Support for initial container population file.

src/modules/dbxmldatabases.py

@@ -30,6 +30,7 @@ import sys
 
 import bsddb3.db as db
 import dbxml
+import libxml2
 
 import expression.core.environs as environs
 import expression.core.dataholders as dataholders
@@ -80,7 +81,8 @@ def __init__():
     """
     DbXmlDatabase._environment = db.DBEnv()
     DbXmlDatabase._environment.set_shm_key(35)
-    dbHome = environs.getVar("configuration").getConfigAbsolutePath(
+    configuration = environs.getVar("configuration")
+    dbHome = configuration.getConfigAbsolutePath(
         """yep:module[@name="%s"]/yep:environment/@dbHome""" % __init__.__module__,
         "/var/lib/expression/db"
     )
@@ -101,15 +103,36 @@ def __init__():
     DbXmlDatabase._containers = {}
     for name in environs.getVar("configuration").getConfigList("""yep:module[@name="%s"]/yep:container/@name""" % __init__.__module__):
         try:
-            DbXmlDatabase._containers[name] = DbXmlDatabase._manager.openContainer(
+            container = DbXmlDatabase._manager.openContainer(
                 name, 0
-                |db.DB_CREATE
                 |dbxml.DBXML_CHKSUM
             )
         except RuntimeError:
-            logs.error("Could not open container %s" % name)
-            __del__()
-            raise
+            logs.debug("Container %s was not found. Creating it." % name)
+            try:
+                container = DbXmlDatabase._manager.createContainer(
+                    name, 0
+                    |dbxml.DBXML_CHKSUM
+                )
+            except RuntimeError:
+                logs.error("Could not open nor create container %s." % name)
+                __del__()
+                raise
+            else:
+                populationPath = configuration.getConfigAbsolutePath(
+                    """yep:module[@name="%s"]/yep:population/@path""" % __init__.__module__,
+                )
+                if populationPath:
+                    populationDoc = libxml2.readFile(populationPath, "utf-8", 0)
+                    setNode = populationDoc.getRootElement()
+                    updateContext = container.getManager().createUpdateContext()
+                    for documentNode in setNode.xpathEval("container[@name='%s']/*" % name):
+                        for node in documentNode.xpathEval("*"):
+                            doc = libxml2.newDoc("1.0")
+                            doc.setRootElement(node)
+                            container.putDocument(documentNode.prop("name"), doc.serialize(), updateContext)
+        DbXmlDatabase._containers[name] = container
+
 
 def __del__():
     """ Closes containers and the database environment.