谷粒微博：需求、设计及代码框架

软件

HBase2.1.3

需求

• 关注用户
• 取关用户
• 发布微博
• 查看微博

表设计

• 用户关系表
  • uid：当前用户，也就是操作者的编号，格式：具体值/用户id
  • attends：表示用户关注的人，一个人可以关注多个用户
  • fans：表示用户的粉丝，一个人可以有多个粉丝
  • A关注B的同时，B是A的粉丝
  • 示例：
    
• 微博内容表
  • uid_ts：微博的编号，格式：用户id_时间戳
  • content：微博的内容
  • 一条微博占用一行
  • 示例：
    
• 微博收件箱表
  • 显示被关注的人最近发布的3条微博
  • uid：用户编号，格式：用户id
  • info:uid：格式：被关注者的id
  • 时间戳：和weibo:content中微博的时间戳一致
  • 示例：
    

代码框架

第一步：创建Maven项目，添加依赖：

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-client</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-server</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-mapreduce</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-common</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-endpoint</artifactId>
    <version>2.1.3</version>
</dependency>
<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-metrics-api</artifactId>
    <version>2.1.3</version>
</dependency>
<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-thrift</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-auth</artifactId>
    <version>3.1.2</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase.thirdparty</groupId>
    <artifactId>hbase-shaded-netty</artifactId>
    <version>2.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.hbase.thirdparty</groupId>
    <artifactId>hbase-shaded-protobuf</artifactId>
    <version>2.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.hbase.thirdparty</groupId>
    <artifactId>hbase-shaded-miscellaneous</artifactId>
    <version>2.1.0</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-protocol-shaded</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-protocol</artifactId>
    <version>2.1.3</version>
</dependency>

<dependency>
    <groupId>io.dropwizard.metrics</groupId>
    <artifactId>metrics-core</artifactId>
    <version>3.2.6</version>
</dependency>

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>11.0.2</version>
</dependency>


<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-client</artifactId>
    <version>3.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-common</artifactId>
    <version>3.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-hdfs</artifactId>
    <version>3.1.2</version>
</dependency>

第二步：在resources目录中创建log4j.properties

设置###

log4j.rootLogger = debug,stdout,D,E

输出信息到控制抬

log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

输出DEBUG 级别以上的日志到=E://logs/error.log

log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File =logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n

输出ERROR 级别以上的日志到=E://logs/error.log

log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =logs/error.log 
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n