Service Module Example
Last modified: September 4, 2009 - 03:56
Here is a commented example of a custom service module that uses hook_service() to become a service.
Drupal 6
Under drupal 6.x, one needs to implement hook_disable() and hook_enable() like this:
/*
* Implementation of hook_disable()
* Perform necessary actions before module is disabled. (like clear the services:methods cache)
*/
function yourModuleName_disable() {
cache_clear_all('services:methods', 'cache');
}
/*
* Implementation of hook_disable()
* Perform necessary actions after module is enabled. (like clear the services:methods cache)
*/
function yourModuleName_enable() {
cache_clear_all('services:methods', 'cache');
}otherwise any changes during development are unrecognised because they get cached.
Drupal 5
<?php
/*
* Implementation of hook_service()
* Required by all server modules
* Returns array defining all the methods available in the service
*/
function recipe_service_service() {
return array(
/**
* recipe.all
* We define methods in hashed arrays
*/
array(
/**
* #method - defines the namespace and method name
* the namespace is everything before the last period, so you can do
* methods like 'recipe.lunch.all' where 'recipe.lunch' is the namespace,
* or service, and 'all' is the method
*/
'#method' => 'recipe.all',
// #callback - the php function to map the method call to
'#callback' => 'recipe_service_all',
/**
* #args - a list of method arguments
* These may be in lazy form - array('string','array') with only an array
* of datatypes.
* Or, they may be in in the form of an array of hashed arrays like shown
* below:
*/
'#args' => array(
array(
// #name - the name of the argument
'#name' => 'fields',
// #type - the datatype of the argument
'#type' => 'array',
/**
* #optional - the argument is optional, true or false
* Because php functions cannot have a required argument after an
* optional argument, arguments after an optional argument are set
* to optional regardless of the value of the #optional hash
*/
'#optional' => true,
// #description - Used in the service browser
'#description' => 'A list of fields to filter.'
)
),
// #return - The return data type, may be used by certain server modules
'#return' => 'array',
// #help - Used in the service browser
'#help' => 'Returns a list of recipes'
)
);
}
/**
* Callback for "recipe.all"
* We need to include the fields argument and set a defauld value because
* it is optional,
* We do not need to include an API key or SESSID field if these are enabled
* for Services. These arguments are handled by Services tranparently and
* stripped before we reach this callback.
*/
function recipe_service_all($fields = array()) {
$result = db_query("SELECT nid FROM {node} WHERE type='recipe'");
$nodes = array();
while ($node = db_fetch_object($result)) {
// services_node_load filters a node and returns only the requested fields.
$nodes[] = services_node_load(node_load($node->nid), $fields);
}
// return the array result
return $nodes;
}
?>