NAME Perinci::Access::InProcess - Use Rinci access protocol (Riap) to access Perl code VERSION version 0.41 SYNOPSIS # in Your/Module.pm package My::Module; our %SPEC; $SPEC{mult2} = { v => 1.1, summary => 'Multiple two numbers', args => { a => { schema=>'float*', req=>1, pos=>0 }, b => { schema=>'float*', req=>1, pos=>1 }, }, examples => [ {args=>{a=>2, b=>3}, result=>6}, ], }; sub mult2 { my %args = @_; [200, "OK", $args{a} * $args{b}]; } $SPEC{multn} = { v => 1.1, summary => 'Multiple many numbers', args => { n => { schema=>[array=>{of=>'float*'}], req=>1, pos=>0, greedy=>1 }, }, }; sub multn { my %args = @_; my @n = @{$args{n}}; my $res = 0; if (@n) { $res = shift(@n); $res *= $_ while $_ = shift(@n); } return [200, "OK", $res]; } 1; # in another file use Perinci::Access::InProcess; my $pa = Perinci::Access::Process->new(); # list all functions in package my $res = $pa->request(list => '/My/Module/', {type=>'function'}); # -> [200, "OK", ['/My/Module/mult2', '/My/Module/multn']] # call function my $res = $pa->request(call => '/My/Module/mult2', {args=>{a=>2, b=>3}}); # -> [200, "OK", 6] # get function metadata $res = $pa->request(meta => '/Foo/Bar/multn'); # -> [200, "OK", {v=>1.1, summary=>'Multiple many numbers', ...}] DESCRIPTION TO REWRITE This class implements Rinci access protocol (Riap) to access local Perl code. This might seem like a long-winded and slow way to access things that are already accessible from Perl like functions and metadata (in %SPEC). Indeed, if you do not need Riap, you can access your module just like any normal Perl module. But Perinci::Access::InProcess (called periai for short) offers several benefits: * Custom location of metadata Metadata can be placed not in %SPEC but elsewhere, like in another file or even database, or even by merging from several sources. * Function wrapping Can be used to convert argument passing style or produce result envelope, so you get a consistent interface. * Transaction/undo This class implements Riap::Transaction. Location of metadata By default, the metadata should be put in %SPEC package variable, in a key with the same name as the URI path leaf (use ":package" for the package itself). For example, metadata for "/Foo/Bar/$var" should be put in $Foo::Bar::SPEC{'$var'}, "/Foo/Bar/" in $Foo::Bar::SPEC{':package'}. The metadata for the top-level namespace ("/") should be put in $main::SPEC{':package'}. Progress indicator periai can also display progress indicator for function that does progress updating. Function expresses that it does progress updating through the "features" property in its metadata: features => { progress => 1, ... } periai will then pass a special argument "-progress" containing Progress::Any object. METHODS PKG->new(%attrs) => OBJ Instantiate object. Known attributes: * load => BOOL (default 1) Whether attempt to load modules using "require". * cache_size => INT (default: 100) Specify cache size (in number of items). Cache saves the result of function wrapping so future requests to the same function need not involve wrapping again. Setting this to 0 disables caching. * after_load => CODE If set, code will be executed the first time Perl module is successfully loaded. * use_wrapped_sub => BOOL (default: 1) If set to false, then wil use original subroutine instead of wrapped one, for example if you are very concerned about performance (do not want to add another eval {} and subroutine call introduced by wrapping) or do not need the functionality provided by the wrapper (e.g. your function does not die and already validates its arguments, etc). Can also be set on a per-entity basis by setting the "_perinci.access.inprocess.use_wrapped_sub" metadata property. * extra_wrapper_args => HASH If set, will be passed to Perinci::Sub::Wrapper's wrap_sub() when wrapping subroutines. Some applications of this include: adding "timeout" or "result_postfilter" properties to functions. * extra_wrapper_convert => HASH If set, will be passed to Perinci::Sub::Wrapper wrap_sub()'s "convert" argument when wrapping subroutines. Some applications of this include: changing "default_lang" of metadata. * use_tx => BOOL (default 0) Whether to allow transaction requests from client. Since this can cause the server to store transaction/undo data, this must be explicitly allowed. You need to install Perinci::Tx::Manager for transaction support (unless you are using another transaction manager). * custom_tx_manager => STR|CODE Can be set to a string (class name) or a code that is expected to return a transaction manager class. By default, Perinci::Tx::Manager is instantiated and maintained (not reinstantiated on every request), but if "custom_tx_manager" is a coderef, it will be called on each request to get transaction manager. This can be used to instantiate Perinci::Tx::Manager in a custom way, e.g. specifying per-user transaction data directory and limits, which needs to be done on a per-request basis. $pa->request($action => $server_url, \%extra) => $res Process Riap request and return enveloped result. $server_url will be used as the Riap request key 'uri', as there is no server in this case. Some notes: * Metadata returned by the 'meta' action has normalized schemas in them Schemas in metadata (like in the "args" and "return" property) are normalized by Perinci::Sub::Wrapper. $pa->parse_url($server_url) => HASH FAQ Why wrap? The wrapping process accomplishes several things, among others: checking of metadata, normalization of schemas in metadata, also argument validation and exception trapping in function. The function wrapping introduces a small overhead when performing a sub call (typically around several to tens of microseconds on an Intel Core i5 1.7GHz notebook). This is usually smaller than the overhead of Perinci::Access::InProcess itself (typically in the range of 100 microseconds). But if you are concerned about the wrapping overhead, see the "use_wrapped_sub" option. Why %SPEC? The name was first chosen when during Sub::Spec era, so it stuck. SEE ALSO Riap, Rinci AUTHOR Steven Haryanto COPYRIGHT AND LICENSE This software is copyright (c) 2013 by Steven Haryanto. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.