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--- architecture [2011/11/15 18:40]
jap [Software architecture]
+++ architecture [2011/11/15 22:07]
jap
@@ Line 33: / Line 33: @@
 Example:\\
 Sensor //Outdoor Air Temperature// of ventilation unit may simultaneously belong to both ventilation measurements group and outdoor weather measurements group.
+=== Initialization ===
+''RamDB'' is located in RAM file system, thus all date is lost each time system boots. Due to that database needs to be re-generated during each boot. There are bunch of scripts that create the database.
+''/etc/rc3.d/S80ha'' -> ''/etc/init.d/ha.sh''
+<file>
+#!/bin/sh
+PATH=/usr/local/bin
+. /lib/lsb/init-functions
+case "$1" in
+    start)
+	createdb.sh
+	;;
+    *)
+	;;
+esac
+</file>
+''/usr/local/bin/createdb.sh''
+<file>
+#!/bin/bash
+PATH=/bin:/sbin:/usr/bin:/usr/sbin
+DB=/lib/init/rw/haram.db
+SQL=/usr/local/share/ha/ramdb.sql
+if [ -e ${DB} ]; then
+    rm ${DB}
+fi
+echo ".exit" | sqlite3 -init ${SQL} ${DB}
+</file>
+''/usr/local/share/ha/ramdb.sql''
+<file>
+CREATE TABLE Variable (
+       VarID INTEGER PRIMARY KEY AUTOINCREMENT,
+       Name TEXT NOT NULL,
+       Device TEXT,
+       Bus TEXT,
+       Type TEXT NOT NULL,
+       Quantity NOT NULL,
+       Unit NOT NULL
+);
+CREATE TABLE Value (
+       VarID INTEGER NOT NULL,
+       Value REAL NOT NULL,
+       Timestamp TIMESTAMP DEFAULT (datetime('now','localtime')),
+       FOREIGNKEY VarID REFERENCES Variable(VarID)
+);
+</file>