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By Bryan Quinn
+Tcl API
Tcl API
apm-install-procs.tcl (Supports installation of packages)
20-apm-load-procs.tcl (Bootstraps APM for server startup)
OpenACS Services: the aforementioned building blocks. Examples of services include the OpenACS Content Repository, the OpenACS Templating -System, and the OpenACS Kernel, which includes +System, and the OpenACS Kernel, which includes APM.
An installation of the OpenACS includes the OpenACS Kernel, some services that extend the kernel's functionality, and some applications intended for -end-users. Packages function as individual pieces of subsites. A subsite can contain multiple +end-users. Packages function as individual pieces of subsites. A subsite can contain multiple application and service instances that provide the end-user with capabilities and content customized to the particular subsite.
This architecture supports the growth of collaborative commerce. For example, Jane User starts a forum focusing on the merits of View Cameras by @@ -82,12 +82,12 @@ cleanly separated from ACS code. Consequently, upgrading an already installed ACS was an error-prone and time-consuming process.
Consistent use of the APM format and tools will go a long way toward solving the maintainability problems listed above. Moreover, APM is the -substrate that will enable us to soon establish a central package repository, -where both ArsDigita and third-party developers will be able publish their -packages for other ACS users to download and install.
For a simple illustration of the difference between ACS without APM +substrate that will enable us to establish a central package repository, +where developers will be able publish their +packages for other OpenACS users to download and install.
For a simple illustration of the difference between ACS without APM (pre-3.3) and ACS with APM (3.3 and beyond), consider a hypothetical ACS installation that uses only two of the thirty-odd modules available circa ACS -3.2 (say, bboard and e-commerce):
APM itself is part of a package, the OpenACS Kernel, an OpenACS +3.2 (say, bboard and e-commerce):
APM itself is part of a package, the OpenACS Kernel, an OpenACS service that is the only mandatory component of an OpenACS installation.
The OpenACS is a platform for web-based application software, and any software platform has the potential to develop problems like those described above. Fortunately, there are many precedents for systematic solutions, @@ -540,4 +540,4 @@ all of this functionality in one interface and it can be confusing from a usability perspective.
System creator: Bryan Quinn, Jon Salz, Michael Yoon, Lars Pind, Todd Nightingale.
System owner: Bryan Quinn
Documentation author: Bryan Quinn, building from earlier versions by Jon -Salz, Michael Yoon, and Lars Pind.