public LoadedCompositeEntity getEntityById(CassandraPersistenceSession session, String id) {
LoadedCompositeEntity loadedProcessInstance = new LoadedCompositeEntity();
Session s = session.getSession();
Row row = s.execute(select().all().from(TABLE_NAME).where(eq("id", id))).one();
if (row == null) {
return null;
}
int version = row.getInt("version");
String businessKey = row.getString("business_key");
CassandraSerializer<ExecutionEntity> executionSerializer =
session.getSerializer(ExecutionEntity.class);
CassandraSerializer<EventSubscriptionEntity> eventSubscriptionSerializer =
session.getSerializer(EventSubscriptionEntity.class);
CassandraSerializer<VariableInstanceEntity> variableSerializer =
session.getSerializer(VariableInstanceEntity.class);
// deserialize all executions
Map<String, UDTValue> executionsMap = row.getMap(EXECUTIONS, String.class, UDTValue.class);
Map<String, ExecutionEntity> executions = new HashMap<String, ExecutionEntity>();
for (UDTValue serializedExecution : executionsMap.values()) {
ExecutionEntity executionEntity = executionSerializer.read(serializedExecution);
executions.put(executionEntity.getId(), executionEntity);
if (executionEntity.isProcessInstanceExecution()) {
loadedProcessInstance.setMainEntity(executionEntity);
}
}
loadedProcessInstance.put(EXECUTIONS, executions);
// deserialize all event subscription
Map<String, UDTValue> eventSubscriptionsMap =
row.getMap(EVENT_SUBSCRIPTIONS, String.class, UDTValue.class);
Map<String, EventSubscriptionEntity> eventSubscriptions =
new HashMap<String, EventSubscriptionEntity>();
for (UDTValue serializedEventSubscription : eventSubscriptionsMap.values()) {
EventSubscriptionEntity eventSubscriptionEntity =
eventSubscriptionSerializer.read(serializedEventSubscription);
eventSubscriptions.put(eventSubscriptionEntity.getId(), eventSubscriptionEntity);
}
loadedProcessInstance.put(EVENT_SUBSCRIPTIONS, eventSubscriptions);
// deserialize all variables
Map<String, UDTValue> variablesMap = row.getMap(VARIABLES, String.class, UDTValue.class);
Map<String, VariableInstanceEntity> variables = new HashMap<String, VariableInstanceEntity>();
for (UDTValue serializedVariable : variablesMap.values()) {
VariableInstanceEntity variableEntity = variableSerializer.read(serializedVariable);
variables.put(variableEntity.getId(), variableEntity);
}
loadedProcessInstance.put(VARIABLES, variables);
reconstructEntityTree(loadedProcessInstance);
ExecutionEntity processInstance = (ExecutionEntity) loadedProcessInstance.getPrimaryEntity();
processInstance.setRevision(version);
processInstance.setBusinessKey(businessKey);
ProcessInstanceBatch batch =
new ProcessInstanceBatch((ExecutionEntity) loadedProcessInstance.getPrimaryEntity());
LOG.fine(
"Loaded process instance, id="
+ processInstance.getId()
+ ", version="
+ processInstance.getRevision());
session.addLockedBatch(loadedProcessInstance.getPrimaryEntity().getId(), batch);
return loadedProcessInstance;
}
