Handle all ressource events with unified sqlalchemy event handlers.

app/corpora/tasks.py

@@ -1,4 +1,4 @@
-from .. import db, socketio
+from .. import db
 from ..decorators import background
 from ..models import Corpus, CorpusFile, QueryResult
 
@@ -12,11 +12,6 @@ def build_corpus(corpus_id, *args, **kwargs):
             raise Exception('Corpus {} not found'.format(corpus_id))
         corpus.build()
         db.session.commit()
-        event = 'user_{}_patch'.format(corpus.user_id)
-        jsonpatch = [{'op': 'replace', 'path': '/corpora/{}/last_edited_date'.format(corpus.id), 'value': corpus.last_edited_date.timestamp()},  # noqa
-                     {'op': 'replace', 'path': '/corpora/{}/status'.format(corpus.id), 'value': corpus.status}]  # noqa
-        room = 'user_{}'.format(corpus.user_id)
-        socketio.emit(event, jsonpatch, room=room)
 
 
 @background
@@ -25,12 +20,8 @@ def delete_corpus(corpus_id, *args, **kwargs):
         corpus = Corpus.query.get(corpus_id)
         if corpus is None:
             raise Exception('Corpus {} not found'.format(corpus_id))
-        event = 'user_{}_patch'.format(corpus.user_id)
-        jsonpatch = [{'op': 'remove', 'path': '/corpora/{}'.format(corpus.id)}]
-        room = 'user_{}'.format(corpus.user_id)
         corpus.delete()
         db.session.commit()
-        socketio.emit(event, jsonpatch, room=room)
 
 
 @background
@@ -39,13 +30,8 @@ def delete_corpus_file(corpus_file_id, *args, **kwargs):
         corpus_file = CorpusFile.query.get(corpus_file_id)
         if corpus_file is None:
             raise Exception('Corpus file {} not found'.format(corpus_file_id))
-        event = 'user_{}_patch'.format(corpus_file.corpus.user_id)
-        jsonpatch = [{'op': 'remove', 'path': '/corpora/{}/files/{}'.format(corpus_file.corpus_id, corpus_file.id)},  # noqa
-                     {'op': 'replace', 'path': '/corpora/{}/status'.format(corpus_file.corpus_id), 'value': corpus_file.corpus.status}]  # noqa
-        room = 'user_{}'.format(corpus_file.corpus.user_id)
         corpus_file.delete()
         db.session.commit()
-        socketio.emit(event, jsonpatch, room=room)
 
 
 @background
@@ -54,9 +40,5 @@ def delete_query_result(query_result_id, *args, **kwargs):
         query_result = QueryResult.query.get(query_result_id)
         if query_result is None:
             raise Exception('QueryResult {} not found'.format(query_result_id))
-        event = 'user_{}_patch'.format(query_result.user_id)
-        jsonpatch = [{'op': 'remove', 'path': '/query_results/{}'.format(query_result.id)}]  # noqa
-        room = 'user_{}'.format(query_result.user_id)
         query_result.delete()
         db.session.commit()
-        socketio.emit(event, jsonpatch, room=room)

app/corpora/views.py

@@ -8,7 +8,7 @@ from .forms import (AddCorpusFileForm, AddCorpusForm, AddQueryResultForm,
                     DisplayOptionsForm, InspectDisplayOptionsForm,
                     ImportCorpusForm)
 from jsonschema import validate
-from .. import db, socketio
+from .. import db
 from ..models import Corpus, CorpusFile, QueryResult
 import json
 import logging
@@ -40,10 +40,6 @@ def add_corpus():
         else:
             db.session.commit()
             flash('Corpus "{}" added!'.format(corpus.title), 'corpus')
-            event = 'user_{}_patch'.format(corpus.user_id)
-            jsonpatch = [{'op': 'add', 'path': '/corpora/{}'.format(corpus.id), 'value': corpus.to_dict()}]  # noqa
-            room = 'user_{}'.format(corpus.user_id)
-            socketio.emit(event, jsonpatch, room=room)
             return redirect(url_for('.corpus', corpus_id=corpus.id))
     return render_template('corpora/add_corpus.html.j2', form=form,
                            title='Add corpus')
@@ -106,10 +102,6 @@ def import_corpus():
             db.session.commit()
             os.remove(archive_file)
             flash('Corpus "{}" imported!'.format(corpus.title), 'corpus')
-            event = 'user_{}_patch'.format(corpus.user_id)
-            jsonpatch = [{'op': 'add', 'path': '/corpora/{}'.format(corpus.id), 'value': corpus.to_dict()}]  # noqa
-            room = 'user_{}'.format(corpus.user_id)
-            socketio.emit(event, jsonpatch, room=room)
             return make_response(
                 {'redirect_url': url_for('.corpus', corpus_id=corpus.id)}, 201)
         else:
@@ -212,11 +204,6 @@ def add_corpus_file(corpus_id):
         corpus.status = 'unprepared'
         db.session.commit()
         flash('Corpus file "{}" added!'.format(corpus_file.filename), 'corpus')
-        event = 'user_{}_patch'.format(corpus.user_id)
-        jsonpatch = [{'op': 'replace', 'path': '/corpora/{}/status'.format(corpus.id), 'value': corpus.status},  # noqa
-                     {'op': 'add', 'path': '/corpora/{}/files/{}'.format(corpus.id, corpus_file.id), 'value': corpus_file.to_dict()}]  # noqa
-        room = 'user_{}'.format(corpus.user_id)
-        socketio.emit(event, jsonpatch, room=room)
         return make_response({'redirect_url': url_for('.corpus', corpus_id=corpus.id)}, 201)  # noqa
     return render_template('corpora/add_corpus_file.html.j2', corpus=corpus,
                            form=form, title='Add corpus file')
@@ -356,10 +343,6 @@ def add_query_result():
         query_result_file_content.pop('cpos_lookup')
         query_result.query_metadata = query_result_file_content
         db.session.commit()
-        event = 'user_{}_patch'.format(query_result.user_id)
-        jsonpatch = [{'op': 'add', 'path': '/query_results/{}'.format(query_result.id), 'value': query_result.to_dict()}]  # noqa
-        room = 'user_{}'.format(query_result.user_id)
-        socketio.emit(event, jsonpatch, room=room)
         flash('Query result added!', 'result')
         return make_response({'redirect_url': url_for('.query_result', query_result_id=query_result.id)}, 201)  # noqa
     return render_template('corpora/query_results/add_query_result.html.j2',

app/sqlalchemy_events.py

@@ -1,161 +1,112 @@
+from datetime import datetime
 from . import db, socketio
-from .models import Job, JobInput, JobResult
+from .models import Corpus, CorpusFile, Job, JobInput, JobResult
-import logging
 
 
 ###############################################################################
 # SQLAlchemy event handlers                                                   #
 ###############################################################################
+@db.event.listens_for(Corpus, 'after_delete')
+@db.event.listens_for(CorpusFile, 'after_delete')
+@db.event.listens_for(Job, 'after_delete')
+@db.event.listens_for(JobInput, 'after_delete')
+@db.event.listens_for(JobResult, 'after_delete')
+def ressource_after_delete(mapper, connection, ressource):
+    if isinstance(ressource, Corpus):
+        user_id = ressource.creator.id
+        path = '/corpora/{}'.format(ressource.id)
+    elif isinstance(ressource, CorpusFile):
+        user_id = ressource.corpus.creator.id
+        path = '/corpora/{}/files/{}'.format(ressource.corpus.id, ressource.id)
+    elif isinstance(ressource, Job):
+        user_id = ressource.creator.id
+        path = '/jobs/{}'.format(ressource.id)
+    elif isinstance(ressource, JobInput):
+        user_id = ressource.job.creator.id
+        path = '/jobs/{}/inputs/{}'.format(ressource.job.id, ressource.id)
+    elif isinstance(ressource, JobResult):
+        user_id = ressource.job.creator.id
+        path = '/jobs/{}/results/{}'.format(ressource.job.id, ressource.id)
+    event = 'user_{}_patch'.format(user_id)
+    jsonpatch = [{'op': 'remove', 'path': path}]
+    room = 'user_{}'.format(user_id)
+    socketio.emit(event, jsonpatch, room=room)
 
-###############################################################################
+@db.event.listens_for(Corpus, 'after_insert')
-## Job events                                                                 #
+@db.event.listens_for(CorpusFile, 'after_insert')
-###############################################################################
+@db.event.listens_for(Job, 'after_insert')
+@db.event.listens_for(JobInput, 'after_insert')
+@db.event.listens_for(JobResult, 'after_insert')
+def ressource_after_insert_handler(mapper, connection, ressource):
+    if isinstance(ressource, Corpus):
+        user_id = ressource.creator.id
+        path = '/corpora/{}'.format(ressource.id)
+    elif isinstance(ressource, CorpusFile):
+        user_id = ressource.corpus.creator.id
+        path = '/corpora/{}/files/{}'.format(ressource.corpus.id, ressource.id)
+    elif isinstance(ressource, Job):
+        user_id = ressource.creator.id
+        path = '/jobs/{}'.format(ressource.id)
+    elif isinstance(ressource, JobInput):
+        user_id = ressource.job.creator.id
+        path = '/jobs/{}/inputs/{}'.format(ressource.job.id, ressource.id)
+    elif isinstance(ressource, JobResult):
+        user_id = ressource.job.creator.id
+        path = '/jobs/{}/results/{}'.format(ressource.job.id, ressource.id)
+    event = 'user_{}_patch'.format(user_id)
+    jsonpatch = [
+        {
+            'op': 'add',
+            'path': path,
+            'value': ressource.to_dict(include_relationships=False)
+        }
+    ]
+    room = 'user_{}'.format(user_id)
+    socketio.emit(event, jsonpatch, room=room)
+
+@db.event.listens_for(Corpus, 'after_update')
+@db.event.listens_for(CorpusFile, 'after_update')
 @db.event.listens_for(Job, 'after_update')
-def after_job_update(mapper, connection, job):
+@db.event.listens_for(JobInput, 'after_update')
+@db.event.listens_for(JobResult, 'after_update')
+def ressource_after_update_handler(mapper, connection, ressource):
+    if isinstance(ressource, Corpus):
+        user_id = ressource.creator.id
+        base_path = '/corpora/{}'.format(ressource.id)
+    elif isinstance(ressource, CorpusFile):
+        user_id = ressource.corpus.creator.id
+        base_path = '/corpora/{}/files/{}'.format(ressource.corpus.id,
+                                                  ressource.id)
+    elif isinstance(ressource, Job):
+        user_id = ressource.creator.id
+        base_path = '/jobs/{}'.format(ressource.id)
+    elif isinstance(ressource, JobInput):
+        user_id = ressource.job.creator.id
+        base_path = '/jobs/{}/inputs/{}'.format(ressource.job.id, ressource.id)
+    elif isinstance(ressource, JobResult):
+        user_id = ressource.job.creator.id
+        base_path = '/jobs/{}/results/{}'.format(ressource.job.id,
+                                                 ressource.id)
     jsonpatch = []
-    for attr in db.inspect(job).attrs:
+    for attr in db.inspect(ressource).attrs:
         # We don't want to emit changes about relationship fields
-        if attr.key in ['inputs', 'results']:
+        if attr.key in ['files', 'inputs', 'results']:
             continue
         history = attr.load_history()
         if not history.has_changes():
             continue
         new_value = history.added[0]
         # DateTime attributes must be converted to a timestamp
-        if attr.key in ['creation_date', 'end_date']:
+        if isinstance(new_value, datetime):
-            new_value = None if new_value is None else new_value.timestamp()
+            new_value = new_value.timestamp()
         jsonpatch.append(
             {
                 'op': 'replace',
-                'path': '/jobs/{}/{}'.format(job.id, attr.key),
+                'path': '{}/{}'.format(base_path, attr.key),
                 'value': new_value
             }
         )
     if jsonpatch:
-        event = 'user_{}_patch'.format(job.user_id)
+        event = 'user_{}_patch'.format(user_id)
-        room = 'user_{}'.format(job.user_id)
+        room = 'user_{}'.format(user_id)
         socketio.emit(event, jsonpatch, room=room)
-
-@db.event.listens_for(Job, 'after_insert')
-def after_job_insert(mapper, connection, job):
-    event = 'user_{}_patch'.format(job.user_id)
-    jsonpatch = [
-        {
-            'op': 'add',
-            'path': '/jobs/{}'.format(job.id),
-            'value': job.to_dict(include_relationships=False)
-        }
-    ]
-    room = 'user_{}'.format(job.user_id)
-    socketio.emit(event, jsonpatch, room=room)
-
-@db.event.listens_for(Job, 'after_delete')
-def after_job_delete(mapper, connection, job):
-    event = 'user_{}_patch'.format(job.user_id)
-    jsonpatch = [{'op': 'remove', 'path': '/jobs/{}'.format(job.id)}]
-    room = 'user_{}'.format(job.user_id)
-    socketio.emit(event, jsonpatch, room=room)
-
-###############################################################################
-## JobInput events                                                            #
-###############################################################################
-@db.event.listens_for(JobInput, 'after_update')
-def after_job_input_update(mapper, connection, job_input):
-    jsonpatch = []
-    for attr in db.inspect(job_input).attrs:
-        history = attr.load_history()
-        if not history.has_changes():
-            continue
-        new_value = history.added[0]
-        jsonpatch.append(
-            {
-                'op': 'replace',
-                'path': '/jobs/{}/inputs/{}/{}'.format(job_input.job_id,
-                                                       job_input.id,
-                                                       attr.key),
-                'value': new_value
-            }
-        )
-    if jsonpatch:
-        event = 'user_{}_patch'.format(job_input.job.user_id)
-        room = 'user_{}'.format(job_input.job.user_id)
-        socketio.emit(event, jsonpatch, room=room)
-
-@db.event.listens_for(JobInput, 'after_insert')
-def after_job_input_insert(mapper, connection, job_input):
-    event = 'user_{}_patch'.format(job_input.job.user_id)
-    jsonpatch = [
-        {
-            'op': 'add',
-            'path': '/jobs/{}/inputs/{}'.format(job_input.job_id,
-                                                job_input.id),
-            'value': job_input.to_dict(include_relationships=False)
-        }
-    ]
-    room = 'user_{}'.format(job_input.job.user_id)
-    socketio.emit(event, jsonpatch, room=room)
-
-@db.event.listens_for(JobInput, 'after_delete')
-def after_job_input_delete(mapper, connection, job_input):
-    event = 'user_{}_patch'.format(job_input.job.user_id)
-    jsonpatch = [
-        {
-            'op': 'remove',
-            'path': '/jobs/{}/inputs/{}'.format(job_input.job_id,
-                                                job_input.id)
-        }
-    ]
-    room = 'user_{}'.format(job_input.job.user_id)
-    socketio.emit(event, jsonpatch, room=room)
-
-###############################################################################
-## JobResult events                                                           #
-###############################################################################
-@db.event.listens_for(JobResult, 'after_update')
-def after_job_result_update(mapper, connection, job_result):
-    jsonpatch = []
-    for attr in db.inspect(job_result).attrs:
-        history = attr.load_history()
-        if not history.has_changes():
-            continue
-        new_value = history.added[0]
-        jsonpatch.append(
-            {
-                'op': 'replace',
-                'path': '/jobs/{}/results/{}/{}'.format(job_result.job_id,
-                                                        job_result.id,
-                                                        attr.key),
-                'value': new_value
-            }
-        )
-    if jsonpatch:
-        event = 'user_{}_patch'.format(job_result.job.user_id)
-        room = 'user_{}'.format(job_result.job.user_id)
-        socketio.emit(event, jsonpatch, room=room)
-
-@db.event.listens_for(JobResult, 'after_insert')
-def after_job_result_insert(mapper, connection, job_result):
-    event = 'user_{}_patch'.format(job_result.job.user_id)
-    jsonpatch = [
-        {
-            'op': 'add',
-            'path': '/jobs/{}/results/{}'.format(job_result.job_id,
-                                                 job_result.id),
-            'value': job_result.to_dict(include_relationships=False)
-        }
-    ]
-    room = 'user_{}'.format(job_result.job.user_id)
-    socketio.emit(event, jsonpatch, room=room)
-
-@db.event.listens_for(JobResult, 'after_delete')
-def after_job_result_delete(mapper, connection, job_result):
-    event = 'user_{}_patch'.format(job_result.job.user_id)
-    jsonpatch = [
-        {
-            'op': 'remove',
-            'path': '/jobs/{}/results/{}'.format(job_result.job_id,
-                                                 job_result.id)
-        }
-    ]
-    room = 'user_{}'.format(job_result.job.user_id)
-    socketio.emit(event, jsonpatch, room=room)

app/tasks/__init__.py

@@ -7,48 +7,8 @@ import docker
 class TaskRunner(CheckCorporaMixin, CheckJobsMixin):
     def __init__(self):
         self.docker = docker.from_env()
-        self._socketio_message_buffer = {}
 
     def run(self):
         self.check_corpora()
         self.check_jobs()
         db.session.commit()
-        self.flush_socketio_messages()
-
-    def buffer_socketio_message(self, event, payload, room,
-                                msg_id=None, override_policy='replace'):
-        if room not in self._socketio_message_buffer:
-            self._socketio_message_buffer[room] = {}
-        if event not in self._socketio_message_buffer[room]:
-            self._socketio_message_buffer[room][event] = {}
-        if msg_id is None:
-            msg_id = len(self._socketio_message_buffer[room][event].keys())
-        if override_policy == 'append':
-            if msg_id in self._socketio_message_buffer[room][event]:
-                # If the current message value isn't a list, convert it!
-                if not isinstance(self._socketio_message_buffer[room][event][msg_id], list):  # noqa
-                    self._socketio_message_buffer[room][event][msg_id] = [self._socketio_message_buffer[room][event][msg_id]]  # noqa
-            else:
-                self._socketio_message_buffer[room][event][msg_id] = []
-            self._socketio_message_buffer[room][event][msg_id].append(payload)
-        elif override_policy == 'replace':
-            self._socketio_message_buffer[room][event][msg_id] = payload
-        else:
-            raise Exception('Unknown override policy: {}'.format(override_policy))  # noqa
-        return msg_id
-
-    def buffer_user_patch_operation(self, ressource, patch_operation):
-        self.buffer_socketio_message('user_{}_patch'.format(ressource.user_id),
-                                     patch_operation,
-                                     'user_{}'.format(ressource.user_id),
-                                     msg_id='_', override_policy='append')
-
-    def clear_socketio_message_buffer(self):
-        self._socketio_message_buffer = {}
-
-    def flush_socketio_messages(self):
-        for room in self._socketio_message_buffer:
-            for event in self._socketio_message_buffer[room]:
-                for message in self._socketio_message_buffer[room][event]:
-                    socketio.emit(event, self._socketio_message_buffer[room][event][message], room=room)  # noqa
-        self.clear_socketio_message_buffer()

app/tasks/corpus_utils.py

@@ -85,12 +85,6 @@ class CheckCorporaMixin:
             )
         else:
             corpus.status = 'queued'
-            patch_operation = {
-                'op': 'replace',
-                'path': '/corpora/{}/status'.format(corpus.id),
-                'value': corpus.status
-            }
-            self.buffer_user_patch_operation(corpus, patch_operation)
 
     def checkout_build_corpus_service(self, corpus):
         service_name = 'build-corpus_{}'.format(corpus.id)
@@ -103,12 +97,6 @@ class CheckCorporaMixin:
                 + '(corpus.status: {} -> failed)'.format(corpus.status)
             )
             corpus.status = 'failed'
-            patch_operation = {
-                'op': 'replace',
-                'path': '/corpora/{}/status'.format(corpus.id),
-                'value': corpus.status
-            }
-            self.buffer_user_patch_operation(corpus, patch_operation)
         except docker.errors.APIError as e:
             logging.error(
                 'Get "{}" service raised '.format(service_name)
@@ -128,12 +116,6 @@ class CheckCorporaMixin:
             task_state = service_tasks[0].get('Status').get('State')
             if corpus.status == 'queued' and task_state != 'pending':
                 corpus.status = 'running'
-                patch_operation = {
-                    'op': 'replace',
-                    'path': '/corpora/{}/status'.format(corpus.id),
-                    'value': corpus.status
-                }
-                self.buffer_user_patch_operation(corpus, patch_operation)
             elif (corpus.status == 'running'
                   and task_state in ['complete', 'failed']):
                 try:
@@ -148,12 +130,6 @@ class CheckCorporaMixin:
                 else:
                     corpus.status = \
                         'prepared' if task_state == 'complete' else 'failed'
-                    patch_operation = {
-                        'op': 'replace',
-                        'path': '/corpora/{}/status'.format(corpus.id),
-                        'value': corpus.status
-                    }
-                    self.buffer_user_patch_operation(corpus, patch_operation)
 
     def create_cqpserver_container(self, corpus):
         ''' # Docker container settings # '''
@@ -214,12 +190,6 @@ class CheckCorporaMixin:
                 + 'non-zero exit code and detach is False.'
             )
             corpus.status = 'failed'
-            patch_operation = {
-                'op': 'replace',
-                'path': '/corpora/{}/status'.format(corpus.id),
-                'value': corpus.status
-            }
-            self.buffer_user_patch_operation(corpus, patch_operation)
         except docker.errors.ImageNotFound:
             logging.error(
                 'Run "{}" container raised '.format(name)
@@ -227,12 +197,6 @@ class CheckCorporaMixin:
                 + 'exist.'
             )
             corpus.status = 'failed'
-            patch_operation = {
-                'op': 'replace',
-                'path': '/corpora/{}/status'.format(corpus.id),
-                'value': corpus.status
-            }
-            self.buffer_user_patch_operation(corpus, patch_operation)
         except docker.errors.APIError as e:
             logging.error(
                 'Run "{}" container raised '.format(name)
@@ -241,12 +205,6 @@ class CheckCorporaMixin:
             )
         else:
             corpus.status = 'analysing'
-            patch_operation = {
-                'op': 'replace',
-                'path': '/corpora/{}/status'.format(corpus.id),
-                'value': corpus.status
-            }
-            self.buffer_user_patch_operation(corpus, patch_operation)
 
     def checkout_analysing_corpus_container(self, corpus):
         container_name = 'cqpserver_{}'.format(corpus.id)
@@ -255,12 +213,6 @@ class CheckCorporaMixin:
         except docker.errors.NotFound:
             logging.error('Could not find "{}" but the corpus state is "analysing".')  # noqa
             corpus.status = 'prepared'
-            patch_operation = {
-                'op': 'replace',
-                'path': '/corpora/{}/status'.format(corpus.id),
-                'value': corpus.status
-            }
-            self.buffer_user_patch_operation(corpus, patch_operation)
         except docker.errors.APIError as e:
             logging.error(
                 'Get "{}" container raised '.format(container_name)
@@ -293,9 +245,3 @@ class CheckCorporaMixin:
                 )
                 return
         corpus.status = 'prepared'
-        patch_operation = {
-            'op': 'replace',
-            'path': '/corpora/{}/status'.format(corpus.id),
-            'value': corpus.status
-        }
-        self.buffer_user_patch_operation(corpus, patch_operation)