标签:des style blog ar io color os sp for
akka-persistence-hbase-master是负责akka持久化的组件,采用async方式来操作hbase,讲akka的日志持久化到hbase中。
akka-persistence-hbase-master持久化之前首先要创建Journal表,关于表的配置存放在application.conf文件中,
akka.persistence.hbase.journal.HBaseJournalInit对象负责关于Journal表的管理,获取hbase配置的代码如下:
def getHBaseConfig(config: Config): Configuration = { val c = new Configuration() val journalConfig = config.getConfig("hbase-journal")//获取hbase-journal标签的配置 val hbaseConfig = journalConfig.getConfig("hadoop-pass-through")//获取hadoop-pass-through下的配置 //将获取到的配置按照key:value的形式返回(与hbase-site.xml的配置相同) hbaseConfig.entrySet().asScala foreach { e => c.set(e.getKey, e.getValue.unwrapped.toString) } c }
获取到配置后,还需要表名和列族名才可以创建表,akka-persistence-hbase-master默认创建的表名为"akka_messages",列族名为"message",如需修改,可在application.conf文件的hbase-journal标签下添加如下配置:
table = "tablename" family = "familyname"
配置,表名,列族名都拿到之后,就会执行doInitTable方法(创建表依旧采用hbase自带的hbaseadmin来创建),代码如下:
private def doInitTable(admin: HBaseAdmin, tableName: String, familyName: String): Boolean = { if (admin.tableExists(tableName)) { val tableDesc = admin.getTableDescriptor(toBytes(tableName)) if (tableDesc.getFamily(toBytes(familyName)) == null) { // target family does not exists, will add it. admin.addColumn(familyName, new HColumnDescriptor(familyName)) true } else { // existing table is OK, no modifications run. false } } else { val tableDesc = new HTableDescriptor(toBytes(tableName)) tableDesc.addFamily(new HColumnDescriptor(familyName)) admin.createTable(tableDesc) true } }
创建Journal表之后还会创建snapshot表,步骤与Journal类似。
之后还会执行Thread.sleep(2000)
akka-persistence-hbase-master源码分析之创建Journal表
标签:des style blog ar io color os sp for
原文地址:http://www.cnblogs.com/zhangyukun/p/4168790.html