package protobuf;
option java_package = "com.topsec.trd";
option java_outer_classname = "StudentProto";
message Student {
required string name = 1;
required int32 age = 2;
required int32 sex = 3;
optional string alias = 4;
repeated string interest=5;
}
namespace java com.topsec.trd
struct StudentThrift {
1: string name,
2: i32 age,
3: i32 sex,
4: optional string aliass,
5: list interest
}
{"namespace": "com.topsec.trd",
"type": "record",
"name": "StudentAvro",
"fields": [
{"name": "name", "type": "string"},
{"name": "alias", "type": ["string", "null"]},
{"name": "age", "type": ["int", "null"]},
{"name": "sex", "type": ["string", "null"]},
{"name": "interet", "type": {"type": "array", "items": "string"}}
]
}
生成protobuf bean
protoc --java_out=. student.proto
生成thrift bean
thrift-0.10.0.exe -gen java student.thrift
生成avro bean
java -jar lib/avro-tools-1.7.7.jar compile schema src/main/resource/student.avsc src/main/java
public class ProtoBuf {
private final static int TIMES = 10000000;
public static void main(String[] args) throws IOException {
long start = System.currentTimeMillis();
for(int i = 0; i < TIMES; i++) {
deserialize();
}
long end = System.currentTimeMillis();
System.out.println("ProtoBuf total time \t" + (end -start));
}
public static byte [] serializeAsBytes() {
return makeStudent().build().toByteArray();
}
public static InputStream serializeAsStream() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
makeStudent().build().writeDelimitedTo(baos);
return new ByteArrayInputStream(baos.toByteArray());
}
private static Builder makeStudent() {
StudentProto.Student.Builder student = StudentProto.Student.newBuilder();
student.setName("小明");
student.setSex(0);
student.setAge(18);
List interests = new ArrayList();
interests.add("吃饭");
interests.add("睡觉");
interests.add("打豆豆");
student.addAllInterest(interests);
return student;
}
public static void deserialize() throws IOException {
byte [] bytes = serializeAsBytes();
StudentProto.Student student = StudentProto.Student.parseFrom(bytes);
System.out.println(student.getName());
}
}
public class Thrift {
private final static int TIMES = 10000000;
private final static TSerializer SERIALIZER = new TSerializer(new TBinaryProtocol.Factory());
private final static TDeserializer DESERIALIZER = new TDeserializer(new TBinaryProtocol.Factory());
public static void main(String[] args) throws TException {
long start = System.currentTimeMillis();
for(int i = 0; i < TIMES; i++) {
deserialize();
}
long end = System.currentTimeMillis();
System.out.println("Thrift total time \t" + (end -start));
}
public static byte [] serialize() throws TException {
StudentThrift stu = new StudentThrift();
stu.setName("小明");
stu.setSex(0);
stu.setAge(18);
List interests = new ArrayList();
interests.add("吃饭");
interests.add("睡觉");
interests.add("打豆豆");
stu.setInterest(interests);
return SERIALIZER.serialize(stu);
}
public static void deserialize() throws TException {
byte [] bytes = serialize();
StudentThrift stu = new StudentThrift();
DESERIALIZER.deserialize(stu, bytes);
// System.out.println(stu);
}
}
public class AVRO {
private final static int TIMES = 10000000;
public static void main(String[] args) throws IOException {
long start = System.currentTimeMillis();
deserializeAsBytes();
long end = System.currentTimeMillis();
System.out.println("Avro total time \t" + (end -start));
}
public static byte [] serializeAsBytes() throws IOException {
StudentAvro student = new StudentAvro();
student.setName("小明");
student.setSex("女");
student.setAge(18);
List interests = new ArrayList();
interests.add("吃饭");
interests.add("睡觉");
interests.add("打豆豆");
student.setInteret(interests);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DatumWriter userDatumWriter = new SpecificDatumWriter(StudentAvro.class);
DataFileWriter dataFileWriter = new DataFileWriter(userDatumWriter);
dataFileWriter.create(student.getSchema(), baos);
dataFileWriter.append(student);
dataFileWriter.close();
return baos.toByteArray();
}
public static byte [] serializeAsBytes(int times) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DatumWriter userDatumWriter = new SpecificDatumWriter(StudentAvro.class);
DataFileWriter dataFileWriter = new DataFileWriter(userDatumWriter);
dataFileWriter.create(new StudentAvro().getSchema(), baos);
for(int i = 0; i < times; i++) {
StudentAvro student = new StudentAvro();
student.setName("小明");
student.setSex("女");
student.setAge(18);
List interests = new ArrayList();
interests.add("吃饭");
interests.add("睡觉");
interests.add("打豆豆");
student.setInteret(interests);
dataFileWriter.append(student);
}
dataFileWriter.close();
return baos.toByteArray();
}
public static void deserializeAsBytes() throws IOException {
SeekableByteArrayInput sbai = new SeekableByteArrayInput(serializeAsBytes(TIMES));
DatumReader datumReader = new SpecificDatumReader(StudentAvro.class);
DataFileReader dataFileReader = new DataFileReader(sbai, datumReader);
StudentAvro user = null;
while (dataFileReader.hasNext()) {
user = dataFileReader.next(user);
System.out.println(user.getName());
}
dataFileReader.close();
}
}
private final static int TIMES = 100000;
ProtoBuf total time 282
Thrift total time 229
Avro total time 694
private final static int TIMES = 1000000;
ProtoBuf total time 988
Thrift total time 1248
Avro total time 2079
private final static int TIMES = 10000000;
ProtoBuf total time 7368
Thrift total time 10675
Avro total time 15025
项/技术 | avro | thrift | protobuf |
速度 | 慢 | 中等 | 快 |
序列化到1个stream | 是 | 否 | 否 |
(包含测试代码及三种schema和生成bean的工具等)
源代码下载地址-点击下载
(a)占用空间小
一条消息数据,用protobuf序列化后的大小是json的10分之一,xml格式的20分之一,是二进制序列化的10分之一(极端情况下,会大于等于直接序列化),总体看来ProtoBuf的优势还是很明显的。
(b)解析速度快
解析速度快,主要归功于protobuf对message 没有动态解析,没有了动态解析的处理序列化速度自然快了。就比如xml ,获取文件之后,还需要解析标签、节点、字段,每一个都需要遍历,而protobuf不需要,直接将field装入流。
(c)兼容性好
fieldNumber 为每个field定义一个编号,其一保证不重复,其二保证其在流中的位置。如若当前数据流中有某个字段,而解析方没有相关的解析代码,解析放会直接skip 吊这个field,而且读数据的position也会后移,保证后续读取不出问题。
参考文章:
http://www.jianshu.com/p/ec39f79c0412
https://www.ibm.com/developerworks/cn/linux/l-cn-gpb
对象序列化
private StudentProto.Student request(int age) {
StudentProto.Student.Builder builder = StudentProto.Student.newBuilder();
builder.setName("小明");
builder.setSex(0);
builder.setAge(age);
return builder.build();
}
protobuf计算tag源码
static final int TAG_TYPE_BITS = 3;
/** Makes a tag value given a field number and wire type. */
static int makeTag(final int fieldNumber, final int wireType) {
return (fieldNumber << TAG_TYPE_BITS) | wireType;
}
数字类型存储:tag+value,
字符串存储 :leg+value,leg是字符串的长度
分析字节流: