodyLength = (bodyLength << 8) >>> 8;//左移8未，在无符号右移8位。形成最大16777215字节的限制。
buf.writeMedium(bodyLength);
//
buf.writeBytes(requestBody);
}
//
private ByteBuf encodeRequest(RequestSocketBlock reqMsg) {
ByteBuf bodyBuf = ByteBufAllocator.DEFAULT.heapBuffer();
//* --------------------------------------------------------bytes =14
//* byte[2] servicesName-(attr-index) 远程服务名
bodyBuf.writeShort(reqMsg.getServiceName());
//* byte[2] servicesGroup-(attr-index) 远程服务分组
bodyBuf.writeShort(reqMsg.getServiceGroup());
//* byte[2] servicesVersion-(attr-index) 远程服务版本
bodyBuf.writeShort(reqMsg.getServiceVersion());
//* byte[2] servicesMethod-(attr-index) 远程服务方法名
bodyBuf.writeShort(reqMsg.getTargetMethod());
//* byte[2] serializeType-(attr-index) 序列化策略
bodyBuf.writeShort(reqMsg.getSerializeType());
//* byte[4] clientTimeout 远程客户端超时时间
bodyBuf.writeInt(reqMsg.getClientTimeout());
//* --------------------------------------------------------bytes =1 ~ 1021
//* byte[1] paramCount 参数总数
int[] paramMapping = reqMsg.getParameters();
bodyBuf.writeByte(paramMapping.length);
for (int i = 0; i < paramMapping.length; i++) {
//* byte[4] ptype-0-(attr-index,attr-index) 参数类型1
//* byte[4] ptype-1-(attr-index,attr-index) 参数类型2
bodyBuf.writeInt(paramMapping[i]);
}
//* --------------------------------------------------------bytes =1 ~ 1021
//* byte[1] optionCount 选项参数总数
int[] optionMapping = reqMsg.getOptions();
bodyBuf.writeByte(optionMapping.length);
for (int i = 0; i < optionMapping.length; i++) {
//* byte[4] ptype-0-(attr-index,attr-index) 选项参数1
//* byte[4] ptype-1-(attr-index,attr-index) 选项参数2
bodyBuf.writeInt(optionMapping[i]);
}
//* --------------------------------------------------------bytes =6 ~ 8192
//* byte[2] attrPool-size (Max = 2047) 池大小 0x07FF
int[] poolData = reqMsg.getPoolData();
bodyBuf.writeShort(poolData.length);
for (int i = 0; i < poolData.length; i++) {
//* byte[4] ptype-0-(attr-index,attr-index) 属性1大小
//* byte[4] ptype-1-(attr-index,attr-index) 属性1大小
bodyBuf.writeInt(poolData[i]);
}
//* --------------------------------------------------------bytes =n
//* dataBody 数据内容
reqMsg.fillTo(bodyBuf);
return bodyBuf;
}
//
//
//
/**decode stream to object*/
public RequestSocketBlock decode(ByteBuf buf) throws IOException {
//* --------------------------------------------------------bytes =13
//* byte[1] version RSF版本(0xC1)
byte version = buf.readByte();
//* byte[8] requestID 包含的请求ID
long requestID = buf.readLong();
//* byte[1] keepData 保留区
buf.skipBytes(1);
//* byte[3] contentLength 内容大小
buf.skipBytes(3);//.readUnsignedMedium()
//
RequestSocketBlock req = new RequestSocketBlock();
req.setVersion(version);
req.setRequestID(requestID);
//* --------------------------------------------------------bytes =14
//* byte[2] servicesName-(attr-index) 远程服务名
req.setServiceName(buf.readShort());
//* byte[2] servicesGroup-(attr-index) 远程服务分组
req.setServiceGroup(buf.readShort());
//* byte[2] servicesVersion-(attr-index) 远程服务版本
req.setServiceVersion(buf.readShort());
//* byte[2] servicesMethod-(attr-index) 远程服务方法名
req.setTargetMethod(buf.readShort());
//* byte[2] serializeType-(attr-index) 序列化策略
req.setSerializeType(buf.readShort());
//* byte[4] clientTimeout 远程客户端超时时间
req.setClientTimeout(buf.readInt());
//* --------------------------------------------------------bytes =1 ~ 1021
//* byte[1] paramCount 参数总数
byte paramCount = buf.readByte();
for (int i = 0; i < paramCount; i++) {
//* byte[4] ptype-0-(attr-index,attr-index) 参数类型
int mergeData = buf.readInt();
req.addParameter(mergeData);
}
//* --------------------------------------------------------bytes =1 ~ 1021
//* byte[1] optionCount 选项参数总数
byte optionCount = buf.readByte();
for (int i = 0; i < optionCount; i++) {
//* byte[4] attr-0-(attr-index,attr-index) 选项参数
int mergeData = buf.readInt();
req.addOption(mergeData);
}
//* --------------------------------------------------------bytes =6 ~ 8192
//* byte[2] attrPool-size (Max = 2047) 池大小
short attrPoolSize = buf.readShort();
for (int i = 0; i < attrPoolSize; i++) {
//* byte[4] att-length 属性1大小
int length = buf.readInt();
req.addPoolData(length);
}
//* --------------------------------------------------------bytes =n
//* dataBody 数据内容
req.fillFrom(buf.readBytes(req.getPoolSize()));
return req;
}
}