islandora/islandora_collection/islandora_collection.module

<?php

/**
 * @file
 * This is the new Islandora Collection module.
 */

define('ISLANDORA_COLLECTION_CONTENT_TYPE', 'islandora_collection');
define('ISLANDORA_COLLECTION_RDF_TYPE', 'islandora:collection');

/**
 * Implements hook_views_api().
 */
function islandora_collection_views_api() {
  return array(
    'api' => 3.0,
    'path' => drupal_get_path('module', 'islandora_collection') . '/include',
  );
}

/**
 * Implements hook_node_info().
 */
function islandora_collection_node_info() {
  return array(
    ISLANDORA_COLLECTION_CONTENT_TYPE => array(
      'name' => t("Collection"),
      'base' => ISLANDORA_COLLECTION_CONTENT_TYPE,
      'description' => t("A Drupal node modeling an pcdm:Collection."),
    ),
  );
}

/**
 * Implements hook_form().
 */
function islandora_collection_form($node, array &$form_state) {
  return node_content_form($node, $form_state);
}

/**
 * Implements hook_rdf_mapping().
 */
function islandora_collection_rdf_mapping() {
  module_load_include('inc', 'islandora', 'include/rdf_mapping');
  return islandora_get_default_rdf_mapping(ISLANDORA_COLLECTION_CONTENT_TYPE, ISLANDORA_COLLECTION_RDF_TYPE);
}

/**
 * Implements hook_node_postinsert().
 */
function islandora_collection_node_postinsert($node) {
  // Exit early if it's not a collection.
  if (strcmp($node->type, ISLANDORA_COLLECTION_CONTENT_TYPE) != 0) {
    return;
  }

  $nodes = entity_uuid_load('node', array($node->uuid));

  // Exit early if the node never was successfully inserted in the database.
  if (empty($nodes)) {
    return;
  }

  $node = array_pop($nodes);
  $response = drupal_http_request("http://localhost:8080/islandora-services/rest/collection",
                                  array(
                                    'method' => 'POST',
                                    'data' => json_encode($node),
                                  ));

  dd("RESPONSE");
  dd($response->data);
}

/**
 * Implements hook_update().
 */
function islandora_collection_node_postupdate($node) {
  dd("FROM POST UPDATE HOOK");
}