StreamGraph::haSource

StreamGraph::haSource(name, colNames, colTypes, raftGroup, cacheLimit, [retentionMinutes=1440])

Creates a high-availability stream table. For details, see haStreamTable.

Return value: A DStream object.

name is a string representing the name of the Orca stream table. You can provide either the fully qualified name (FQN), such as "trading.orca_table.factors", or just the table name, like "factors". If only the name is given, the system will automatically complete it using the current catalog.

colNames is a STRING vector of column names.

colTypes is a STRING vector of data types. It can use either the reserved words for data types or corresponding strings.

raftGroup can be either an integer greater than 1 or a string.

• Integer: represents the raft group ID.
• String: represents a raft group alias, which must be preconfigured via streamingRaftGroupAliases.

if (!existsCatalog("orca")) {
	createCatalog("orca")
}
go
use catalog orca

g = createStreamGraph("indicators")
g.haSource("ha_table", 1:0, `time`symbol`price`volume, [DATETIME,SYMBOL,DOUBLE,LONG], 3, 50000)