Marc A. Lehmann > PApp-2.0 > Agni



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Agni - persistent data and objects


This module requires the PApp module to be installed and working. Please read the LICENSE file: this version of Agni is neither GPL nor BSD licensed).


Agni is the God of the Sun and Fire. The rest is obvious...

Most of these functions are low-level stuff. Better look at the methods of the agni root object (本) first, which has most of the functionality packaged in a nicer way.


path_obj_by_gid $path, $gid

Returns a object by gid in a specified path.

path_gid2name $path, $gid

Tries to return the name of the object, or some other descriptive string, in case the object lacks a name. Does not load the object into memory, but might load other objects in memory.

obj2name $obj

Same as path_gid2name, but works on an existing object.

commit_objs [$gid, $src_path, $dst_path], ...

Commit (copy) objects from one path to another. If $dst_path is undefined or missing, deletes the object.

Currently, $src_path must be the "topmost" path of one object instace, undefined behaviour will result if the instance exists in a path higher than $src_path.

It returns a html fragment describing it's operations.

 # delete the root object (gid 1) from the staging path
 Agni::commit_objs [1, $Agni::pathid{"root/staging/"}, undef];

 # kind of read-modify-write for an object
 # 1. get an object into the staging path
 my $sobj = $obj->to_staging_path;
 # 2. modify it
 $sobj->{...} = ...;
 # 3a. either commit it ("save changes"):
 Agni::commit_objs [$sobj->{_gid}, $sobj->{_path}, $obj->{_path}];
 # 3b. or delete it ("cancel"):
 Agni::commit_objs [$sobj->{_gid}, $sobj->{_path}, undef];
agni_exec { BLOCK };

Execute the given perl block in an agni-environment (i.e. database set up correctly etc.).


Refresh the database connection and the $PApp::NOW timestamp, and also checks for events (e.g. write accesses) done by other agni processes. Usually called within agni_exec after some time has progressed.

Might do other things in the future.


The bin/agni commandline tool, the agni online documentation.


 Marc Lehmann <>
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