Version bump to 0.3.0 (#419)

* Extend collection test to validate member item URI (#398)

* Adding DELETE operation to drone collection

* English typos

* Maintaining examples synchronized

* Add crud test for nested objects and refactor other tests (#399)

* Use HydraStatus and HydraError to return status response

* Add a helper function to apply filtering.

* Add helper function to create IriTemplates.

* Use iri_template generator and attach generated iri_template to the colection response.

* Implement searching

* Add support for pagination of search results.

* Add function to include mappings for properties of nested classes in IriTemplate

* Add support for search over nested property values

* Add tests for IriTemplates generated by hydrus.

* Add test for searching mechanism(get_collection())

* Refactor by adding functions for parameter parsing and calculating page limit and offset

* Refactor code by removing redundant check based on value of path variable

* Add exception handling for invalid parameters

* Add mechanism to support client-controlled pagination (#409)

* Add helper function to attach pagination related mappings to the IriTemplate
* Add an exception to handle incomaptible parameters
* Add mechanism to handle client-guided pagination
* Refactor code and add exception for out of range offset value.
* Add tests for client controlled pagination.
* Debug test_pep8.py and make codebase pep8 compatible.

* Update hydrus with latest changes made at core (#411)

* Update hydrus to use updated core and adapt code accordingly.

* Update tests and add test for readable properties.

* Bump version to 0.2.6

* Refactor crud.insert and create new file for other helper functions.

* Add basic socket connection functionality to hydrus.

* Add socketio update event for synchronization.

* Add an endpoint for modification-table-diff.

* Refactor some code and add inline comments.

* Rename new_job_id field in response to job_id.

* Add support to propagate multiple_delete modifications.

* Add sync functionality for PUT and refactor code.

* Add a thread to do routine cleanup of modification records.

* Refactor 'modification-table endpoint' code.

* Add tests for sync updates and modification-table.

* Send an empty response with status-code 204 for outdated clients.

* Use socketio event to send modification-table-diff.

* Add reconnect event and extend tests.

* Refactor and add comments.

* Remove uuid and timestamp, and use incremental ids instead.

* Use incremental job_id instead of timestamp to clean stale records.

* Remove unused imports.

* Use HydraLink to improve handling of nested object props.

* Add links as GraphIII triples instead of GraphIIT triples.

* Add link_prop to assist insertion of linked properties as GraphIII.

* Adapt test for nested fields defined with hydra:Link.

* Refactor insertion of GraphIII triples for link properties.

* Add explicit type check for link properties.

* Use latest hydra-python-core from the master branch.

* Version bump to 0.3.0

* Update hydra-python-core branch to master

cli.py

@@ -2,6 +2,7 @@
 from sqlalchemy.orm import sessionmaker, scoped_session
 
 from hydrus.app_factory import app_factory
+from hydrus.socketio_factory import create_socket
 from hydrus.utils import (set_session, set_doc, set_hydrus_server_url,
                           set_token, set_api_name, set_authentication,
                           set_page_size, set_pagination)
@@ -10,6 +11,7 @@
 from hydrus.data.db_models import Base
 from hydrus.data.user import add_user
 from hydrus.data.exceptions import UserExists
+from hydrus.data.stale_records_cleanup import remove_stale_modification_records
 from gevent.pywsgi import WSGIServer
 from hydra_openapi_parser.openapi_parser import parse
 from hydrus.samples.hydra_doc_sample import doc as api_document
@@ -27,7 +29,7 @@
               help="The API name.", type=str)
 @click.option("--auth/--no-auth", default=True,
               help="Set authentication to True or False.")
-@click.option("--dburl", default="sqlite:///:memory:",
+@click.option("--dburl", default="sqlite:///database.db",
               help="Set database url", type=str)
 @click.option("--hydradoc", "-d", default=None,
               help="Location to HydraDocumentation (JSON-LD) of server.",
@@ -42,10 +44,13 @@
               help="Toggle token based user authentication.")
 @click.option("--serverurl", default="http://localhost",
               help="Set server url", type=str)
+@click.option("--stale_records_removal_interval", default=900,
+              help="Interval period between removal of stale modification records.",
+              type=int)
 @click.argument("serve", required=True)
 def startserver(adduser: Tuple, api: str, auth: bool, dburl: str, pagination: bool,
                 hydradoc: str, port: int, pagesize: int, serverurl: str, token: bool,
-                serve: None) -> None:
+                stale_records_removal_interval: int, serve: None) -> None:
     """
     Python Hydrus CLI
 
@@ -82,8 +87,8 @@ def startserver(adduser: Tuple, api: str, auth: bool, dburl: str, pagination: bo
 
     click.echo("Setting up the database")
     # Create a connection to the database you want to use
-    engine = create_engine(DB_URL)
-
+    engine = create_engine(DB_URL, connect_args={'check_same_thread': False})
+    Base.metadata.drop_all(engine)
     click.echo("Creating models")
     # Add the required Models to the database
     Base.metadata.create_all(engine)
@@ -159,6 +164,8 @@ def startserver(adduser: Tuple, api: str, auth: bool, dburl: str, pagination: bo
     # Create a Hydrus app with the API name you want, default will be "api"
     app = app_factory(API_NAME)
     # Set the name of the API
+    # Create a socket for the app
+    socketio = create_socket(app, session)
     click.echo("Starting the application")
     with set_authentication(app, auth):
         # Use authentication for all requests
@@ -174,17 +181,17 @@ def startserver(adduser: Tuple, api: str, auth: bool, dburl: str, pagination: bo
                             with set_pagination(app, pagination):
                                 # Set page size of a collection view
                                 with set_page_size(app, pagesize):
+                                    # Run a thread to remove stale modification records at some
+                                    # interval of time.
+                                    remove_stale_modification_records(
+                                        session, stale_records_removal_interval)
                                     # Start the hydrus app
-                                    http_server = WSGIServer(('', port), app)
+                                    socketio.run(app, port=port)
                                     click.echo("Server running at:")
                                     click.echo(
                                         "{}{}".format(
                                             HYDRUS_SERVER_URL,
                                             API_NAME))
-                                    try:
-                                        http_server.serve_forever()
-                                    except KeyboardInterrupt:
-                                        pass
 
 
 if __name__ == "__main__":