Hive script can be written for tenant as you write in standalone BAM. Only difference here is when you are accessing the cassandra Cassandra event column families, you should include you tenant specific credentials which basically access the data from tenant space of cassandra.In this topic the following sections are covered,Cassandra.
Writing script in WSO2
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local BAM MT
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Writing script in WSO2 local BAM MT Setup
As mentioned above, by changing the cassandra Cassandra data store credentials, we can access run the tenant based hive script. In WSO2 BAM we have separated the tenant space within Hive also, such that it has different logical space to execute the tenant separated queries.
The following is the example of changing the KPI sample hive query:
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CREATE EXTERNAL TABLE IF NOT EXISTS PhoneSalesTable (orderID STRING, brandName STRING, userName STRING, quantity INT, version STRING) STORED BY 'org.apache.hadoop.hive.cassandra.CassandraStorageHandler' WITH SERDEPROPERTIES ( "cassandra.host" = "127.0.0.1" ,"cassandra.port" = "9160" , "cassandra.ks.name" = "EVENT_KS" , "cassandra.ks.username" = "sinthuadmin@sinthu.bam.test.com" , "cassandra.ks.password" = "sinthuadmin" , "cassandra.cf.name" = "org_wso2_bam_phone_retail_store_kpi" , "cassandra.columns.mapping" = ":key,payload_brand, payload_user, payload_quantity, Version" ); CREATE EXTERNAL TABLE IF NOT EXISTS PhonebrandTable(brand STRING, totalOrders INT, totalQuantity INT) STORED BY 'org.wso2.carbon.hadoop.hive.jdbc.storage.JDBCStorageHandler' TBLPROPERTIES ( 'mapred.jdbc.driver.class' = 'org.h2.Driver' , 'mapred.jdbc.url' = 'jdbc:h2:repository/database/samples/WSO2CARBON_DB;AUTO_SERVER=TRUE' , 'mapred.jdbc.username' = 'wso2carbon' , 'mapred.jdbc.password' = 'wso2carbon' , 'hive.jdbc.update.on.duplicate' = 'true' , 'hive.jdbc.primary.key.fields' = 'brand' , 'hive.jdbc.table.create.query' = 'CREATE TABLE brandSummary (brand VARCHAR(100) NOT NULL PRIMARY KEY, totalOrders INT, totalQuantity INT)' ); insert overwrite table PhonebrandTable select brandName, count(DISTINCT orderID), sum(quantity) from PhoneSalesTable where version= "1.0.0" group by brandName; CREATE EXTERNAL TABLE IF NOT EXISTS UserTable( name STRING, totalOrders INT, totalQuantity INT) STORED BY 'org.wso2.carbon.hadoop.hive.jdbc.storage.JDBCStorageHandler' TBLPROPERTIES ( 'mapred.jdbc.driver.class' = 'org.h2.Driver' , 'mapred.jdbc.url' = 'jdbc:h2:repository/database/samples/WSO2CARBON_DB;AUTO_SERVER=TRUE' , 'mapred.jdbc.username' = 'wso2carbon' , 'mapred.jdbc.password' = 'wso2carbon' , 'hive.jdbc.update.on.duplicate' = 'true' , 'hive.jdbc.primary.key.fields' = 'name' , 'hive.jdbc.table.create.query' = 'CREATE TABLE UserSummary (name VARCHAR(100) NOT NULL PRIMARY KEY, totalOrders INT, totalQuantity INT)' ); insert overwrite table UserTable select userName, count(DISTINCT orderID), sum(quantity) from PhoneSalesTable where version= "1.0.0" group by userName; |
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Note the The cassandra storage handler properties , which states state the username and the password. This summarizes and store the stores them in the JDBC table as mentioned in the script. |
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