diff --git a/src/message.rs b/src/message.rs
index ec58198..7c6c683 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -48,6 +48,8 @@ enum Action {
     Create,
     Delete,
     Error,
+    GetLog,
+    Log,
     OnAddition,
     OnDelete,
     OnQuery,
@@ -67,6 +69,8 @@ impl From<MsgAction> for Action {
             MsgAction::Create(_) => Action::Create,
             MsgAction::Delete(_) => Action::Delete,
             MsgAction::Error(_) => Action::Error,
+            MsgAction::GetLog(_) => Action::GetLog,
+            MsgAction::Log(_) => Action::Log,
             MsgAction::OnAddition(_) => Action::OnAddition,
             MsgAction::OnDelete(_) => Action::OnDelete,
             MsgAction::OnQuery(_) => Action::OnQuery,
@@ -135,6 +139,8 @@ enum MsgAction {
     // Alter
     // Remove
     Error(MTTError),
+    GetLog(Uuid),
+    Log(Vec<MsgEntry>),
     OnAddition(Records),
     OnDelete(Records),
     OnQuery(Records),
@@ -202,6 +208,18 @@ impl From<Update> for MsgAction {
     }
 }
 
+impl From<Uuid> for MsgAction {
+    fn from(value: Uuid) -> Self {
+        MsgAction::GetLog(value)
+    }
+}
+
+impl From<&Uuid> for MsgAction {
+    fn from(value: &Uuid) -> Self {
+        Self::from(value.clone())
+    }
+}
+
 #[cfg(test)]
 mod msgactions {
     use super::*;
@@ -2690,13 +2708,14 @@ impl IndexType {
     }
 }
 
-#[derive(Clone, Debug, Eq, Hash, PartialEq)]
+#[derive(Clone, Debug)]
 enum DocFuncType {
-    Action,
     Add,
     Delete,
+    ExistingQuery(MsgAction),
     Query,
     Show,
+    Trigger(MsgAction),
     Update,
 }
 
@@ -2888,6 +2907,10 @@ impl DocDef {
     fn iter_routes(&self) -> impl Iterator<Item = &PathAction> {
         self.routes.iter()
     }
+
+    fn add_route(&mut self, path: Path, action: DocFuncType) {
+        self.routes.push(PathAction::new(path, action));
+    }
 }
 
 #[cfg(test)]
@@ -2997,7 +3020,7 @@ mod docdefs {
             docdef.routes
         );
         let mut actions: HashSet<Action> = HashSet::new();
-        let mut doc_funcs: HashSet<DocFuncType> = HashSet::new();
+        let mut doc_funcs: HashSet<String> = HashSet::new();
         for path_action in docdef.iter_routes() {
             let path = path_action.path();
             match &path.msg_id {
@@ -3024,11 +3047,11 @@ mod docdefs {
             };
             let file_func = path_action.doc_function();
             match file_func {
-                DocFuncType::Add => doc_funcs.insert(file_func),
-                DocFuncType::Delete => doc_funcs.insert(file_func),
-                DocFuncType::Query => doc_funcs.insert(file_func),
-                DocFuncType::Show => doc_funcs.insert(file_func),
-                DocFuncType::Update => doc_funcs.insert(file_func),
+                DocFuncType::Add => doc_funcs.insert("Add".to_string()),
+                DocFuncType::Delete => doc_funcs.insert("Delete".to_string()),
+                DocFuncType::Query => doc_funcs.insert("Query".to_string()),
+                DocFuncType::Show => doc_funcs.insert("Show".to_string()),
+                DocFuncType::Update => doc_funcs.insert("Update".to_string()),
                 _ => unreachable!("got {:?}, which is not a default function", file_func),
             };
         }
@@ -3045,6 +3068,45 @@ mod docdefs {
             doc_funcs
         );
     }
+
+    #[test]
+    fn add_route_function() {
+        let docname = Name::english(Uuid::new_v4().to_string().as_str());
+        let mut docdef = DocDef::new(docname.clone());
+        docdef.add_route(
+            Path::new(
+                Include::All,
+                Include::Some(docname.clone().into()),
+                Include::Some(Action::OnQuery),
+            ),
+            DocFuncType::Trigger(Update::new(Query::new()).into()),
+        );
+        let path_action = docdef.iter_routes().last().unwrap();
+        let path = path_action.path();
+        match &path.msg_id {
+            Include::All => {}
+            _ => unreachable!("got {:?}, message id should include all", path.msg_id),
+        };
+        match &path.doc {
+            Include::Some(output) => match output {
+                NameType::Name(data) => assert_eq!(data, &docname),
+                _ => unreachable!("got {:?}, name type should be {:?}", path.doc, docname),
+            },
+            _ => unreachable!("got {:?}, name type should be {:?}", path.doc, docname),
+        };
+        match &path.action {
+            Include::Some(output) => match output {
+                Action::OnQuery => {}
+                _ => unreachable!("got {:?} which is not a additional action", output),
+            },
+            _ => unreachable!("got {:?}, which is not on query action", path.action),
+        }
+        let file_func = path_action.doc_function();
+        match file_func {
+            DocFuncType::Trigger(_) => {}
+            _ => unreachable!("got {:?}, which is not a default function", file_func),
+        }
+    }
 }
 
 #[derive(Clone, Debug)]
@@ -3888,6 +3950,10 @@ impl Records {
     fn iter(&self) -> impl Iterator<Item = Record> {
         RecordIter::new(self)
     }
+
+    fn get_internal_records(&self) -> &InternalRecords {
+        &self.data
+    }
 }
 
 struct RecordIter {
@@ -4495,6 +4561,7 @@ impl DocumentFile {
                         DocFuncType::Query => self.query(&msg),
                         DocFuncType::Show => self.queue.send(msg.response(Reply::new())).unwrap(),
                         DocFuncType::Update => self.update(&msg),
+                        DocFuncType::ExistingQuery(action) => self.existing_query(&msg, action),
                         _ => {}
                     }
                 }
@@ -4696,6 +4763,48 @@ impl DocumentFile {
             .unwrap();
     }
 
+    fn run_update(
+        &mut self,
+        original: &InternalRecords,
+        update: &Update,
+    ) -> Result<InternalRecords, MTTError> {
+        let mut changes: HashMap<Uuid, &CalcValue> = HashMap::new();
+        for (key, value) in update.get_values().iter() {
+            let field_id = match self.docdef.get_field_id(key) {
+                Ok(data) => data,
+                Err(err) => return Err(err),
+            };
+            changes.insert(field_id, value);
+        }
+        let mut indexes = self.docdef.create_indexes();
+        let mut updates = InternalRecords::new();
+        for (oid, record) in original.iter() {
+            let mut holder = record.clone();
+            for (field_id, value) in changes.iter() {
+                let field = value.get(holder.get(field_id).unwrap());
+                let correction = match self.validate(field_id, &field) {
+                    Ok(data) => data,
+                    Err(err) => return Err(err),
+                };
+                holder.insert(field_id.clone(), correction.clone());
+                match indexes.add_to_index(&field_id, correction, oid.clone()) {
+                    Ok(_) => {}
+                    Err(err) => return Err(err),
+                }
+            }
+            updates.insert(oid.clone(), holder);
+        }
+        for (oid, new_rec) in updates.iter() {
+            let old_rec = original.get(oid).unwrap();
+            for (field_id, index) in self.indexes.iter_mut() {
+                index.remove(old_rec.get(field_id).unwrap(), oid);
+                index.add(new_rec.get(field_id).unwrap().clone(), oid.clone());
+            }
+            self.docs.insert(oid.clone(), new_rec.clone());
+        }
+        Ok(updates.clone())
+    }
+
     fn update(&mut self, msg: &Message) {
         let update = match msg.get_action() {
             MsgAction::Update(data) => data,
@@ -4709,58 +4818,33 @@ impl DocumentFile {
                 return;
             }
         };
-        let mut changes: HashMap<Uuid, &CalcValue> = HashMap::new();
-        for (key, value) in update.get_values().iter() {
-            let field_id = match self.docdef.get_field_id(key) {
-                Ok(data) => data,
-                Err(err) => {
-                    let reply = msg.response(err);
-                    self.queue.send(reply).unwrap();
-                    return;
-                }
-            };
-            changes.insert(field_id, value);
-        }
-        let mut indexes = self.docdef.create_indexes();
-        let mut updates = InternalRecords::new();
-        for (oid, record) in original.iter() {
-            let mut holder = record.clone();
-            for (field_id, value) in changes.iter() {
-                let field = value.get(holder.get(field_id).unwrap());
-                let correction = match self.validate(field_id, &field) {
-                    Ok(data) => data,
-                    Err(err) => {
-                        let reply = msg.response(err);
-                        self.queue.send(reply).unwrap();
-                        return;
-                    }
-                };
-                holder.insert(field_id.clone(), correction.clone());
-                match indexes.add_to_index(&field_id, correction, oid.clone()) {
-                    Ok(_) => {}
-                    Err(err) => {
-                        let reply = msg.response(err);
-                        self.queue.send(reply).unwrap();
-                        return;
-                    }
-                }
+        let data = match self.run_update(&original, update) {
+            Ok(output) => output,
+            Err(err) => {
+                let reply = msg.response(err);
+                self.queue.send(reply).unwrap();
+                return;
             }
-            updates.insert(oid.clone(), holder);
-        }
-        for (oid, new_rec) in updates.iter() {
-            let old_rec = original.get(oid).unwrap();
-            for (field_id, index) in self.indexes.iter_mut() {
-                index.remove(old_rec.get(field_id).unwrap(), oid);
-                index.add(new_rec.get(field_id).unwrap().clone(), oid.clone());
-            }
-            self.docs.insert(oid.clone(), new_rec.clone());
-        }
-        let recs = Records::with_data(self.docdef.get_field_names().clone(), updates);
+        };
+        let recs = Records::with_data(self.docdef.get_field_names().clone(), data);
         self.queue.send(msg.response(recs.clone())).unwrap();
         self.queue
             .send(msg.response(MsgAction::OnUpdate(recs)))
             .unwrap();
     }
+
+    fn existing_query(&mut self, msg: &Message, action: &MsgAction) {
+        let recs = match msg.get_action() {
+            MsgAction::OnQuery(data) => data,
+            _ => unreachable!("should only receive on messages"),
+        };
+        match action {
+            MsgAction::Update(change) => self
+                .run_update(recs.get_internal_records(), change)
+                .unwrap(),
+            _ => panic!("should not get here"),
+        };
+    }
 }
 
 #[cfg(test)]
@@ -6264,6 +6348,20 @@ mod document_files {
     #[ignore]
     fn can_query_trigger_reaction() {
         let mut doc = TestDocument::new([FieldType::Integer].to_vec());
+        let doc_name = doc.get_docdef().get_document_names()[0].clone();
+        let path = Path::new(
+            Include::All,
+            Include::Some(doc_name.into()),
+            Include::Some(Action::OnQuery),
+        );
+        let mut update = Update::new(Query::new());
+        let mut calc = Calculation::new(Operand::Add);
+        calc.add_value(CalcValue::Existing(FieldType::Integer));
+        calc.add_value(1);
+        update
+            .get_values_mut()
+            .add_field(Name::english("field0"), calc);
+        let function = DocFuncType::ExistingQuery(update.into());
         doc.start(standard_paths());
         doc.populate([0.into()].to_vec());
         for i in 0..5 {
@@ -6499,3 +6597,232 @@ mod clocks {
         }
     }
 }
+
+#[derive(Clone, Debug)]
+struct MsgEntry {
+    timestamp: DateTime<Utc>,
+    message: Message,
+}
+
+impl MsgEntry {
+    fn new(msg: Message) -> Self {
+        Self {
+            timestamp: Utc::now(),
+            message: msg,
+        }
+    }
+
+    fn get_timestamp(&self) -> &DateTime<Utc> {
+        &self.timestamp
+    }
+
+    fn get_message(&self) -> &Message {
+        &self.message
+    }
+
+    fn get_message_id(&self) -> &Uuid {
+        self.message.get_message_id()
+    }
+}
+
+#[cfg(test)]
+mod msg_entries {
+    use super::*;
+
+    #[test]
+    fn creates_message_entry() {
+        let msg = Message::new(Name::english("holder"), Query::new());
+        let start = Utc::now();
+        let entry = MsgEntry::new(msg.clone());
+        let end = Utc::now();
+        assert!(
+            entry.get_timestamp() > &start,
+            "timestamp should be between start and end times"
+        );
+        assert!(
+            entry.get_timestamp() < &end,
+            "timestamp should be between start and end times"
+        );
+        assert_eq!(entry.get_message_id(), msg.get_message_id());
+    }
+}
+
+#[derive(Clone, Debug)]
+struct MsgLogs {
+    data: HashMap<Uuid, Vec<MsgEntry>>,
+}
+
+impl MsgLogs {
+    fn new() -> Self {
+        Self {
+            data: HashMap::new(),
+        }
+    }
+
+    fn add(&mut self, msg: Message) {
+        let entry = MsgEntry::new(msg);
+        let id = entry.get_message_id();
+        let entries = match self.data.get_mut(id) {
+            Some(data) => data,
+            None => {
+                self.data.insert(id.clone(), Vec::new());
+                self.data.get_mut(id).unwrap()
+            }
+        };
+        entries.push(entry);
+    }
+
+    fn get(&self, msg_id: &Uuid) -> Option<&Vec<MsgEntry>> {
+        self.data.get(msg_id)
+    }
+}
+
+#[cfg(test)]
+mod msg_logs {
+    use super::*;
+
+    #[test]
+    fn can_add_message_to_log() {
+        let mut logs = MsgLogs::new();
+        let msg = Message::new(Name::english("something"), Query::new());
+        logs.add(msg.clone());
+        let result = logs.get(msg.get_message_id()).unwrap();
+        assert_eq!(result.len(), 1, "should be one entry");
+    }
+
+    #[test]
+    fn returns_none_when_no_logs_found() {
+        let logs = MsgLogs::new();
+        match logs.get(&Uuid::nil()) {
+            Some(data) => unreachable!("got {:?}, should return none", data),
+            None => (),
+        }
+    }
+
+    #[test]
+    fn stores_messages_with_responses() {
+        let mut logs = MsgLogs::new();
+        let msg1 = Message::new(Name::english("something"), Query::new());
+        let msg2 = msg1.response(Records::new(Names::new()));
+        logs.add(msg1.clone());
+        logs.add(msg2.clone());
+        let result = logs.get(msg1.get_message_id()).unwrap();
+        assert_eq!(result.len(), 2, "should be two entry");
+        let action1: Action = result[0].get_message().get_action().clone().into();
+        let action2: Action = result[1].get_message().get_action().clone().into();
+        assert_eq!(action1, Action::Query);
+        assert_eq!(action2, Action::Records);
+    }
+
+    #[test]
+    fn messages_are_stored_by_ids() {
+        let mut logs = MsgLogs::new();
+        let msg1 = Message::new(Name::english("something"), Query::new());
+        let msg2 = Message::new(Name::english("something"), Query::new());
+        logs.add(msg1.clone());
+        logs.add(msg2.clone());
+        let result1 = logs.get(msg1.get_message_id()).unwrap();
+        let result2 = logs.get(msg2.get_message_id()).unwrap();
+        assert_eq!(result1.len(), 1, "should be one entry");
+        assert_eq!(result2.len(), 1, "should be one entry");
+        assert_eq!(result1[0].get_message_id(), msg1.get_message_id());
+        assert_eq!(result2[0].get_message_id(), msg2.get_message_id());
+    }
+}
+
+struct MessageLog {
+    data: MsgLogs,
+    queue: Queue,
+    rx: Receiver<Message>,
+}
+
+impl MessageLog {
+    fn new(queue: Queue, rx: Receiver<Message>) -> Self {
+        Self {
+            data: MsgLogs::new(),
+            queue: queue,
+            rx: rx,
+        }
+    }
+
+    fn start(mut queue: Queue) {
+        let (tx, rx) = channel();
+        let mut logs = MessageLog::new(queue.clone(), rx);
+        let id = queue.add_sender(tx);
+        let reg_msg = Register::new(
+            id,
+            RegMsg::AddRoute(Path::new(Include::All, Include::All, Include::All)),
+        );
+        let rmsg = Message::new(NameType::None, reg_msg);
+        queue.send(rmsg.clone()).unwrap();
+        spawn(move || {
+            logs.listen();
+        });
+    }
+
+    fn listen(&mut self) {
+        loop {
+            let msg = self.rx.recv().unwrap();
+            match msg.get_action() {
+                MsgAction::GetLog(id) => match self.data.get(id) {
+                    Some(data) => self
+                        .queue
+                        .send(msg.response(MsgAction::Log(data.clone())))
+                        .unwrap(),
+                    None => self
+                        .queue
+                        .send(msg.response(MsgAction::Log(Vec::new())))
+                        .unwrap(),
+                },
+                _ => self.data.add(msg),
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod message_logs {
+    use super::{support_test::TIMEOUT, *};
+
+    #[test]
+    fn does_log_store_messages() {
+        let doc_name = Name::english("unimportant");
+        let mut queue = Queue::new();
+        MessageLog::start(queue.clone());
+        let (tx, rx) = channel();
+        let id = queue.add_sender(tx);
+        let reg_msg = Register::new(id, RegMsg::AddDocName(vec![doc_name.clone()]));
+        let rmsg = Message::new(NameType::None, reg_msg);
+        queue.send(rmsg.clone()).unwrap();
+        let name_result = rx.recv().unwrap();
+        let name_id = match name_result.get_action() {
+            MsgAction::Register(data) => match data.get_msg() {
+                RegMsg::DocumentNameID(data) => data,
+                RegMsg::Error(err) => unreachable!("got {:?}, should have gotten data", err),
+                _ => unreachable!("should only return a name id or an error"),
+            },
+            _ => unreachable!("should only return a name id or an error"),
+        };
+        let request = Register::new(
+            id.clone(),
+            RegMsg::AddRoute(Path::new(
+                Include::All,
+                Include::All,
+                Include::Some(Action::Log),
+            )),
+        );
+        queue.send(Message::new(NameType::None, request)).unwrap();
+        rx.recv_timeout(TIMEOUT).unwrap();
+        let msg = Message::new(doc_name.clone(), Query::new());
+        let start = Utc::now();
+        queue.send(msg.clone()).unwrap();
+        let log_msg = Message::new(NameType::None, msg.get_message_id());
+        queue.send(log_msg.clone()).unwrap();
+        let result = rx.recv_timeout(TIMEOUT).unwrap();
+        assert_eq!(result.get_message_id(), log_msg.get_message_id());
+        match result.get_action() {
+            MsgAction::Log(output) => assert_eq!(output.len(), 1),
+            _ => unreachable!("got {:?}, should have been log", result.get_action()),
+        }
+    }
+}