GAE Command Line client

The Goal of the project is to create a simple command line client for the Google App Engine datastore, using the Remote API. The tool provides a shell-like command line interface with the following commands:

• namespace $namespace sets the namespace to $namespace for the following commands.
• print $key print a datastore entity. $key is the datastore key, in the form KEY($kind, $name) where $kind is the entity's kind and $name the entity's name. This command loads an entity from the datastore, and print it in JSON format (print all the properties in JSON, including null properties)
• put $key $json store a datastore entity. $key is the datastore key (same format as above) and $json is the entity content in JSON.
• list $kind [$json] [$properties] query the datastore and print the list of matching entities.
  • $kind is the entity kind
  • $json (if present) specifies a list of filters to apply to the search query
  • $properties is the list of properties to print in the output list. If not present, print only the decoded entity keys (in the form KEY($kind, $name) )

The initial purpose of this tool was to do technical support for customers. Altirnao has a SaaS application running on App Engine that does Document Management on top of Google Apps. This application's data is on GAE and from time to time support engineers need to make a modification directly in the datastore to fix a problem or to help a customer.

Note: in order to use this tool you need to enable remote API for a particular project as described in this document https://developers.google.com/appengine/docs/java/tools/remoteapi

Known issues

Application-specific password should be used in case of 2-step verification on google account. Otherwise LoginException with reason "BadAuthentication InvalidSecondFactor" will be thrown.

Examples of usage

Set namespace:

> namespace "-GLOBAL-";
namespace is now "-GLOBAL-"

Load entity:

> print key("Domain", "mycustomer.com");
{
  "domainAdmin" : "admin@mycustomer.com",
  "maxNbUsers" : 12,
  "trialExpires" : "2013-05-31 12:43:02",
  "status" : "ACTIVE"
}

Save entity:

> put key("Domain", "mycustomer.com") {
  "domainAdmin" : "admin@mycustomer.com",
  "maxNbUsers" : 12,
  "trialExpires" : "2013-06-30 00:00:00",
  "status" : "ACTIVE"
};
entity saved successfully at key("Domain", "mycustomer.com")

Using lists:

> print key("Role", "00123412ABCD");
{
  "name" : "Administrators",
  "members" : [ "user1@domain.com", "user2@domain.com" ]
}

> put key("Role", "00123412ABCD") {
  "name" : "Administrators",
  "members" : [ "user1@domain.com", "user2@domain.com", "user3@domain.com" ]
};
entity saved successfully at key("Role", "00123412ABCD")

List all the keys of type "Domain":

> list Domain;
{ key : key("Domain", "abcd.com") }
{ key : key("Domain", "boo.com") }
...
{ key : key("Domain", "xyz.com") }

List only active "Domain"s:

> list Domain { "status" : "ACTIVE" };
{ key : key("Domain", "abcd.com") }
...
{ key : key("Domain", "xyz.com") }

Print the ACTIVE domains with the maxNbUsers and the trialExpires property:

> list Domain { "status" : "ACTIVE" } [ "maxNbUsers", "trialExpires" ];
{ key : key("Domain", "abcd.com"), "maxNbUsers" : 34, "trialExpires" : "2013-03-21 10:28:34" }
...
{ key : key("Domain", "xyz.com"), "maxNbUsers", 89, "trialExpires" : NULL }

Complete list of supported ​data types:

• Int
• Float
• Boolean
• String
• Text
• Date (format)
• Time
• DateTime
• User
• List
• StringList

Build dependencies

• commons-cli-1.2
• commons-io-2.4